001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.ml.linear.data;
031
032import gov.sandia.cognition.math.matrix.Matrix;
033import java.io.File;
034import java.io.IOException;
035import java.util.Map;
036
037import org.openimaj.math.matrix.CFMatrixUtils;
038import org.openimaj.util.pair.Pair;
039
040import com.jmatio.io.MatFileReader;
041import com.jmatio.types.MLArray;
042import com.jmatio.types.MLCell;
043
044public class MatlabFileDataGenerator implements MatrixDataGenerator<Matrix>{
045        private MLCell data;
046        private int index;
047
048        public MatlabFileDataGenerator(File matfile) throws IOException {
049                MatFileReader reader = new MatFileReader(matfile);
050                Map<String, MLArray> content = reader.getContent();
051                this.data= (MLCell) content.get("XYs");
052                this.index = 0;
053        }
054
055        @Override
056        public Pair<Matrix> generate() {
057                if(index>=this.data.getM())return null;
058                Pair<Matrix> XY = new Pair<Matrix>(
059                                CFMatrixUtils.asMat(this.data.get(index, 0)),
060                                CFMatrixUtils.asMat(this.data.get(index, 1))
061                );
062                index++;
063                return XY;
064        }
065
066        
067
068        public int size() {
069                return this.data.getM();
070        }
071        
072}