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Add spring-configurable Tika-powered metadata extractor, content transformer and extractor
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@22683 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Nick Burch
@@ -0,0 +1,116 @@
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/*
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* Copyright (C) 2005-2010 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.content.metadata;
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import java.util.ArrayList;
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import java.util.HashSet;
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import org.alfresco.error.AlfrescoRuntimeException;
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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.mime.MediaType;
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import org.apache.tika.parser.ParseContext;
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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 Apache Tika,
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* and allows the selection of the Tika parser to be
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* sprung-in to extract the metadata from your document.
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* This is typically used with custom Tika Parsers.
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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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* @author Nick Burch
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*/
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public class TikaSpringConfiguredMetadataExtracter extends TikaPoweredMetadataExtracter
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{
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protected static Log logger = LogFactory.getLog(TikaSpringConfiguredMetadataExtracter.class);
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private Parser tikaParser;
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private String tikaParserClassName;
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private Class<? extends Parser> tikaParserClass;
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/**
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* Injects the name of the Tika parser to use
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* @param className
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*/
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@SuppressWarnings("unchecked")
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public void setTikaParserName(String className)
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{
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tikaParserClassName = className;
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// Load the class
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try {
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tikaParserClass = (Class<? extends Parser>)Class.forName(tikaParserClassName);
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setTikaParser(getParser());
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} catch(ClassNotFoundException e) {
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throw new AlfrescoRuntimeException("Specified Tika Parser '" + tikaParserClassName + "' not found");
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}
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}
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/**
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* Injects the Tika parser to use
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* @param parser
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*/
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public void setTikaParser(Parser tikaParser)
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{
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this.tikaParser = tikaParser;
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// Build the mime types, updating the copy our parent
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// holds for us as we go along
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ArrayList<String> mimetypes = new ArrayList<String>();
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for(MediaType mt : tikaParser.getSupportedTypes(new ParseContext()))
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{
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mimetypes.add( mt.toString() );
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}
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super.setSupportedMimetypes(mimetypes);
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}
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public TikaSpringConfiguredMetadataExtracter()
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{
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super(new HashSet<String>());
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}
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/**
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* Returns the Tika parser
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*/
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protected Parser getParser()
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{
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// If we were given a whole parser, return it
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if(tikaParser != null)
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return tikaParser;
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// Otherwise create a new one
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try {
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return tikaParserClass.newInstance();
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} catch (InstantiationException e) {
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throw new AlfrescoRuntimeException("Unable to create specified Parser", e);
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} catch (IllegalAccessException e) {
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throw new AlfrescoRuntimeException("Unable to create specified Parser", e);
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}
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}
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}
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@@ -0,0 +1,20 @@
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#
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# TikaSpringConfiguredMetadataExtracter.properties - default mapping
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#
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# This is used to map from the Tika and standard namespaces
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# onto your content model. This is used for custom tika parsers,
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# but one file is used across all custom parsers.
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#
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# author: Nick Burch
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# Namespaces
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namespace.prefix.cm=http://www.alfresco.org/model/content/1.0
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# Mappings
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author=cm:author
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title=cm:title
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description=cm:description
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created=cm:created
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geo\:lat=cm:latitude
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geo\:long=cm:longitude
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@@ -0,0 +1,300 @@
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/*
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* Copyright (C) 2005-2010 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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|
* it under the terms of the GNU Lesser General Public License as published by
|
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|
* the Free Software Foundation, either version 3 of the License, or
|
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|
* (at your option) any later version.
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|
*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.content.transform;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.StringTokenizer;
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import org.alfresco.error.AlfrescoRuntimeException;
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import org.alfresco.model.ContentModel;
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import org.alfresco.repo.action.ParameterDefinitionImpl;
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import org.alfresco.repo.action.executer.ActionExecuterAbstractBase;
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import org.alfresco.service.cmr.action.Action;
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import org.alfresco.service.cmr.action.ParameterDefinition;
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import org.alfresco.service.cmr.dictionary.DataTypeDefinition;
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import org.alfresco.service.cmr.repository.ContentReader;
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import org.alfresco.service.cmr.repository.ContentService;
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import org.alfresco.service.cmr.repository.ContentWriter;
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import org.alfresco.service.cmr.repository.NodeRef;
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import org.alfresco.service.cmr.repository.NodeService;
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import org.alfresco.service.namespace.QName;
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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.detect.ContainerAwareDetector;
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import org.apache.tika.detect.Detector;
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import org.apache.tika.exception.TikaException;
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import org.apache.tika.extractor.EmbeddedResourceHandler;
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import org.apache.tika.extractor.ParserContainerExtractor;
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import org.apache.tika.io.TikaInputStream;
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import org.apache.tika.mime.MediaType;
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import org.apache.tika.parser.AutoDetectParser;
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/**
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* Warning - this is a prototype service, and will likely change dramatically
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* in Alfresco 4.0!
