| /* |
| * 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.events.model; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.Serializable; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import javax.xml.transform.OutputKeys; |
| import javax.xml.transform.Result; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerConfigurationException; |
| import javax.xml.transform.TransformerFactoryConfigurationError; |
| import javax.xml.transform.sax.SAXTransformerFactory; |
| import javax.xml.transform.sax.TransformerHandler; |
| import javax.xml.transform.stream.StreamResult; |
| |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.AttributesImpl; |
| |
| import org.apache.commons.io.IOUtils; |
| |
| import org.apache.xmlgraphics.util.XMLizable; |
| |
| /** |
| * Represents a whole event model that supports multiple event producers. |
| */ |
| public class EventModel implements Serializable, XMLizable { |
| |
| private static final long serialVersionUID = 7468592614934605082L; |
| |
| private Map producers = new java.util.LinkedHashMap(); |
| |
| /** |
| * Creates a new, empty event model |
| */ |
| public EventModel() { |
| } |
| |
| /** |
| * Adds the model of an event producer to the event model. |
| * @param producer the event producer model |
| */ |
| public void addProducer(EventProducerModel producer) { |
| this.producers.put(producer.getInterfaceName(), producer); |
| } |
| |
| /** |
| * Returns an iterator over the contained event producer models. |
| * @return an iterator (Iterator<EventProducerModel>) |
| */ |
| public Iterator getProducers() { |
| return this.producers.values().iterator(); |
| } |
| |
| /** |
| * Returns the model of an event producer with the given interface name. |
| * @param interfaceName the fully qualified name of the event producer |
| * @return the model instance for the event producer (or null if it wasn't found) |
| */ |
| public EventProducerModel getProducer(String interfaceName) { |
| return (EventProducerModel)this.producers.get(interfaceName); |
| } |
| |
| /** |
| * Returns the model of an event producer with the given interface. |
| * @param clazz the interface of the event producer |
| * @return the model instance for the event producer (or null if it wasn't found) |
| */ |
| public EventProducerModel getProducer(Class clazz) { |
| return getProducer(clazz.getName()); |
| } |
| |
| /** {@inheritDoc} */ |
| public void toSAX(ContentHandler handler) throws SAXException { |
| AttributesImpl atts = new AttributesImpl(); |
| String elName = "event-model"; |
| handler.startElement("", elName, elName, atts); |
| Iterator iter = getProducers(); |
| while (iter.hasNext()) { |
| ((XMLizable)iter.next()).toSAX(handler); |
| } |
| handler.endElement("", elName, elName); |
| } |
| |
| private void writeXMLizable(XMLizable object, File outputFile) throws IOException { |
| //These two approaches do not seem to work in all environments: |
| //Result res = new StreamResult(outputFile); |
| //Result res = new StreamResult(outputFile.toURI().toURL().toExternalForm()); |
| //With an old Xalan version: file:/C:/.... --> file:\C:\..... |
| OutputStream out = new java.io.FileOutputStream(outputFile); |
| out = new java.io.BufferedOutputStream(out); |
| Result res = new StreamResult(out); |
| |
| try { |
| SAXTransformerFactory tFactory |
| = (SAXTransformerFactory)SAXTransformerFactory.newInstance(); |
| TransformerHandler handler = tFactory.newTransformerHandler(); |
| Transformer transformer = handler.getTransformer(); |
| transformer.setOutputProperty(OutputKeys.INDENT, "yes"); |
| handler.setResult(res); |
| handler.startDocument(); |
| object.toSAX(handler); |
| handler.endDocument(); |
| } catch (TransformerConfigurationException e) { |
| throw new IOException(e.getMessage()); |
| } catch (TransformerFactoryConfigurationError e) { |
| throw new IOException(e.getMessage()); |
| } catch (SAXException e) { |
| throw new IOException(e.getMessage()); |
| } finally { |
| IOUtils.closeQuietly(out); |
| } |
| } |
| |
| /** |
| * Saves this event model to an XML file. |
| * @param modelFile the target file |
| * @throws IOException if an I/O error occurs |
| */ |
| public void saveToXML(File modelFile) throws IOException { |
| writeXMLizable(this, modelFile); |
| } |
| |
| } |