defaultcachecontroller.java

采用tapestry的简单OA系统

package com.ejsun.entapps.core.cache;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.ejsun.entapps.domain.Entity;

/**
 * Default Cache Controller for Entity Cache;
 * @author	Quake Wang
 * @since	2004-5-18
 * @version $Revision: 1.1 $
 * 
 **/

public class DefaultCacheController implements CacheController {
	private Map cacheNames;

	public String getCacheName(Method method) {
		String invocationSignature =
			method.getDeclaringClass().getName() + "." + method.getName();
		String cacheName = (String) cacheNames.get(invocationSignature);
		if (cacheName == null)
			throw new CacheException(
				"can not find the cache name with invocation: "
					+ invocationSignature);
		return cacheName;
	}

	public String getCacheKey(Method method, Object[] args) {
		StringBuffer result = new StringBuffer();
		for (int i = 0; i < args.length; i++) {
			if (args[i] instanceof Entity) {
				result
					.append("[")
					.append(args[i].getClass().getName())
					.append(":")
					.append(((Entity) args[i]).getId())
					.append("]");
			} else {
				result.append("[").append(args[i]).append("]");
			}
		}
		return result.toString();
	}

	public List getRelativeCaches(Method method, Object[] args) {
		List result = new ArrayList();
		String invocationSignature =
			method.getDeclaringClass().getName() + "." + method.getName();
		String cacheName = (String) cacheNames.get(invocationSignature);
		if (cacheName != null)
			result.add(cacheName);
		return result;
	}

	public void setCacheNames(Map map) {
		cacheNames = map;
	}

}