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/*
* The MIT License
*
* Copyright 2011 JogAmp Community, Sven Gothel
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import org.dom4j.io.SAXReader;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
/**
* Tolerant XML ErrorHandler.
* <p>
* The following XML error cases are currently tolerated (ignored):
* <ul>
* <li> XERCES - FatalError - Content is not allowed in trailing section.</li>
* </ul>
* </p>
*
*/
public class XMLTolerantErrorHandler implements ErrorHandler {
public static final String XERCES_FEATURE_PREFIX = "http://apache.org/xml/features/";
public static final String CONTINUE_AFTER_FATAL_ERROR_FEATURE = "continue-after-fatal-error";
public static final String msgContentIllegalInTrailingMisc = "Content is not allowed in trailing section.";
public static final String XERCES_CONTINUE_AFTER_FATAL_ERROR_FEATURE =
XERCES_FEATURE_PREFIX + CONTINUE_AFTER_FATAL_ERROR_FEATURE;
/**
* Attach an instance of this class as this reader's error handler.
* This will also set the feature {@link #CONTINUE_AFTER_FATAL_ERROR_FEATURE CONTINUE_AFTER_FATAL_ERROR_FEATURE},
* assuming the SAX parser is XERCES.
* @param reader
*/
public static void attach(SAXReader reader, boolean ignoreSetFeatureException)
throws SAXException
{
try {
reader.setFeature(XERCES_CONTINUE_AFTER_FATAL_ERROR_FEATURE, true);
} catch (SAXException ex) {
if(!ignoreSetFeatureException) {
throw ex;
}
ex.printStackTrace();
}
reader.setErrorHandler(new XMLTolerantErrorHandler());
}
/**
* Attach an instance of this class as this reader's error handler.
* This will also set the feature {@link #CONTINUE_AFTER_FATAL_ERROR_FEATURE CONTINUE_AFTER_FATAL_ERROR_FEATURE},
* assuming the SAX parser is XERCES.
* @param reader
* @return true if successful, otherwise false
*/
public static void attach(XMLReader reader, boolean ignoreSetFeatureException)
throws SAXException
{
try {
reader.setFeature(XERCES_CONTINUE_AFTER_FATAL_ERROR_FEATURE, true);
} catch (SAXException ex) {
if(!ignoreSetFeatureException) {
throw ex;
}
ex.printStackTrace();
}
reader.setErrorHandler(new XMLTolerantErrorHandler());
}
public static boolean exceptionMessageEquals(Throwable cause, final Class exceptionType, final String exceptionMessage) {
while ( null != cause ) {
if( exceptionType.isInstance(cause) ) {
if( exceptionMessage.equals(cause.getMessage()) ) {
return true;
}
}
cause = cause.getCause();
}
return false;
}
public void warning(SAXParseException exception) throws SAXException {
System.err.println("Warning: " + exception.getMessage());
exception.printStackTrace();
}
public void error(SAXParseException exception) throws SAXException {
System.err.println("Error: " + exception.getMessage());
exception.printStackTrace();
}
public void fatalError(SAXParseException exception) throws SAXException {
if(exceptionMessageEquals(exception, SAXException.class, msgContentIllegalInTrailingMisc)) {
printCatched("fatalError(SAXException "+msgContentIllegalInTrailingMisc+")", exception);
return; // keep going ..
}
System.err.println("FatalError: " + exception.getMessage());
throw exception;
}
static void printCatched(String header, Exception ex) {
System.err.println("************************************************");
System.err.println("Catched: " + header);
System.err.println("------------------------------------------------");
ex.printStackTrace();
System.err.println("************************************************");
}
}
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