/src/main/java/com/alibaba/fastjson/serializer/CollectionSerializer.java
Java | 104 lines | 68 code | 18 blank | 18 comment | 22 complexity | ff5eff556a49f8a25c029da01f0017e0 MD5 | raw file
- /*
- * 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.Collection;
- import java.util.HashSet;
- import java.util.TreeSet;
- /**
- * @author wenshao<szujobs@hotmail.com>
- */
- public class CollectionSerializer implements ObjectSerializer {
- public final static CollectionSerializer instance = new CollectionSerializer();
- public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType) throws IOException {
- SerializeWriter out = serializer.getWriter();
- if (object == null) {
- if (out.isEnabled(SerializerFeature.WriteNullListAsEmpty)) {
- out.write("[]");
- } else {
- out.writeNull();
- }
- return;
- }
- Type elementType = null;
- if (serializer.isEnabled(SerializerFeature.WriteClassName)) {
- if (fieldType instanceof ParameterizedType) {
- ParameterizedType param = (ParameterizedType) fieldType;
- elementType = param.getActualTypeArguments()[0];
- }
- }
- Collection<?> collection = (Collection<?>) object;
- SerialContext context = serializer.getContext();
- serializer.setContext(context, object, fieldName);
- if (serializer.isEnabled(SerializerFeature.WriteClassName)) {
- if (HashSet.class == collection.getClass()) {
- out.append("Set");
- } else if (TreeSet.class == collection.getClass()) {
- out.append("TreeSet");
- }
- }
- try {
- int i = 0;
- out.append('[');
- for (Object item : collection) {
- if (i++ != 0) {
- out.append(',');
- }
- if (item == null) {
- out.writeNull();
- continue;
- }
- Class<?> clazz = item.getClass();
- if (clazz == Integer.class) {
- out.writeInt(((Integer) item).intValue());
- continue;
- }
- if (clazz == Long.class) {
- out.writeLong(((Long) item).longValue());
- if (out.isEnabled(SerializerFeature.WriteClassName)) {
- out.write('L');
- }
- continue;
- }
- ObjectSerializer itemSerializer = serializer.getObjectWriter(clazz);
- itemSerializer.write(serializer, item, i - 1, elementType);
- }
- out.append(']');
- } finally {
- serializer.setContext(context);
- }
- }
- }