org.springframework.aop.aspectj.DeclareParentsAdvisor 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.aspectj;
import org.aopalliance.aop.Advice;
import org.springframework.aop.ClassFilter;
import org.springframework.aop.IntroductionAdvisor;
import org.springframework.aop.support.ClassFilters;
import org.springframework.aop.support.DelegatePerTargetObjectIntroductionInterceptor;
/**
* Introduction advisor delegating to the given object.
* Implements AspectJ annotation-style behavior for the DeclareParents annotation.
*
* @author Rod Johnson
* @since 2.0
*/
public class DeclareParentsAdvisor implements IntroductionAdvisor {
private final Class introducedInterface;
private final ClassFilter typePatternClassFilter;
private final Advice advice;
/**
* Create a new advisor for this DeclareParents field.
* @param interfaceType static field defining the introduction
* @param typePattern type pattern the introduction is restricted to
* @param defaultImpl default implementation class
*/
public DeclareParentsAdvisor(Class interfaceType, String typePattern, Class defaultImpl) {
this.introducedInterface = interfaceType;
ClassFilter typePatternFilter = new TypePatternClassFilter(typePattern);
// Excludes methods implemented.
ClassFilter exclusion = new ClassFilter() {
public boolean matches(Class clazz) {
return !(introducedInterface.isAssignableFrom(clazz));
}
};
this.typePatternClassFilter = ClassFilters.intersection(typePatternFilter, exclusion);
this.advice = new DelegatePerTargetObjectIntroductionInterceptor(defaultImpl, interfaceType);
}
public ClassFilter getClassFilter() {
return this.typePatternClassFilter;
}
public void validateInterfaces() throws IllegalArgumentException {
// Do nothing
}
public boolean isPerInstance() {
return true;
}
public Advice getAdvice() {
return advice;
}
public Class[] getInterfaces() {
return new Class[] {this.introducedInterface};
}
}