content: /*
   * Copyright 1999-2018 Alibaba Group.
   *
   * Licensed 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 com.alibaba.fastjson.serializer;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  
  import com.alibaba.fastjson.parser.DefaultJSONParser;
  import com.alibaba.fastjson.parser.JSONLexer;
  import com.alibaba.fastjson.parser.JSONToken;
  import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public class StringCodec implements ObjectSerializer, ObjectDeserializer {
  
      public static StringCodec instance = new StringCodec();
  
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)
                                                                                                                 throws IOException {
          write(serializer, (String) object);
      }
  
      public void write(JSONSerializer serializer, String value) {
          SerializeWriter out = serializer.out;
  
          if (value == null) {
              out.writeNull(SerializerFeature.WriteNullStringAsEmpty);
              return;
          }
  
          out.writeString(value);
      }
  
      @SuppressWarnings("unchecked")
      public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
          if (clazz == StringBuffer.class) {
              final JSONLexer lexer = parser.lexer;
              if (lexer.token() == JSONToken.LITERAL_STRING) {
                  String val = lexer.stringVal();
                  lexer.nextToken(JSONToken.COMMA);
  
                  return (T) new StringBuffer(val);
              }
  
              Object value = parser.parse();
  
              if (value == null) {
                  return null;
              }
  
              return (T) new StringBuffer(value.toString());
          }
  
          if (clazz == StringBuilder.class) {
              final JSONLexer lexer = parser.lexer;
              if (lexer.token() == JSONToken.LITERAL_STRING) {
                  String val = lexer.stringVal();
                  lexer.nextToken(JSONToken.COMMA);
  
                  return (T) new StringBuilder(val);
              }
  
              Object value = parser.parse();
  
              if (value == null) {
                  return null;
              }
  
              return (T) new StringBuilder(value.toString());
          }
  
          return (T) deserialze(parser);
      }
  
      @SuppressWarnings("unchecked")
      public static <T> T deserialze(DefaultJSONParser parser) {
          final JSONLexer lexer = parser.getLexer();
          if (lexer.token() == JSONToken.LITERAL_STRING) {
              String val = lexer.stringVal();
              lexer.nextToken(JSONToken.COMMA);
              return (T) val;
          }
  
          if (lexer.token() == JSONToken.LITERAL_INT) {
              String val = lexer.numberString();
              lexer.nextToken(JSONToken.COMMA);
              return (T) val;
          }
  
          Object value = parser.parse();
  
          if (value == null) {
              return null;
          }
  
          return (T) value.toString();
      }
  
      public int getFastMatchToken() {
          return JSONToken.LITERAL_STRING;
      }
  }
  