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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.commons.scxml.env;
    18
    19  import java.io.Serializable;
    20
    21  import org.apache.commons.logging.Log;
    22  import org.apache.commons.logging.LogFactory;
    23  import org.xml.sax.ErrorHandler;
    24  import org.xml.sax.SAXParseException;
    25
    26  /***
    27   * Custom error handler that logs the parsing errors in the
    28   * SCXML document.
    29   */
    30  public class SimpleErrorHandler implements ErrorHandler, Serializable {
    31
    32      /*** Serial version UID. */
    33      private static final long serialVersionUID = 1L;
    34      /*** Message prefix. */
    35      private static final String MSG_PREFIX = "SCXML SAX Parsing: ";
    36      /*** Message postfix. */
    37      private static final String MSG_POSTFIX = " Correct the SCXML document.";
    38
    39      /*** Log. */
    40      private Log log = LogFactory.getLog(getClass());
    41
    42      /***
    43       * Constructor.
    44       */
    45      public SimpleErrorHandler() {
    46          super();
    47      }
    48
    49      /***
    50       * @see ErrorHandler#error(SAXParseException)
    51       */
    52      public void error(final SAXParseException exception) {
    53          if (log.isErrorEnabled()) {
    54              log.error(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
    55                  exception);
    56          }
    57      }
    58
    59      /***
    60       * @see ErrorHandler#fatalError(SAXParseException)
    61       */
    62      public void fatalError(final SAXParseException exception) {
    63          if (log.isFatalEnabled()) {
    64              log.fatal(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
    65                  exception);
    66          }
    67      }
    68
    69      /***
    70       * @see ErrorHandler#warning(SAXParseException)
    71       */
    72      public void warning(final SAXParseException exception) {
    73          if (log.isWarnEnabled()) {
    74              log.warn(MSG_PREFIX + exception.getMessage() + MSG_POSTFIX,
    75                  exception);
    76          }
    77      }
    78  }
    79