urlactionmanager.java

欢迎使用 FastJsp 开发框架! 编译说明： * 若要生成Api Javadoc文档

// Copyright 2005-2007 onetsoft.com
//
// 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.onetsoft.fastjsp;

import com.onetsoft.fastjsp.util.ResourceResolver;
import com.onetsoft.fastjsp.util.StringUtils;

import java.util.HashMap;
import java.util.Map;

/**
 * Url action管理
 *
 * @author <a href="mailto:[e-mail]">hgw</a>
 */
class UrlActionManager implements ActionManager {
    private final Map pool = new HashMap(2);                   //key:actionName  value:action
    private String componentPkg = null;

    public UrlActionManager(AbstractComponent component) {
        this.componentPkg = component.getClass().getPackage().getName();
    }

    private final static String URL = "url";

    private Class findActionClass(String actionName) {
        try {
            String className = new StringBuffer(96).append(componentPkg)
                    .append('.').append(URL).append('.').
                    append(StringUtils.firstCharUpper(actionName)).toString();
            return ResourceResolver.forName(className);
        } catch (Exception e) {
            /*e.printStackTrace();*/
            return null;
        }
    }

    private Class findAction(String action) {
        Class cl = (Class) pool.get(action);
        if (cl == null) {
            synchronized (action.intern()) {
                cl = (Class) pool.get(action);
                if (cl == null) {
                    cl = findActionClass(action);
                    if (cl != null) {
                        synchronized (pool) {
                            pool.put(action, cl);
                        }
                    }
                }
            }
        }
        return cl;
    }


    public void executeAction(AbstractPageCycle cycle) {
        try {
            Class cl = findAction(cycle.service.data.getString(cycle.service.servicer.module.actionName));
            if (cl != null) {
                AbstractAction a = (AbstractAction) cl.newInstance();
                a.setCycle(cycle);
                a.execute();
            }
        } catch (InstantiationException e) {
            throw new ApplicationRuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new ApplicationRuntimeException(e);
        } catch (NullPointerException e) {
            throw new ApplicationRuntimeException(e);
        }
    }
}