Using @SuperBuilder for LayerConfigurations

Signed-off-by: brian <brian@brutex.de>

cavis-common-platform/build.gradle

@@ -71,7 +71,7 @@ dependencies {
        // api "com.fasterxml.jackson.module:jackson-module-scala_${scalaVersion}"
 
 
-        api "org.projectlombok:lombok:1.18.24"
+        api "org.projectlombok:lombok:1.18.26"
 
         /*Logging*/
         api 'org.slf4j:slf4j-api:2.0.3'

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/dtypes/DTypeTests.java

@@ -507,7 +507,7 @@ public class DTypeTests extends BaseDL4JTest {
                             .updater(new Adam(1e-2))
 
                             .layer(ConvolutionLayer.builder().kernelSize(2, 2).stride(1, 1).nOut(3).activation(Activation.TANH).build())
-                            .layer(new LocalResponseNormalization())
+                            .layer(LocalResponseNormalization.builder())
                             .layer(DropoutLayer.builder(0.5).build())
                             .layer(DropoutLayer.builder(new AlphaDropout(0.5)).build())
                             .layer(DropoutLayer.builder(new GaussianDropout(0.5)).build())
@@ -519,12 +519,12 @@ public class DTypeTests extends BaseDL4JTest {
 //                            .layer(LocallyConnected2D.builder().nOut(3).kernelSize(2,2).stride(1,1).activation(Activation.SIGMOID).build())   //EXCEPTION
                             .layer(ZeroPaddingLayer.builder(1, 1).build())
                             .layer(Cropping2D.builder(1, 1).build())
-                            .layer(new IdentityLayer())
+                            .layer(IdentityLayer.builder())
                             .layer(Upsampling2D.builder().size(2).build())
                             .layer(SubsamplingLayer.builder().kernelSize(2, 2).stride(2, 2).build())
                             .layer(DepthwiseConvolution2D.builder().nOut(3).activation(Activation.RELU).build())
                             .layer(SeparableConvolution2D.builder().nOut(3).activation(Activation.HARDTANH).build())
-                            .layer(new MaskLayer())
+                            .layer(MaskLayer.builder())
                             .layer(BatchNormalization.builder().build())
                             .layer(ActivationLayer.builder().activation(Activation.LEAKYRELU).build())
                             .layer(secondLast)

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/layers/normalization/LocalResponseTest.java

@@ -114,7 +114,8 @@ public class LocalResponseTest extends BaseDL4JTest {
                         .layer(LocalResponseNormalization.builder().k(2).n(5).alpha(1e-4).beta(0.75).build())
                         .build();
 
-        layer = new LocalResponseNormalization().instantiate(conf, null, 0, null, false, Nd4j.defaultFloatingPointType());
+        layer = LocalResponseNormalization.builder().build()
+                .instantiate(conf, null, 0, null, false, Nd4j.defaultFloatingPointType());
         activationsActual = layer.activate(x, false, LayerWorkspaceMgr.noWorkspaces());
     }
 

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/layers/recurrent/RnnDataFormatTests.java

@@ -243,7 +243,7 @@ public class RnnDataFormatTests extends BaseDL4JTest {
             layer = MaskZeroLayer.builder().maskingValue(0.).underlying(layer).build();
         }
         if(lastTimeStep){
-            layer = LastTimeStep.builder(layer);
+            layer = LastTimeStep.builder(layer).build();
         }
         NeuralNetConfiguration.NeuralNetConfigurationBuilder builder = (NeuralNetConfiguration.NeuralNetConfigurationBuilder) NeuralNetConfiguration.builder()
                 .seed(12345)

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/layers/samediff/testlayers/SameDiffDense.java

@@ -20,6 +20,8 @@
 
 package org.deeplearning4j.nn.layers.samediff.testlayers;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import java.util.*;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
@@ -27,8 +29,8 @@ import lombok.experimental.SuperBuilder;
 import org.deeplearning4j.nn.conf.InputPreProcessor;
 import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
 import org.deeplearning4j.nn.conf.inputs.InputType;
-import org.deeplearning4j.nn.conf.layers.samediff.SameDiffLayer;
 import org.deeplearning4j.nn.conf.layers.samediff.SDLayerParams;
+import org.deeplearning4j.nn.conf.layers.samediff.SameDiffLayer;
 import org.deeplearning4j.nn.conf.layers.samediff.SameDiffLayerUtils;
 import org.deeplearning4j.nn.params.DefaultParamInitializer;
 import org.deeplearning4j.nn.weights.WeightInitUtil;
@@ -36,20 +38,22 @@ import org.nd4j.autodiff.samediff.SDVariable;
 import org.nd4j.autodiff.samediff.SameDiff;
 import org.nd4j.linalg.activations.Activation;
 import org.nd4j.linalg.api.ndarray.INDArray;
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-
-import java.util.*;
 
 @Data
-@EqualsAndHashCode(callSuper = true, exclude = {"paramShapes"})
+@EqualsAndHashCode(
+    callSuper = true,
+    exclude = {"paramShapes"})
 @NoArgsConstructor()
 @JsonIgnoreProperties("paramShapes")
 @SuperBuilder
 public class SameDiffDense extends SameDiffLayer {
 
-    private static final List<String> W_KEYS = Collections.singletonList(DefaultParamInitializer.WEIGHT_KEY);
+  private static final List<String> W_KEYS =
-    private static final List<String> B_KEYS = Collections.singletonList(DefaultParamInitializer.BIAS_KEY);
+      Collections.singletonList(DefaultParamInitializer.WEIGHT_KEY);
-    private static final List<String> PARAM_KEYS = Arrays.asList(DefaultParamInitializer.WEIGHT_KEY, DefaultParamInitializer.BIAS_KEY);
+  private static final List<String> B_KEYS =
+      Collections.singletonList(DefaultParamInitializer.BIAS_KEY);
+  private static final List<String> PARAM_KEYS =
+      Arrays.asList(DefaultParamInitializer.WEIGHT_KEY, DefaultParamInitializer.BIAS_KEY);
 
   private final Map<String, long[]> paramShapes = new HashMap<>();
 
@@ -57,8 +61,6 @@ public class SameDiffDense extends SameDiffLayer {
   private long nOut;
   private Activation activation;
 
-
-
   @Override
   public InputType getOutputType(int layerIndex, InputType inputType) {
     return null;
@@ -66,8 +68,8 @@ public class SameDiffDense extends SameDiffLayer {
 
   @Override
   public void setNIn(InputType inputType, boolean override) {
-        if(override){
+    if (override) {
-            this.nIn = ((InputType.InputTypeFeedForward)inputType).getSize();
+      this.nIn = ((InputType.InputTypeFeedForward) inputType).getSize();
     }
   }
 
