/*
* 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.util;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Proxy;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.lang.reflect.WildcardType;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.annotation.JSONType;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.parser.deserializer.FieldDeserializer;
/**
* @author wenshao<szujobs@hotmail.com>
*/
public class TypeUtils {
public static final String castToString(Object value) {
if (value == null) {
return null;
}
return value.toString();
}
public static final Byte castToByte(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).byteValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
return Byte.parseByte(strVal);
}
throw new JSONException("can not cast to byte, value : " + value);
}
public static final Character castToChar(Object value) {
if (value == null) {
return null;
}
if (value instanceof Character) {
return (Character) value;
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
if (strVal.length() != 1) {
throw new JSONException("can not cast to byte, value : " + value);
}
return strVal.charAt(0);
}
throw new JSONException("can not cast to byte, value : " + value);
}
public static final Short castToShort(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).shortValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
return Short.parseShort(strVal);
}
throw new JSONException("can not cast to short, value : " + value);
}
public static final BigDecimal castToBigDecimal(Object value) {
if (value == null) {
return null;
}
if (value instanceof BigDecimal) {
return (BigDecimal) value;
}
if (value instanceof BigInteger) {
return new BigDecimal((BigInteger) value);
}
String strVal = value.toString();
if (strVal.length() == 0) {
return null;
}
return new BigDecimal(strVal);
}
public static final BigInteger castToBigInteger(Object value) {
if (value == null) {
return null;
}
if (value instanceof BigInteger) {
return (BigInteger) value;
}
if (value instanceof Float || value instanceof Double) {
return BigInteger.valueOf(((Number) value).longValue());
}
String strVal = value.toString();
if (strVal.length() == 0) {
return null;
}
return new BigInteger(strVal);
}
public static final Float castToFloat(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).floatValue();
}
if (value instanceof String) {
String strVal = value.toString();
if (strVal.length() == 0) {
return null;
}
return Float.parseFloat(strVal);
}
throw new JSONException("can not cast to float, value : " + value);
}
public static final Double castToDouble(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).doubleValue();
}
if (value instanceof String) {
String strVal = value.toString();
if (strVal.length() == 0) {
return null;
}
return Double.parseDouble(strVal);
}
throw new JSONException("can not cast to double, value : " + value);
}
public static final Date castToDate(Object value) {
if (value == null) {
return null;
}
if (value instanceof Calendar) {
return ((Calendar) value).getTime();
}
if (value instanceof Date) {
return (Date) value;
}
long longValue = 0;
if (value instanceof Number) {
longValue = ((Number) value).longValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.indexOf('-') != -1) {
String format;
if (strVal.length() == JSON.DEFFAULT_DATE_FORMAT.length()) {
format = JSON.DEFFAULT_DATE_FORMAT;
} else if (strVal.length() == 10) {
format = "yyyy-MM-dd";
} else if (strVal.length() == "yyyy-MM-dd HH:mm:ss".length()) {
format = "yyyy-MM-dd HH:mm:ss";
} else {
format = "yyyy-MM-dd HH:mm:ss.SSS";
}
SimpleDateFormat dateFormat = new SimpleDateFormat(format);
try {
return (Date) dateFormat.parse(strVal);
} catch (ParseException e) {
throw new JSONException("can not cast to Date, value : " + strVal);
}
}
if (strVal.length() == 0) {
return null;
}
longValue = Long.parseLong(strVal);
}
if (longValue <= 0) {
throw new JSONException("can not cast to Date, value : " + value);
}
return new Date(longValue);
}
public static final java.sql.Date castToSqlDate(Object value) {
if (value == null) {
return null;
}
if (value instanceof Calendar) {
return new java.sql.Date(((Calendar) value).getTimeInMillis());
}
if (value instanceof java.sql.Date) {
return (java.sql.Date) value;
}
if (value instanceof java.util.Date) {
return new java.sql.Date(((java.util.Date) value).getTime());
}
long longValue = 0;
if (value instanceof Number) {
longValue = ((Number) value).longValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
longValue = Long.parseLong(strVal);
}
if (longValue <= 0) {
throw new JSONException("can not cast to Date, value : " + value);
}
return new java.sql.Date(longValue);
}
public static final java.sql.Timestamp castToTimestamp(Object value) {
if (value == null) {
return null;
}
if (value instanceof Calendar) {
return new java.sql.Timestamp(((Calendar) value).getTimeInMillis());
}
if (value instanceof java.sql.Timestamp) {
