/*******************************************************************************
 * Copyright (c) 2015-2018 Skymind, Inc.
 *
 * 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.
 *
 * 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 org.nd4j.linalg.dataset.api.preprocessor;

import java.io.Serializable;

/**
 * Abstract base class for normalizers for both DataSet and MultiDataSet processing
 *
 * @author Ede Meijer
 */
public abstract class AbstractNormalizer implements Serializable {
    protected abstract boolean isFit();

    void assertIsFit() {
        if (!isFit()) {
            throw new RuntimeException(
                            "API_USE_ERROR: Preprocessors have to be explicitly fit before use. Usage: .fit(dataset) or .fit(datasetiterator)");
        }
    }
}