@@ -84,23 +86,26 @@ public class SameDiffDense extends SameDiffLayer {
   }
 
   @Override
-    public void initializeParameters(Map<String,INDArray> params){
+  public void initializeParameters(Map<String, INDArray> params) {
-        for(Map.Entry<String,INDArray> e : params.entrySet()){
+    for (Map.Entry<String, INDArray> e : params.entrySet()) {
-            if(paramWeightInit != null && paramWeightInit.containsKey(e.getKey())){
+      if (paramWeightInit != null && paramWeightInit.containsKey(e.getKey())) {
         paramWeightInit.get(e.getKey()).init(nIn, nOut, e.getValue().shape(), 'c', e.getValue());
       } else {
-                if(DefaultParamInitializer.BIAS_KEY.equals(e.getKey())){
+        if (DefaultParamInitializer.BIAS_KEY.equals(e.getKey())) {
           e.getValue().assign(0.0);
         } else {
-                    //Normally use 'c' order, but use 'f' for direct comparison to DL4J DenseLayerConfiguration
+          // Normally use 'c' order, but use 'f' for direct comparison to DL4J
-                    WeightInitUtil.initWeights(nIn, nOut, new long[]{nIn, nOut}, weightInit, null, 'f', e.getValue());
+          // DenseLayerConfiguration
+          WeightInitUtil.initWeights(
+              nIn, nOut, new long[] {nIn, nOut}, weightInit, null, 'f', e.getValue());
         }
       }
     }
   }
 
   @Override
-    public SDVariable defineLayer(SameDiff sd, SDVariable layerInput, Map<String, SDVariable> paramTable, SDVariable mask) {
+  public SDVariable defineLayer(
+      SameDiff sd, SDVariable layerInput, Map<String, SDVariable> paramTable, SDVariable mask) {
     SDVariable weights = paramTable.get(DefaultParamInitializer.WEIGHT_KEY);
     SDVariable bias = paramTable.get(DefaultParamInitializer.BIAS_KEY);
 
@@ -110,17 +115,16 @@ public class SameDiffDense extends SameDiffLayer {
   }
 
   @Override
-    public void applyGlobalConfigToLayer(NeuralNetConfiguration.NeuralNetConfigurationBuilder globalConfig) {
+  public void applyGlobalConfigToLayer(
+      NeuralNetConfiguration.NeuralNetConfigurationBuilder globalConfig) {
     NeuralNetConfiguration clone = globalConfig.clone().build();
-        if(activation == null){
+    if (activation == null) {
       activation = SameDiffLayerUtils.fromIActivation(clone.getActivation());
     }
   }
 
-    public char paramReshapeOrder(String param){
+  public char paramReshapeOrder(String param) {
-        //To match DL4J for easy comparison
+    // To match DL4J for easy comparison
     return 'f';
   }
-
-
 }

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/layers/samediff/testlayers/SameDiffMSEOutputLayer.java

@@ -20,6 +20,7 @@
 
 package org.deeplearning4j.nn.layers.samediff.testlayers;
 
+import java.util.Map;
 import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
 import org.deeplearning4j.nn.conf.inputs.InputType;
 import org.deeplearning4j.nn.conf.layers.samediff.SDLayerParams;
@@ -31,8 +32,6 @@ import org.nd4j.autodiff.samediff.SameDiff;
 import org.nd4j.linalg.activations.Activation;
 import org.nd4j.linalg.api.ndarray.INDArray;
 
-import java.util.Map;
-
 public class SameDiffMSEOutputLayer extends SameDiffOutputLayer {
 
   private final int nIn;
@@ -40,7 +39,7 @@ public class SameDiffMSEOutputLayer extends SameDiffOutputLayer {
   private final Activation activation;
   private final WeightInit weightInit;
 
-    public SameDiffMSEOutputLayer(int nIn, int nOut, Activation activation, WeightInit weightInit){
+  public SameDiffMSEOutputLayer(int nIn, int nOut, Activation activation, WeightInit weightInit) {
     this.nIn = nIn;
     this.nOut = nOut;
     this.activation = activation;
@@ -48,10 +47,14 @@ public class SameDiffMSEOutputLayer extends SameDiffOutputLayer {
   }
 
   @Override
-    public SDVariable defineLayer(SameDiff sameDiff, SDVariable layerInput, SDVariable labels, Map<String, SDVariable> paramTable) {
+  public SDVariable defineLayer(
+      SameDiff sameDiff,
+      SDVariable layerInput,
+      SDVariable labels,
+      Map<String, SDVariable> paramTable) {
     SDVariable z = sameDiff.mmul(layerInput, paramTable.get("W")).add(paramTable.get("b"));
     SDVariable out = activation.asSameDiff("out", sameDiff, z);
-        //MSE: 1/nOut * (input-labels)^2
+    // MSE: 1/nOut * (input-labels)^2
     SDVariable diff = out.sub(labels);
     return diff.mul(diff).mean(1).sum();
   }
@@ -69,7 +72,8 @@ public class SameDiffMSEOutputLayer extends SameDiffOutputLayer {
 
   @Override
   public void initializeParameters(Map<String, INDArray> params) {
-        WeightInitUtil.initWeights(nIn, nOut, new long[]{nIn, nOut}, weightInit, null, 'f', params.get("W"));
+    WeightInitUtil.initWeights(
+        nIn, nOut, new long[] {nIn, nOut}, weightInit, null, 'f', params.get("W"));
     params.get("b").assign(0.0);
   }
 
@@ -79,14 +83,12 @@ public class SameDiffMSEOutputLayer extends SameDiffOutputLayer {
   }
 
   @Override
-    public char paramReshapeOrder(String param){
+  public char paramReshapeOrder(String param) {
-        //To match DL4J for easy comparison
+    // To match DL4J for easy comparison
     return 'f';
   }
 
   @Override
-    public void applyGlobalConfigToLayer(NeuralNetConfiguration.NeuralNetConfigurationBuilder globalConfig){
+  public void applyGlobalConfigToLayer(
-
+      NeuralNetConfiguration.NeuralNetConfigurationBuilder globalConfig) {}
-    }
-
 }

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/nn/multilayer/MultiLayerTestRNN.java

@@ -787,7 +787,7 @@ public class MultiLayerTestRNN extends BaseDL4JTest {
 
         NeuralNetConfiguration conf = NeuralNetConfiguration.builder()
                 .list()
-                .layer(new FrozenLayer(org.deeplearning4j.nn.conf.layers.LSTM.builder()
+                .layer(FrozenLayer.builder(org.deeplearning4j.nn.conf.layers.LSTM.builder()
                         .nIn(5).nOut(5).build()))
                 .build();
 

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/regressiontest/MiscRegressionTests.java

@@ -67,7 +67,7 @@ public class MiscRegressionTests extends BaseDL4JTest {
     public void testFrozenNewFormat(){
         NeuralNetConfiguration configuration = NeuralNetConfiguration.builder()
                 .list()
-                .layer(0, new FrozenLayer(DenseLayer.builder().nIn(10).nOut(10).build()))
+                .layer(0, FrozenLayer.builder(DenseLayer.builder().nIn(10).nOut(10).build()))
                 .build();
 
         String json = configuration.toJson();

cavis-dnn/cavis-dnn-core/src/test/java/org/deeplearning4j/regressiontest/customlayer100a/CustomLayer.java

@@ -20,9 +20,10 @@
 
 package org.deeplearning4j.regressiontest.customlayer100a;
 