return (java.sql.Timestamp) value;
}
if (value instanceof java.util.Date) {
return new java.sql.Timestamp(((java.util.Date) value).getTime());
}
long longValue = 0;
if (value instanceof Number) {
longValue = ((Number) value).longValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
longValue = Long.parseLong(strVal);
}
if (longValue <= 0) {
throw new JSONException("can not cast to Date, value : " + value);
}
return new java.sql.Timestamp(longValue);
}
public static final Long castToLong(Object value) {
if (value == null) {
return null;
}
if (value instanceof Number) {
return ((Number) value).longValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
return Long.parseLong(strVal);
}
throw new JSONException("can not cast to long, value : " + value);
}
public static final Integer castToInt(Object value) {
if (value == null) {
return null;
}
if (value instanceof Integer) {
return (Integer) value;
}
if (value instanceof Number) {
return ((Number) value).intValue();
}
if (value instanceof String) {
String strVal = (String) value;
if (strVal.length() == 0) {
return null;
}
return Integer.parseInt(strVal);
}
throw new JSONException("can not cast to int, value : " + value);
}
public static final byte[] castToBytes(Object value) {
if (value instanceof byte[]) {
return (byte[]) value;
}
if (value instanceof String) {
return Base64.decodeFast((String) value);
}
throw new JSONException("can not cast to int, value : " + value);
}
public static final Boolean castToBoolean(Object value) {
if (value == null) {
return null;
}
if (value instanceof Boolean) {
return (Boolean) value;
}
if (value instanceof Number) {
return ((Number) value).intValue() == 1;
}
if (value instanceof String) {
String str = (String) value;
if (str.length() == 0) {
return null;
}
if ("true".equals(str)) {
return Boolean.TRUE;
}
if ("false".equals(str)) {
return Boolean.FALSE;
}
if ("1".equals(str)) {
return Boolean.TRUE;
}
}
throw new JSONException("can not cast to int, value : " + value);
}
public static final <T> T castToJavaBean(Object obj, Class<T> clazz) {
return cast(obj, clazz, ParserConfig.getGlobalInstance());
}
@SuppressWarnings({"unchecked", "rawtypes"})
public static final <T> T cast(Object obj, Class<T> clazz, ParserConfig mapping) {
if (obj == null) {
return null;
}
if (clazz == null) {
throw new IllegalArgumentException("clazz is null");
}
if (clazz == obj.getClass()) {
return (T) obj;
}
if (obj instanceof Map) {
if (clazz == Map.class) {
return (T) obj;
}
return castToJavaBean((Map<String, Object>) obj, clazz, mapping);
}
if (clazz.isArray()) {
if (obj instanceof Collection) {
Collection collection = (Collection) obj;
int index = 0;
Object array = Array.newInstance(clazz.getComponentType(), collection.size());
for (Object item : collection) {
Object value = cast(item, clazz.getComponentType(), mapping);
Array.set(array, index, value);
index++;
}
return (T) array;
}
}
if (clazz.isAssignableFrom(obj.getClass())) {
return (T) obj;
}
if (clazz == boolean.class || clazz == Boolean.class) {
return (T) castToBoolean(obj);
}
if (clazz == byte.class || clazz == Byte.class) {
return (T) castToByte(obj);
}
// if (clazz == char.class || clazz == Character.class) {
// return (T) castToCharacter(obj);
// }
if (clazz == short.class || clazz == Short.class) {
return (T) castToShort(obj);
}
if (clazz == int.class || clazz == Integer.class) {
return (T) castToInt(obj);
}
if (clazz == long.class || clazz == Long.class) {
return (T) castToLong(obj);
}
if (clazz == float.class || clazz == Float.class) {
return (T) castToFloat(obj);
}
if (clazz == double.class || clazz == Double.class) {
return (T) castToDouble(obj);
}
if (clazz == String.class) {
return (T) castToString(obj);
}
if (clazz == BigDecimal.class) {
return (T) castToBigDecimal(obj);
}
if (clazz == BigInteger.class) {
return (T) castToBigInteger(obj);
}
if (clazz == Date.class) {
return (T) castToDate(obj);
}
if (clazz == java.sql.Date.class) {
return (T) castToSqlDate(obj);
}
if (clazz == java.sql.Timestamp.class) {
return (T) castToTimestamp(obj);
}
if (clazz.isEnum()) {
return (T) castToEnum(obj, clazz, mapping);
}
if (Calendar.class.isAssignableFrom(clazz)) {
Date date = castToDate(obj);
Calendar calendar;
if (clazz == Calendar.class) {
calendar = Calendar.getInstance();
} else {
try {
calendar = (Calendar) clazz.newInstance();
} catch (Exception e) {
throw new JSONException("can not cast to : " + clazz.getName(), e);
}
}
calendar.setTime(date);
return (T) calendar;
}
if (obj instanceof String) {
String strVal = (String) obj;
if (strVal.length() == 0) {
return null;
}
}
throw new JSONException("can not cast to : " + clazz.getName());
}
@SuppressWarnings({"unchecked", "rawtypes"})
public static final <T> T castToEnum(Object obj, Class<T> clazz, ParserConfig mapping) {
try {
if (obj instanceof String) {
String name = (String) obj;
if (name.length() == 0) {
return null;