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*
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* This proto-service provides a way to have Apache Tika extract out
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* certain kinds of embedded resources from within a container file.
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*
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* One use might be to extract all the images in a zip file, another might
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* be to fetch all the Word Documents embedded in an Excel Spreadsheet.
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*
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* Uses the Apache Tika ContainerExtractor framework, along with the
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* Apache Tika Auto-Parser.
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*
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* Not sprung-in by default, you will need to manually list this in
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* an extension context file.
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*
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* @author Nick Burch
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*/
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public class TikaPoweredContainerExtractor
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{
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private static final Log logger = LogFactory.getLog(TikaPoweredContainerExtractor.class);
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private NodeService nodeService;
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private ContentService contentService;
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private AutoDetectParser parser;
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private Detector detector;
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public TikaPoweredContainerExtractor()
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{
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TikaConfig config = TikaConfig.getDefaultConfig();
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detector = new ContainerAwareDetector(
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config.getMimeRepository()
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);
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parser = new AutoDetectParser(detector);
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}
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/**
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* Injects the nodeService bean.
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*
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* @param nodeService the nodeService.
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*/
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public void setNodeService(NodeService nodeService)
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{
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this.nodeService = nodeService;
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}
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/**
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* Injects the contentService bean.
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*
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* @param contentService the contentService.
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*/
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public void setContentService(ContentService contentService)
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{
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this.contentService = contentService;
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}
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/**
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* Extracts out all the entries from the container
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* that match the supplied list of mime types.
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* If no mime types are specified, extracts all
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* available embedded resources.
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*/
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public List<NodeRef> extract(NodeRef source, List<String> mimetypes)
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{
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// Grab the directory to put the nodes into
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// Will be the parent folder of the source
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NodeRef folder = nodeService.getPrimaryParent(source).getParentRef();
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// Get the contents
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ContentReader reader = contentService.getReader(source, ContentModel.PROP_CONTENT);
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TikaInputStream stream = TikaInputStream.get(reader.getContentInputStream());
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// Build the recursing parser
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Extractor handler = new Extractor(folder, mimetypes);
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// Have Tika look for things
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ParserContainerExtractor extractor = new ParserContainerExtractor(
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parser, detector
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);
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try {
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logger.info("Beginning extraction of " + source.toString());
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extractor.extract(stream, null, handler);
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logger.info("Completed extraction of " + source.toString());
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} catch(TikaException te) {
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throw new AlfrescoRuntimeException("Extraction Failed", te);
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} catch(IOException ie) {
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throw new AlfrescoRuntimeException("Extraction Failed", ie);
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}
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// Tidy up
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try {
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stream.close();
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} catch(IOException e) {}
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// All done
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return handler.extracted;
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}
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/**
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* This EmbeddedResourceHandler is called by Tika for each
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* embedded resource. It decides if the resource is to
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* be extracted or not, and if it is, saves it into the
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* specified folder.
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*/
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private class Extractor implements EmbeddedResourceHandler
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{
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private List<NodeRef> extracted;
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private Set<MediaType> acceptTypes;
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private NodeRef folder;
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private int anonymousCount = 0;
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private Extractor(NodeRef folder, List<String> types)
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{
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this.folder = folder;
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this.extracted = new ArrayList<NodeRef>();
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if(types != null && types.size() > 0)
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{
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acceptTypes = new HashSet<MediaType>();
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for(String type : types)
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{
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acceptTypes.add(MediaType.parse(type));
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}
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}
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}
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@Override
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public void handle(String filename, MediaType mediaType,
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InputStream stream) {
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// Do we want it?