+import java.util.Collection;
+import java.util.Map;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import lombok.Setter;
 import lombok.experimental.SuperBuilder;
 import lombok.val;
 import org.deeplearning4j.nn.api.Layer;
@@ -35,49 +36,52 @@ import org.deeplearning4j.nn.conf.memory.LayerMemoryReport;
 import org.deeplearning4j.nn.conf.memory.MemoryReport;
 import org.deeplearning4j.nn.params.DefaultParamInitializer;
 import org.deeplearning4j.optimize.api.TrainingListener;
-import org.nd4j.linalg.activations.Activation;
 import org.nd4j.linalg.activations.IActivation;
 import org.nd4j.linalg.api.buffer.DataType;
 import org.nd4j.linalg.api.ndarray.INDArray;
 
-import java.util.Collection;
-import java.util.Map;
-
 @NoArgsConstructor
 @SuperBuilder
 public class CustomLayer extends FeedForwardLayer {
   /**
-     * A custom property used in this custom layer example. See the CustomLayerExampleReadme.md for details
+   * A custom property used in this custom layer example. See the CustomLayerExampleReadme.md for
+   * details
    *
    * @param secondActivationFunction Second activation function for the layer
    */
-@Getter
+  @Getter private IActivation secondActivationFunction;
-    private IActivation secondActivationFunction;
-
-
 
   @Override
-    public Layer instantiate(NeuralNetConfiguration conf, Collection<TrainingListener> iterationListeners,
+  public Layer instantiate(
-                             int layerIndex, INDArray layerParamsView, boolean initializeParams, DataType networkDataType) {
+      NeuralNetConfiguration conf,
+      Collection<TrainingListener> iterationListeners,
+      int layerIndex,
+      INDArray layerParamsView,
+      boolean initializeParams,
+      DataType networkDataType) {
 
     LayerConfiguration lconf = conf.getFlattenedLayerConfigurations().get(0);
-        //The instantiate method is how we go from the configuration class (i.e., this class) to the implementation class
+    // The instantiate method is how we go from the configuration class (i.e., this class) to the
+    // implementation class
     // (i.e., a CustomLayerImpl instance)
-        //For the most part, it's the same for each type of layer
+    // For the most part, it's the same for each type of layer
     runInheritance();
 
     CustomLayerImpl myCustomLayer = new CustomLayerImpl(lconf, networkDataType);
-        myCustomLayer.addTrainingListeners(iterationListeners);             //Set the iteration listeners, if any
+    myCustomLayer.addTrainingListeners(iterationListeners); // Set the iteration listeners, if any
-        myCustomLayer.setIndex(layerIndex);                         //Integer index of the layer
+    myCustomLayer.setIndex(layerIndex); // Integer index of the layer
 
-        //Parameter view array: In Deeplearning4j, the network parameters for the entire network (all layers) are
+    // Parameter view array: In Deeplearning4j, the network parameters for the entire network (all
-        // allocated in one big array. The relevant section of this parameter vector is extracted out for each layer,
+    // layers) are
+    // allocated in one big array. The relevant section of this parameter vector is extracted out
+    // for each layer,
     // (i.e., it's a "view" array in that it's a subset of a larger array)
     // This is a row vector, with length equal to the number of parameters in the layer
     myCustomLayer.setParamsViewArray(layerParamsView);
 
-        //Initialize the layer parameters. For example,
+    // Initialize the layer parameters. For example,
-        // Note that the entries in paramTable (2 entries here: a weight array of shape [nIn,nOut] and biases of shape [1,nOut]
+    // Note that the entries in paramTable (2 entries here: a weight array of shape [nIn,nOut] and
+    // biases of shape [1,nOut]
     // are in turn a view of the 'layerParamsView' array.
     Map<String, INDArray> paramTable = initializer().init(this, layerParamsView, initializeParams);
     myCustomLayer.setParamTable(paramTable);
@@ -87,22 +91,25 @@ public class CustomLayer extends FeedForwardLayer {
 
   @Override
   public ParamInitializer initializer() {
-        //This method returns the parameter initializer for this type of layer
+    // This method returns the parameter initializer for this type of layer
-        //In this case, we can use the DefaultParamInitializer, which is the same one used for DenseLayerConfiguration
+    // In this case, we can use the DefaultParamInitializer, which is the same one used for
-        //For more complex layers, you may need to implement a custom parameter initializer
+    // DenseLayerConfiguration
-        //See the various parameter initializers here:
+    // For more complex layers, you may need to implement a custom parameter initializer
-        //https://github.com/deeplearning4j/deeplearning4j/tree/master/deeplearning4j-core/src/main/java/org/deeplearning4j/nn/params
+    // See the various parameter initializers here:
+    // https://github.com/deeplearning4j/deeplearning4j/tree/master/deeplearning4j-core/src/main/java/org/deeplearning4j/nn/params
 
     return DefaultParamInitializer.getInstance();
   }
 
   @Override
   public LayerMemoryReport getMemoryReport(InputType inputType) {
-        //Memory report is used to estimate how much memory is required for the layer, for different configurations
+    // Memory report is used to estimate how much memory is required for the layer, for different
-        //If you don't need this functionality for your custom layer, you can return a LayerMemoryReport
+    // configurations
+    // If you don't need this functionality for your custom layer, you can return a
+    // LayerMemoryReport
     // with all 0s, or
 
-        //This implementation: based on DenseLayerConfiguration implementation
+    // This implementation: based on DenseLayerConfiguration implementation
     InputType outputType = getOutputType(-1, inputType);
 
     val numParams = initializer().numParams(this);
@@ -111,21 +118,26 @@ public class CustomLayer extends FeedForwardLayer {
     int trainSizeFixed = 0;
     int trainSizeVariable = 0;
     if (getDropOut() != null) {
-            //Assume we dup the input for dropout
+      // Assume we dup the input for dropout
       trainSizeVariable += inputType.arrayElementsPerExample();
     }
 
-        //Also, during backprop: we do a preOut call -> gives us activations size equal to the output size
+    // Also, during backprop: we do a preOut call -> gives us activations size equal to the output
+    // size
     // which is modified in-place by activation function backprop
     // then we have 'epsilonNext' which is equivalent to input size
     trainSizeVariable += outputType.arrayElementsPerExample();
 
     return new LayerMemoryReport.Builder(name, CustomLayer.class, inputType, outputType)
         .standardMemory(numParams, updaterStateSize)
-                .workingMemory(0, 0, trainSizeFixed,
+        .workingMemory(
-                        trainSizeVariable)     //No additional memory (beyond activations) for inference
+            0,
-                .cacheMemory(MemoryReport.CACHE_MODE_ALL_ZEROS,
+            0,
-                        MemoryReport.CACHE_MODE_ALL_ZEROS) //No caching in DenseLayerConfiguration
+            trainSizeFixed,
+            trainSizeVariable) // No additional memory (beyond activations) for inference
+        .cacheMemory(
+            MemoryReport.CACHE_MODE_ALL_ZEROS,
+            MemoryReport.CACHE_MODE_ALL_ZEROS) // No caching in DenseLayerConfiguration
         .build();
   }
 }

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/convolutional/KerasAtrousConvolution2D.java

@@ -20,6 +20,7 @@
 
 package org.deeplearning4j.nn.modelimport.keras.layers.convolutional;
 
+import lombok.val;
 import org.deeplearning4j.nn.api.layers.LayerConstraint;
 import org.deeplearning4j.nn.conf.CNN2DFormat;
 import org.deeplearning4j.nn.conf.inputs.InputType;
@@ -84,7 +85,7 @@ public class KerasAtrousConvolution2D extends KerasConvolution {
         IWeightInit init = getWeightInitFromConfig(layerConfig, conf.getLAYER_FIELD_INIT(),
                 enforceTrainingConfig, conf, kerasMajorVersion);
 
