/*
* 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.Array;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import com.alibaba.fastjson.JSONArray;
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 ObjectArrayCodec implements ObjectSerializer, ObjectDeserializer {
public static final ObjectArrayCodec instance = new ObjectArrayCodec();
public ObjectArrayCodec(){
}
public final void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features)
throws IOException {
SerializeWriter out = serializer.out;
Object[] array = (Object[]) object;
if (object == null) {
out.writeNull(SerializerFeature.WriteNullListAsEmpty);
return;
}
int size = array.length;
int end = size - 1;
if (end == -1) {
out.append("[]");
return;
}
SerialContext context = serializer.context;
serializer.setContext(context, object, fieldName, 0);
try {
Class<?> preClazz = null;
ObjectSerializer preWriter = null;
out.append('[');
if (out.isEnabled(SerializerFeature.PrettyFormat)) {
serializer.incrementIndent();
serializer.println();
for (int i = 0; i < size; ++i) {
if (i != 0) {
out.write(',');
serializer.println();
}
serializer.write(array[i]);
}
serializer.decrementIdent();
serializer.println();
out.write(']');
return;
}
for (int i = 0; i < end; ++i) {
Object item = array[i];
if (item == null) {
out.append("null,");
} else {
if (serializer.containsReference(item)) {
serializer.writeReference(item);
} else {
Class<?> clazz = item.getClass();
if (clazz == preClazz) {
preWriter.write(serializer, item, null, null, 0);
} else {
preClazz = clazz;
preWriter = serializer.getObjectWriter(clazz);
preWriter.write(serializer, item, null, null, 0);
}
}
out.append(',');
}
}
Object item = array[end];
if (item == null) {
out.append("null]");
} else {
if (serializer.containsReference(item)) {
serializer.writeReference(item);
} else {
serializer.writeWithFieldName(item, end);
}
out.append(']');
}
} finally {
serializer.context = context;
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
final JSONLexer lexer = parser.lexer;
if (lexer.token() == JSONToken.NULL) {
lexer.nextToken(JSONToken.COMMA);
return null;
}
if (lexer.token() == JSONToken.LITERAL_STRING) {
byte[] bytes = lexer.bytesValue();
lexer.nextToken(JSONToken.COMMA);
if (bytes.length == 0 && type != byte[].class) {
return null;
}
return (T) bytes;
}
Class componentClass;
Type componentType;
if (type instanceof GenericArrayType) {
GenericArrayType clazz = (GenericArrayType) type;
componentType = clazz.getGenericComponentType();
if (componentType instanceof TypeVariable) {
TypeVariable typeVar = (TypeVariable) componentType;
Type objType = parser.getContext().type;
if (objType instanceof ParameterizedType) {
ParameterizedType objParamType = (ParameterizedType) objType;
Type objRawType = objParamType.getRawType();
Type actualType = null;
if (objRawType instanceof Class) {
TypeVariable[] objTypeParams = ((Class) objRawType).getTypeParameters();
for (int i = 0; i < objTypeParams.length; ++i) {
if (objTypeParams[i].getName().equals(typeVar.getName())) {
actualType = objParamType.getActualTypeArguments()[i];
}
}
}
if (actualType instanceof Class) {
componentClass = (Class) actualType;
} else {
componentClass = Object.class;
}
} else {
componentClass = TypeUtils.getClass(typeVar.getBounds()[0]);
}
} else {
componentClass = TypeUtils.getClass(componentType);
}
} else {
Class clazz = (Class) type;
componentType = componentClass = clazz.getComponentType();
}
JSONArray array = new JSONArray();
parser.parseArray(componentType, array, fieldName);
return (T) toObjectArray(parser, componentClass, array);
}
@SuppressWarnings("unchecked")
private <T> T toObjectArray(DefaultJSONParser parser, Class<?> componentType, JSONArray array) {
if (array == null) {
return null;
}
int size = array.size();
Object objArray = Array.newInstance(componentType, size);
for (int i = 0; i < size; ++i) {
Object value = array.get(i);
if (value == array) {
Array.set(objArray, i, objArray);
continue;
}
if (componentType.isArray()) {
Object element;
if (componentType.isInstance(value)) {
element = value;
} else {
element = toObjectArray(parser, componentType, (JSONArray) value);
}
Array.set(objArray, i, element);
} else {
Object element = null;
if (value instanceof JSONArray) {
boolean contains = false;
JSONArray valueArray = (JSONArray) value;
int valueArraySize = valueArray.size();
for (int y = 0; y < valueArraySize; ++y) {
Object valueItem = valueArray.get(y);
if (valueItem == array) {
valueArray.set(i, objArray);
contains = true;
}
}
if (contains) {
element = valueArray.toArray();
}
}
if (element == null) {
element = TypeUtils.cast(value, componentType, parser.getConfig());
}
Array.set(objArray, i, element);
}
}
array.setRelatedArray(objArray);
array.setComponentType(componentType);
return (T) objArray; // TODO
}
public int getFastMatchToken() {
return JSONToken.LBRACKET;
}
}