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This is the core Apache Tika™ toolkit library from which all other modules inherit functionality. It also includes the core facades for the Tika API.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.tika.sax;

import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.Property;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;

/**
 * Content handler decorator that simplifies the task of producing XMP output.
 *
 * @since Apache Tika 1.0
 */
public class XMPContentHandler extends SafeContentHandler {

    /**
     * The RDF namespace URI
     */
    public static final String RDF =
            "http://www.w3.org/1999/02/22-rdf-syntax-ns#";

    /**
     * The XMP namespace URI
     */
    public static final String XMP =
            "http://ns.adobe.com/xap/1.0/";

    private static final Attributes EMPTY_ATTRIBUTES = new AttributesImpl();

    public XMPContentHandler(ContentHandler handler) {
        super(handler);
    }

    /**
     * Starts an XMP document by setting up the namespace mappings and
     * writing out the following header:
     * 
     * <rdf:RDF>
     * 
*/ @Override public void startDocument() throws SAXException { super.startDocument(); startPrefixMapping("rdf", RDF); startPrefixMapping("xmp", XMP); startElement(RDF, "RDF", "rdf:RDF", EMPTY_ATTRIBUTES); } /** * Ends the XMP document by writing the following footer and * clearing the namespace mappings: *
     * </rdf:RDF>
     * 
*/ @Override public void endDocument() throws SAXException { endElement(RDF, "RDF", "rdf:RDF"); endPrefixMapping("xmp"); endPrefixMapping("rdf"); super.endDocument(); } //------------------------------------------< public convenience methods > private String prefix = null; private String uri = null; public void startDescription(String about, String prefix, String uri) throws SAXException { this.prefix = prefix; this.uri = uri; startPrefixMapping(prefix, uri); AttributesImpl attributes = new AttributesImpl(); attributes.addAttribute(RDF, "about", "rdf:about", "CDATA", about); startElement(RDF, "Description", "rdf:Description", attributes); } public void endDescription() throws SAXException { endElement(RDF, "Description", "rdf:Description"); endPrefixMapping(prefix); this.uri = null; this.prefix = null; } public void property(String name, String value) throws SAXException { String qname = prefix + ":" + name; startElement(uri, name, qname, EMPTY_ATTRIBUTES); characters(value.toCharArray(), 0, value.length()); endElement(uri, name, qname); } public void metadata(Metadata metadata) throws SAXException { description(metadata, "xmp", XMP); description(metadata, "dc", "http://purl.org/dc/elements/1.1/"); description(metadata, "xmpTPg", "http://ns.adobe.com/xap/1.0/t/pg/"); description(metadata, "xmpRigths", "http://ns.adobe.com/xap/1.0/rights/"); description(metadata, "xmpMM", "http://ns.adobe.com/xap/1.0/mm/"); description(metadata, "xmpidq", "http://ns.adobe.com/xmp/identifier/qual/1.0/"); description(metadata, "xmpBJ", "http://ns.adobe.com/xap/1.0/bj/"); description(metadata, "xmpDM", "http://ns.adobe.com/xmp/1.0/DynamicMedia/"); description(metadata, "pdf", "http://ns.adobe.com/pdf/1.3/"); description(metadata, "photoshop", "s http://ns.adobe.com/photoshop/1.0/"); description(metadata, "crs", "http://ns.adobe.com/camera-raw-settings/1.0/"); description(metadata, "tiff", "http://ns.adobe.com/tiff/1.0/"); description(metadata, "exif", "http://ns.adobe.com/exif/1.0/"); description(metadata, "aux", "http://ns.adobe.com/exif/1.0/aux/"); } private void description(Metadata metadata, String prefix, String uri) throws SAXException { int count = 0; for (Property property : Property.getProperties(prefix)) { String value = metadata.get(property); if (value != null) { if (count++ == 0) { startDescription("", prefix, uri); } property(property.getName().substring(prefix.length() + 1), value); } } if (count > 0) { endDescription(); } } }




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