-        ConvolutionLayer.ConvolutionLayerBuilder builder = ConvolutionLayer.builder().name(this.name)
+        val builder = ConvolutionLayer.builder().name(this.name)
                 .nOut(getNOutFromConfig(layerConfig, conf)).dropOut(this.dropout)
                 .activation(getIActivationFromConfig(layerConfig, conf))
                 .weightInit(init)
@@ -92,7 +93,7 @@ public class KerasAtrousConvolution2D extends KerasConvolution {
                 .l1(this.weightL1Regularization).l2(this.weightL2Regularization)
                 .convolutionMode(getConvolutionModeFromConfig(layerConfig, conf))
                 .kernelSize(getKernelSizeFromConfig(layerConfig, 2, conf, kerasMajorVersion))
-                .dataFormat(dimOrder == DimOrder.TENSORFLOW ? CNN2DFormat.NHWC : CNN2DFormat.NCHW)
+                .convFormat(dimOrder == DimOrder.TENSORFLOW ? CNN2DFormat.NHWC : CNN2DFormat.NCHW)
                 .hasBias(hasBias)
                 .stride(getStrideFromConfig(layerConfig, 2, conf));
         int[] padding = getPaddingFromBorderModeConfig(layerConfig, 2, conf, kerasMajorVersion);

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/convolutional/KerasConvolution.java

@@ -40,7 +40,6 @@ import static org.deeplearning4j.nn.modelimport.keras.utils.KerasLayerUtils.remo
 @Slf4j
 @Data
 @EqualsAndHashCode(callSuper = false)
-@NoArgsConstructor
 abstract public class KerasConvolution extends KerasLayer {
 
     protected int numTrainableParams;
@@ -56,6 +55,10 @@ abstract public class KerasConvolution extends KerasLayer {
         super(kerasVersion);
     }
 
+    public KerasConvolution() throws UnsupportedKerasConfigurationException {
+        super();
+    }
+
     /**
      * Constructor from parsed Keras layer configuration dictionary.
      *

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/convolutional/KerasConvolution2D.java

@@ -23,6 +23,7 @@ package org.deeplearning4j.nn.modelimport.keras.layers.convolutional;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.extern.slf4j.Slf4j;
+import lombok.val;
 import org.deeplearning4j.nn.api.layers.LayerConstraint;
 import org.deeplearning4j.nn.conf.CNN2DFormat;
 import org.deeplearning4j.nn.conf.InputPreProcessor;
@@ -94,11 +95,11 @@ public class KerasConvolution2D extends KerasConvolution {
         LayerConstraint weightConstraint = KerasConstraintUtils.getConstraintsFromConfig(
                 layerConfig, conf.getLAYER_FIELD_W_CONSTRAINT(), conf, kerasMajorVersion);
 
-        ConvolutionLayer.ConvolutionLayerBuilder builder = ConvolutionLayer.builder().name(this.name)
+        final var builder = ConvolutionLayer.builder().name(this.name)
                 .nOut(getNOutFromConfig(layerConfig, conf)).dropOut(this.dropout)
                 .activation(getIActivationFromConfig(layerConfig, conf))
                 .weightInit(init)
-                .dataFormat(dimOrder == DimOrder.TENSORFLOW ? CNN2DFormat.NHWC : CNN2DFormat.NCHW)
+                .convFormat(dimOrder == DimOrder.TENSORFLOW ? CNN2DFormat.NHWC : CNN2DFormat.NCHW)
                 .l1(this.weightL1Regularization).l2(this.weightL2Regularization)
                 .convolutionMode(getConvolutionModeFromConfig(layerConfig, conf))
                 .kernelSize(getKernelSizeFromConfig(layerConfig, 2, conf, kerasMajorVersion))

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/convolutional/KerasDeconvolution2D.java

@@ -91,11 +91,11 @@ public class KerasDeconvolution2D extends KerasConvolution {
         LayerConstraint weightConstraint = KerasConstraintUtils.getConstraintsFromConfig(
                 layerConfig, conf.getLAYER_FIELD_W_CONSTRAINT(), conf, kerasMajorVersion);
 
-        var builder = Deconvolution2D.builder().name(this.name)
+        final var builder = Deconvolution2D.builder().name(this.name)
                 .nOut(getNOutFromConfig(layerConfig, conf)).dropOut(this.dropout)
                 .activation(getIActivationFromConfig(layerConfig, conf))
                 .weightInit(init)
-                .dataFormat(KerasConvolutionUtils.getDataFormatFromConfig(layerConfig,conf))
+                .convFormat(KerasConvolutionUtils.getDataFormatFromConfig(layerConfig,conf))
                 .l1(this.weightL1Regularization).l2(this.weightL2Regularization)
                 .convolutionMode(getConvolutionModeFromConfig(layerConfig, conf))
                 .kernelSize(getKernelSizeFromConfig(layerConfig, 2, conf, kerasMajorVersion))

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/core/KerasMasking.java

@@ -72,7 +72,7 @@ public class KerasMasking extends KerasLayer {
         maskingValue = KerasLayerUtils.getMaskingValueFromConfig(layerConfig, conf);
         this.layer = MaskZeroLayer.builder()
                 .maskingValue(maskingValue)
-                .underlying(new IdentityLayer(this.name))
+                .underlying(IdentityLayer.builder(this.name).build())
                 .name(this.name)
                 .build();
     }

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/local/KerasLocallyConnected1D.java

@@ -37,6 +37,7 @@ import org.deeplearning4j.nn.weights.WeightInit;
 import org.nd4j.linalg.api.ndarray.INDArray;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import static org.deeplearning4j.nn.modelimport.keras.layers.convolutional.KerasConvolutionUtils.*;
@@ -113,7 +114,7 @@ public class KerasLocallyConnected1D extends KerasConvolution {
         if (biasConstraint != null)
             builder.constrainBias(biasConstraint);
         if (weightConstraint != null)
-            builder.constrainWeights(weightConstraint);
+            builder.weightConstraints(List.of(weightConstraint));
         this.layer = builder.build();
 
     }

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/local/KerasLocallyConnected2D.java

@@ -36,6 +36,7 @@ import org.deeplearning4j.nn.weights.IWeightInit;
 import org.nd4j.linalg.api.ndarray.INDArray;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import static org.deeplearning4j.nn.modelimport.keras.layers.convolutional.KerasConvolutionUtils.*;
@@ -113,7 +114,7 @@ public class KerasLocallyConnected2D extends KerasConvolution {
         if (biasConstraint != null)
             builder.constrainBias(biasConstraint);
         if (weightConstraint != null)
-            builder.constrainWeights(weightConstraint);
+            builder.weightConstraints(List.of(weightConstraint));
         this.layer = builder.build();
     }
 

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/recurrent/KerasLSTM.java

@@ -179,7 +179,7 @@ public class KerasLSTM extends KerasLayer {
 
         Pair<Boolean, Double> maskingConfig = KerasLayerUtils.getMaskingConfiguration(inboundLayerNames, previousLayers);
 