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if(acceptTypes == null || acceptTypes.contains(mediaType))
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|
{
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// Ensure we have a filename
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|
if(filename == null)
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{
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anonymousCount++;
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filename = "embedded"+anonymousCount+"."+mediaType.getSubtype();
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|
}
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|
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logger.info("Extracting embedded " + mediaType + " entry " + filename);
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|
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// Save it
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Map<QName,Serializable> properties = new HashMap<QName,Serializable>();
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|
properties.put(ContentModel.PROP_NAME, filename);
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NodeRef node = nodeService.createNode(
|
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|
folder,
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|
ContentModel.ASSOC_CONTAINS,
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|
QName.createQName(filename),
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|
ContentModel.TYPE_CONTENT,
|
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|
properties
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|
).getChildRef();
|
||||||
|
|
||||||
|
ContentWriter writer = contentService.getWriter(
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|
node, ContentModel.PROP_CONTENT, true
|
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|
);
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|
writer.setMimetype(mediaType.toString());
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writer.putContent(stream);
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||||||
|
}
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|
else
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||||||
|
{
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|
logger.info("Skipping embedded " + mediaType + " entry " + filename);
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||||||
|
}
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||||||
|
}
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||||||
|
}
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||||||
|
|
||||||
|
/**
|
||||||
|
* This action executor allows you to trigger extraction as an
|
||||||
|
* action, perhaps from a rule.
|
||||||
|
*
|
||||||
|
* Not sprung-in by default, you will need to manually list this in
|
||||||
|
* an extension context file. You will also need to add properties
|
||||||
|
* files entries.
|
||||||
|
*/
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||||||
|
public static class ExtractorActionExecutor extends ActionExecuterAbstractBase
|
||||||
|
{
|
||||||
|
public static final String NAME = "extractEmbeddedResources";
|
||||||
|
public static final String PARAM_MIME_TYPES = "mime-types";
|
||||||
|
|
||||||
|
private TikaPoweredContainerExtractor extractor;
|
||||||
|
public void setTikaPoweredContainerExtractor(TikaPoweredContainerExtractor extractor)
|
||||||
|
{
|
||||||
|
this.extractor = extractor;
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||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
protected void addParameterDefinitions(List<ParameterDefinition> paramList) {
|
||||||
|
paramList.add(new ParameterDefinitionImpl(
|
||||||
|
PARAM_MIME_TYPES,
|
||||||
|
DataTypeDefinition.TEXT,
|
||||||
|
false,
|
||||||
|
getParamDisplayLabel(PARAM_MIME_TYPES)
|
||||||
|
));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
protected void executeImpl(Action action, NodeRef actionedUponNodeRef) {
|
||||||
|
List<String> mimeTypes = null;
|
||||||
|
String rawTypes = (String)action.getParameterValue(PARAM_MIME_TYPES);
|
||||||
|
if(rawTypes != null && rawTypes.length() > 0)
|
||||||
|
{
|
||||||
|
mimeTypes = new ArrayList<String>();
|
||||||
|
StringTokenizer st = new StringTokenizer(rawTypes, ",");
|
||||||
|
while(st.hasMoreTokens())
|
||||||
|
{
|
||||||
|
mimeTypes.add( st.nextToken().trim() );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
extractor.extract(actionedUponNodeRef, mimeTypes);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/*
|
||||||
|
<?xml version='1.0' encoding='UTF-8'?>
|
||||||
|
<!DOCTYPE beans PUBLIC '-//SPRING//DTD BEAN//EN' 'http://www.springframework.org/dtd/spring-beans.dtd'>
|
||||||
|
<beans>
|
||||||
|
<bean id="tikaPoweredContainerExtractor" class="org.alfresco.repo.content.transform.TikaPoweredContainerExtractor">
|
||||||
|
<property name="nodeService">
|
||||||
|
<ref bean="NodeService" />
|
||||||
|
</property>
|
||||||
|
<property name="contentService">
|
||||||
|
<ref bean="ContentService" />
|
||||||
|
</property>
|
||||||
|
</bean>
|
||||||
|
<bean id="extractEmbeddedResources" class="org.alfresco.repo.content.transform.TikaPoweredContainerExtractor$ExtractorActionExecutor" parent="action-executer">
|
||||||
|
<property name="tikaPoweredContainerExtractor">
|
||||||
|
<ref bean="tikaPoweredContainerExtractor" />
|
||||||
|
</property>
|
||||||
|
</bean>
|
||||||
|
<bean id="extractEmbeddedResources-action-messages" class="org.alfresco.i18n.ResourceBundleBootstrapComponent">
|
||||||
|
<property name="resourceBundles">
|
||||||
|
<list>
|
||||||
|
<value>alfresco.extension.extractor-action-messages</value>
|
||||||
|
</list>
|
||||||
|
</property>
|
||||||
|
</bean>
|
||||||
|
</beans>
|
||||||
|
*/
|
||||||
|
/*
|
||||||
|
extractEmbeddedResources.title=Extract embedded resources
|
||||||
|
extractEmbeddedResources.description=Extract resources from within container files, such as .zip or .docx
|
||||||
|
extractEmbeddedResources.param_mime-types.display-label=Mime Types
|
||||||
|
*/
|
||||||
|
}
|
||||||
@@ -0,0 +1,100 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (C) 2005-2010 Alfresco Software Limited.
