/*
* 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: XMPSchemaRegistry.java 750418 2009-03-05 11:03:54Z vhennebert $ */
package org.apache.xmlgraphics.xmp;
import java.util.Map;
import org.apache.xmlgraphics.xmp.schemas.DublinCoreSchema;
import org.apache.xmlgraphics.xmp.schemas.XMPBasicSchema;
import org.apache.xmlgraphics.xmp.schemas.pdf.AdobePDFSchema;
import org.apache.xmlgraphics.xmp.schemas.pdf.PDFAOldXMPSchema;
import org.apache.xmlgraphics.xmp.schemas.pdf.PDFAXMPSchema;
/**
* This class is a registry of XMP schemas. It's implemented as a singleton.
*/
public class XMPSchemaRegistry {
private static XMPSchemaRegistry instance = null;
private Map schemas = new java.util.HashMap();
private XMPSchemaRegistry() {
init();
}
/** @return the singleton instance of the XMP schema registry. */
public static XMPSchemaRegistry getInstance() {
if (instance == null) {
instance = new XMPSchemaRegistry();
}
return instance;
}
private void init() {
addSchema(new DublinCoreSchema());
addSchema(new PDFAXMPSchema());
addSchema(new PDFAOldXMPSchema());
addSchema(new XMPBasicSchema());
addSchema(new AdobePDFSchema());
}
/**
* Adds an XMP schema to the registry.
* @param schema the XMP schema
*/
public void addSchema(XMPSchema schema) {
schemas.put(schema.getNamespace(), schema);
}
/**
* Returns the XMP schema object for a given namespace.
* @param namespace the namespace URI
* @return the XMP schema or null if none is available
*/
public XMPSchema getSchema(String namespace) {
return (XMPSchema)schemas.get(namespace);
}
}