001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.scxml2.env;
018
019import java.io.Serializable;
020
021import org.apache.commons.logging.Log;
022import org.apache.commons.logging.LogFactory;
023import org.xml.sax.ErrorHandler;
024import org.xml.sax.SAXParseException;
025
026/**
027 * Custom error handler that logs the parsing errors in the
028 * SCXML document.
029 */
030public class SimpleErrorHandler implements ErrorHandler, Serializable {
031
032    /** Serial version UID. */
033    private static final long serialVersionUID = 1L;
034    /** Message prefix. */
035    private static final String MSG_PREFIX = "SCXML SAX Parsing: ";
036    /** Message postfix. */
037    private static final String MSG_POSTFIX = " Correct the SCXML document.";
038
039    /** Log. */
040    private Log log = LogFactory.getLog(getClass());
041
042    /**
043     * Constructor.
044     */
045    public SimpleErrorHandler() {
046        super();
047    }
048
049    /**
050     * @see ErrorHandler#error(SAXParseException)
051     */
052    public void error(final SAXParseException exception) {
053        if (log.isErrorEnabled()) {
054            log.error(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
055                exception);
056        }
057    }
058
059    /**
060     * @see ErrorHandler#fatalError(SAXParseException)
061     */
062    public void fatalError(final SAXParseException exception) {
063        if (log.isFatalEnabled()) {
064            log.fatal(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
065                exception);
066        }
067    }
068
069    /**
070     * @see ErrorHandler#warning(SAXParseException)
071     */
072    public void warning(final SAXParseException exception) {
073        if (log.isWarnEnabled()) {
074            log.warn(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
075                exception);
076        }
077    }
078}
079