package com.alibaba.fastjson.parser.deserializer;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.IdentityHashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.ParseContext;
import com.alibaba.fastjson.parser.DefaultJSONParser.ResolveTask;
import com.alibaba.fastjson.util.TypeUtils;
public class MapDeserializer implements ObjectDeserializer {
public final static MapDeserializer instance = new MapDeserializer();
@SuppressWarnings("unchecked")
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;
}
Map<Object, Object> map = createMap(type);
ParseContext context = parser.getContext();
try {
parser.setContext(context, map, fieldName);
return (T) deserialze(parser, type, fieldName, map);
} finally {
parser.setContext(context);
}
}
@SuppressWarnings({ "rawtypes", "unchecked" })
protected Object deserialze(DefaultJSONParser parser, Type type, Object fieldName, Map map) {
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
Type keyType = parameterizedType.getActualTypeArguments()[0];
Type valueType = parameterizedType.getActualTypeArguments()[1];
if (String.class == keyType) {
return parseMap(parser, (Map<String, Object>) map, valueType, fieldName);
} else {
return parseMap(parser, map, keyType, valueType, fieldName);
}
} else {
return parser.parseObject(map, fieldName);
}
}
@SuppressWarnings("rawtypes")
public static Map parseMap(DefaultJSONParser parser, Map<String, Object> map, Type valueType, Object fieldName) {
JSONLexer lexer = parser.getLexer();
if (lexer.token() != JSONToken.LBRACE) {
throw new JSONException("syntax error, expect {, actual " + lexer.token());
}
ParseContext context = parser.getContext();
try {
for (;;) {
lexer.skipWhitespace();
char ch = lexer.getCurrent();
if (parser.isEnabled(Feature.AllowArbitraryCommas)) {
while (ch == ',') {
lexer.next();
lexer.skipWhitespace();
ch = lexer.getCurrent();
}
}
String key;
if (ch == '"') {
key = lexer.scanSymbol(parser.getSymbolTable(), '"');
lexer.skipWhitespace();
ch = lexer.getCurrent();
if (ch != ':') {
throw new JSONException("expect ':' at " + lexer.pos());
}
} else if (ch == '}') {
lexer.next();
lexer.resetStringPosition();
lexer.nextToken(JSONToken.COMMA);
return map;
} else if (ch == '\'') {
if (!parser.isEnabled(Feature.AllowSingleQuotes)) {
throw new JSONException("syntax error");
}
key = lexer.scanSymbol(parser.getSymbolTable(), '\'');
lexer.skipWhitespace();
ch = lexer.getCurrent();
if (ch != ':') {
throw new JSONException("expect ':' at " + lexer.pos());
}
} else {
if (!parser.isEnabled(Feature.AllowUnQuotedFieldNames)) {
throw new JSONException("syntax error");
}
key = lexer.scanSymbolUnQuoted(parser.getSymbolTable());
lexer.skipWhitespace();
ch = lexer.getCurrent();
if (ch != ':') {
throw new JSONException("expect ':' at " + lexer.pos() + ", actual " + ch);
}
}
lexer.next();
lexer.skipWhitespace();
ch = lexer.getCurrent();
lexer.resetStringPosition();
if (key == JSON.DEFAULT_TYPE_KEY) {
String typeName = lexer.scanSymbol(parser.getSymbolTable(), '"');
Class<?> clazz = TypeUtils.loadClass(typeName);
if (clazz == map.getClass()) {
lexer.nextToken(JSONToken.COMMA);
if (lexer.token() == JSONToken.RBRACE) {
lexer.nextToken(JSONToken.COMMA);
return map;
}
continue;
}
ObjectDeserializer deserializer = parser.getConfig().getDeserializer(clazz);
lexer.nextToken(JSONToken.COMMA);
parser.setResolveStatus(DefaultJSONParser.TypeNameRedirect);
if (context != null && !(fieldName instanceof Integer)) {
parser.popContext();
}
return (Map) deserializer.deserialze(parser, clazz, fieldName);
}
Object value;
lexer.nextToken();
if (lexer.token() == JSONToken.NULL) {
value = null;
lexer.nextToken();
} else {
value = parser.parseObject(valueType);
}
map.put(key, value);
parser.checkMapResolve(map, key);
parser.setContext(context, value, key);
