| /* |
| * Copyright 2009 Google Inc. |
| * |
| * Licensed 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. |
| */ |
| package com.google.gwt.uibinder.rebind; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.TreeLogger.Type; |
| |
| import org.w3c.dom.Document; |
| import org.xml.sax.ErrorHandler; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| |
| /** |
| * Simplifies instantiation of the w3c XML parser, in just the style that |
| * UiBinder likes it. Used by both prod and test. |
| */ |
| public class W3cDomHelper { |
| private final DocumentBuilderFactory factory; |
| private final DocumentBuilder builder; |
| |
| public W3cDomHelper(final TreeLogger logger) { |
| factory = DocumentBuilderFactory.newInstance(); |
| factory.setNamespaceAware(true); |
| factory.setExpandEntityReferences(true); |
| try { |
| builder = factory.newDocumentBuilder(); |
| } catch (ParserConfigurationException e) { |
| throw new RuntimeException(e); |
| } |
| builder.setEntityResolver(new GwtResourceEntityResolver()); |
| builder.setErrorHandler(new ErrorHandler() { |
| |
| public void error(SAXParseException exception) throws SAXException { |
| logger.log(Type.ERROR, exception.getMessage()); |
| logger.log(Type.DEBUG, "SAXParseException", exception); |
| } |
| |
| public void fatalError(SAXParseException exception) throws SAXException { |
| /* |
| * Fatal errors seem to be no scarier than error errors, and |
| * simply happen due to badly formed XML. |
| */ |
| logger.log(Type.ERROR, exception.getMessage()); |
| logger.log(Type.DEBUG, "SAXParseException", exception); |
| } |
| |
| public void warning(SAXParseException exception) throws SAXException { |
| logger.log(Type.WARN, exception.getMessage()); |
| logger.log(Type.DEBUG, "SAXParseException", exception); |
| } |
| |
| }); |
| } |
| |
| /** |
| * Creates an XML document model with the given contents. Nice for testing. |
| * |
| * @param string the document contents |
| */ |
| public Document documentFor(String string) throws SAXException, IOException { |
| return builder.parse(new ByteArrayInputStream(string.getBytes())); |
| } |
| |
| public Document documentFor(URL url) throws SAXParseException { |
| try { |
| InputStream stream = url.openStream(); |
| InputSource input = new InputSource(stream); |
| input.setSystemId(url.toExternalForm()); |
| |
| return builder.parse(input); |
| } catch (SAXParseException e) { |
| // Let SAXParseExceptions through. |
| throw e; |
| } catch (SAXException e) { |
| throw new RuntimeException(e); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |