/**
    * Licensed to jclouds, Inc. (jclouds) under one or more
    * contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  jclouds 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.jclouds.domain;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import org.jclouds.util.Patterns;
  
  /**
   * 
   * As String is final, using a different marker to imply this is a json object
   * 
   * @author Adrian Cole
   * @see <a href="http://code.google.com/p/google-gson/issues/detail?id=326"/>
   */
  public class JsonBall implements java.io.Serializable, Comparable<String>, CharSequence {
  
     private static final long serialVersionUID = -8168997021767065199L;
     private final String value;
  
     @Override
     public boolean equals(Object obj) {
        if (this == obj)
           return true;
        if (obj == null)
           return false;
        if (getClass() != obj.getClass())
           return false;
        JsonBall other = (JsonBall) obj;
        if (value == null) {
           if (other.value != null)
              return false;
        } else if (!value.equals(other.value))
           return false;
        return true;
     }
  
     @Override
     public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((value == null) ? 0 : value.hashCode());
        return result;
     }
  
     @Override
     public String toString() {
        return value;
     }
  
     public JsonBall(double value) {
        this.value = value + "";
     }
  
     public JsonBall(int value) {
        this.value = value + "";
     }
  
     public JsonBall(long value) {
        this.value = value + "";
     }
  
     public JsonBall(String value) {
        this.value = quoteStringIfNotNumber(checkNotNull(value, "value"));
     }
  
     static String quoteStringIfNotNumber(String in) {
        if (Patterns.JSON_STRING_PATTERN.matcher(in).find() && !Patterns.JSON_NUMBER_PATTERN.matcher(in).find()) {
           return "\"" + in + "\"";
        }
        return in;
     }
  
     @Override
     public char charAt(int index) {
        return value.charAt(index);
     }
  
     @Override
     public int length() {
        return value.length();
     }
  
    @Override
    public CharSequence subSequence(int start, int end) {
       return value.subSequence(start, end);
    }
 
    @Override
    public int compareTo(String o) {
       return value.compareTo(o);
    }
 
 }