/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.spring;

import java.util.Collections;
import java.util.List;
import org.aopalliance.aop.Advice;
import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.aop.aspectj.annotation.AspectJProxyFactory;
import org.springframework.beans.factory.annotation.Required;
import org.springframework.core.OrderComparator;

/**
 * Apply AOP Aspect(s) to the object returned by the invoked method.
 *
 */
public class AspectApplyingAspect {
    private List<Advice> advices;

    @Required
    public void setAdvices(List<Advice> advices) {
        this.advices = advices;
        Collections.sort(this.advices, OrderComparator.INSTANCE);
    }

    public Object applyAspect(ProceedingJoinPoint pjp) throws Throwable {
        final Object result = pjp.proceed();
        if (result == null) {
            return result;
        }

        final AspectJProxyFactory portletPreferencesProxyFactory = new AspectJProxyFactory(result);

        for (final Advice advice : this.advices) {
            portletPreferencesProxyFactory.addAdvice(advice);
        }

        return portletPreferencesProxyFactory.getProxy();
    }
}