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.tools.clusterquantiser;
031
032import java.util.Arrays;
033import java.util.Iterator;
034
035/**
036 * A feature file held in memory
037 * 
038 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
039 */
040public class MemoryFeatureFile extends FeatureFile {
041        private String[] locations;
042        private byte[][] data;
043        
044        /**
045         * Construct with the given data
046         * @param data
047         * @param locations
048         */
049        public MemoryFeatureFile(byte[][]data, String[] locations){
050                this.data = data;
051                this.locations = locations;
052        }
053        
054        @Override
055        public Iterator<FeatureFileFeature> iterator() {
056                // TODO Auto-generated method stub
057                return new Iterator<FeatureFileFeature>(){
058
059                        int total = 0;
060                        @Override
061                        public boolean hasNext() {
062                                return total < data.length;
063                        }
064
065                        @Override
066                        public FeatureFileFeature next() {
067                                FeatureFileFeature f = new FeatureFileFeature();
068                                f.data = data[total];
069                                f.location = locations[total];
070                                total++;
071                                return f;
072                        }
073
074                        @Override
075                        public void remove() {
076                                Arrays.asList(data).remove(total-1);
077                                Arrays.asList(locations).remove(total-1);
078                        }
079                        
080                };
081        }
082        @Override
083        public int size() {
084                // TODO Auto-generated method stub
085                return this.data.length;
086        }
087        
088        @Override
089        public FeatureFileFeature get(int index){
090                FeatureFileFeature fff = new FeatureFileFeature ();
091                fff.data = this.data[index];
092                fff.location = this.locations[index];
093                return fff;
094        }
095        
096        @Override
097        public void close(){
098                data= null;
099                locations = null;
100        }
101
102}