/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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.seasar.framework.container.assembler;
import java.lang.reflect.Constructor;
import org.seasar.framework.container.ComponentDef;
import org.seasar.framework.container.util.BindingUtil;
import org.seasar.framework.util.ConstructorUtil;
/**
* コンストラクタアセンブラの自動版です。
*
* @author higa
*
*/
public class AutoConstructorAssembler extends AbstractConstructorAssembler {
/**
* {@link AutoConstructorAssembler}を作成します。
*
* @param componentDef
*/
public AutoConstructorAssembler(ComponentDef componentDef) {
super(componentDef);
}
protected Object doAssemble() {
Constructor constructor = getSuitableConstructor();
if (constructor == null) {
return assembleDefault();
}
Object[] args = getArgs(constructor.getParameterTypes());
return ConstructorUtil.newInstance(constructor, args);
}
/**
* 適した {@link Constructor}を返します。
*
* @return 適した {@link Constructor}
*/
protected Constructor getSuitableConstructor() {
int argSize = -1;
Constructor constructor = null;
Constructor[] constructors = getComponentDef().getConcreteClass()
.getConstructors();
for (int i = 0; i < constructors.length; ++i) {
int tempArgSize = constructors[i].getParameterTypes().length;
if (tempArgSize == 0) {
return null;
}
if (tempArgSize > argSize
&& BindingUtil.isAutoBindable(constructors[i]
.getParameterTypes())) {
constructor = constructors[i];
argSize = tempArgSize;
}
}
return constructor;
}
}