org.springframework.aop.support.Perl5RegexpMethodPointcut 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 org.apache.oro.text.regex.MalformedPatternException;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;
/**
* Perl5-style regular expression pointcut. JavaBean properties are:
*
* - pattern: Perl5 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.
*
*
Currently uses the Jakarta ORO
* regular expression library. Does not require JDK 1.4+, in contrast to
* JdkRegexpMethodPointcut.
*
* @author Rod Johnson
* @author Rob Harrop
* @since 1.1
* @see JdkRegexpMethodPointcut
*/
public class Perl5RegexpMethodPointcut extends AbstractRegexpMethodPointcut {
/**
* ORO's compiled form of this pattern.
* ORO fields are transient as they're not serializable.
* They will be reinitialized on deserialization by
* the initPatternRepresentation() method.
*/
private transient Pattern[] compiledPatterns = new Pattern[0];
private transient Pattern[] compiledExclusionPatterns = new Pattern[0];
/** ORO pattern matcher to use */
private transient PatternMatcher matcher;
/**
* Initializes the {@link Pattern ORO representation} of the supplied exclusion patterns.
*/
protected void initPatternRepresentation(String[] patterns) throws IllegalArgumentException {
this.compiledPatterns = compilePatterns(patterns);
this.matcher = new Perl5Matcher();
}
/**
* Returns true if the {@link Pattern} at index patternIndex
* matches the supplied candidate String.
*/
protected boolean matches(String pattern, int patternIndex) {
return this.matcher.matches(pattern, this.compiledPatterns[patternIndex]);
}
/**
* Initializes the {@link Pattern ORO representation} of the supplied exclusion patterns.
*/
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 pattern, int patternIndex) {
return this.matcher.matches(pattern, this.compiledExclusionPatterns[patternIndex]);
}
/**
* Compiles the supplied pattern sources into a {@link Pattern} array.
*/
private Pattern[] compilePatterns(String[] source) {
Perl5Compiler compiler = new Perl5Compiler();
Pattern[] destination = new Pattern[source.length];
for (int i = 0; i < source.length; i++) {
// compile the pattern to be thread-safe
try {
destination[i] = compiler.compile(source[i], Perl5Compiler.READ_ONLY_MASK);
}
catch (MalformedPatternException ex) {
throw new IllegalArgumentException(ex.getMessage());
}
}
return destination;
}
}