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/*
 * Copyright (c) 2019 coodex.org ([email protected])
 *
 * 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.coodex.mock;

import org.coodex.util.Common;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public abstract class AbstractRelationStrategy implements RelationStrategy {

    private String[] strategies = null;

    @Override
    public final boolean accept(String strategyName) {
        if (strategies == null) {
            synchronized (this) {
                if (strategies == null) {
                    Class c = getClass();
                    List list = new ArrayList();
                    for (Method method : c.getMethods()) {
                        Strategy strategy = method.getAnnotation(Strategy.class);
                        if (strategy != null) {
                            list.add(strategy.value());
                        }
                    }
                    strategies = list.toArray(new String[0]);
                }
            }
        }
        return Common.inArray(strategyName, strategies);
    }
}