| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.xmlgraphics.xmp; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.AttributesImpl; |
| |
| import org.apache.xmlgraphics.util.QName; |
| import org.apache.xmlgraphics.util.XMLizable; |
| import org.apache.xmlgraphics.xmp.merge.MergeRuleSet; |
| import org.apache.xmlgraphics.xmp.merge.PropertyMerger; |
| |
| /** |
| * This class represents the root of an XMP metadata tree. It's more or less equivalent to the |
| * x:xmpmeta element together with its nested rdf:RDF element. |
| */ |
| public class Metadata implements XMLizable, PropertyAccess { |
| |
| private Map properties = new java.util.HashMap(); |
| |
| /** {@inheritDoc} */ |
| public void setProperty(XMPProperty prop) { |
| properties.put(prop.getName(), prop); |
| } |
| |
| /** {@inheritDoc} */ |
| public XMPProperty getProperty(String uri, String localName) { |
| return getProperty(new QName(uri, localName)); |
| } |
| |
| /** {@inheritDoc} */ |
| public XMPProperty getProperty(QName name) { |
| XMPProperty prop = (XMPProperty)properties.get(name); |
| return prop; |
| } |
| |
| /** {@inheritDoc} */ |
| public XMPProperty removeProperty(QName name) { |
| return (XMPProperty)properties.remove(name); |
| } |
| |
| /** {@inheritDoc} */ |
| public XMPProperty getValueProperty() { |
| return getProperty(XMPConstants.RDF_VALUE); |
| } |
| |
| /** {@inheritDoc} */ |
| public int getPropertyCount() { |
| return this.properties.size(); |
| } |
| |
| /** {@inheritDoc} */ |
| public Iterator iterator() { |
| return this.properties.keySet().iterator(); |
| } |
| |
| /** |
| * Merges this metadata object into a given target metadata object. The merge rule set provided |
| * by each schema is used for the merge. |
| * @param target the target metadata to merge the local metadata into |
| */ |
| public void mergeInto(Metadata target, List<Class> exclude) { |
| XMPSchemaRegistry registry = XMPSchemaRegistry.getInstance(); |
| for (Object o : properties.values()) { |
| XMPProperty prop = (XMPProperty) o; |
| XMPSchema schema = registry.getSchema(prop.getNamespace()); |
| if (!exclude.contains(schema.getClass())) { |
| MergeRuleSet rules = schema.getDefaultMergeRuleSet(); |
| PropertyMerger merger = rules.getPropertyMergerFor(prop); |
| merger.merge(prop, target); |
| } |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public void toSAX(ContentHandler handler) throws SAXException { |
| AttributesImpl atts = new AttributesImpl(); |
| handler.startPrefixMapping("x", XMPConstants.XMP_NAMESPACE); |
| handler.startElement(XMPConstants.XMP_NAMESPACE, "xmpmeta", "x:xmpmeta", atts); |
| handler.startPrefixMapping("rdf", XMPConstants.RDF_NAMESPACE); |
| handler.startElement(XMPConstants.RDF_NAMESPACE, "RDF", "rdf:RDF", atts); |
| //Get all property namespaces |
| Set namespaces = new java.util.HashSet(); |
| Iterator iter = properties.keySet().iterator(); |
| while (iter.hasNext()) { |
| QName n = ((QName)iter.next()); |
| namespaces.add(n.getNamespaceURI()); |
| } |
| //One Description element per namespace |
| iter = namespaces.iterator(); |
| while (iter.hasNext()) { |
| String ns = (String)iter.next(); |
| XMPSchema schema = XMPSchemaRegistry.getInstance().getSchema(ns); |
| String prefix = (schema != null ? schema.getPreferredPrefix() : null); |
| |
| boolean first = true; |
| boolean empty = true; |
| |
| for (Object o : properties.values()) { |
| XMPProperty prop = (XMPProperty) o; |
| if (prop.getName().getNamespaceURI().equals(ns)) { |
| if (first) { |
| if (prefix == null) { |
| prefix = prop.getName().getPrefix(); |
| } |
| atts.clear(); |
| atts.addAttribute(XMPConstants.RDF_NAMESPACE, |
| "about", "rdf:about", "CDATA", ""); |
| if (prefix != null) { |
| handler.startPrefixMapping(prefix, ns); |
| } |
| handler.startElement(XMPConstants.RDF_NAMESPACE, |
| "Description", "rdf:Description", atts); |
| empty = false; |
| first = false; |
| } |
| prop.toSAX(handler); |
| } |
| } |
| if (!empty) { |
| handler.endElement(XMPConstants.RDF_NAMESPACE, "Description", "rdf:Description"); |
| if (prefix != null) { |
| handler.endPrefixMapping(prefix); |
| } |
| } |
| } |
| |
| handler.endElement(XMPConstants.RDF_NAMESPACE, "RDF", "rdf:RDF"); |
| handler.endPrefixMapping("rdf"); |
| handler.endElement(XMPConstants.XMP_NAMESPACE, "xmpmeta", "x:xmpmeta"); |
| handler.endPrefixMapping("x"); |
| } |
| |
| } |