/*
    * Copyright 2009 Red Hat, Inc.
    *
    * Red Hat 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.jboss.netty.handler.codec.http2;
  
  import java.nio.charset.Charset;
  
  /**
   * Abstract HttpData implementation
   *
   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
   * @author Andy Taylor (andy.taylor@jboss.org)
   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
   * @author <a href="http://openr66.free.fr/">Frederic Bregier</a>
   *
   */
  public abstract class AbstractHttpData implements HttpData {
  
      protected final String name;
  
      protected long definedSize = 0;
  
      protected long size = 0;
  
      protected Charset charset = HttpCodecUtil.DEFAULT_CHARSET;
  
      protected boolean completed = false;
  
      public AbstractHttpData(String name, Charset charset, long size)
      throws NullPointerException, IllegalArgumentException {
          if (name == null) {
              throw new NullPointerException("name");
          }
          name = name.trim();
          if (name.length() == 0) {
              throw new IllegalArgumentException("empty name");
          }
  
          for (int i = 0; i < name.length(); i ++) {
              char c = name.charAt(i);
              if (c > 127) {
                  throw new IllegalArgumentException(
                          "name contains non-ascii character: " + name);
              }
  
              // Check prohibited characters.
              switch (c) {
              case '=':
              case ',':
              case ';':
              case ' ':
              case '\t':
              case '\r':
              case '\n':
              case '\f':
              case 0x0b: // Vertical tab
                  throw new IllegalArgumentException(
                          "name contains one of the following prohibited characters: " +
                          "=,; \\t\\r\\n\\v\\f: " + name);
              }
          }
          this.name = name;
          if (charset != null) {
              setCharset(charset);
          }
          definedSize = size;
      }
  
      public String getName() {
          return name;
      }
  
      public boolean isCompleted() {
          return completed;
      }
  
      public Charset getCharset() {
          return charset;
      }
  
      public void setCharset(Charset charset) {
          if (charset == null) {
              throw new NullPointerException("charset");
          }
          this.charset = charset;
      }
  
     public long length() {
         return size;
     }
 }