cvs commit: xml-xerces/java/src/org/apache/xerces/util ErrorHandlerProxy.java

[mr...@apache.org]

mrglavas    2005/06/20 11:36:05

  Added:       java/src/org/apache/xerces/util ErrorHandlerProxy.java
  Log:
  Merging in ErrorHandlerProxy from the JAXP 1.3 RI.
  
  Revision  Changes    Path
  1.1                  xml-xerces/java/src/org/apache/xerces/util/ErrorHandlerProxy.java
  
  Index: ErrorHandlerProxy.java
  ===================================================================
  /*
   * Copyright 2005 The Apache Software Foundation.
   * 
   * 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 org.apache.xerces.util;
  
  import org.apache.xerces.xni.parser.XMLErrorHandler;
  import org.xml.sax.ErrorHandler;
  import org.xml.sax.SAXException;
  import org.xml.sax.SAXParseException;
  
  /**
   * Wraps {@link XMLErrorHandler} and make it look like a SAX {@link ErrorHandler}.  
   * 
   * <p>
   * The derived class should override the {@link #getErrorHandler()} method
   * so that it will return the correct {@link XMLErrorHandler} instance.
   * This method will be called whenever an error/warning is found.
   * 
   * <p>
   * Experience shows that it is better to store the actual
   * {@link XMLErrorHandler} in one place and looks up that variable,
   * rather than copying it into every component that needs an error handler
   * and update all of them whenever it is changed, IMO.
   * 
   * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
   */
  public abstract class ErrorHandlerProxy implements ErrorHandler {
      
      public void error(SAXParseException e) throws SAXException {
          XMLErrorHandler eh = getErrorHandler();
          if(eh instanceof ErrorHandlerWrapper) {
              ((ErrorHandlerWrapper)eh).fErrorHandler.error(e);
          }
          eh.error("","",ErrorHandlerWrapper.createXMLParseException(e));
          // if an XNIException is thrown, just let it go.
          // REVISIT: is this OK? or should we try to wrap it into SAXException?
      }
  
      public void fatalError(SAXParseException e) throws SAXException {
          XMLErrorHandler eh = getErrorHandler();
          if(eh instanceof ErrorHandlerWrapper) {
              ((ErrorHandlerWrapper)eh).fErrorHandler.fatalError(e);
          }
          eh.fatalError("","",ErrorHandlerWrapper.createXMLParseException(e));
      }
  
      public void warning(SAXParseException e) throws SAXException {
          XMLErrorHandler eh = getErrorHandler();
          if(eh instanceof ErrorHandlerWrapper) {
              ((ErrorHandlerWrapper)eh).fErrorHandler.warning(e);
          }
          eh.warning("","",ErrorHandlerWrapper.createXMLParseException(e));
      }
  
      protected abstract XMLErrorHandler getErrorHandler();
  }
  
  
  

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