/*
    * ====================================================================
    * 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.config;
  
  import org.apache.http.util.Args;
  
  /**
   * HTTP Message constraints: line length and header count.
   * <p>
   * Please note that line length is defined in bytes and not characters.
   * This is only relevant however when using non-standard HTTP charsets
   * for protocol elements such as UTF-8.
   * </p>
   *
   * @since 4.3
   */
  public class MessageConstraints implements Cloneable {
  
      public static final MessageConstraints DEFAULT = new Builder().build();
  
      private final int maxLineLength;
      private final int maxHeaderCount;
  
      MessageConstraints(final int maxLineLength, final int maxHeaderCount) {
          super();
          this.maxLineLength = maxLineLength;
          this.maxHeaderCount = maxHeaderCount;
      }
  
      public int getMaxLineLength() {
          return maxLineLength;
      }
  
      public int getMaxHeaderCount() {
          return maxHeaderCount;
      }
  
      @Override
      protected MessageConstraints clone() throws CloneNotSupportedException {
          return (MessageConstraints) super.clone();
      }
  
      @Override
      public String toString() {
          final StringBuilder builder = new StringBuilder();
          builder.append("[maxLineLength=").append(maxLineLength)
                  .append(", maxHeaderCount=").append(maxHeaderCount)
                  .append("]");
          return builder.toString();
      }
  
      public static MessageConstraints lineLen(final int max) {
          return new MessageConstraints(Args.notNegative(max, "Max line length"), -1);
      }
  
      public static MessageConstraints.Builder custom() {
          return new Builder();
      }
  
      public static MessageConstraints.Builder copy(final MessageConstraints config) {
          Args.notNull(config, "Message constraints");
          return new Builder()
              .setMaxHeaderCount(config.getMaxHeaderCount())
              .setMaxLineLength(config.getMaxLineLength());
      }
  
      public static class Builder {
  
          private int maxLineLength;
          private int maxHeaderCount;
  
          Builder() {
              this.maxLineLength = -1;
              this.maxHeaderCount = -1;
         }
 
         public Builder setMaxLineLength(final int maxLineLength) {
             this.maxLineLength = maxLineLength;
             return this;
         }
 
         public Builder setMaxHeaderCount(final int maxHeaderCount) {
             this.maxHeaderCount = maxHeaderCount;
             return this;
         }
 
         public MessageConstraints build() {
             return new MessageConstraints(maxLineLength, maxHeaderCount);
         }
 
     }
 
 }