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/*
* 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.xerces.util;
import org.apache.xerces.xni.XMLLocator;
import org.apache.xerces.xni.XNIException;
import org.apache.xerces.xni.parser.XMLErrorHandler;
import org.apache.xerces.xni.parser.XMLParseException;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* This class wraps a SAX error handler in an XNI error handler.
*
* @see ErrorHandler
*
* @author Andy Clark, IBM
*
* @version $Id$
*/
public class ErrorHandlerWrapper
implements XMLErrorHandler {
//
// Data
//
/** The SAX error handler. */
protected ErrorHandler fErrorHandler;
//
// Constructors
//
/** Default constructor. */
public ErrorHandlerWrapper() {}
/** Wraps the specified SAX error handler. */
public ErrorHandlerWrapper(ErrorHandler errorHandler) {
setErrorHandler(errorHandler);
} // (ErrorHandler)
//
// Public methods
//
/** Sets the SAX error handler. */
public void setErrorHandler(ErrorHandler errorHandler) {
fErrorHandler = errorHandler;
} // setErrorHandler(ErrorHandler)
/** Returns the SAX error handler. */
public ErrorHandler getErrorHandler() {
return fErrorHandler;
} // getErrorHandler():ErrorHandler
//
// XMLErrorHandler methods
//
/**
* Reports a warning. Warnings are non-fatal and can be safely ignored
* by most applications.
*
* @param domain The domain of the warning. The domain can be any
* string but is suggested to be a valid URI. The
* domain can be used to conveniently specify a web
* site location of the relevent specification or
* document pertaining to this warning.
* @param key The warning key. This key can be any string and
* is implementation dependent.
* @param exception Exception.
*
* @throws XNIException Thrown to signal that the parser should stop
* parsing the document.
*/
public void warning(String domain, String key,
XMLParseException exception) throws XNIException {
if (fErrorHandler != null) {
SAXParseException saxException = createSAXParseException(exception);
try {
fErrorHandler.warning(saxException);
}
catch (SAXParseException e) {
throw createXMLParseException(e);
}
catch (SAXException e) {
throw createXNIException(e);
}
}
} // warning(String,String,XMLParseException)
/**
* Reports an error. Errors are non-fatal and usually signify that the
* document is invalid with respect to its grammar(s).
*
* @param domain The domain of the error. The domain can be any
* string but is suggested to be a valid URI. The
* domain can be used to conveniently specify a web
* site location of the relevent specification or
* document pertaining to this error.
* @param key The error key. This key can be any string and
* is implementation dependent.
* @param exception Exception.
*
* @throws XNIException Thrown to signal that the parser should stop
* parsing the document.
*/
public void error(String domain, String key,
XMLParseException exception) throws XNIException {
if (fErrorHandler != null) {
SAXParseException saxException = createSAXParseException(exception);
try {
fErrorHandler.error(saxException);
}
catch (SAXParseException e) {
throw createXMLParseException(e);
}
catch (SAXException e) {
throw createXNIException(e);
}
}
} // error(String,String,XMLParseException)
/**
* Report a fatal error. Fatal errors usually occur when the document
* is not well-formed and signifies that the parser cannot continue
* normal operation.
*
* Note: The error handler should always
* throw an XNIException from this method. This exception
* can either be the same exception that is passed as a parameter to
* the method or a new XNI exception object. If the registered error
* handler fails to throw an exception, the continuing operation of
* the parser is undetermined.
*
* @param domain The domain of the fatal error. The domain can be
* any string but is suggested to be a valid URI. The
* domain can be used to conveniently specify a web
* site location of the relevent specification or
* document pertaining to this fatal error.
* @param key The fatal error key. This key can be any string
* and is implementation dependent.
* @param exception Exception.
*
* @throws XNIException Thrown to signal that the parser should stop
* parsing the document.
*/
public void fatalError(String domain, String key,
XMLParseException exception) throws XNIException {
if (fErrorHandler != null) {
SAXParseException saxException = createSAXParseException(exception);
try {
fErrorHandler.fatalError(saxException);
}
catch (SAXParseException e) {
throw createXMLParseException(e);
}
catch (SAXException e) {
throw createXNIException(e);
}
}
} // fatalError(String,String,XMLParseException)
//
// Protected methods
//
/** Creates a SAXParseException from an XMLParseException. */
protected static SAXParseException createSAXParseException(XMLParseException exception) {
return new SAXParseException(exception.getMessage(),
exception.getPublicId(),
exception.getExpandedSystemId(),
exception.getLineNumber(),
exception.getColumnNumber(),
exception.getException());
} // createSAXParseException(XMLParseException):SAXParseException
/** Creates an XMLParseException from a SAXParseException. */
protected static XMLParseException createXMLParseException(SAXParseException exception) {
final String fPublicId = exception.getPublicId();
final String fExpandedSystemId = exception.getSystemId();
final int fLineNumber = exception.getLineNumber();
final int fColumnNumber = exception.getColumnNumber();
XMLLocator location = new XMLLocator() {
public String getPublicId() { return fPublicId; }
public String getExpandedSystemId() { return fExpandedSystemId; }
public String getBaseSystemId() { return null; }
public String getLiteralSystemId() { return null; }
public int getColumnNumber() { return fColumnNumber; }
public int getLineNumber() { return fLineNumber; }
public int getCharacterOffset() { return -1; }
public String getEncoding() { return null; }
public String getXMLVersion() { return null; }
};
return new XMLParseException(location, exception.getMessage(),exception);
} // createXMLParseException(SAXParseException):XMLParseException
/** Creates an XNIException from a SAXException.
NOTE: care should be taken *not* to call this with a SAXParseException; this will
lose information!!! */
protected static XNIException createXNIException(SAXException exception) {
return new XNIException(exception.getMessage(),exception);
} // createXNIException(SAXException):XMLParseException
} // class ErrorHandlerWrapper