content: /*
   * 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.chemistry.opencmis.commons.impl.json;
  
  import java.io.IOException;
  import java.io.Writer;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * A JSON array. JSONObject supports java.util.List interface.
   * 
   * (Taken from JSON.simple &lt;http://code.google.com/p/json-simple/&gt; and
   * modified for OpenCMIS.)
   * 
   * @author FangYidong&lt;fangyidong@yahoo.com.cn&gt;
   */
  public class JSONArray extends ArrayList<Object> implements List<Object>, JSONAware, JSONStreamAware {
      private static final long serialVersionUID = 3957988303675231981L;
  
      /**
       * Encode a list into JSON text and write it to out. If this list is also a
       * JSONStreamAware or a JSONAware, JSONStreamAware and JSONAware specific
       * behaviours will be ignored at this top level.
       * 
       * @see org.apache.chemistry.opencmis.commons.impl.json.JSONValue#writeJSONString(Object,
       *      Writer)
       * 
       * @param list
       * @param out
       */
      public static void writeJSONString(List<Object> list, Writer out) throws IOException {
          if (list == null) {
              out.write("null");
              return;
          }
  
          boolean first = true;
  
          out.write('[');
          for (Object value : list) {
              if (first) {
                  first = false;
              } else {
                  out.write(',');
              }
  
              if (value == null) {
                  out.write("null");
                  continue;
              }
  
              JSONValue.writeJSONString(value, out);
          }
          out.write(']');
      }
  
      @Override
      public void writeJSONString(Writer out) throws IOException {
          writeJSONString(this, out);
      }
  
      /**
       * Convert a list to JSON text. The result is a JSON array. If this list is
       * also a JSONAware, JSONAware specific behaviours will be omitted at this
       * top level.
       * 
       * @see org.apache.chemistry.opencmis.commons.impl.json.JSONValue#toJSONString(Object)
       * 
       * @param list
       * @return JSON text, or "null" if list is null.
       */
      public static String toJSONString(List<Object> list) {
          if (list == null) {
              return "null";
          }
  
          StringBuilder sb = new StringBuilder(1024);
          addJSONString(list, sb);
          return sb.toString();
      }
  
      public static void addJSONString(List<Object> list, StringBuilder sb) {
          if (list == null) {
              sb.append("null");
              return;
          }
  
          boolean first = true;
  
          sb.append('[');
          for (Object value : list) {
              if (first) {
                  first = false;
              } else {
                  sb.append(',');
              }
  
              if (value == null) {
                  sb.append("null");
                  continue;
              }
              sb.append(JSONValue.toJSONString(value));
          }
          sb.append(']');
      }
  
      @Override
      public String toJSONString() {
          return toJSONString(this);
      }
  
      @Override
      public String toString() {
          return toJSONString();
      }
  }
  