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 java.text.DecimalFormat;
  import java.text.NumberFormat;
  
  import com.alibaba.fastjson.JSONException;
  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;
  import com.alibaba.fastjson.util.TypeUtils;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public class FloatCodec implements ObjectSerializer, ObjectDeserializer {
      private NumberFormat decimalFormat;
  
      public static FloatCodec instance = new FloatCodec();
  
      public FloatCodec(){
  
      }
  
      public FloatCodec(DecimalFormat decimalFormat){
          this.decimalFormat = decimalFormat;
      }
  
      public FloatCodec(String decimalFormat){
          this(new DecimalFormat(decimalFormat));
      }
  
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
          SerializeWriter out = serializer.out;
          
          if (object == null) {
              out.writeNull(SerializerFeature.WriteNullNumberAsZero);
              return;
          }
  
          float floatValue = ((Float) object).floatValue();
          if (decimalFormat != null) {
              String floatText = decimalFormat.format(floatValue);
              out.write(floatText);
          } else {
              out.writeFloat(floatValue, true);
          }
      }
      
      @SuppressWarnings("unchecked")
      public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
          try {
              return (T) deserialze(parser);
          } catch (Exception ex) {
              throw new JSONException("parseLong error, field : " + fieldName, ex);
          }
      }
  
      @SuppressWarnings("unchecked")
      public static <T> T deserialze(DefaultJSONParser parser) {
          final JSONLexer lexer = parser.lexer;
  
          if (lexer.token() == JSONToken.LITERAL_INT) {
              String val = lexer.numberString();
              lexer.nextToken(JSONToken.COMMA);
              return (T) Float.valueOf(Float.parseFloat(val));
          }
  
          if (lexer.token() == JSONToken.LITERAL_FLOAT) {
              float val = lexer.floatValue();
              lexer.nextToken(JSONToken.COMMA);
              return (T) Float.valueOf(val);
          }
  
          Object value = parser.parse();
  
          if (value == null) {
              return null;
          }
  
          return (T) TypeUtils.castToFloat(value);
      }
  
      public int getFastMatchToken() {
          return JSONToken.LITERAL_INT;
      }
  }
  