/*
* 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.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
/**
* @author wenshao<szujobs@hotmail.com>
*/
public final class ListSerializer implements ObjectSerializer {
public static final ListSerializer instance = new ListSerializer();
public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType)
throws IOException {
boolean writeClassName = serializer.isEnabled(SerializerFeature.WriteClassName);
SerializeWriter out = serializer.getWriter();
Type elementType = null;
if (writeClassName) {
if (fieldType instanceof ParameterizedType) {
ParameterizedType param = (ParameterizedType) fieldType;
elementType = param.getActualTypeArguments()[0];
}
}
if (object == null) {
if (out.isEnabled(SerializerFeature.WriteNullListAsEmpty)) {
out.write("[]");
} else {
out.writeNull();
}
return;
}
List<?> list = (List<?>) object;
final int size = list.size();
int end = size - 1;
if (end == -1) {
out.append("[]");
return;
}
SerialContext context = serializer.getContext();
serializer.setContext(context, object, fieldName);
ObjectSerializer itemSerializer = null;
try {
if (size > 1 && out.isEnabled(SerializerFeature.PrettyFormat)) {
out.append('[');
serializer.incrementIndent();
for (int i = 0; i < size; ++i) {
if (i != 0) {
out.append(',');
}
serializer.println();
Object item = list.get(i);
if (item != null) {
if (serializer.containsReference(item)) {
serializer.writeReference(item);
} else {
itemSerializer = serializer.getObjectWriter(item.getClass());
SerialContext itemContext = new SerialContext(context, object, fieldName);
serializer.setContext(itemContext);
itemSerializer.write(serializer, item, i, elementType);
}
} else {
serializer.getWriter().writeNull();
}
}
serializer.decrementIdent();
serializer.println();
out.append(']');
return;
}
out.append('[');
for (int i = 0; i < end; ++i) {
Object item = list.get(i);
if (item == null) {
out.append("null,");
} else {
Class<?> clazz = item.getClass();
if (clazz == Integer.class) {
out.writeIntAndChar(((Integer) item).intValue(), ',');
} else if (clazz == Long.class) {
long val = ((Long) item).longValue();
if (writeClassName) {
out.writeLongAndChar(val, 'L');
out.write(',');
} else {
out.writeLongAndChar(val, ',');
}
} else {
SerialContext itemContext = new SerialContext(context, object, fieldName);
serializer.setContext(itemContext);
if (serializer.containsReference(item)) {
serializer.writeReference(item);
} else {
itemSerializer = serializer.getObjectWriter(item.getClass());
itemSerializer.write(serializer, item, i, elementType);
}
out.append(',');
}
}
}
Object item = list.get(end);
if (item == null) {
out.append("null]");
} else {
Class<?> clazz = item.getClass();
if (clazz == Integer.class) {
out.writeIntAndChar(((Integer) item).intValue(), ']');
} else if (clazz == Long.class) {
if (writeClassName) {
out.writeLongAndChar(((Long) item).longValue(), 'L');
out.write(']');
} else {
out.writeLongAndChar(((Long) item).longValue(), ']');
}
} else {
SerialContext itemContext = new SerialContext(context, object, fieldName);
serializer.setContext(itemContext);
if (serializer.containsReference(item)) {
serializer.writeReference(item);
} else {
itemSerializer = serializer.getObjectWriter(item.getClass());
itemSerializer.write(serializer, item, end, elementType);
}
out.append(']');
}
}
} finally {
serializer.setContext(context);
}
}
}