Add jenkinsfile for pipeline build and dockerfile for build

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

cavis-datavec/dvec-api/src/main/java/net/brutex/cavis/dvec/api/FieldInterface.java

@@ -0,0 +1,79 @@
+/*
+ *
+ *    ******************************************************************************
+ *    *
+ *    * This program and the accompanying materials are made available under the
+ *    * terms of the Apache License, Version 2.0 which is available at
+ *    * https://www.apache.org/licenses/LICENSE-2.0.
+ *    *
+ *    *  See the NOTICE file distributed with this work for additional
+ *    *  information regarding copyright ownership.
+ *    * Unless required by applicable law or agreed to in writing, software
+ *    * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *    * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ *    * License for the specific language governing permissions and limitations
+ *    * under the License.
+ *    *
+ *    * SPDX-License-Identifier: Apache-2.0
+ *    *****************************************************************************
+ *
+ */
+
+package net.brutex.cavis.dvec.api;
+
+import java.io.Serializable;
+import java.nio.Buffer;
+import java.nio.LongBuffer;
+import java.util.List;
+import net.brutex.cavis.dvec.api.exceptions.DVecException;
+
+/**
+ * A Field can be considered a "column" in a {@code Record}, as such a Field may refer to multiple
+ * entries of that "column". Fields are typed as Buffers. Some of them defined in the dvec core api,
+ * other (i.e. Image or Arrow) require dvec extensions accordingly.
+ *
+ * @author Brian Rosenberger
+ * @since 1.0
+ */
+public interface FieldInterface<T extends Buffer> extends Serializable {
+
+  /**
+   * Get a reference to the metadata for this Field.
+   *
+   * @return the {@link FieldMetadata}
+   */
+  FieldMetadata getFieldMetadata();
+
+  /**
+   * Get the 1st field as Buffer. This deserializes the data from the underlying storage.
+   *
+   * @return T underlying Buffer
+   */
+  default T read() throws DVecException {
+    return read(0, 1);
+  }
+
+  /**
+   * Get a range of fields as a {@code Buffer}
+   *
+   * @param start  Index of starting position, zero based
+   * @param length how many fields to read
+   * @return the buffers
+   */
+  T read(long start, long length) throws DVecException;
+
+  /**
+   * Write the data into the underlying storage.
+   */
+  default void write(T buffer) {
+    write(0, buffer);
+  }
+
+  /**
+   * Write the data into the underyling storage starting at a position
+   *
+   * @param pos the position to start
+   */
+  void write(long pos, T buffer);
+
+}