/*
* 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.
*/
package org.apache.sling.rewriter.impl.components;
import javax.xml.transform.ErrorListener;
import javax.xml.transform.SourceLocator;
import javax.xml.transform.TransformerException;
import org.slf4j.Logger;
/**
* This error handler simply logs all exception and, in case of a fatal error,
* the exception is rethrown. Warnings and errors are not re-thrown.
*/
public class TraxErrorHandler implements ErrorListener {
private final Logger logger;
private StringBuilder warnings = new StringBuilder("Errors in serialization:\n");
public TraxErrorHandler(Logger logger) {
this.logger = logger;
}
public void warning(TransformerException exception)
throws TransformerException {
final String message = getMessage(exception);
if (this.logger != null) {
this.logger.warn(message);
} else {
System.out.println("WARNING: " + message);
}
warnings.append("Warning: ");
warnings.append(message);
warnings.append("\n");
}
public void error(TransformerException exception)
throws TransformerException {
final String message = getMessage(exception);
if (this.logger != null) {
this.logger.error(message, exception);
} else {
System.out.println("ERROR: " + message);
}
warnings.append("Error: ");
warnings.append(message);
warnings.append("\n");
}
public void fatalError(TransformerException exception)
throws TransformerException {
final String message = getMessage(exception);
if (this.logger != null) {
this.logger.error(message, exception);
} else {
System.out.println("FATAL-ERROR: " + message);
}
warnings.append("Fatal: ");
warnings.append(message);
warnings.append("\n");
try {
throw new TransformerException(warnings.toString());
} finally {
warnings = new StringBuilder();
}
}
private String getMessage(TransformerException exception) {
SourceLocator locator = exception.getLocator();
if (locator != null) {
String id = (!locator.getPublicId().equals(locator.getPublicId()))
? locator.getPublicId()
: (null != locator.getSystemId())
? locator.getSystemId() : "SystemId Unknown";
return "File " + id
+ "; Line " + locator.getLineNumber()
+ "; Column " + locator.getColumnNumber()
+ "; " + exception.getMessage();
}
return exception.getMessage();
}
}