actionsmanager.java

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// 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.ComboKey;
import com.onetsoft.fastjsp.util.StringUtils;
import com.onetsoft.fastjsp.util.UCIGenerator;
import com.onetsoft.fastjsp.valid.ValidationException;

import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;


class ActionsManager {

    private Map urlActionPool = new HashMap(2);
    private Map formActionPool = new HashMap(2);

    public ActionsManager(Class pageClass) {
        initActionManagers(pageClass);
    }

    private void initActionManagers(Class pageClass) {
        try {
            initializeComponentActions(getInitComponentInstance(pageClass), new UCIGenerator());
        } catch (InstantiationException e) {
            throw new ApplicationRuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new ApplicationRuntimeException(e);
        } catch (NoSuchMethodException e) {
            throw new ApplicationRuntimeException(e);
        } catch (InvocationTargetException e) {
            throw new ApplicationRuntimeException(e);
        }
    }

    private static AbstractComponent getInitComponentInstance(Class componentClass) throws IllegalAccessException, InstantiationException {
        return (AbstractComponent) componentClass.newInstance();
    }

    /**
     * 初始化当前组件及下属组件的url actions
     *
     * @param component
     * @param uci
     * @throws IllegalAccessException
     * @throws InstantiationException
     */
    private void initializeComponentActions(AbstractComponent component, UCIGenerator uci) throws IllegalAccessException, InstantiationException, NoSuchMethodException, InvocationTargetException {
        uci.next();

        //load url actions for each component
        ComboKey key = new ComboKey(uci.getValue(), component.getClass());
        urlActionPool.put(key, loadUrlActionManager(component));

        //load form actions for each component
        formActionPool.put(key, loadFormActionManager(component));

        //init children components' url actions
        Class[] a = component.getComponents();
        if (a == null)
            return;
        for (int i = 0; i < a.length; i++) {
            initializeComponentActions(getInitComponentInstance(a[i]), uci);
        }
    }

    private UrlActionManager loadUrlActionManager(AbstractComponent component) {
        return new UrlActionManager(component);
    }

    private FormActionManager loadFormActionManager(AbstractComponent component) {
        return new FormActionManager(component);
    }


    /**
     * 获取表单实例
     *
     * @param key
     * @param formName
     * @return
     */
    AbstractForm getFormInstance(ComboKey key, String formName) {
        return ((FormActionManager) formActionPool.get(key)).getForm(formName);
    }


    /**
     * 执行任何可能存在的action
     * 注：
     * 1.url传入的action参数名为action
     * 2.表单传入的action参数名为action_XXXX。此名称为提交button的"name"
     * 同时应注意大小写敏感
     *
     * @param pageService
     * @see com.onetsoft.fastjsp.Configuration#getActionName() 页面 action 名称配置
     */
    void execute(AbstractPageService pageService) throws ApplicationRuntimeException {
        try {
             //执行可能存在的 form action
            if (pageService.formRequest) {
                if (!StringUtils.isEmpty(pageService.data.getString(StringUtils.FORM)))         //  throw new IllegalArgumentException("Cannot find form action parameter \"form\" ,forget to set ?");
                    executeFormAction(pageService.cycle);
            }
            //执行可能存在的 url action
            else {               
                if (checkActionExists(pageService)) {
                    executeUrlAction(pageService);
                }
            }
        } catch (ApplicationRuntimeException e) {
            if (e.getCause() instanceof ValidationException) {
                pageService.delegateCombo.addDelegate(((ValidationException) e.getCause()).getDelegate());
            } else
                throw e;
        }
    }

    /**
     * url传入的action参数名为action
     *
     * @param pageService
     * @return
     */
    private static boolean checkActionExists(AbstractPageService pageService) {
        return pageService.data.getString(pageService.servicer.module.actionName).length() > 0;
    }


    /**
     * 执行url action
     *
     * @param pageService
     */
    private void executeUrlAction(AbstractPageService pageService) {
        int uci = pageService.data.getInt(LinkImpl.UCI, 0);
        if (uci == -1) return;
        ComboKey k = new ComboKey(uci, null);
        UrlActionManager manager = (UrlActionManager) urlActionPool.get(k);
        if (manager != null)
            manager.executeAction(pageService.cycle);
    }

    /**
     * 执行 form action
     *
     * @param cycle
     */
    private void executeFormAction(AbstractPageCycle cycle) {
        int uci = cycle.service.data.getInt(LinkImpl.UCI, 0);
        ComboKey k = new ComboKey(uci, null);
        FormActionManager manager = (FormActionManager) formActionPool.get(k);
        if (manager != null)
            manager.executeAction(cycle);
    }

}