org.springframework.aop.support.JdkRegexpMethodPointcut Maven / Gradle / Ivy
/*
* Copyright 2002-2006 the original author or authors.
*
* Licensed 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.springframework.aop.support;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
* Java 1.4+ regular expression pointcut. JavaBean properties are:
*
* - pattern: Java 1.4 regular expression for the fully-qualified method names to match
*
- patterns: alternative property taking a String array of patterns. The result will
* be the union of these patterns.
*
*
* Note: the regular expressions must be a match. For example,
* .*get.* will match com.mycom.Foo.getBar().
* get.* will not.
*
*
Requires JDK 1.4+, as it builds on the java.util.regex package.
* As alternative on JDK 1.3 or for Perl5-style regular expression parsing,
* consider Perl5RegexpMethodPointcut.
*
* @author Dmitriy Kopylenko
* @author Rob Harrop
* @since 1.1
* @see Perl5RegexpMethodPointcut
*/
public class JdkRegexpMethodPointcut extends AbstractRegexpMethodPointcut {
/**
* Java 1.4 compiled form of the patterns.
*/
private transient Pattern[] compiledPatterns = new Pattern[0];
/**
* Java 1.4 compiled form of the exclusion patterns.
*/
private transient Pattern[] compiledExclusionPatterns = new Pattern[0];
/**
* Initialize Java 1.4 {@link Pattern Patterns} from the supplied String[].
*/
protected void initPatternRepresentation(String[] patterns) throws PatternSyntaxException {
this.compiledPatterns = compilePatterns(patterns);
}
/**
* Returns true if the {@link Pattern} at index patternIndex
* matches the supplied candidate String.
*/
protected boolean matches(String pattern, int patternIndex) {
Matcher matcher = this.compiledPatterns[patternIndex].matcher(pattern);
return matcher.matches();
}
/**
* Initialize Java 1.4 exclusion {@link Pattern Patterns} from the supplied String[].
*/
protected void initExcludedPatternRepresentation(String[] excludedPatterns) throws IllegalArgumentException {
this.compiledExclusionPatterns = compilePatterns(excludedPatterns);
}
/**
* Returns true if the exclusion {@link Pattern} at index patternIndex
* matches the supplied candidate String.
*/
protected boolean matchesExclusion(String candidate, int patternIndex) {
Matcher matcher = this.compiledExclusionPatterns[patternIndex].matcher(candidate);
return matcher.matches();
}
/**
* Compiles the supplied String[] into an array of
* {@link Pattern} objects and returns that array.
*/
private Pattern[] compilePatterns(String[] source) {
Pattern[] destination = new Pattern[source.length];
for (int i = 0; i < source.length; i++) {
destination[i] = Pattern.compile(source[i]);
}
return destination;
}
}