grails.plugin.springevents.ProxyUtils.java Source code

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Here is the source code for grails.plugin.springevents.ProxyUtils.java

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/*
 * Copyright 2010 Luke Daley
 *
 * 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 grails.plugin.springevents;

import org.springframework.aop.*;
import org.springframework.aop.framework.*;
import org.springframework.aop.target.*;
import org.springframework.util.*;

public abstract class ProxyUtils {

    public static Object ultimateTarget(Object candidate) {
        Assert.notNull(candidate, "Candidate object must not be null");
        Object current = candidate;
        while (current instanceof TargetClassAware) {
            Object nested = null;
            if (current instanceof Advised) {
                TargetSource targetSource = ((Advised) current).getTargetSource();
                if (targetSource instanceof SingletonTargetSource) {
                    nested = ((SingletonTargetSource) targetSource).getTarget();
                }
            }
            current = nested;
        }
        return current;
    }
}