trinidad-impl/src/main/java/org/apache/myfaces/trinidadinternal/webapp/ReplaceParametersRequestWrapper.java

/*
 * 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.myfaces.trinidadinternal.webapp;

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

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

@SuppressWarnings("deprecation")
public class ReplaceParametersRequestWrapper extends HttpServletRequestWrapper
{
  public ReplaceParametersRequestWrapper(
    HttpServletRequest    request,
    Map<String, String[]> parameters)
  {
    super(request);
    _parameters = parameters;
  }

  @Override
  public void setCharacterEncoding(String encoding)
  {
    // Do nothing
  }

  @Override
  public String getParameter(String param)
  {
    String[] value = _getParameterValues(param);
    if (value == null)
      return null;

    return value[0];
  }

  @Override
  public Map<String, String[]> getParameterMap()
  {
    return Collections.unmodifiableMap(_parameters);
  }

  @Override
  public Enumeration<String> getParameterNames()
  {
    return Collections.enumeration(_parameters.keySet());
  }

  @Override
  public String[] getParameterValues(String param)
  {
    String[] value = _getParameterValues(param);
    if (value == null)
      return null;

    return value.clone();
  }

  private String[] _getParameterValues(String param)
  {
    return _parameters.get(param);
  }

  private Map<String, String[]> _parameters;
}