org.snaker.engine.impl.SimpleContext Maven / Gradle / Ivy
/* Copyright 2012-2013 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.snaker.engine.impl;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.snaker.engine.Context;
import org.snaker.engine.cfg.Configuration;
import org.snaker.engine.helper.ClassHelper;
/**
* 简单的服务查找实现类，由 {@link Configuration}设置
* @author yuqs
* @since 1.5
*/
public class SimpleContext implements Context {
/**
* 上下文注册的配置对象
*/
private Map contextMap = new HashMap();
/**
* 根据服务名称查找对象
* @param name
* @return
*/
public boolean exist(String name) {
return contextMap.get(name) != null;
}
/**
* 对外部提供的查找对象方法，根据class类型查找
* @param clazz
* @return
*/
public T find(Class clazz) {
for (Entry entry : contextMap.entrySet()) {
if (clazz.isInstance(entry.getValue())) {
return clazz.cast(entry.getValue());
}
}
return null;
}
/**
* 对外部提供的查找对象实例列表方法，根据class类型查找
* @param clazz
* @return
*/
public List findList(Class clazz) {
List list = new ArrayList();
for (Entry entry : contextMap.entrySet()) {
if (clazz.isInstance(entry.getValue())) {
list.add(clazz.cast(entry.getValue()));
}
}
return list;
}
/**
* 对外部提供的查找对象方法，根据名称、class类型查找
* @param name
* @param clazz
* @return
*/
public T findByName(String name, Class clazz) {
for (Entry entry : contextMap.entrySet()) {
if (entry.getKey().equals(name) && clazz.isInstance(entry.getValue())) {
return clazz.cast(entry.getValue());
}
}
return null;
}
/**
* 对外部提供的put方法
* @param name
* @param object
*/
public void put(String name, Object object) {
contextMap.put(name, object);
}
/**
* 对外部提供的put方法
* @param name
* @param clazz
*/
public void put(String name, Class clazz) {
contextMap.put(name, ClassHelper.instantiate(clazz));
}
}