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91eb2644ad
125781 rmunteanu: Merged 5.1.N (5.1.2) to 5.2.N (5.2.1)
125603 rmunteanu: Merged 5.1.1 (5.1.1) to 5.1.N (5.1.2)
125484 slanglois: MNT-16155 Update source headers - remove old Copyrights from Java and JSP dource files
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@127808 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
114 lines
4.1 KiB
Java
114 lines
4.1 KiB
Java
package org.alfresco.repo.content.metadata;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.Map;
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import org.alfresco.repo.content.MimetypeMap;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.tika.config.TikaConfig;
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import org.apache.tika.metadata.Metadata;
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import org.apache.tika.metadata.TIFF;
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import org.apache.tika.mime.MediaType;
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import org.apache.tika.parser.AutoDetectParser;
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import org.apache.tika.parser.Parser;
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/**
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* A Metadata Extractor which makes use of the Apache
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* Tika auto-detection to select the best parser
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* to extract the metadata from your document.
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* This will be used for all files which Tika can
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* handle, but where no other more explicit
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* extractor is defined.
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* <pre>
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* <b>author:</b> -- cm:author
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* <b>title:</b> -- cm:title
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* <b>subject:</b> -- cm:description
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* <b>created:</b> -- cm:created
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* <b>comments:</b>
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* <p>geo:lat:</b> -- cm:latitude
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* <p>geo:long:</b> -- cm:longitude
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* </pre>
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*
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* @since 3.4
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* @author Nick Burch
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*/
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public class TikaAutoMetadataExtracter extends TikaPoweredMetadataExtracter
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{
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protected static Log logger = LogFactory.getLog(TikaAutoMetadataExtracter.class);
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private static AutoDetectParser parser;
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private static TikaConfig config;
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private static String EXIF_IMAGE_HEIGHT_TAG = "Exif Image Height";
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private static String EXIF_IMAGE_WIDTH_TAG = "Exif Image Width";
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private static String JPEG_IMAGE_HEIGHT_TAG = "Image Height";
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private static String JPEG_IMAGE_WIDTH_TAG = "Image Width";
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public static ArrayList<String> SUPPORTED_MIMETYPES;
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private static ArrayList<String> buildMimeTypes(TikaConfig tikaConfig)
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{
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config = tikaConfig;
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parser = new AutoDetectParser(config);
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SUPPORTED_MIMETYPES = new ArrayList<String>();
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for(MediaType mt : parser.getParsers().keySet())
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{
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// Add the canonical mime type
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SUPPORTED_MIMETYPES.add( mt.toString() );
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// And add any aliases of the mime type too - Alfresco uses some
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// non canonical forms of various mimetypes, so we need all of them
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for(MediaType alias : config.getMediaTypeRegistry().getAliases(mt))
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{
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SUPPORTED_MIMETYPES.add( alias.toString() );
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}
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}
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return SUPPORTED_MIMETYPES;
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}
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public TikaAutoMetadataExtracter(TikaConfig tikaConfig)
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{
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super( buildMimeTypes(tikaConfig) );
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}
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/**
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* Does auto-detection to select the best Tika
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* Parser.
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*/
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@Override
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protected Parser getParser()
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{
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return parser;
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}
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/**
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* Because some editors use JPEG_IMAGE_HEIGHT_TAG when
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* saving JPEG images , a more reliable source for
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* image size are the values provided by Tika
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* and not the exif/tiff metadata read from the file
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* This will override the tiff:Image size
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* which gets embedded into the alfresco node properties
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* for jpeg files that contain such exif information
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*/
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@Override
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protected Map<String, Serializable> extractSpecific(Metadata metadata,
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Map<String, Serializable> properties, Map<String,String> headers)
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{
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if(MimetypeMap.MIMETYPE_IMAGE_JPEG.equals(metadata.get(Metadata.CONTENT_TYPE)))
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{
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//check if the image has exif information
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if(metadata.get(EXIF_IMAGE_WIDTH_TAG) != null && metadata.get(EXIF_IMAGE_HEIGHT_TAG) != null )
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{
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//replace the exif size properties that will be embedded in the node with
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//the guessed dimensions from Tika
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putRawValue(TIFF.IMAGE_LENGTH.getName(), extractSize(metadata.get(JPEG_IMAGE_HEIGHT_TAG)), properties);
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putRawValue(TIFF.IMAGE_WIDTH.getName(), extractSize(metadata.get(JPEG_IMAGE_WIDTH_TAG)), properties);
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}
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}
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return properties;
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}
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}
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