src/main/java/org/apache/commons/proxy/interceptor/filter/ReturnTypeFilter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.proxy.interceptor.filter;

import org.apache.commons.proxy.interceptor.MethodFilter;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

/**
 * Filters methods based on their return type.
 *
 * @author James Carman
 * @since 1.0
 */
public class ReturnTypeFilter implements MethodFilter
{
//**********************************************************************************************************************
// Fields
//**********************************************************************************************************************

    private final Set validReturnTypes = new HashSet();

//**********************************************************************************************************************
// Constructors
//**********************************************************************************************************************

    public ReturnTypeFilter( Class[] validReturnTypes )
    {
        this(Arrays.asList(validReturnTypes));
    }

    public ReturnTypeFilter( Collection validReturnTypes )
    {
        this.validReturnTypes.addAll(validReturnTypes);
    }

//**********************************************************************************************************************
// MethodFilter Implementation
//**********************************************************************************************************************


    public boolean accepts( Method method )
    {
        return validReturnTypes.contains(method.getReturnType());
    }
}