org.springframework.beans.factory.support.ReplaceOverride Maven / Gradle / Ivy
/*
* Copyright 2002-2005 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.beans.factory.support;
import java.lang.reflect.Method;
import java.util.LinkedList;
import java.util.List;
/**
* Extension of MethodOverride that represents an arbitrary
* override of a method by the IoC container.
*
* Any non-final method can be overridden, irrespective of its
* parameters and return types.
*
* @author Rod Johnson
* @since 1.1
*/
public class ReplaceOverride extends MethodOverride {
private final String methodReplacerBeanName;
/**
* List of String. Identifying signatures.
*/
private List typeIdentifiers = new LinkedList();
/**
* Construct a new ReplaceOverride.
* @param methodName the name of the method to override
* @param methodReplacerBeanName the bean name of the MethodReplacer
*/
public ReplaceOverride(String methodName, String methodReplacerBeanName) {
super(methodName);
this.methodReplacerBeanName = methodReplacerBeanName;
}
/**
* Add a fragment of a class string, like "Exception"
* or "java.lang.Exc", to identify a parameter type
* @param s substring of class FQN
*/
public void addTypeIdentifier(String s) {
this.typeIdentifiers.add(s);
}
public boolean matches(Method method) {
// TODO could cache result for efficiency
if (!method.getName().equals(getMethodName())) {
// it can't match
return false;
}
if (!isOverloaded()) {
// No overloaded: don't worry about arg type matching.
return true;
}
// If we get to here, we need to insist on precise argument matching.
if (this.typeIdentifiers.size() != method.getParameterTypes().length) {
return false;
}
for (int i = 0; i < this.typeIdentifiers.size(); i++) {
String identifier = (String) this.typeIdentifiers.get(i);
if (method.getParameterTypes()[i].getName().indexOf(identifier) == -1) {
// This parameter cannot match.
return false;
}
}
return true;
}
/**
* Return the name of the bean implementing MethodReplacer.
*/
public String getMethodReplacerBeanName() {
return methodReplacerBeanName;
}
public String toString() {
return "Replace override for method '" + getMethodName() + "; will call bean '" +
this.methodReplacerBeanName + "'";
}
}