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   /*
    * Copyright 2013 The Netty Project
    *
    * The Netty Project 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.spdy;
  
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.jboss.netty.util.internal.StringUtil;
  
  /**
   * The default {@link SpdyHeadersFrame} implementation.
   */
  public class DefaultSpdyHeadersFrame extends DefaultSpdyStreamFrame
          implements SpdyHeadersFrame {
  
      private boolean invalid;
      private boolean truncated;
      private final SpdyHeaders headers = new DefaultSpdyHeaders();
  
      /**
       * Creates a new instance.
       *
       * @param streamId the Stream-ID of this frame
       */
      public DefaultSpdyHeadersFrame(int streamId) {
          super(streamId);
      }
  
      public boolean isInvalid() {
          return invalid;
      }
  
      public void setInvalid() {
          invalid = true;
      }
  
      public boolean isTruncated() {
          return truncated;
      }
  
      public void setTruncated() {
          truncated = true;
      }
  
      public SpdyHeaders headers() {
          return headers;
      }
  
      @Override
      public String toString() {
          StringBuilder buf = new StringBuilder();
          buf.append(getClass().getSimpleName());
          buf.append("(last: ");
          buf.append(isLast());
          buf.append(')');
          buf.append(StringUtil.NEWLINE);
          buf.append("--> Stream-ID = ");
          buf.append(getStreamId());
          buf.append(StringUtil.NEWLINE);
          buf.append("--> Headers:");
          buf.append(StringUtil.NEWLINE);
          appendHeaders(buf);
  
          // Remove the last newline.
          buf.setLength(buf.length() - StringUtil.NEWLINE.length());
          return buf.toString();
      }
  
      protected void appendHeaders(StringBuilder buf) {
          for (Map.Entry<String, String> e: headers()) {
              buf.append("    ");
              buf.append(e.getKey());
              buf.append(": ");
              buf.append(e.getValue());
              buf.append(StringUtil.NEWLINE);
          }
      }
  }