/*
* $Id: RegexpDefinitionPatternMatcher.java 795343 2009-07-18 11:26:09Z apetrelli $
*
* 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.tiles.definition.pattern.regexp;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.tiles.Definition;
import org.apache.tiles.definition.pattern.DefinitionPatternMatcher;
import org.apache.tiles.definition.pattern.PatternUtil;
/**
* Matches regular expression patterns in definitions.
*
* @version $Rev: 795343 $ $Date: 2009-07-18 13:26:09 +0200 (sab, 18 lug 2009) $
* @since 2.2.0
*/
public class RegexpDefinitionPatternMatcher implements DefinitionPatternMatcher {
/**
* The pattern to match.
*/
private Pattern pattern;
/**
* The definition to use as a basis.
*/
private Definition definition;
/**
* Constructor.
*
* @param pattern The pattern to use, in string form.
* @param definition The definition to use as a basis.
* @since 2.2.0
*/
public RegexpDefinitionPatternMatcher(String pattern, Definition definition) {
this.pattern = Pattern.compile(pattern);
this.definition = definition;
}
/** {@inheritDoc} */
public Definition createDefinition(String definitionName) {
Definition retValue = null;
Matcher matcher = pattern.matcher(definitionName);
if (matcher.matches()) {
int groupCount = matcher.groupCount() + 1;
Object[] vars = new Object[groupCount];
for (int i = 0; i < groupCount; i++) {
vars[i] = matcher.group(i);
}
retValue = PatternUtil.replacePlaceholders(definition,
definitionName, vars);
}
return retValue;
}
}
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