/*
* Copyright 1999-2101 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.util.Collection;
import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.util.FieldInfo;
/**
* @author wenshao<szujobs@hotmail.com>
*/
public class ObjectFieldSerializer extends FieldSerializer {
private ObjectSerializer fieldSerializer;
private Class<?> runtimeFieldClass;
private String format;
private boolean writeNumberAsZero = false;
boolean writeNullStringAsEmpty = false;
boolean writeNullBooleanAsFalse = false;
boolean writeNullListAsEmpty = false;
boolean writeEnumUsingToString = false;
public ObjectFieldSerializer(FieldInfo fieldInfo){
super(fieldInfo);
JSONField annotation = fieldInfo.getAnnotation(JSONField.class);
if (annotation != null) {
format = annotation.format();
if (format.trim().length() == 0) {
format = null;
}
for (SerializerFeature feature : annotation.serialzeFeatures()) {
if (feature == SerializerFeature.WriteNullNumberAsZero) {
writeNumberAsZero = true;
} else if (feature == SerializerFeature.WriteNullStringAsEmpty) {
writeNullStringAsEmpty = true;
} else if (feature == SerializerFeature.WriteNullBooleanAsFalse) {
writeNullBooleanAsFalse = true;
} else if (feature == SerializerFeature.WriteNullListAsEmpty) {
writeNullListAsEmpty = true;
} else if (feature == SerializerFeature.WriteEnumUsingToString) {
writeEnumUsingToString = true;
}
}
}
}
public void writeProperty(JSONSerializer serializer, Object propertyValue) throws Exception {
writePrefix(serializer);
writeValue(serializer, propertyValue);
}
@Override
public void writeValue(JSONSerializer serializer, Object propertyValue) throws Exception {
if (format != null) {
serializer.writeWithFormat(propertyValue, format);
return;
}
if (fieldSerializer == null) {
if (propertyValue == null) {
runtimeFieldClass = this.fieldInfo.getFieldClass();
} else {
runtimeFieldClass = propertyValue.getClass();
}
fieldSerializer = serializer.getObjectWriter(runtimeFieldClass);
}
if (propertyValue == null) {
if (writeNumberAsZero && Number.class.isAssignableFrom(runtimeFieldClass)) {
serializer.getWriter().write('0');
return;
} else if (writeNullStringAsEmpty && String.class == runtimeFieldClass) {
serializer.getWriter().write("\"\"");
return;
} else if (writeNullBooleanAsFalse && Boolean.class == runtimeFieldClass) {
serializer.getWriter().write("false");
return;
} else if (writeNullListAsEmpty && Collection.class.isAssignableFrom(runtimeFieldClass)) {
serializer.getWriter().write("[]");
return;
}
fieldSerializer.write(serializer, null, fieldInfo.getName(), null);
return;
}
if (writeEnumUsingToString == true && runtimeFieldClass.isEnum()) {
serializer.getWriter().writeString(((Enum<?>) propertyValue).name());
return;
}
Class<?> valueClass = propertyValue.getClass();
if (valueClass == runtimeFieldClass) {
fieldSerializer.write(serializer, propertyValue, fieldInfo.getName(), fieldInfo.getFieldType());
return;
}
ObjectSerializer valueSerializer = serializer.getObjectWriter(valueClass);
valueSerializer.write(serializer, propertyValue, fieldInfo.getName(), fieldInfo.getFieldType());
}
}