-        LSTM.LSTMBuilder builder = LSTM.builder()
+        final var builder = LSTM.builder()
                 .gateActivationFunction(getGateActivationFromConfig(layerConfig))
                 .forgetGateBiasInit(getForgetBiasInitFromConfig(layerConfig, enforceTrainingConfig))
                 .name(this.name)
@@ -203,10 +203,10 @@ public class KerasLSTM extends KerasLayer {
 
         this.layer = builder.build();
         if (!returnSequences) {
-            this.layer = LastTimeStep.builder(this.layer);
+            this.layer = LastTimeStep.builder().underlying(this.layer).build();
         }
         if (maskingConfig.getFirst()) {
-            this.layer = new MaskZeroLayer(this.layer, maskingConfig.getSecond());
+            this.layer = MaskZeroLayer.builder().underlying(this.layer).maskingValue(maskingConfig.getSecond()).build();
         }
     }
 

cavis-dnn/cavis-dnn-modelimport/src/main/java/org/deeplearning4j/nn/modelimport/keras/layers/recurrent/KerasSimpleRnn.java

@@ -174,10 +174,10 @@ public class KerasSimpleRnn extends KerasLayer {
 
         this.layer = builder.build();
         if (!returnSequences) {
-            this.layer = LastTimeStep.builder(this.layer);
+            this.layer = LastTimeStep.builder(this.layer).build();
         }
         if (maskingConfig.getFirst()) {
-            this.layer = new MaskZeroLayer(this.layer, maskingConfig.getSecond());
+            this.layer = MaskZeroLayer.builder().underlying(this.layer).maskingValue(maskingConfig.getSecond()).build();
         }
     }
 

cavis-dnn/cavis-dnn-modelimport/src/test/java/org/deeplearning4j/nn/modelimport/keras/layers/local/KerasLocallyConnected2DTest.java

@@ -20,11 +20,18 @@
 
 package org.deeplearning4j.nn.modelimport.keras.layers.local;
 
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.deeplearning4j.BaseDL4JTest;
 import org.deeplearning4j.nn.conf.ConvolutionMode;
 import org.deeplearning4j.nn.conf.dropout.Dropout;
 import org.deeplearning4j.nn.conf.inputs.InputType;
 import org.deeplearning4j.nn.conf.layers.LocallyConnected2D;
-import org.deeplearning4j.BaseDL4JTest;
 import org.deeplearning4j.nn.modelimport.keras.KerasTestUtils;
 import org.deeplearning4j.nn.modelimport.keras.config.Keras1LayerConfiguration;
 import org.deeplearning4j.nn.modelimport.keras.config.Keras2LayerConfiguration;
@@ -32,14 +39,6 @@ import org.deeplearning4j.nn.modelimport.keras.config.KerasLayerConfiguration;
 import org.deeplearning4j.nn.weights.WeightInit;
 import org.junit.jupiter.api.Test;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
 /**
  * @author Max Pumperla
  */
@@ -54,30 +53,29 @@ public class KerasLocallyConnected2DTest extends BaseDL4JTest {
   private final double L2_REGULARIZATION = 0.02;
   private final double DROPOUT_KERAS = 0.3;
   private final double DROPOUT_DL4J = 1 - DROPOUT_KERAS;
-    private final int[] KERNEL_SIZE = new int[]{1, 2};
+  private final int[] KERNEL_SIZE = new int[] {1, 2};
-    private final int[] DILATION = new int[]{2, 2};
+  private final int[] DILATION = new int[] {2, 2};
-    private final int[] STRIDE = new int[]{3, 4};
+  private final int[] STRIDE = new int[] {3, 4};
   private final int N_OUT = 13;
   private final String BORDER_MODE_VALID = "valid";
-    private final int[] VALID_PADDING = new int[]{0, 0};
+  private final int[] VALID_PADDING = new int[] {0, 0};
 
   private final Integer keras1 = 1;
   private final Integer keras2 = 2;
   private final Keras1LayerConfiguration conf1 = new Keras1LayerConfiguration();
   private final Keras2LayerConfiguration conf2 = new Keras2LayerConfiguration();
 
-
   @Test
   public void testLocallyConnected2DLayer() throws Exception {
     buildLocallyConnected2DLayer(conf1, keras1);
     buildLocallyConnected2DLayer(conf2, keras2);
   }
 
-
   private void buildLocallyConnected2DLayer(KerasLayerConfiguration conf, Integer kerasVersion)
       throws Exception {
     Map<String, Object> layerConfig = new HashMap<>();
-        layerConfig.put(conf.getLAYER_FIELD_CLASS_NAME(), conf.getLAYER_CLASS_NAME_LOCALLY_CONNECTED_2D());
+    layerConfig.put(
+        conf.getLAYER_FIELD_CLASS_NAME(), conf.getLAYER_CLASS_NAME_LOCALLY_CONNECTED_2D());
     Map<String, Object> config = new HashMap<>();
     config.put(conf.getLAYER_FIELD_ACTIVATION(), ACTIVATION_KERAS);
     config.put(conf.getLAYER_FIELD_NAME(), LAYER_NAME);
@@ -97,9 +95,12 @@ public class KerasLocallyConnected2DTest extends BaseDL4JTest {
       config.put(conf.getLAYER_FIELD_NB_ROW(), KERNEL_SIZE[0]);
       config.put(conf.getLAYER_FIELD_NB_COL(), KERNEL_SIZE[1]);
     } else {
-            ArrayList kernel = new ArrayList<Integer>() {{
+      ArrayList kernel =
+          new ArrayList<Integer>() {
+            {
               for (int i : KERNEL_SIZE) add(i);
-            }};
+            }
+          };
       config.put(conf.getLAYER_FIELD_KERNEL_SIZE(), kernel);
     }
 
@@ -112,11 +113,10 @@ public class KerasLocallyConnected2DTest extends BaseDL4JTest {
     layerConfig.put(conf.getLAYER_FIELD_CONFIG(), config);
     layerConfig.put(conf.getLAYER_FIELD_KERAS_VERSION(), kerasVersion);
 
-
     KerasLocallyConnected2D kerasLocal = new KerasLocallyConnected2D(layerConfig);
 
     // once get output type is triggered, inputshape, output shape and input depth are updated
-        kerasLocal.getOutputType(InputType.convolutional(4,4,3));
+    kerasLocal.getOutputType(InputType.convolutional(4, 4, 3));
 
     LocallyConnected2D layer = kerasLocal.getLocallyConnected2DLayer();
     assertEquals(ACTIVATION_DL4J, layer.getActivation().toString().toLowerCase());
@@ -135,4 +135,3 @@ public class KerasLocallyConnected2DTest extends BaseDL4JTest {
     assertEquals(layer.getNIn(), 3);
   }
 }
-

cavis-dnn/cavis-dnn-nn/build.gradle

@@ -18,6 +18,9 @@
  *    *****************************************************************************
  *
  */
+plugins {
+    id("io.freefair.lombok") version "8.0.1"
+}
 apply from: "${project.rootProject.projectDir}/createTestBackends.gradle"
 
 dependencies {

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/ActivationLayer.java

@@ -134,7 +134,7 @@ public class ActivationLayer extends NoParamLayer {
           C extends ActivationLayer, B extends ActivationLayerBuilder<C, B>>
       extends NoParamLayer.NoParamLayerBuilder<C, B> {
     public C build() {
-      C l = this.build();
+      C l = this.initBuild();
       l.initializeConstraints();
       return l;
     }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/BaseLayerConfiguration.java

