usertargetmetadeffactory.java

一个非常好的FRAMWRK!是一个外国组织做的!不!

/*
 * Copyright 2003-2005 the original author or authors.
 * 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 com.jdon.container.access;

import javax.servlet.http.HttpServletRequest;

import com.jdon.bussinessproxy.TargetMetaDef;
import com.jdon.bussinessproxy.config.TargetMetaDefLoader;
import com.jdon.container.ContainerWrapper;
import com.jdon.container.finder.ComponentKeys;
import com.jdon.container.finder.ServletContainerFinder;
import com.jdon.container.visitor.ComponentVisitor;
import com.jdon.container.visitor.VisitorFactory;
import com.jdon.util.Debug;

/**
 * @author <a href="mailto:[e-mail]">banq</a>
 *
 */
public class UserTargetMetaDefFactory {
    private final static String module = UserTargetMetaDefFactory.class.getName();
    
    private static ServletContainerFinder servletContainerFinder = new ServletContainerFinder(); 
    
    public static TargetMetaDef getTargetMetaDef(String name, ContainerWrapper cw){
        TargetMetaDefLoader targetMetaDefLoader = (TargetMetaDefLoader) cw.lookup(ComponentKeys.SERVICE_METALOADER_NAME);
        TargetMetaDef targetMetaDef = targetMetaDefLoader.getTargetMetaDef(name);
        if (targetMetaDef == null){
            Debug.logError(" not found service definition in jdonframework.xml for " + name, module);
            return null;
        }
        return targetMetaDef;
    }

    /**
     * create a UserTargetMetaDef instance.
     * 
     * @param containerWrapper
     * @param targetMetaDef
     * @param request
     * @return
     */
    public static TargetMetaRequest create(TargetMetaDef targetMetaDef, 
                                           HttpServletRequest request){  
        ContainerWrapper containerWrapper = servletContainerFinder.findContainer(request);
        TargetMetaRequest targetMetaRequest = new TargetMetaRequest(targetMetaDef);
        VisitorFactory visitorFactory = (VisitorFactory)containerWrapper.lookup(ComponentKeys.VISITOR_FACTORY);
        ComponentVisitor cm = visitorFactory.getVisitor(request, targetMetaRequest.getTargetMetaDef());
        targetMetaRequest.setComponentVisitor(cm);
        return targetMetaRequest;
    }
    

}