|
||||||
|
*
|
||||||
|
* This file is part of Alfresco
|
||||||
|
*
|
||||||
|
* Alfresco is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU Lesser General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* Alfresco is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU Lesser General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Lesser General Public License
|
||||||
|
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
package org.alfresco.repo.content.transform;
|
||||||
|
|
||||||
|
import java.util.ArrayList;
|
||||||
|
|
||||||
|
import org.alfresco.error.AlfrescoRuntimeException;
|
||||||
|
import org.apache.tika.mime.MediaType;
|
||||||
|
import org.apache.tika.parser.ParseContext;
|
||||||
|
import org.apache.tika.parser.Parser;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* A Content Extractor for XML, HTML and Text, which makes
|
||||||
|
* use of Apache Tika, and allows the selection of the
|
||||||
|
* Tika parser to be sprung-in.
|
||||||
|
* Using spring, you list the Tika parser to use, which
|
||||||
|
* may well not be a standard Tika one. You should specify
|
||||||
|
* either a spring created bean, or a parser class name.
|
||||||
|
*
|
||||||
|
* @author Nick Burch
|
||||||
|
*/
|
||||||
|
public class TikaSpringConfiguredContentTransformer extends TikaPoweredContentTransformer
|
||||||
|
{
|
||||||
|
private Parser tikaParser;
|
||||||
|
private String tikaParserClassName;
|
||||||
|
private Class<? extends Parser> tikaParserClass;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Injects the name of the Tika parser to use
|
||||||
|
* @param className
|
||||||
|
*/
|
||||||
|
@SuppressWarnings("unchecked")
|
||||||
|
public void setTikaParserName(String className)
|
||||||
|
{
|
||||||
|
tikaParserClassName = className;
|
||||||
|
|
||||||
|
// Load the class
|
||||||
|
try {
|
||||||
|
tikaParserClass = (Class<? extends Parser>)Class.forName(tikaParserClassName);
|
||||||
|
setTikaParser(getParser());
|
||||||
|
} catch(ClassNotFoundException e) {
|
||||||
|
throw new AlfrescoRuntimeException("Specified Tika Parser '" + tikaParserClassName + "' not found");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Injects the Tika parser to use
|
||||||
|
* @param parser
|
||||||
|
*/
|
||||||
|
public void setTikaParser(Parser tikaParser)
|
||||||
|
{
|
||||||
|
this.tikaParser = tikaParser;
|
||||||
|
|
||||||
|
// Build the mime types, updating the copy our parent
|
||||||
|
// holds for us as we go along
|
||||||
|
for(MediaType mt : tikaParser.getSupportedTypes(new ParseContext()))
|
||||||
|
{
|
||||||
|
super.sourceMimeTypes.add( mt.toString() );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public TikaSpringConfiguredContentTransformer() {
|
||||||
|
super(new ArrayList<String>());
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Returns the Tika parser
|
||||||
|
*/
|
||||||
|
protected Parser getParser()
|
||||||
|
{
|
||||||
|
// If we were given a whole parser, return it
|
||||||
|
if(tikaParser != null)
|
||||||
|
return tikaParser;
|
||||||
|
|
||||||
|
// Otherwise create a new one
|
||||||
|
try {
|
||||||
|
return tikaParserClass.newInstance();
|
||||||
|
} catch (InstantiationException e) {
|
||||||
|
throw new AlfrescoRuntimeException("Unable to create specified Parser", e);
|
||||||
|
} catch (IllegalAccessException e) {
|
||||||
|
throw new AlfrescoRuntimeException("Unable to create specified Parser", e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user