@@ -46,6 +46,7 @@ import org.nd4j.linalg.learning.regularization.WeightDecay;
 
 /** A neural network layer. */
 @EqualsAndHashCode(callSuper = true)
+@NoArgsConstructor
 @SuperBuilder
 public abstract class BaseLayerConfiguration extends LayerConfiguration
     implements ITraininableLayerConfiguration, Serializable, Cloneable {
@@ -62,7 +63,7 @@ public abstract class BaseLayerConfiguration extends LayerConfiguration
    *
    * @param constraints Constraints to apply to all bias parameters of all layers
    */
-  @lombok.Builder.Default @Getter protected final List<LayerConstraint> biasConstraints = new ArrayList<>();
+  //@lombok.Builder.Default @Getter protected final List<LayerConstraint> biasConstraints = new ArrayList<>();
   /**
    * Set constraints to be applied to all layers. Default: no constraints.<br>
    * Constraints can be used to enforce certain conditions (non-negativity of parameters, max-norm
@@ -392,22 +393,7 @@ public B updater(Updater upd) {
       return weightDecayBias(coefficient, true);
     }
 
-    /**
+
-     * Set constraints to be applied to all layers. Default: no constraints.<br>
-     * Constraints can be used to enforce certain conditions (non-negativity of parameters, max-norm
-     * regularization, etc). These constraints are applied at each iteration, after the parameters
-     * have been updated.<br>
-     * Note: values set by this method will be applied to all applicable layers in the network,
-     * unless a different value is explicitly set on a given layer. In other words: values set via
-     * this method are used as the default value, and can be overridden on a per-layer basis.
-     *
-     * @param constraints Constraints to apply to all bias parameters of all layers
-     */
-    public B constrainBias(LayerConstraint... constraints) {
-      biasConstraints$value = Arrays.asList(constraints);
-      biasConstraints$set = true;
-      return self();
-    }
 
     /**
      * Weight decay for the biases only - see {@link #weightDecay(double)} for more details<br>

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/BaseOutputLayer.java

@@ -32,6 +32,7 @@ import org.nd4j.linalg.lossfunctions.impl.LossMCXENT;
 
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
+@NoArgsConstructor
 @SuperBuilder(builderMethodName = "innerBuilder")
 public abstract class BaseOutputLayer extends FeedForwardLayer {
 

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/Convolution1D.java

@@ -29,6 +29,6 @@ import lombok.experimental.SuperBuilder;
 @Data
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
-@SuperBuilder
+@SuperBuilder(buildMethodName = "initBuild")
 public class Convolution1D extends Convolution1DLayer {
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/Convolution2D.java

@@ -30,6 +30,6 @@ import lombok.experimental.SuperBuilder;
 
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
-@SuperBuilder
+@SuperBuilder(buildMethodName = "initBuild")
 public class Convolution2D extends ConvolutionLayer {
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/ConvolutionLayer.java

@@ -46,10 +46,9 @@ import org.nd4j.linalg.api.ndarray.INDArray;
  * to be used in the net or in other words the channels The builder specifies the filter/kernel
  * size, the stride and padding The pooling layer takes the kernel size
  */
-
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
-@SuperBuilder(buildMethodName = "initBuild", builderMethodName = "innerBuilder")
+@SuperBuilder(builderMethodName = "innerBuilder", buildMethodName = "initBuild")
 public class ConvolutionLayer extends FeedForwardLayer {
   /**
    * Size of the convolution rows/columns
@@ -63,7 +62,8 @@ public class ConvolutionLayer extends FeedForwardLayer {
    * Set the convolution mode for the Convolution layer. See {@link ConvolutionMode} for more
    * details Default is {@link ConvolutionMode}.Truncate.
    */
-  @Builder.Default @Getter @Setter private ConvolutionMode convolutionMode = ConvolutionMode.Truncate;
+  @Builder.Default @Getter @Setter
+  private ConvolutionMode convolutionMode = ConvolutionMode.Truncate;
 
   /**
    * Set the data format for the CNN activations - NCHW (channels first) or NHWC (channels last).
@@ -86,36 +86,35 @@ public class ConvolutionLayer extends FeedForwardLayer {
    * http://deeplearning.net/software/theano/tutorial/conv_arithmetic.html#dilated-convolutions</a>
    * <br>
    */
-  @Getter @Setter
+  @Getter @Setter private @Builder.Default int[] dilation = new int[] {1, 1};
-  private @Builder.Default int[] dilation = new int[] {1, 1};
   /** Default is 2. Down-sample by a factor of 2 */
-  @Getter @Setter
+  @Getter @Setter private @Builder.Default int[] stride = new int[] {1, 1};
-  private @Builder.Default int[] stride = new int[] {1, 1};
+
-@Getter @Setter
+  @Getter @Setter private @Builder.Default int[] padding = new int[] {0, 0};
-  private @Builder.Default int[] padding = new int[] {0, 0};
   /**
    * When using CuDNN and an error is encountered, should fallback to the non-CuDNN implementatation
    * be allowed? If set to false, an exception in CuDNN will be propagated back to the user. If
    * false, the built-in (non-CuDNN) implementation for ConvolutionLayer will be used
    */
-  @Getter
+  @Getter @Setter @Builder.Default private boolean cudnnAllowFallback = true;
-  @Builder.Default private boolean cudnnAllowFallback = true;
 
   /** Defaults to "PREFER_FASTEST", but "NO_WORKSPACE" uses less memory. */
-  @Getter
+  @Getter @Setter @Builder.Default private AlgoMode cudnnAlgoMode = AlgoMode.PREFER_FASTEST;
-  @Builder.Default private AlgoMode cudnnAlgoMode = AlgoMode.PREFER_FASTEST;
 
-  private FwdAlgo cudnnFwdAlgo;
+  @Getter @Setter private FwdAlgo cudnnFwdAlgo;
-  private BwdFilterAlgo cudnnBwdFilterAlgo;
+  @Getter @Setter private BwdFilterAlgo cudnnBwdFilterAlgo;
-  private BwdDataAlgo cudnnBwdDataAlgo;
+  @Getter @Setter private BwdDataAlgo cudnnBwdDataAlgo;
-  @Getter @Setter
+  @Getter @Setter @Builder.Default private int convolutionDim = 2; // 2D convolution by default
-  @Builder.Default private int convolutionDim = 2; // 2D convolution by default
   /** Causal convolution - allowed for 1D only */
   @Builder.Default private boolean allowCausal = false;
 
-  @Builder.Default @JsonIgnore @EqualsAndHashCode.Exclude
+  @Builder.Default @JsonIgnore @EqualsAndHashCode.Exclude @Getter @Setter
   private boolean defaultValueOverriden = false;
 
+  public static ConvolutionLayerBuilder<?, ?> builder() {
+    return innerBuilder();
+  }
+
   public static ConvolutionLayerBuilder<?, ?> builder(int... kernelSize) {
     return innerBuilder().kernelSize(kernelSize);
   }
@@ -435,7 +434,7 @@ public class ConvolutionLayer extends FeedForwardLayer {
                 + Arrays.toString(dilation$value));
       }
 
