/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class AdvicePoint {
	
	private Log log = LogFactory.getLog(this.getClass());
	
	private String point;
	
	private Object classInstance;
	
	private Module module;
	
	private String className;
	
	public AdvicePoint() {
	}
	
	public AdvicePoint(String point, Class<?> clazz) {
		this.point = point;
		try {
			this.classInstance = clazz.newInstance();
		}
		catch (Exception e) {
			log.error("Unable to get instance of: " + clazz.getName(), e);
		}
	}
	
	public AdvicePoint(Module mod, String point, String className) {
		this.point = point;
		this.module = mod;
		this.className = className;
	}
	
	public String getPoint() {
		return point;
	}
	
	/**
	 * @return the classInstance
	 */
	public Object getClassInstance() {
		if (classInstance != null)
			return classInstance;
		
		Object o = null;
		try {
			Class<?> c = ModuleFactory.getModuleClassLoader(getModule()).loadClass(getClassName());
			o = c.newInstance();
		}
		catch (Exception e) {
			log.warn("Could not get instance for advice point: " + point, e);
		}
		classInstance = o;
		return o;
	}
	
	/**
	 * @return the className
	 */
	public String getClassName() {
		return className;
	}
	
	/**
	 * @return the module
	 */
	public Module getModule() {
		return module;
	}
	
	public void disposeClassInstance() {
		classInstance = null;
	}
}