moduleconfigimpl.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * $Header: /sfroot/cvs/esimple/src/core/org/apache/struts/config/impl/ModuleConfigImpl.java,v 1.1.1.1 2004/09/08 06:38:34 lava Exp $
 * $Revision: 1.1.1.1 $
 * $Date: 2004/09/08 06:38:34 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Struts", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache"
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 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */


package org.apache.struts.config.impl;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

import org.apache.struts.config.ActionConfig;
import org.apache.struts.config.ControllerConfig;
import org.apache.struts.config.DataSourceConfig;
import org.apache.struts.config.ExceptionConfig;
import org.apache.struts.config.FormBeanConfig;
import org.apache.struts.config.ForwardConfig;
import org.apache.struts.config.MessageResourcesConfig;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.config.PlugInConfig;

/**
 * <p>The collection of static configuration information that describes a
 * Struts-based module.  Multiple modules are identified by
 * a <em>prefix</em> at the beginning of the context
 * relative portion of the request URI.  If no module prefix can be
 * matched, the default configuration (with a prefix equal to a zero-length
 * string) is selected, which is elegantly backwards compatible with the
 * previous Struts behavior that only supported one module.</p>
 *
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.1.1.1 $ $Date: 2004/09/08 06:38:34 $
 * @since Struts 1.1
 */
public class ModuleConfigImpl implements Serializable, ModuleConfig {
    /**
     * Construct an ModuleConfigImpl object according to the specified
     * parameter values.
     *
     * @param prefix Context-relative URI prefix for this module
     */
    public ModuleConfigImpl(String prefix) {
        super();
        this.prefix = prefix;
        this.actionConfigs = new HashMap();
        this.actionMappingClass =  "org.apache.struts.action.ActionMapping";
        this.configured = false;
        this.controllerConfig = null;
        this.dataSources = new HashMap();
        this.exceptions = new HashMap();
        this.formBeans = new HashMap();
        this.forwards = new HashMap();
        this.messageResources = new HashMap();
        this.plugIns = new ArrayList();
    }

    /**
     * Only used while we are deprecating ApplicationConfig.
     * performs a shallow copy to ensure that any operations
     * performed on an ApplicationConfig object is
     * performed on the same underlying
     * ModuleConfigImpl sub objects
     * @param moduleConfig
     * @deprecated   Only used while we are deprecating ApplicationConfig to insure maximum compatability.
     */
    public ModuleConfigImpl(ModuleConfigImpl moduleConfig) {

        super();
        this.actionConfigs = moduleConfig.actionConfigs;
        this.actionMappingClass = moduleConfig.actionMappingClass;
        this.configured = moduleConfig.configured;
        this.controllerConfig = moduleConfig.controllerConfig;
        this.dataSources = moduleConfig.dataSources;
        this.exceptions = moduleConfig.exceptions;
        this.formBeans = moduleConfig.formBeans;
        this.forwards = moduleConfig.forwards;
        this.messageResources = moduleConfig.messageResources;
        this.plugIns = moduleConfig.plugIns;
        this.prefix = moduleConfig.prefix;

    }


    // --------------------------------------------------------- Public Methods

    /**
     * Has this module been completely configured yet.  Once this flag
     * has been set, any attempt to modify the configuration will return an
     * IllegalStateException.
     */
    public boolean getConfigured() {
        return (this.configured);
    }

    /**
     * The controller configuration object for this module.
     */
    public ControllerConfig getControllerConfig() {
        if (this.controllerConfig == null) {
            this.controllerConfig = new ControllerConfig();
        }
        return (this.controllerConfig);
    }

    /**
     * The controller configuration object for this module.
     * @param cc   The controller configuration object for this module.
     */
    public void setControllerConfig(ControllerConfig cc) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        this.controllerConfig = cc;
    }

    /**
     * The prefix of the context-relative portion of the request URI, used to
     * select this configuration versus others supported by the controller
     * servlet.  A configuration with a prefix of a zero-length String is the
     * default configuration for this web module.
     */
    public String getPrefix() {
        return (this.prefix);
    }

    /**
     * The prefix of the context-relative portion of the request URI, used to
     * select this configuration versus others supported by the controller
     * servlet.  A configuration with a prefix of a zero-length String is the
     * default configuration for this web module.
     */
    public void setPrefix(String prefix) {
        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        this.prefix = prefix;
    }


    /**
     * The default class name to be used when creating action mapping
     * instances.
     */
    public String getActionMappingClass() {
        return this.actionMappingClass;
    }

    /**
     * The default class name to be used when creating action mapping
     * instances.
     * @param actionMappingClass  default class name to be used when creating action mapping
     * instances.
     */
    public void setActionMappingClass(String actionMappingClass) {
        this.actionMappingClass = actionMappingClass;
    }

    /**
     * Add a new <code>ActionConfig</code> instance to the set associated
     * with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addActionConfig(ActionConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        config.setModuleConfig(this);
        actionConfigs.put(config.getPath(), config);

    }

    /**
     * Add a new <code>DataSourceConfig</code> instance to the set associated
     * with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addDataSourceConfig(DataSourceConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        dataSources.put(config.getKey(), config);

    }

    /**
     * Add a new <code>ExceptionConfig</code> instance to the set associated
     * with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addExceptionConfig(ExceptionConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        exceptions.put(config.getType(), config);

    }

    /**
     * Add a new <code>FormBeanConfig</code> instance to the set associated
     * with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addFormBeanConfig(FormBeanConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        config.setModuleConfig(this);
        formBeans.put(config.getName(), config);

    }

    /**
     * Add a new <code>ForwardConfig</code> instance to the set of global
     * forwards associated with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addForwardConfig(ForwardConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        forwards.put(config.getName(), config);

    }

    /**
     * Add a new <code>MessageResourcesConfig</code> instance to the set
     * associated with this module.
     *
     * @param config The new configuration instance to be added
     *
     * @exception java.lang.IllegalStateException if this module configuration
     *  has been frozen
     */
    public void addMessageResourcesConfig(MessageResourcesConfig config) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        messageResources.put(config.getKey(), config);

    }

    /**
     * Add a newly configured {@link org.apache.struts.config.PlugInConfig} instance to the set of
     * plug-in Actions for this module.
     *
     * @param plugInConfig The new configuration instance to be added
     */
    public void addPlugInConfig(PlugInConfig plugInConfig) {

        if (configured) {
            throw new IllegalStateException("Configuration is frozen");
        }
        plugIns.add(plugInConfig);

    }

    /**
     * Return the action configuration for the specified path, if any;
     * otherwise return <code>null</code>.
     *
     * @param path Path of the action configuration to return
     */
    public ActionConfig findActionConfig(String path) {

        return ((ActionConfig) actionConfigs.get(path));

    }

    /**
     * Return the action configurations for this module.  If there are
     * none, a zero-length array is returned.
     */
    public ActionConfig[] findActionConfigs() {

        ActionConfig results[] = new ActionConfig[actionConfigs.size()];
        return ((ActionConfig[]) actionConfigs.values().toArray(results));

    }