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/*
 *
 *  *
 *  *  * Copyright 2015 Skymind,Inc.
 *  *  *
 *  *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *  *    you may not use this file except in compliance with the License.
 *  *  *    You may obtain a copy of the License at
 *  *  *
 *  *  *        http://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.
 *  *
 *
 */

package org.canova.common;

import org.canova.api.writable.Writable;
import org.canova.common.data.NDArrayWritable;
import org.nd4j.linalg.api.ndarray.INDArray;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

/**
 * @author Adam Gibson
 */
public class RecordConverter {
    private RecordConverter() {}

    /**
     * Convert a record to an ndarray
     * @param record the record to convert
     * @return the array
     */
    public static INDArray toArray(Collection record) {
        Iterator writables = record.iterator();
        while(writables.hasNext()) {
            Writable w = writables.next();
            if (w instanceof NDArrayWritable) {
                return ((NDArrayWritable)w).get();
            }
        }
        return null;
    }
    /**
     * Convert an ndarray to a record
     * @param array the array to convert
     * @return the record
     */
    public static Collection toRecord(INDArray array) {
        Collection writables = new ArrayList<>();
        writables.add(new NDArrayWritable(array));
        return writables;
    }

}