MapInstanceLocator.java

package org.dayatang.domain.internal.bean;

import org.dayatang.domain.InstanceLocator;

import java.lang.annotation.Annotation;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by yyang on 15/1/14.
 */
public class MapInstanceLocator implements InstanceLocator {

    private Map<Object, Object> instances = new HashMap<Object, Object>();

    public MapInstanceLocator(Map<Object, Object> instances) {
        this.instances = instances;
    }

    @Override
    public <T> T getInstance(Class<T> beanType) {
        return (T) instances.get(beanType);
    }

    @Override
    public <T> T getInstance(Class<T> beanType, String beanName) {
        return (T) instances.get(toName(beanType, beanName));
    }

    @Override
    public <T> T getInstance(Class<T> beanType, Class<? extends Annotation> annotationType) {
        return (T) instances.get(toName(beanType, annotationType));
    }

    private static String toName(Class<?> beanType, String beanName) {
        return beanType.getName() + ":" + beanName;
    }

    private static String toName(Class<?> beanType, Class<? extends Annotation> annotationType) {
        return beanType.getName() + ":" + annotationType.getName();
    }
}