/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * 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.http.message;
  
  import org.apache.http.Header;
  import org.apache.http.HeaderIterator;
  import org.apache.http.HttpMessage;
  import org.apache.http.annotation.NotThreadSafe;
  import org.apache.http.params.HttpParams;
  import org.apache.http.params.BasicHttpParams;
  
  /**
   * Basic implementation of {@link HttpMessage}.
   *
   * @since 4.0
   */
  @NotThreadSafe
  public abstract class AbstractHttpMessage implements HttpMessage {
  
      protected HeaderGroup headergroup;
  
      protected HttpParams params;
  
      protected AbstractHttpMessage(final HttpParams params) {
          super();
          this.headergroup = new HeaderGroup();
          this.params = params;
      }
  
      protected AbstractHttpMessage() {
          this(null);
      }
  
      // non-javadoc, see interface HttpMessage
      public boolean containsHeader(String name) {
          return this.headergroup.containsHeader(name);
      }
  
      // non-javadoc, see interface HttpMessage
      public Header[] getHeaders(final String name) {
          return this.headergroup.getHeaders(name);
      }
  
      // non-javadoc, see interface HttpMessage
      public Header getFirstHeader(final String name) {
          return this.headergroup.getFirstHeader(name);
      }
  
      // non-javadoc, see interface HttpMessage
      public Header getLastHeader(final String name) {
          return this.headergroup.getLastHeader(name);
      }
  
      // non-javadoc, see interface HttpMessage
      public Header[] getAllHeaders() {
          return this.headergroup.getAllHeaders();
      }
  
      // non-javadoc, see interface HttpMessage
      public void addHeader(final Header header) {
          this.headergroup.addHeader(header);
      }
  
      // non-javadoc, see interface HttpMessage
      public void addHeader(final String name, final String value) {
          if (name == null) {
              throw new IllegalArgumentException("Header name may not be null");
          }
          this.headergroup.addHeader(new BasicHeader(name, value));
      }
  
      // non-javadoc, see interface HttpMessage
      public void setHeader(final Header header) {
          this.headergroup.updateHeader(header);
     }
 
     // non-javadoc, see interface HttpMessage
     public void setHeader(final String name, final String value) {
         if (name == null) {
             throw new IllegalArgumentException("Header name may not be null");
         }
         this.headergroup.updateHeader(new BasicHeader(name, value));
     }
 
     // non-javadoc, see interface HttpMessage
     public void setHeaders(final Header[] headers) {
         this.headergroup.setHeaders(headers);
     }
 
     // non-javadoc, see interface HttpMessage
     public void removeHeader(final Header header) {
         this.headergroup.removeHeader(header);
     }
 
     // non-javadoc, see interface HttpMessage
     public void removeHeaders(final String name) {
         if (name == null) {
             return;
         }
         for (HeaderIterator i = this.headergroup.iterator(); i.hasNext(); ) {
             Header header = i.nextHeader();
             if (name.equalsIgnoreCase(header.getName())) {
                 i.remove();
             }
         }
     }
 
     // non-javadoc, see interface HttpMessage
     public HeaderIterator headerIterator() {
         return this.headergroup.iterator();
     }
 
     // non-javadoc, see interface HttpMessage
     public HeaderIterator headerIterator(String name) {
         return this.headergroup.iterator(name);
     }
 
     // non-javadoc, see interface HttpMessage
     public HttpParams getParams() {
         if (this.params == null) {
             this.params = new BasicHttpParams();
         }
         return this.params;
     }
 
     // non-javadoc, see interface HttpMessage
     public void setParams(final HttpParams params) {
         if (params == null) {
             throw new IllegalArgumentException("HTTP parameters may not be null");
         }
         this.params = params;
     }
 }