package com.alibaba.fastjson.parser.deserializer;
import java.lang.reflect.Array;
import java.lang.reflect.Type;
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.util.TypeUtils;
public class ArrayDeserializer implements ObjectDeserializer {
public final static ArrayDeserializer instance = new ArrayDeserializer();
@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
final JSONLexer lexer = parser.getLexer();
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);
return (T) bytes;
}
Class clazz = (Class) type;
Class componentType = clazz.getComponentType();
JSONArray array = new JSONArray();
parser.parseArray(componentType, array, fieldName);
return (T) toObjectArray(parser, clazz, array);
}
@SuppressWarnings("unchecked")
private <T> T toObjectArray(DefaultJSONParser parser, Class<T> clazz, JSONArray array) {
if (array == null) {
return null;
}
int size = array.size();
Class<?> componentType = clazz.getComponentType();
Object objArray = Array.newInstance(componentType, size);
for (int i = 0; i < size; ++i) {
Object value = array.get(i);
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 = 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;
}
}