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/**
* 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
* [email protected].
*
* 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;
/**
* An implementation of the XercesRegExpEvaluator that uses the Regular Expression library in
* Xerces. For more information about the Xerces Regular Expression library please visit:
*
* http://xml.apache.org/xerces-j/apiDocs/org/apache/xerces/utils/regex/RegularExpression.html
*
* @author Keith Visco
* @author Takashi Okamoto
* @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.impl.xpath.regex.RegularExpression";
private static final String OLD_CLASS_NAME = "org.apache.xerces.utils.regex.RegularExpression";
/**
* The Regular expression
**/
// RegularExpression _regexp = null;
Object _regexp = null;
private Constructor _constructor;
/**
* Name of the actual class used for regular expression matching.
*/
private String className;
/**
* Creates a new XercesRegExpEvaluator
**/
public XercesRegExpEvaluator() {
super();
Class regexpClass = null;
try {
regexpClass = Class.forName(CLASS_NAME);
_constructor = regexpClass.getConstructor(new Class[] {String.class});
className = CLASS_NAME;
} catch (ClassNotFoundException e) {
try {
regexpClass = Class.forName(OLD_CLASS_NAME);
_constructor = regexpClass.getConstructor(new Class[] {String.class});
className = OLD_CLASS_NAME;
} catch (ClassNotFoundException e2) {
LOG.error("Problem loading class " + this.className, e2);
throw new IllegalAccessError(
"Problem loading class " + this.className + ": " + e.getMessage());
} catch (SecurityException e2) {
LOG.error("Problem accessing constructor of class " + this.className, e2);
throw new IllegalAccessError(
"Problem accessing constructor of class " + this.className + ": " + e.getMessage());
} catch (NoSuchMethodException e2) {
LOG.error("Problem locating constructor of class " + this.className, e2);
throw new IllegalAccessError("class " + this.className + ": " + e.getMessage());
}
} catch (SecurityException e) {
LOG.error("Problem accessing constructor of class " + this.className, e);
throw new IllegalAccessError(
"Problem accessing constructor of class " + this.className + ": " + e.getMessage());
} catch (NoSuchMethodException e) {
LOG.error("Problem locating constructor of class " + this.className, e);
throw new IllegalAccessError("class " + this.className + ": " + 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 " + this.className, 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 " + this.className,
e);
} catch (NoSuchMethodException e) {
LOG.error("Method matches(String) of class " + this.className + " could not be found.", e);
} catch (IllegalArgumentException e) {
LOG.error("Invalid argument provided to method matches(String) of class " + this.className,
e);
} catch (IllegalAccessException e) {
LOG.error("Illegal acces to method matches(String) of class " + this.className, e);
} catch (InvocationTargetException e) {
LOG.error("Invalid invocation of method matches(String) of class " + this.className, e);
}
}
return true;
} // -- matches
} // -- XercesRegExpEvaluator