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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.
*/
/* $Id$ */
package org.apache.fop.fo.extensions;
import java.util.HashMap;
import java.util.Set;
import org.apache.xmlgraphics.util.QName;
import org.apache.fop.fo.ElementMapping;
/**
* Element mapping for FOP's internal extension to XSL-FO.
*/
public class InternalElementMapping extends ElementMapping {
/** The FOP extension namespace URI */
public static final String URI = "http://xmlgraphics.apache.org/fop/internal";
/** The standard XML prefix for elements and attributes in this namespace. */
public static final String STANDARD_PREFIX = "foi";
/** The "struct-id" attribute, to identify a structure tree element. */
public static final String STRUCT_ID = "struct-id";
/** The "struct-ref" attribute, to refer to a structure tree element. */
public static final String STRUCT_REF = "struct-ref";
private static final Set<String> PROPERTY_ATTRIBUTES = new java.util.HashSet<String>();
static {
//These are FOP's extension properties for accessibility
PROPERTY_ATTRIBUTES.add(STRUCT_ID);
PROPERTY_ATTRIBUTES.add(STRUCT_REF);
}
/**
* Constructor.
*/
public InternalElementMapping() {
namespaceURI = URI;
}
/**
* Initialize the data structures.
*/
protected void initialize() {
if (foObjs == null) {
foObjs = new HashMap<String, Maker>();
}
}
/** {@inheritDoc} */
public String getStandardPrefix() {
return STANDARD_PREFIX;
}
/** {@inheritDoc} */
public boolean isAttributeProperty(QName attributeName) {
if (!URI.equals(attributeName.getNamespaceURI())) {
throw new IllegalArgumentException("The namespace URIs don't match");
}
return PROPERTY_ATTRIBUTES.contains(attributeName.getLocalName());
}
}
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