BehaviourMethod.java

/*
 * Copyright (c) 2011 Talis Inc., Some rights reserved.
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 *   be used to endorse or promote products derived from this software without
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 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package org.openrdf.repository.object.composition.helpers;

import java.lang.reflect.Method;

import org.openrdf.annotations.ParameterTypes;
import org.openrdf.annotations.Precedes;
import org.openrdf.repository.object.advice.Advice;
import org.openrdf.repository.object.composition.BehaviourFactory;

/**
 * Represents an aspect in a behaviour class.
 *
 * @author James Leigh
 **/
public class BehaviourMethod {
	private final BehaviourFactory factory;
	private final Method method;

	public BehaviourMethod(BehaviourFactory behaviour, Method method) {
		assert behaviour != null;
		assert method != null;
		this.factory = behaviour;
		this.method = method;
	}

	public BehaviourFactory getFactory() {
		return factory;
	}

	public Method getMethod() {
		return method;
	}

	public boolean isMessage() {
		return method.isAnnotationPresent(ParameterTypes.class)
				|| method.getDeclaringClass().equals(Advice.class);
	}

	public boolean isEmptyOverridesPresent() {
		Precedes ann = factory.getBehaviourType().getAnnotation(Precedes.class);
		if (ann == null)
			return false;
		Class<?>[] values = ann.value();
		return values != null && values.length == 0;
	}

	public boolean precedes(BehaviourMethod b1) {
		return factory.precedes(getMethod(), b1.getFactory(), b1.getMethod());
	}

	@Override
	public String toString() {
		return factory.toString();
	}
}