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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.util;
-
- import org.xml.sax.Attributes;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.SAXException;
- import org.xml.sax.helpers.AttributesImpl;
-
- import org.apache.xmlgraphics.util.QName;
-
- /**
- * This class is a delegating SAX ContentHandler which has the purpose to provide a few handy
- * methods that make life easier when generating SAX events.
- */
- public class GenerationHelperContentHandler extends DelegatingContentHandler {
-
- private static final Attributes EMPTY_ATTS = new AttributesImpl();
-
- private String mainNamespace;
- private Object contentHandlerContext;
-
- /**
- * Main constructor. If the given handler also implements any of the EntityResolver,
- * DTDHandler, LexicalHandler or ErrorHandler interfaces, these are set automatically.
- * @param handler the SAX content handler to delegate all calls to
- * @param mainNamespace the main namespace used for generated XML content when abbreviated
- * ContentHandler calls are used.
- * @param contentHandlerContext additional content handler context state
- */
- public GenerationHelperContentHandler(ContentHandler handler, String mainNamespace, Object contentHandlerContext) {
- super(handler);
- this.mainNamespace = mainNamespace;
- this.contentHandlerContext = contentHandlerContext;
- }
-
- /**
- * Returns the main namespace used for generated XML content.
- * @return the main namespace
- */
- public String getMainNamespace() {
- return this.mainNamespace;
- }
-
- /**
- * Sets the main namespace used for generated XML content when abbreviated ContentHandler
- * calls are used.
- * @param namespaceURI the new main namespace URI
- */
- public void setMainNamespace(String namespaceURI) {
- this.mainNamespace = namespaceURI;
- }
-
- /**
- * Returns the context object (may be null).
- * @return the context object
- */
- public Object getContentHandlerContext() {
- return this.contentHandlerContext;
- }
-
- /**
- * Convenience method to generate a startElement SAX event.
- * @param localName the local name of the element
- * @param atts the attributes
- * @throws SAXException if a SAX exception occurs
- */
- public void startElement(String localName, Attributes atts) throws SAXException {
- getDelegateContentHandler().startElement(getMainNamespace(), localName, localName, atts);
- }
-
- /**
- * Convenience method to generate a startElement SAX event.
- * @param localName the local name of the element
- * @throws SAXException if a SAX exception occurs
- */
- public void startElement(String localName) throws SAXException {
- startElement(localName, EMPTY_ATTS);
- }
-
- /**
- * Convenience method to generate a startElement SAX event.
- * @param qName the qualified name of the element
- * @param atts the attributes
- * @throws SAXException if a SAX exception occurs
- */
- public void startElement(QName qName, Attributes atts) throws SAXException {
- getDelegateContentHandler().startElement(qName.getNamespaceURI(), qName.getLocalName(),
- qName.getQName(), atts);
- }
-
- /**
- * Convenience method to generate a startElement SAX event.
- * @param qName the qualified name of the element
- * @throws SAXException if a SAX exception occurs
- */
- public void startElement(QName qName) throws SAXException {
- startElement(qName, EMPTY_ATTS);
- }
-
- /**
- * Convenience method to generate a endElement SAX event.
- * @param localName the local name of the element
- * @throws SAXException if a SAX exception occurs
- */
- public void endElement(String localName) throws SAXException {
- getDelegateContentHandler().endElement(getMainNamespace(), localName, localName);
- }
-
- /**
- * Convenience method to generate a startElement SAX event.
- * @param qName the qualified name of the element
- * @throws SAXException if a SAX exception occurs
- */
- public void endElement(QName qName) throws SAXException {
- getDelegateContentHandler().endElement(qName.getNamespaceURI(), qName.getLocalName(),
- qName.getQName());
- }
-
- /**
- * Convenience method to generate an empty element with attributes.
- * @param localName the local name of the element
- * @param atts the attributes
- * @throws SAXException if a SAX exception occurs
- */
- public void element(String localName, Attributes atts) throws SAXException {
- getDelegateContentHandler().startElement(getMainNamespace(), localName, localName, atts);
- getDelegateContentHandler().endElement(getMainNamespace(), localName, localName);
- }
-
- /**
- * Convenience method to generate an empty element with attributes.
- * @param qName the qualified name of the element
- * @param atts the attributes
- * @throws SAXException if a SAX exception occurs
- */
- public void element(QName qName, Attributes atts) throws SAXException {
- getDelegateContentHandler().startElement(qName.getNamespaceURI(), qName.getLocalName(),
- qName.getQName(), atts);
- getDelegateContentHandler().endElement(qName.getNamespaceURI(), qName.getLocalName(),
- qName.getQName());
- }
-
- }
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