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/*
 * Copyright 2002-2009 the original author or authors.
 * 
 * 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.googlecode.gwt.test.web;

import static org.fest.assertions.api.Assertions.assertThat;

import java.util.Collections;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.Map;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;

/**
 * Mock implementation of the {@link javax.servlet.ServletConfig} interface. Adapted from
 * spring-test
 * 
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @author Gael Lazzari
 */
public class MockServletConfig implements ServletConfig {

   private final Map initParameters = new LinkedHashMap();

   private final ServletContext servletContext;

   private final String servletName;

   /**
    * Create a new MockServletConfig with a default {@link MockServletContext}.
    */
   public MockServletConfig() {
      this(null, "");
   }

   /**
    * Create a new MockServletConfig.
    * 
    * @param servletContext the ServletContext that the servlet runs in
    */
   public MockServletConfig(ServletContext servletContext) {
      this(servletContext, "");
   }

   /**
    * Create a new MockServletConfig.
    * 
    * @param servletContext the ServletContext that the servlet runs in
    * @param servletName the name of the servlet
    */
   public MockServletConfig(ServletContext servletContext, String servletName) {
      this.servletContext = (servletContext != null ? servletContext : new MockServletContext());
      this.servletName = servletName;
   }

   /**
    * Create a new MockServletConfig with a default {@link MockServletContext}.
    * 
    * @param servletName the name of the servlet
    */
   public MockServletConfig(String servletName) {
      this(null, servletName);
   }

   public void addInitParameter(String name, String value) {
      assertThat(name).as("Parameter name must not be null").isNotNull();
      this.initParameters.put(name, value);
   }

   public String getInitParameter(String name) {
      assertThat(name).as("Parameter name must not be null").isNotNull();
      return this.initParameters.get(name);
   }

   public Enumeration getInitParameterNames() {
      return Collections.enumeration(this.initParameters.keySet());
   }

   public ServletContext getServletContext() {
      return this.servletContext;
   }

   public String getServletName() {
      return this.servletName;
   }

}