-      C l = this.initBuild();
+      C l = initBuild();
       l.setType(LayerType.CONV);
       l.initializeConstraints();
       return l;

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/DenseLayer.java

@@ -23,7 +23,6 @@ package org.deeplearning4j.nn.conf.layers;
 import java.util.Collection;
 import java.util.Map;
 import lombok.*;
-import lombok.experimental.Accessors;
 import lombok.experimental.SuperBuilder;
 import org.deeplearning4j.nn.api.Layer;
 import org.deeplearning4j.nn.api.ParamInitializer;
@@ -41,9 +40,7 @@ import org.nd4j.linalg.api.ndarray.INDArray;
 @Data
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
-@SuperBuilder(
+@SuperBuilder
-    buildMethodName =
-        "initBuild") // we do this to define build() ourselves and run custom init code
 public class DenseLayer extends FeedForwardLayer {
 
   /** If true (default = false): enable layer normalization on this layer */
@@ -121,13 +118,17 @@ public class DenseLayer extends FeedForwardLayer {
         .build();
   }
 
-  public static abstract class DenseLayerBuilder<C extends DenseLayer,
+  public abstract static class DenseLayerBuilder<
-          B extends DenseLayerBuilder<C, B>> extends FeedForwardLayerBuilder<C, B>{
+          C extends DenseLayer, B extends DenseLayerBuilder<C, B>>
+      extends FeedForwardLayerBuilder<C, B> {
 
-    public C build() {
+  }
-      C l = this.initBuild();
+  private static final class DenseLayerBuilderImpl extends DenseLayerBuilder<DenseLayer, DenseLayerBuilderImpl> {
+    public DenseLayer build() {
+      DenseLayer l = new DenseLayer(this);
       l.initializeConstraints();
       return l;
     }
   }
-}
+
+  }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/FeedForwardLayer.java

@@ -20,10 +20,7 @@
 
 package org.deeplearning4j.nn.conf.layers;
 
-import lombok.EqualsAndHashCode;
+import lombok.*;
-import lombok.Getter;
-import lombok.Setter;
-import lombok.ToString;
 import lombok.experimental.SuperBuilder;
 import org.deeplearning4j.nn.conf.DataFormat;
 import org.deeplearning4j.nn.conf.InputPreProcessor;
@@ -34,12 +31,12 @@ import org.deeplearning4j.nn.conf.preprocessor.RnnToFeedForwardPreProcessor;
 
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
+@NoArgsConstructor
 @SuperBuilder
 public abstract class FeedForwardLayer extends BaseLayerConfiguration {
     public static abstract class FeedForwardLayerBuilder<C extends FeedForwardLayer, B extends FeedForwardLayerBuilder<C, B>>
     extends BaseLayerConfigurationBuilder<C, B> {
-
+}
-    }
     /**
      * Number of inputs for the layer (usually the size of the last layer). <br> Note that for Convolutional layers,
      * this is the input channels, otherwise is the previous layer size.

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/GlobalPoolingLayer.java

@@ -55,8 +55,7 @@ public class GlobalPoolingLayer extends NoParamLayer {
          * @param poolingDimensions Pooling dimensions to use
          */
         public B poolingDimensions(int... poolingDimensions) {
-            poolingDimensions$value = poolingDimensions;
+            this.poolingDimensions = poolingDimensions;
-            poolingDimensions$set = true;
             return self();
         }
 
@@ -85,7 +84,7 @@ public class GlobalPoolingLayer extends NoParamLayer {
      * width) Default for CNN3D data: pooling dimensions 2,3,4 (depth, height and width)
      *
      */
-    @Builder.Default private int[] poolingDimensions;
+    private int[] poolingDimensions;
     /**
      * P-norm constant. Only used if using {@link PoolingType#PNORM} for the pooling type
      *

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/LSTM.java

@@ -49,8 +49,8 @@ public class LSTM extends AbstractLSTM {
     private double forgetGateBiasInit;
 
     public static abstract class LSTMBuilder<C extends LSTM, B extends LSTMBuilder<C, B>> extends AbstractLSTMBuilder<C, B> {
-        public C build() {
+        @Override public C build() {
-            C l = this.build();
+            C l = this.initBuild();
             l.initializeConstraints();
             return l;
         }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/LayerConfiguration.java

@@ -48,8 +48,9 @@ import org.nd4j.linalg.learning.config.IUpdater;
 import org.nd4j.linalg.learning.regularization.Regularization;
 
 /** A neural network layer. */
-//@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class")
+@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class")
 @EqualsAndHashCode
+@NoArgsConstructor
 // @JsonIdentityInfo(generator= ObjectIdGenerators.IntSequenceGenerator.class, property="@id")
 @Slf4j
 @SuperBuilder
@@ -327,13 +328,41 @@ public abstract class LayerConfiguration
 
   public abstract static class LayerConfigurationBuilder<
       C extends LayerConfiguration, B extends LayerConfigurationBuilder<C, B>> {
+
     public B dropOut(double d) {
       this.dropOut(new Dropout(d));
       return self();
     }
+
     public B dropOut(IDropout d) {
       this.dropOut = d;
       return self();
     }
+
+    /**
+     * Set constraints to be applied to all layers. Default: no constraints.<br>
+     * Constraints can be used to enforce certain conditions (non-negativity of parameters, max-norm
+     * regularization, etc). These constraints are applied at each iteration, after the parameters
+     * have been updated.<br>
+     * Note: values set by this method will be applied to all applicable layers in the network,
+     * unless a different value is explicitly set on a given layer. In other words: values set via
+     * this method are used as the default value, and can be overridden on a per-layer basis.
+     *
+     * @param constraints Constraints to apply to all bias parameters of all layers
+     */
+    public B constrainBias(LayerConstraint... constraints) {
+      biasConstraints = Arrays.asList(constraints);
+      return self();
+    }
+
+    /**
+     * we are doing this to avoid BUG https://github.com/projectlombok/lombok/issues/3419 as some
+     * child classes may specify their own buildMethodName in @SuperBuilder, but we use only
+     * "initBuild" here consequently
+     * @return
+     */
+    public C initBuild() {
+      return build();
+    }
   }
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/Pooling1D.java

@@ -24,6 +24,7 @@ import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import lombok.ToString;
+import lombok.experimental.SuperBuilder;
 
 /**
  * 1D Pooling (subsampling) layer. Equivalent to {@link Subsampling1DLayer}
@@ -31,8 +32,9 @@ import lombok.ToString;
  *  Supports the following pooling types: MAX, AVG, SUM, PNORM, NONE
  * @author Max Pumperla
  */
-@Data
+
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
+@SuperBuilder(buildMethodName = "initBuild")
 public class Pooling1D extends Subsampling1DLayer {
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/Pooling2D.java

@@ -24,6 +24,7 @@ import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import lombok.ToString;
+import lombok.experimental.SuperBuilder;
 
 /**
  * 2D Pooling (subsampling) layer. Equivalent to {@link SubsamplingLayer}
@@ -31,8 +32,9 @@ import lombok.ToString;
  *  Supports the following pooling types: MAX, AVG, SUM, PNORM, NONE
  * @author Max Pumperla
  */
-@Data
+
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
+@SuperBuilder(buildMethodName = "initBuild")
 public class Pooling2D extends SubsamplingLayer {
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/Subsampling1DLayer.java