final int tok = lexer.token();
if (tok == JSONToken.EOF || tok == JSONToken.RBRACKET) {
return map;
}
if (tok == JSONToken.RBRACE) {
lexer.nextToken();
return map;
}
}
} finally {
parser.setContext(context);
}
}
public static Object parseMap(DefaultJSONParser parser, Map<Object, Object> map, Type keyType, Type valueType,
Object fieldName) {
JSONLexer lexer = parser.getLexer();
if (lexer.token() != JSONToken.LBRACE && lexer.token() != JSONToken.COMMA) {
throw new JSONException("syntax error, expect {, actual " + lexer.tokenName());
}
ObjectDeserializer keyDeserializer = parser.getConfig().getDeserializer(keyType);
ObjectDeserializer valueDeserializer = parser.getConfig().getDeserializer(valueType);
lexer.nextToken(keyDeserializer.getFastMatchToken());
ParseContext context = parser.getContext();
try {
for (;;) {
if (lexer.token() == JSONToken.RBRACE) {
lexer.nextToken(JSONToken.COMMA);
break;
}
if (lexer.token() == JSONToken.LITERAL_STRING && lexer.isRef()) {
Object object = null;
lexer.nextTokenWithColon(JSONToken.LITERAL_STRING);
if (lexer.token() == JSONToken.LITERAL_STRING) {
String ref = lexer.stringVal();
if ("..".equals(ref)) {
ParseContext parentContext = context.getParentContext();
object = parentContext.getObject();
} else if ("$".equals(ref)) {
ParseContext rootContext = context;
while (rootContext.getParentContext() != null) {
rootContext = rootContext.getParentContext();
}
object = rootContext.getObject();
} else {
parser.addResolveTask(new ResolveTask(context, ref));
parser.setResolveStatus(DefaultJSONParser.NeedToResolve);
}
} else {
throw new JSONException("illegal ref, " + JSONToken.name(lexer.token()));
}
lexer.nextToken(JSONToken.RBRACE);
if (lexer.token() != JSONToken.RBRACE) {
throw new JSONException("illegal ref");
}
lexer.nextToken(JSONToken.COMMA);
// parser.setContext(context, map, fieldName);
// parser.setContext(context);
return object;
}
if (map.size() == 0 //
&& lexer.token() == JSONToken.LITERAL_STRING //
&& JSON.DEFAULT_TYPE_KEY.equals(lexer.stringVal())) {
lexer.nextTokenWithColon(JSONToken.LITERAL_STRING);
lexer.nextToken(JSONToken.COMMA);
if (lexer.token() == JSONToken.RBRACE) {
lexer.nextToken();
return map;
}
lexer.nextToken(keyDeserializer.getFastMatchToken());
}
Object key = keyDeserializer.deserialze(parser, keyType, null);
if (lexer.token() != JSONToken.COLON) {
throw new JSONException("syntax error, expect :, actual " + lexer.token());
}
lexer.nextToken(valueDeserializer.getFastMatchToken());
Object value = valueDeserializer.deserialze(parser, valueType, key);
map.put(key, value);
if (lexer.token() == JSONToken.COMMA) {
lexer.nextToken(keyDeserializer.getFastMatchToken());
}
}
} finally {
parser.setContext(context);
}
return map;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
protected Map<Object, Object> createMap(Type type) {
if (type == Properties.class) {
return new Properties();
}
if (type == Hashtable.class) {
return new Hashtable();
}
if (type == IdentityHashMap.class) {
return new IdentityHashMap();
}
if (type == SortedMap.class || type == TreeMap.class) {
return new TreeMap();
}
if (type == ConcurrentMap.class || type == ConcurrentHashMap.class) {
return new ConcurrentHashMap();
}
if (type == Map.class || type == HashMap.class) {
return new HashMap();
}
if (type == LinkedHashMap.class) {
return new LinkedHashMap();
}
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType) type;
return createMap(parameterizedType.getRawType());
}
Class<?> clazz = (Class<?>) type;
if (clazz.isInterface()) {
throw new JSONException("unsupport type " + type);
}
try {
return (Map<Object, Object>) clazz.newInstance();
} catch (Exception e) {
throw new JSONException("unsupport type " + type, e);
}
}
public int getFastMatchToken() {
return JSONToken.LBRACE;
}
}