/*
* Copyright 1999-2017 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;
/**
* @author wenshao[szujobs@hotmail.com]
*/
public class DoubleSerializer implements ObjectSerializer {
public final static DoubleSerializer instance = new DoubleSerializer();
private DecimalFormat decimalFormat = null;
public DoubleSerializer(){
}
public DoubleSerializer(DecimalFormat decimalFormat){
this.decimalFormat = decimalFormat;
}
public DoubleSerializer(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;
}
double doubleValue = ((Double) object).doubleValue();
if (Double.isNaN(doubleValue) //
|| Double.isInfinite(doubleValue)) {
out.writeNull();
} else {
if (decimalFormat == null) {
out.writeDouble(doubleValue, true);
} else {
String doubleText = decimalFormat.format(doubleValue);
out.write(doubleText);
}
}
}
}