com.github.glue.mvc.general.DefaultContainer.java Source code

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Here is the source code for com.github.glue.mvc.general.DefaultContainer.java

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/*
 * Copyright Eric Lee.
 *
 * 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 com.github.glue.mvc.general;

import java.util.Map;
import java.util.Set;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.github.glue.mvc.Container;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

/**
 * @author Eric.Lee
 *
 */
public class DefaultContainer implements Container {
    private static final Logger log = LoggerFactory.getLogger(DefaultContainer.class);
    private Map<String, Object> context = Maps.newLinkedHashMap();

    /* (non-Javadoc)
     * @see com.github.glue.mvc.IocContainer#getInstance(java.lang.Class)
     */
    @Override
    public <T> T getInstance(Class<T> type) {
        for (Map.Entry<String, Object> entry : context.entrySet()) {
            Object instance = entry.getValue();
            if (type.isInstance(instance)) {
                return (T) instance;
            }
        }
        try {
            return type.newInstance();
        } catch (Exception e) {
        }
        return null;
    }

    public <T> Set<T> getInstances(Class<T> type) {
        Set<T> instances = Sets.newLinkedHashSet();
        for (Map.Entry<String, Object> entry : context.entrySet()) {
            Object instance = entry.getValue();
            if (type.isInstance(instance)) {
                instances.add((T) instance);
            }
        }
        return instances;
    }

    public void bind(String id, Object instance) {
        context.put(id, instance);
        log.debug("bind id:{}, instance:{}", id, instance);
    }

}