| /* |
| * 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.dev.resource.ResourceOracle; |
| |
| import org.w3c.dom.Document; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParser; |
| import javax.xml.parsers.SAXParserFactory; |
| |
| /** |
| * 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 static final String LOAD_EXTERNAL_DTD = |
| "http://apache.org/xml/features/nonvalidating/load-external-dtd"; |
| |
| private final SAXParserFactory factory; |
| private final TreeLogger logger; |
| private final ResourceOracle resourceOracle; |
| |
| public W3cDomHelper(TreeLogger logger, ResourceOracle resourceOracle) { |
| this.logger = logger; |
| this.resourceOracle = resourceOracle; |
| factory = SAXParserFactory.newInstance(); |
| try { |
| factory.setFeature(LOAD_EXTERNAL_DTD, true); |
| } catch (ParserConfigurationException e) { |
| throw new RuntimeException(e); |
| } catch (SAXException e) { |
| // ignore since parser doesn't know about this feature |
| } |
| factory.setNamespaceAware(true); |
| } |
| |
| /** |
| * Creates an XML document model with the given contents. |
| */ |
| public Document documentFor(String string, String resourcePath) |
| throws SAXParseException { |
| try { |
| if (resourcePath != null) { |
| int pos = resourcePath.lastIndexOf('/'); |
| resourcePath = (pos < 0) ? "" : resourcePath.substring(0, pos + 1); |
| } |
| W3cDocumentBuilder handler = new W3cDocumentBuilder(logger, resourcePath, |
| resourceOracle); |
| SAXParser parser = factory.newSAXParser(); |
| InputSource input = new InputSource(new StringReader(string)); |
| input.setSystemId(resourcePath); |
| parser.parse(input, handler); |
| return handler.getDocument(); |
| } catch (SAXParseException e) { |
| // Let SAXParseExceptions through. |
| throw e; |
| } catch (SAXException e) { |
| throw new RuntimeException(e); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } catch (ParserConfigurationException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |