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.experiment.gmm.retrieval;
031
032import java.io.IOException;
033import java.util.ArrayList;
034import java.util.Iterator;
035import java.util.List;
036
037import org.apache.commons.vfs2.FileObject;
038import org.apache.commons.vfs2.FileSystemException;
039import org.apache.commons.vfs2.FileSystemManager;
040import org.apache.commons.vfs2.VFS;
041import org.openimaj.data.dataset.ReadableListDataset;
042import org.openimaj.data.identity.Identifiable;
043import org.openimaj.image.Image;
044import org.openimaj.io.ObjectReader;
045
046/**
047 *
048 * @param <IMAGE>
049 * @author Sina Samangooei (ss@ecs.soton.ac.uk)
050 */
051public class UKBenchListDataset<IMAGE> extends ReadableListDataset<IMAGE, FileObject> implements Identifiable{
052        private int object;
053        private List<String> ids;
054        private FileObject base;
055        
056        /**
057         * @param path
058         * @param reader
059         * @param object
060         */
061        public UKBenchListDataset(String path, ObjectReader<IMAGE, FileObject> reader, int object) {
062                super(reader);
063                this.object = object;
064                this.ids = heldIDs();
065                FileSystemManager fsManager;
066                try {
067                        fsManager = VFS.getManager();
068                        this.base = fsManager.resolveFile(path);
069                } catch (FileSystemException e) {
070                        throw new RuntimeException(e);
071                }
072        }
073        @Override
074        public IMAGE getInstance(int index) {
075                FileObject fo = null; 
076                try {
077                        fo = createFileObject(this.ids.get(index));
078                        return this.reader.read(fo);
079                } catch (IOException e) {
080                        throw new RuntimeException(e);
081                } finally {
082                        if(fo!=null){
083                                try {
084                                        fo.close();
085                                } catch (FileSystemException e) {
086                                        throw new RuntimeException(e);
087                                }
088                        }
089                }
090        }
091
092        private FileObject createFileObject(String string) {
093                try {
094                        FileObject child = base.getChild(string);
095                        return child;
096                } catch (FileSystemException e) {
097                        throw new RuntimeException(e);
098                }
099        }
100        @Override
101        public int numInstances() {
102                return  4;
103        }
104
105        @Override
106        public String getID() {
107                List<String> ids = heldIDs();
108                return String.format("UKBench{%s}",ids.toString());
109        }
110        private List<String> heldIDs() {
111                List<String> ids = new ArrayList<String>();
112                ids.add(String.format("ukbench%05d.jpg",object * 4 + 0));
113                ids.add(String.format("ukbench%05d.jpg",object * 4 + 1));
114                ids.add(String.format("ukbench%05d.jpg",object * 4 + 2));
115                ids.add(String.format("ukbench%05d.jpg",object * 4 + 3));
116                return ids;
117        }
118        /**
119         * @return the objects this group represents
120         */
121        public int getObject() {
122                return object;
123        }
124        
125        
126
127}