actioncontextbase.java.svn-base

MVC开源框架

/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.struts.chain.contexts;

import org.apache.commons.chain.Context;
import org.apache.commons.chain.impl.ContextBase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.chain.Constants;
import org.apache.struts.config.ActionConfig;
import org.apache.struts.config.FormBeanConfig;
import org.apache.struts.config.ForwardConfig;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.util.MessageResources;
import org.apache.struts.util.TokenProcessor;

import java.util.Locale;
import java.util.Map;

/**
 * <p> Provide an abstract but semi-complete implementation of ActionContext
 * to serve as the base for concrete implementations. </p> <p> The abstract
 * methods to implement are the accessors for the named states,
 * <code>getApplicationScope</code>, <code>getRequestScope</code>, and
 * <code>getSessionScope</code>. </p>
 */
public abstract class ActionContextBase extends ContextWrapper
    implements ActionContext {
    /**
     * @see Constants.ACTION_KEY
     */
    public static final String ACTION_KEY = Constants.ACTION_KEY;

    /**
     * @see
     */
    public static final String ACTION_CONFIG_KEY = Constants.ACTION_CONFIG_KEY;

    /**
     * @see Constants.ACTION_FORM_KEY
     */
    public static final String ACTION_FORM_KEY = Constants.ACTION_FORM_KEY;

    /**
     * @see Constants.FORWARD_CONFIG_KEY
     */
    public static final String FORWARD_CONFIG_KEY =
        Constants.FORWARD_CONFIG_KEY;

    /**
     * @see Constants.MODULE_CONFIG_KEY
     */
    public static final String MODULE_CONFIG_KEY = Constants.MODULE_CONFIG_KEY;

    /**
     * @see Constants.EXCEPTION_KEY
     */
    public static final String EXCEPTION_KEY = Constants.EXCEPTION_KEY;

    /**
     * <p> Provide the default context attribute under which to store the
     * ActionMessage cache for errors. </p>
     */
    public static final String ERROR_ACTION_MESSAGES_KEY = "errors";

    /**
     * <p> Provide the default context attribute under which to store the
     * ActionMessage cache. </p>
     */
    public static final String MESSAGE_ACTION_MESSAGES_KEY = "messages";

    /**
     * @see Constants.MESSAGE_RESOURCES_KEY
     */
    public static final String MESSAGE_RESOURCES_KEY =
        Constants.MESSAGE_RESOURCES_KEY;

    /**
     * @see Constants.INCLUDE_KEY
     */
    public static final String INCLUDE_KEY = Constants.INCLUDE_KEY;

    /**
     * @see Constants.LOCALE_KEY
     */
    public static final String LOCALE_KEY = Constants.LOCALE_KEY;

    /**
     * @see Constants.CANCEL_KEY
     */
    public static final String CANCEL_KEY = Constants.CANCEL_KEY;

    /**
     * @see Constants.VALID_KEY
     */
    public static final String VALID_KEY = Constants.VALID_KEY;

    /**
     * Provide the default context attribute under which to store the
     * transaction token key.
     */
    public static final String TRANSACTION_TOKEN_KEY = "TRANSACTION_TOKEN_KEY";

    /**
     * Provide the default context attribute under which to store the token
     * key.
     */
    public static final String TOKEN_KEY = "TOKEN_KEY";

    /**
     * Store the TokenProcessor instance for this Context.
     */
    protected TokenProcessor token = null;

    /**
     * Store the Log instance for this Context.
     */
    private Log logger = null;

    /**
     * Instantiate ActionContextBase, wrapping the given Context.
     *
     * @param context Context to wrap
     */
    public ActionContextBase(Context context) {
        super(context);
        token = TokenProcessor.getInstance();
        logger = LogFactory.getLog(this.getClass());
    }

    /**
     * Instantiate ActionContextBase, wrapping a default ContextBase
     * instance.
     */
    public ActionContextBase() {
        this(new ContextBase());
    }

    // -------------------------------
    // General Application Support
    // -------------------------------
    public void release() {
        this.token = null;
    }

    public abstract Map getApplicationScope();

    public abstract Map getRequestScope();

    public abstract Map getSessionScope();

    public Map getScope(String scopeName) {
        if (REQUEST_SCOPE.equals(scopeName)) {
            return this.getRequestScope();
        }

        if (SESSION_SCOPE.equals(scopeName)) {
            return this.getSessionScope();
        }

        if (APPLICATION_SCOPE.equals(scopeName)) {
            return this.getApplicationScope();
        }

        throw new IllegalArgumentException("Invalid scope: " + scopeName);
    }

    // -------------------------------
    // General Struts properties
    // -------------------------------
    public void setAction(Action action) {
        this.put(ACTION_KEY, action);
    }

    public Action getAction() {
        return (Action) this.get(ACTION_KEY);
    }

    public void setActionForm(ActionForm form) {
        this.put(ACTION_FORM_KEY, form);
    }

    public ActionForm getActionForm() {
        return (ActionForm) this.get(ACTION_FORM_KEY);
    }

    public void setActionConfig(ActionConfig config) {
        this.put(ACTION_CONFIG_KEY, config);
    }

    public ActionConfig getActionConfig() {
        return (ActionConfig) this.get(ACTION_CONFIG_KEY);
    }

    public void setForwardConfig(ForwardConfig forward) {
        this.put(FORWARD_CONFIG_KEY, forward);
    }

    public ForwardConfig getForwardConfig() {
        return (ForwardConfig) this.get(FORWARD_CONFIG_KEY);
    }

    public void setInclude(String include) {
        this.put(INCLUDE_KEY, include);
    }

    public String getInclude() {
        return (String) this.get(INCLUDE_KEY);
    }

    public Boolean getFormValid() {
        return (Boolean) this.get(VALID_KEY);
    }

    public void setFormValid(Boolean valid) {
        this.put(VALID_KEY, valid);
    }

    public ModuleConfig getModuleConfig() {
        return (ModuleConfig) this.get(MODULE_CONFIG_KEY);
    }

    public void setModuleConfig(ModuleConfig config) {
        this.put(MODULE_CONFIG_KEY, config);
    }

    public Exception getException() {
        return (Exception) this.get(EXCEPTION_KEY);
    }

    public void setException(Exception e) {
        this.put(EXCEPTION_KEY, e);
    }

    // -------------------------------
    // ActionMessage Processing
    // -------------------------------
    public void addMessages(ActionMessages messages) {
        this.addActionMessages(MESSAGE_ACTION_MESSAGES_KEY, messages);
    }

    public void addErrors(ActionMessages errors) {
        this.addActionMessages(ERROR_ACTION_MESSAGES_KEY, errors);
    }

    public ActionMessages getErrors() {
        return (ActionMessages) this.get(ERROR_ACTION_MESSAGES_KEY);
    }

    public ActionMessages getMessages() {
        return (ActionMessages) this.get(MESSAGE_ACTION_MESSAGES_KEY);
    }

    public void saveErrors(ActionMessages errors) {
        this.saveActionMessages(ERROR_ACTION_MESSAGES_KEY, errors);
    }