forwardconfig.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.config;

import java.lang.reflect.InvocationTargetException;

/**
 * <p>A JavaBean representing the configuration information of a
 * <code>&lt;forward&gt;</code> element from a Struts configuration file.</p>
 *
 * @version $Rev$ $Date: 2005-08-14 17:24:39 -0400 (Sun, 14 Aug 2005)
 *          $
 * @since Struts 1.1
 */
public class ForwardConfig extends BaseConfig {
    // ------------------------------------------------------------- Properties

    /**
     * The name of the ForwardConfig that this object should inherit
     * properties from.
     */
    protected String inherit = null;

    /**
     * Have the inheritance values for this class been applied?
     */
    protected boolean extensionProcessed = false;

    /**
     * The unique identifier of this forward, which is used to reference it in
     * <code>Action</code> classes.
     */
    protected String name = null;

    /**
     * <p>The URL to which this <code>ForwardConfig</code> entry points, which
     * must start with a slash ("/") character.  It is interpreted according
     * to the following rules:</p>
     *
     * <ul>
     *
     * <li>If <code>contextRelative</code> property is <code>true</code>, the
     * path is considered to be context-relative within the current web
     * application (even if we are in a named module).  It will be prefixed by
     * the context path to create a server-relative URL.</li>
     *
     * <li>If the <code>contextRelative</code> property is false, the path is
     * considered to be the module-relative portion of the URL. It will be
     * used as the replacement for the <code>$P</code> marker in the
     * <code>forwardPattern</code> property defined on the {@link
     * ControllerConfig} element for our current module. For the default
     * <code>forwardPattern</code> value of <code>$C$M$P</code>, the resulting
     * server-relative URL will be the concatenation of the context path, the
     * module prefix, and the <code>path</code> from this
     * <code>ForwardConfig</code>.
     *
     * </li>
     *
     * </ul>
     */
    protected String path = null;

    /**
     * <p>The prefix of the module to which this <code>ForwardConfig</code>
     * entry points, which must start with a slash ("/") character.  </p>
     * <p>Usage note: If a forward config is used in a hyperlink, and a module
     * is specified, the path must lead to another action and not directly to
     * a page. This is in keeping with rule that in a modular application all
     * links must be to an action rather than a page. </p>
     */
    protected String module = null;

    /**
     * Should a redirect be used to transfer control to the specified path?
     */
    protected boolean redirect = false;

    /**
     * <p>The name of a <code>commons-chain</code> command which should be
     * looked up and executed before Struts dispatches control to the view
     * represented by this config.</p>
     */
    protected String command = null;

    /**
     * <p>The name of a <code>commons-chain</code> catalog in which
     * <code>command</code> should be looked up.  If this value is undefined,
     * then the command will be looked up in the "default" catalog.  This
     * value has no meaning except in the context of the <code>command</code>
     * property.</p>
     */
    protected String catalog = null;

    // ----------------------------------------------------------- Constructors

    /**
     * Construct a new instance with default values.
     */
    public ForwardConfig() {
        super();
    }

    /**
     * Construct a new instance with the specified values.
     *
     * @param name     Name of this forward
     * @param path     Path to which control should be forwarded or
     *                 redirected
     * @param redirect Should we do a redirect?
     */
    public ForwardConfig(String name, String path, boolean redirect) {
        super();
        setName(name);
        setPath(path);
        setRedirect(redirect);
    }

    /**
     * <p>Construct a new instance with the specified values.</p>
     *
     * @param name     Name of this forward
     * @param path     Path to which control should be forwarded or
     *                 redirected
     * @param redirect Should we do a redirect?
     * @param module   Module prefix, if any
     */
    public ForwardConfig(String name, String path, boolean redirect,
        String module) {
        super();
        setName(name);
        setPath(path);
        setRedirect(redirect);
        setModule(module);
    }

    /**
     * <p>Construct a new instance based on the values of another
     * ForwardConfig.</p>
     *
     * @param copyMe A ForwardConfig instance to copy
     * @since Struts 1.3.6
     */
    public ForwardConfig(ForwardConfig copyMe) {
        this(copyMe.getName(), copyMe.getPath(), copyMe.getRedirect(),
            copyMe.getModule());
    }

    public String getExtends() {
        return (this.inherit);
    }

    public void setExtends(String inherit) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.inherit = inherit;
    }

    public boolean isExtensionProcessed() {
        return extensionProcessed;
    }

    public String getName() {
        return (this.name);
    }

    public void setName(String name) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.name = name;
    }

    public String getPath() {
        return (this.path);
    }

    public void setPath(String path) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.path = path;
    }

    public String getModule() {
        return (this.module);
    }

    public void setModule(String module) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.module = module;
    }

    public boolean getRedirect() {
        return (this.redirect);
    }

    public void setRedirect(boolean redirect) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.redirect = redirect;
    }

    public String getCommand() {
        return (this.command);
    }

    public void setCommand(String command) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }

        this.command = command;
    }

    public String getCatalog() {
        return (this.catalog);
    }

    public void setCatalog(String catalog) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }