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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.render.ps.extensions;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.fop.util.ContentHandlerFactory;
- import org.apache.fop.util.ContentHandlerFactory.ObjectBuiltListener;
- import org.xml.sax.Attributes;
- import org.xml.sax.SAXException;
- import org.xml.sax.helpers.DefaultHandler;
-
- /**
- * ContentHandler (parser) for restoring PSExtension objects from XML.
- */
- public class PSExtensionHandler extends DefaultHandler
- implements ContentHandlerFactory.ObjectSource {
-
- /** Logger instance */
- protected static Log log = LogFactory.getLog(PSExtensionHandler.class);
-
- private StringBuffer content = new StringBuffer();
- private Attributes lastAttributes;
-
- private PSExtensionAttachment returnedObject;
- private ObjectBuiltListener listener;
-
- /** {@inheritDoc} */
- public void startElement(String uri, String localName, String qName, Attributes attributes)
- throws SAXException {
- boolean handled = false;
- if (PSExtensionAttachment.CATEGORY.equals(uri)) {
- lastAttributes = attributes;
- handled = false;
- if (localName.equals(PSSetupCode.ELEMENT)
- || localName.equals(PSSetPageDevice.ELEMENT)
- || localName.equals(PSCommentBefore.ELEMENT)
- || localName.equals(PSCommentAfter.ELEMENT)) {
- //handled in endElement
- handled = true;
- }
- }
- if (!handled) {
- if (PSExtensionAttachment.CATEGORY.equals(uri)) {
- throw new SAXException("Unhandled element " + localName
- + " in namespace: " + uri);
- } else {
- log.warn("Unhandled element " + localName
- + " in namespace: " + uri);
- }
- }
- }
-
- /** {@inheritDoc} */
- public void endElement(String uri, String localName, String qName) throws SAXException {
- if (PSExtensionAttachment.CATEGORY.equals(uri)) {
- if (PSSetupCode.ELEMENT.equals(localName)) {
- String name = lastAttributes.getValue("name");
- this.returnedObject = new PSSetupCode(name, content.toString());
- } else if (PSSetPageDevice.ELEMENT.equals(localName)) {
- String name = lastAttributes.getValue("name");
- this.returnedObject = new PSSetPageDevice(name, content.toString());
- } else if (PSCommentBefore.ELEMENT.equals(localName)) {
- this.returnedObject = new PSCommentBefore(content.toString());
- } else if (PSCommentAfter.ELEMENT.equals(localName)) {
- this.returnedObject = new PSCommentAfter(content.toString());
- }
- }
- content.setLength(0); //Reset text buffer (see characters())
- }
-
- /** {@inheritDoc} */
- public void characters(char[] ch, int start, int length) throws SAXException {
- content.append(ch, start, length);
- }
-
- /**
- * {@inheritDoc}
- */
- public void endDocument() throws SAXException {
- if (listener != null) {
- listener.notifyObjectBuilt(getObject());
- }
- }
-
- /**
- * {@inheritDoc}
- */
- public Object getObject() {
- return returnedObject;
- }
-
- /**
- * {@inheritDoc}
- */
- public void setObjectBuiltListener(ObjectBuiltListener listener) {
- this.listener = listener;
- }
- }
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