ReflectManager.java

package com.github.ompc.greys.core.manager;

import com.github.ompc.greys.core.ClassDataSource;
import com.github.ompc.greys.core.manager.impl.DefaultReflectManager;
import com.github.ompc.greys.core.util.GaMethod;
import com.github.ompc.greys.core.util.matcher.Matcher;

import java.util.Collection;

/**
 * 反射操作管理类
 * Created by oldmanpushcart@gmail.com on 15/11/1.
 */
public interface ReflectManager {

    /**
     * 搜索类
     *
     * @param classMatcher 类匹配
     * @return 返回匹配的类集合
     */
    Collection<Class<?>> searchClass(Matcher<Class<?>> classMatcher);

    /**
     * 搜索目标类的所有子类
     *
     * @param targetClass 目标类
     * @return 返回匹配的类集合
     */
    Collection<Class<?>> searchSubClass(Class<?> targetClass);

    /**
     * 搜索类极其子类
     *
     * @param classMatcher 类匹配
     * @return 返回匹配的类集合
     */
    Collection<Class<?>> searchClassWithSubClass(Matcher<Class<?>> classMatcher);

    /**
     * 搜索目标类的所有可见匹配方法
     *
     * @param targetClass     目标类
     * @param gaMethodMatcher 方法匹配
     * @return 返回匹配的方法集合
     */
    Collection<GaMethod> searchClassGaMethods(Class<?> targetClass, Matcher<GaMethod> gaMethodMatcher);

    class Factory {

        private volatile static ReflectManager instance = null;

        public static ReflectManager initInstance(final ClassDataSource classDataSource) {
            if (null == instance) {
                synchronized (ReflectManager.class) {
                    if (null == instance) {
                        instance = new DefaultReflectManager(classDataSource);
                    }
                }
            }
            return instance;
        }

        public static ReflectManager getInstance() {
            if (null == instance) {
                synchronized (ReflectManager.class) {
                    if (null == instance) {
                        throw new IllegalStateException("not init yet.");
                    }
                }
            }
            return instance;
        }
    }

}