@@ -47,7 +47,7 @@ import org.nd4j.linalg.api.ndarray.INDArray;
  * channels deep). The kernel should be H<L pixels high and W=1 pixels
  * wide.
  */
-@Data
+
 @ToString(callSuper = true)
 @EqualsAndHashCode(callSuper = true)
 @SuperBuilder(buildMethodName = "initBuild")

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/SubsamplingLayer.java

@@ -53,7 +53,7 @@ public class SubsamplingLayer extends NoParamLayer {
    * Only conv1d/subsampling1d can use causal mode
    */
   @Builder.Default
-  @Accessors protected boolean allowCausal = false;
+  protected boolean allowCausal = false;
   /**
    * Set the convolution mode for the Convolution layer. See {@link ConvolutionMode} for more
    * details

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/objdetect/Yolo2OutputLayer.java

@@ -78,7 +78,7 @@ public class Yolo2OutputLayer extends LayerConfiguration {
    */
   @JsonSerialize(using = NDArrayTextSerializer.class)
   @JsonDeserialize(using = BoundingBoxesDeserializer.class)
-  @Builder.Default @Getter
+  @Getter
   private INDArray boundingBoxes;
 
   @Builder.Default @Getter
@@ -165,14 +165,14 @@ public class Yolo2OutputLayer extends LayerConfiguration {
           C extends Yolo2OutputLayer, B extends Yolo2OutputLayerBuilder<C, B>>
       extends LayerConfigurationBuilder<C, B> {
     public C build() {
-      if (boundingBoxes$value == null) {
+      if (boundingBoxes == null) {
         throw new IllegalStateException("Bounding boxes have not been set");
       }
 
-      if (boundingBoxes$value.rank() != 2 || boundingBoxes$value.size(1) != 2) {
+      if (boundingBoxes.rank() != 2 || boundingBoxes.size(1) != 2) {
         throw new IllegalStateException(
             "Bounding box priors must have shape [nBoxes, 2]. Has shape: "
-                + Arrays.toString(boundingBoxes$value.shape()));
+                + Arrays.toString(boundingBoxes.shape()));
       }
       return initBuild();
     }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/recurrent/LastTimeStep.java

@@ -21,6 +21,7 @@
 package org.deeplearning4j.nn.conf.layers.recurrent;
 
 import lombok.experimental.SuperBuilder;
+import org.deeplearning4j.nn.api.Layer;
 import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
 import org.deeplearning4j.nn.conf.inputs.InputType;
 import org.deeplearning4j.nn.conf.layers.LayerConfiguration;
@@ -45,6 +46,12 @@ public class LastTimeStep extends BaseWrapperLayerConfiguration {
                 .name(underlying.getName());
     }
 
+    public static LastTimeStepBuilder<?,?> builder(Layer underlying) {
+        return innerBuilder()
+                .underlying(underlying.getLayerConfiguration())
+                .name(underlying.getLayerConfiguration().getName());
+    }
+
     public LayerConfiguration getUnderlying() {
         return underlying;
     }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/samediff/AbstractSameDiffLayer.java

@@ -49,6 +49,7 @@ import org.nd4j.linalg.learning.regularization.WeightDecay;
 
 @Slf4j
 @EqualsAndHashCode(callSuper = true, doNotUseGetters = true)
+@NoArgsConstructor
 @SuperBuilder
 public abstract class AbstractSameDiffLayer extends LayerConfiguration {
 

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/samediff/SameDiffLambdaLayer.java

@@ -28,6 +28,7 @@ import org.nd4j.autodiff.samediff.SameDiff;
 import org.nd4j.linalg.api.ndarray.INDArray;
 
 import java.util.Map;
+@NoArgsConstructor
 @SuperBuilder
 public abstract class SameDiffLambdaLayer extends SameDiffLayer {
 

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/samediff/SameDiffLayer.java

@@ -21,7 +21,9 @@
 package org.deeplearning4j.nn.conf.layers.samediff;
 
 import lombok.Builder;
+import lombok.Data;
 import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
 import lombok.experimental.SuperBuilder;
 import org.deeplearning4j.nn.api.Layer;
 import org.deeplearning4j.nn.api.MaskState;
@@ -42,6 +44,8 @@ import java.util.Map;
 
 
 @EqualsAndHashCode(callSuper = true)
+@Data
+@NoArgsConstructor
 @SuperBuilder
 public abstract class SameDiffLayer extends AbstractSameDiffLayer {
 
@@ -97,8 +101,4 @@ public abstract class SameDiffLayer extends AbstractSameDiffLayer {
         ret.setLayerConfiguration(lconf);
         return ret;
     }
-
-    public static abstract class SameDiffLayerBuilder<C extends SameDiffLayer, B extends SameDiffLayerBuilder<C, B>> extends AbstractSameDiffLayerBuilder<C,B> {
-
-    }
 }

cavis-dnn/cavis-dnn-nn/src/main/java/org/deeplearning4j/nn/conf/layers/samediff/SameDiffOutputLayer.java

@@ -20,6 +20,7 @@
 
 package org.deeplearning4j.nn.conf.layers.samediff;
 
+import lombok.NoArgsConstructor;
 import lombok.experimental.SuperBuilder;
 import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
 import org.deeplearning4j.nn.conf.layers.LayerConfiguration;
@@ -31,6 +32,7 @@ import org.nd4j.linalg.api.ndarray.INDArray;
 
 import java.util.Collection;
 import java.util.Map;
+@NoArgsConstructor
 @SuperBuilder
 public abstract class SameDiffOutputLayer extends AbstractSameDiffLayer {
 

cavis-ui/cavis-ui-common/src/test/java/org/deeplearning4j/ui/ManualTests.java

@@ -323,12 +323,12 @@ public class ManualTests {
                 .l2(0.0005)
                 .weightInit(WeightInit.XAVIER)
                 .updater(new Nesterovs(0.01, 0.9))
-                .layer(0, new FrozenLayer(ConvolutionLayer.builder(5, 5)
+                .layer(0, FrozenLayer.builder(ConvolutionLayer.builder(5, 5)
                         //nIn and nOut specify depth. nIn here is the nChannels and nOut is the number of filters to be applied
                         .nIn(nChannels).stride(1, 1).nOut(20).activation(Activation.IDENTITY).build()))
-                .layer(1, new FrozenLayer(SubsamplingLayer.builder(SubsamplingLayer.PoolingType.MAX).kernelSize(2, 2)
+                .layer(1, FrozenLayer.builder(SubsamplingLayer.builder(SubsamplingLayer.PoolingType.MAX).kernelSize(2, 2)
                         .stride(2, 2).build()))
-                .layer(2, new FrozenLayer(DenseLayer.builder().activation(Activation.RELU).nOut(500).build()))
+                .layer(2, FrozenLayer.builder(DenseLayer.builder().activation(Activation.RELU).nOut(500).build()))
                 .layer(3, OutputLayer.builder(LossFunctions.LossFunction.NEGATIVELOGLIKELIHOOD)
                         .nOut(outputNum).activation(Activation.SOFTMAX).build())
                 .inputType(InputType.convolutionalFlat(28, 28, nChannels));