001    /**
002     * Copyright (c) 2000-present 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.exception.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) throws PortalException {
051                    try {
052                            File file = getFile(image.getImageId(), image.getType());
053    
054                            if (!file.exists()) {
055                                    throw new NoSuchFileException(file.getPath());
056                            }
057    
058                            return FileUtil.getBytes(file);
059                    }
060                    catch (IOException ioe) {
061                            throw new SystemException(ioe);
062                    }
063            }
064    
065            @Override
066            public InputStream getImageAsStream(Image image) throws PortalException {
067                    try {
068                            File file = getFile(image.getImageId(), image.getType());
069    
070                            if (!file.exists()) {
071                                    throw new NoSuchFileException(file.getPath());
072                            }
073    
074                            return new FileInputStream(file);
075                    }
076                    catch (IOException ioe) {
077                            throw new SystemException(ioe);
078                    }
079            }
080    
081            @Override
082            public void updateImage(Image image, String type, byte[] bytes) {
083                    try {
084                            File file = getFile(image.getImageId(), type);
085    
086                            FileUtil.write(file, bytes);
087                    }
088                    catch (IOException ioe) {
089                            throw new SystemException(ioe);
090                    }
091            }
092    
093            protected String buildPath(String fileNameFragment) {
094                    int fileNameFragmentLength = fileNameFragment.length();
095    
096                    if (fileNameFragmentLength <= 2) {
097                            return StringPool.BLANK;
098                    }
099    
100                    StringBundler sb = new StringBundler(
101                            fileNameFragmentLength / 2 + fileNameFragmentLength);
102    
103                    for (int i = 0; i < fileNameFragmentLength; i += 2) {
104                            if ((i + 2) < fileNameFragmentLength) {
105                                    sb.append(StringPool.SLASH);
106                                    sb.append(fileNameFragment.substring(i, i + 2));
107                            }
108                    }
109    
110                    return sb.toString();
111            }
112    
113            protected File getFile(long imageId, String type) {
114                    String path = buildPath(String.valueOf(imageId));
115    
116                    return new File(
117                            _rootDir + StringPool.SLASH + path + StringPool.SLASH +
118                                    imageId + StringPool.PERIOD + type);
119            }
120    
121            private final File _rootDir;
122    
123    }