/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2002 (C) Intalio, Inc. All Rights Reserved.
*
* $Id$
*/
package org.exolab.castor.util;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
//import org.apache.xerces.utils.regex.RegularExpression;
//import org.apache.xerces.utils.regex.ParseException;
/**
* An implementation of the XercesRegExpEvaluator that uses the
* Regular Expression library in Xerces. For more information
* about the Xerces Regular Expression library please visit:
* <a href="
http://xml.apache.org/xerces-j/apiDocs/org/apache/xerces/utils/regex/RegularExpression.html
">
*
http://xml.apache.org/xerces-j/apiDocs/org/apache/xerces/utils/regex/RegularExpression.html
</a>
*
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @author <a href="mailto:tora@debian.org">Takashi Okamoto</a>
* @version $Revision$ $Date: 2006-01-16 13:22:58 -0700 (Mon, 16 Jan 2006) $
**/
public class XercesRegExpEvaluator
implements RegExpEvaluator
{
private static final Log LOG = LogFactory.getLog(XercesRegExpEvaluator.class);
private static final String BOL = "^";
private static final String EOL = "$";
private static final String CLASS_NAME = "org.apache.xerces.utils.regex.RegularExpression";
/**
* The Regular expression
**/
// RegularExpression _regexp = null;
Object _regexp = null;
private Constructor _constructor;
/**
* Creates a new XercesRegExpEvaluator
**/
public XercesRegExpEvaluator() {
super();
Class regexpClass;
try {
regexpClass = Class.forName(CLASS_NAME);
_constructor = regexpClass.getConstructor( new Class[] { String.class } );
} catch (ClassNotFoundException e) {
LOG.error("Problem loading class " + CLASS_NAME, e);
throw new IllegalAccessError("Problem loading class " + CLASS_NAME + ": " + e.getMessage());
} catch (SecurityException e) {
LOG.error("Problem accessing constructor of class " + CLASS_NAME, e);
throw new IllegalAccessError("Problem accessnig constructor of class " + CLASS_NAME + ": " + e.getMessage());
} catch (NoSuchMethodException e) {
LOG.error("Problem locating constructor of class " + CLASS_NAME, e);
throw new IllegalAccessError("class " + CLASS_NAME + ": " + e.getMessage());
}
} //-- XercesRegExpEvaluator
/**
* Sets the regular expression to match against during
* a call to #matches
*
* @param rexpr the regular expression
**/
public void setExpression(String rexpr) {
if (rexpr != null) {
try {
_regexp = _constructor.newInstance(new Object[] { BOL + rexpr + EOL } );
} catch (Exception e) {
LOG.error("Problem invoking constructor on " + CLASS_NAME, e);
String err = "XercesRegExp Syntax error: "
+ e.getMessage()
+ " ; error occured with the following "
+ "regular expression: " + rexpr;
throw new IllegalArgumentException(err);
}
} else {
_regexp = null;
}
} //-- setExpression
/**
* Returns true if the given String is matched by the
* regular expression of this RegExpEvaluator
*
* @param value the String to check the production of
* @return true if the given string matches the regular
* expression of this RegExpEvaluator
* @see #setExpression
**/
public boolean matches(String value)
{
if (_regexp != null) {
// return _regexp.matches(value);
Method method;
try {
method = _regexp.getClass().getMethod("matches", new Class[] { String.class } );
return ((Boolean) method.invoke(_regexp, new Object[] { value } )).booleanValue();
} catch (SecurityException e) {
LOG.error("Security problem accessing matches(String) method of class " + CLASS_NAME, e);
} catch (NoSuchMethodException e) {
LOG.error("Method matches(String) of class " + CLASS_NAME + " could not be found.", e);
} catch (IllegalArgumentException e) {
LOG.error("Invalid argument provided to method matches(String) of class " + CLASS_NAME, e);
} catch (IllegalAccessException e) {
LOG.error("Illegal acces to method matches(String) of class " + CLASS_NAME, e);
} catch (InvocationTargetException e) {
LOG.error("Invalid invocation of method matches(String) of class " + CLASS_NAME, e);
}
}
return true;
} //-- matches
} //-- XercesRegExpEvaluator