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.kernel.util;
016    
017    import com.liferay.portal.kernel.security.pacl.permission.PortalRuntimePermission;
018    
019    import java.io.File;
020    import java.io.InputStream;
021    
022    import java.util.Set;
023    
024    /**
025     * @author Jorge Ferrer
026     * @author Brian Wing Shun Chan
027     * @author Alexander Chow
028     */
029    public class MimeTypesUtil {
030    
031            /**
032             * Returns the content type from the file.
033             *
034             * @param  file the file of the content
035             * @return the content type if it is a supported format or
036             *         "application/octet-stream" if it is an unsupported format
037             */
038            public static String getContentType(File file) {
039                    return getMimeTypes().getContentType(file);
040            }
041    
042            /**
043             * Returns the content type from the file and file name.
044             *
045             * @param  file the file of the content (optionally <code>null</code>)
046             * @param  fileName the full name or extension of the file (e.g.,
047             *         "Test.doc", ".doc")
048             * @return the content type if it is a supported format or
049             *         "application/octet-stream" if it is an unsupported format
050             */
051            public static String getContentType(File file, String fileName) {
052                    return getMimeTypes().getContentType(file, fileName);
053            }
054    
055            /**
056             * Returns the content type from the input stream and file name.
057             *
058             * <p>
059             * The input stream is not reset upon return of this method. This needs to
060             * be handled by the caller if the input stream is to be reused.
061             * Alternatively, use the method {@link #getContentType(File, String)}.
062             * </p>
063             *
064             * @param  inputStream the input stream of the content (optionally
065             *         <code>null</code>)
066             * @param  fileName the full name or extension of the file (e.g.,
067             *         "Test.doc", ".doc")
068             * @return the content type if it is a supported format or
069             *         "application/octet-stream" if it is an unsupported format
070             */
071            public static String getContentType(
072                    InputStream inputStream, String fileName) {
073    
074                    return getMimeTypes().getContentType(inputStream, fileName);
075            }
076    
077            /**
078             * Returns the content type from the file name.
079             *
080             * @param  fileName the full name or extension of the file (e.g.,
081             *         "Test.doc", ".doc")
082             * @return the content type if it is a supported format or
083             *         "application/octet-stream" if it is an unsupported format
084             */
085            public static String getContentType(String fileName) {
086                    return getMimeTypes().getContentType(fileName);
087            }
088    
089            /**
090             * Returns the content type from the file extension.
091             *
092             * @param  extension the extension of the file (e.g., "doc")
093             * @return the content type if it is a supported format or
094             *         "application/octet-stream" if it is an unsupported format
095             */
096            public static String getExtensionContentType(String extension) {
097                    return getMimeTypes().getExtensionContentType(extension);
098            }
099    
100            /**
101             * Returns the possible file extensions for the content type.
102             *
103             * @param  contentType the content type of the file (e.g., "image/jpeg")
104             * @return the set of extensions if it is a known content type or an empty
105             *         set if it is an unknown content type
106             */
107            public static Set<String> getExtensions(String contentType) {
108                    return getMimeTypes().getExtensions(contentType);
109            }
110    
111            public static MimeTypes getMimeTypes() {
112                    PortalRuntimePermission.checkGetBeanProperty(MimeTypesUtil.class);
113    
114                    return _mimeTypes;
115            }
116    
117            public static boolean isWebImage(String mimeType) {
118                    return getMimeTypes().isWebImage(mimeType);
119            }
120    
121            public void setMimeTypes(MimeTypes mimeTypes) {
122                    PortalRuntimePermission.checkSetBeanProperty(getClass());
123    
124                    _mimeTypes = mimeTypes;
125            }
126    
127            private static MimeTypes _mimeTypes;
128    
129    }