001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.image;
016    
017    import com.liferay.portal.kernel.exception.PortalException;
018    import com.liferay.portal.kernel.exception.SystemException;
019    import com.liferay.portal.kernel.util.FileUtil;
020    import com.liferay.portal.kernel.util.StringBundler;
021    import com.liferay.portal.kernel.util.StringPool;
022    import com.liferay.portal.model.Image;
023    import com.liferay.portal.util.PropsValues;
024    import com.liferay.portlet.documentlibrary.NoSuchFileException;
025    
026    import java.io.File;
027    import java.io.FileInputStream;
028    import java.io.IOException;
029    import java.io.InputStream;
030    
031    /**
032     * @author Jorge Ferrer
033     */
034    public class FileSystemHook extends BaseHook {
035    
036            public FileSystemHook() throws IOException {
037                    _rootDir = new File(PropsValues.IMAGE_HOOK_FILE_SYSTEM_ROOT_DIR);
038    
039                    FileUtil.mkdirs(_rootDir);
040            }
041    
042            @Override
043            public void deleteImage(Image image) {
044                    File file = getFile(image.getImageId(), image.getType());
045    
046                    FileUtil.delete(file);
047            }
048    
049            @Override
050            public byte[] getImageAsBytes(Image image)
051                    throws PortalException, SystemException {
052    
053                    try {
054                            File file = getFile(image.getImageId(), image.getType());
055    
056                            if (!file.exists()) {
057                                    throw new NoSuchFileException(file.getPath());
058                            }
059    
060                            return FileUtil.getBytes(file);
061                    }
062                    catch (IOException ioe) {
063                            throw new SystemException(ioe);
064                    }
065            }
066    
067            @Override
068            public InputStream getImageAsStream(Image image)
069                    throws PortalException, SystemException {
070    
071                    try {
072                            File file = getFile(image.getImageId(), image.getType());
073    
074                            if (!file.exists()) {
075                                    throw new NoSuchFileException(file.getPath());
076                            }
077    
078                            return new FileInputStream(file);
079                    }
080                    catch (IOException ioe) {
081                            throw new SystemException(ioe);
082                    }
083            }
084    
085            @Override
086            public void updateImage(Image image, String type, byte[] bytes)
087                    throws SystemException {
088    
089                    try {
090                            File file = getFile(image.getImageId(), type);
091    
092                            FileUtil.write(file, bytes);
093                    }
094                    catch (IOException ioe) {
095                            throw new SystemException(ioe);
096                    }
097            }
098    
099            protected String buildPath(String fileNameFragment) {
100                    int fileNameFragmentLength = fileNameFragment.length();
101    
102                    if (fileNameFragmentLength <= 2) {
103                            return StringPool.BLANK;
104                    }
105    
106                    StringBundler sb = new StringBundler(
107                            fileNameFragmentLength / 2 + fileNameFragmentLength);
108    
109                    for (int i = 0; i < fileNameFragmentLength; i += 2) {
110                            if ((i + 2) < fileNameFragmentLength) {
111                                    sb.append(StringPool.SLASH);
112                                    sb.append(fileNameFragment.substring(i, i + 2));
113                            }
114                    }
115    
116                    return sb.toString();
117            }
118    
119            protected File getFile(long imageId, String type) {
120                    String path = buildPath(String.valueOf(imageId));
121    
122                    return new File(
123                            _rootDir + StringPool.SLASH + path + StringPool.SLASH +
124                                    imageId + StringPool.PERIOD + type);
125            }
126    
127            private File _rootDir;
128    
129    }