}
return (T) Enum.valueOf((Class<? extends Enum>) clazz, name);
}
if (obj instanceof Number) {
int ordinal = ((Number) obj).intValue();
Method method = clazz.getMethod("values");
Object[] values = (Object[]) method.invoke(null);
for (Object value : values) {
Enum e = (Enum) value;
if (e.ordinal() == ordinal) {
return (T) e;
}
}
}
} catch (Exception ex) {
throw new JSONException("can not cast to : " + clazz.getName(), ex);
}
throw new JSONException("can not cast to : " + clazz.getName());
}
@SuppressWarnings("unchecked")
public static final <T> T cast(Object obj, Type type, ParserConfig mapping) {
if (obj == null) {
return null;
}
if (type instanceof Class) {
return (T) cast(obj, (Class<T>) type, mapping);
}
if (type instanceof ParameterizedType) {
return (T) cast(obj, (ParameterizedType) type, mapping);
}
if (obj instanceof String) {
String strVal = (String) obj;
if (strVal.length() == 0) {
return null;
}
}
if (type instanceof TypeVariable) {
return (T) obj;
}
throw new JSONException("can not cast to : " + type);
}
@SuppressWarnings({"rawtypes", "unchecked"})
public static final <T> T cast(Object obj, ParameterizedType type, ParserConfig mapping) {
Type rawTye = type.getRawType();
if (rawTye == List.class || rawTye == ArrayList.class) {
Type itemType = type.getActualTypeArguments()[0];
if (obj instanceof Iterable) {
List list = new ArrayList();
for (Iterator it = ((Iterable) obj).iterator(); it.hasNext();) {
Object item = it.next();
list.add(cast(item, itemType, mapping));
}
return (T) list;
}
}
if (rawTye == Map.class || rawTye == HashMap.class) {
Type keyType = type.getActualTypeArguments()[0];
Type valueType = type.getActualTypeArguments()[1];
if (obj instanceof Map) {
Map map = new HashMap();
for (Map.Entry entry : ((Map<?, ?>) obj).entrySet()) {
Object key = cast(entry.getKey(), keyType, mapping);
Object value = cast(entry.getValue(), valueType, mapping);
map.put(key, value);
}
return (T) map;
}
}
if (obj instanceof String) {
String strVal = (String) obj;
if (strVal.length() == 0) {
return null;
}
}
if (type.getActualTypeArguments().length == 1) {
Type argType = type.getActualTypeArguments()[0];
if (argType instanceof WildcardType) {
return (T) cast(obj, rawTye, mapping);
}
}
throw new JSONException("can not cast to : " + type);
}
@SuppressWarnings({"unchecked"})
public static final <T> T castToJavaBean(Map<String, Object> map, Class<T> clazz, ParserConfig mapping) {
try {
if (clazz == StackTraceElement.class) {
String declaringClass = (String) map.get("className");
String methodName = (String) map.get("methodName");
String fileName = (String) map.get("fileName");
int lineNumber;
{
Number value = (Number) map.get("lineNumber");
if (value == null) {
lineNumber = 0;
} else {
lineNumber = value.intValue();
}
}
return (T) new StackTraceElement(declaringClass, methodName, fileName, lineNumber);
}
{
Object iClassObject = map.get("@type");
if (iClassObject instanceof String) {
String className = (String) iClassObject;
clazz = (Class<T>) loadClass(className);
if (clazz == null) {
throw new ClassNotFoundException(className + " not found");
}
}
}
if (clazz.isInterface()) {
JSONObject object;
if (map instanceof JSONObject) {
object = (JSONObject) map;
} else {
object = new JSONObject(map);
}
return (T) Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
new Class<?>[]{clazz}, object);
}
Map<String, FieldDeserializer> setters = mapping.getFieldDeserializers(clazz);
T object = clazz.newInstance();
for (Map.Entry<String, FieldDeserializer> entry : setters.entrySet()) {
String key = entry.getKey();
Method method = entry.getValue().getMethod();
if (isJSONTypeIgnore(clazz, key)) {
continue;
}
if (map.containsKey(key)) {
Object value = map.get(key);
value = cast(value, method.getGenericParameterTypes()[0], mapping);
method.invoke(object, new Object[]{value});
}
}
return object;
} catch (Exception e) {
throw new JSONException(e.getMessage(), e);
}
}
private static ConcurrentMap<String, Class<?>> mappings = new ConcurrentHashMap<String, Class<?>>();
static {
addBaseClassMappings();
}
public static void addClassMapping(String className, Class<?> clazz) {
if (className == null) {
className = clazz.getName();
}
mappings.put(className, clazz);
}
public static void addBaseClassMappings() {
mappings.put("byte", byte.class);
mappings.put("short", short.class);
mappings.put("int", int.class);
mappings.put("long", long.class);
mappings.put("float", float.class);
mappings.put("double", double.class);
mappings.put("boolean", boolean.class);
mappings.put("char", char.class);
mappings.put("[byte", byte[].class);
mappings.put("[short", short[].class);
mappings.put("[int", int[].class);
mappings.put("[long", long[].class);
mappings.put("[float", float[].class);
mappings.put("[double", double[].class);
mappings.put("[boolean", boolean[].class);
mappings.put("[char", char[].class);
mappings.put(HashMap.class.getName(), HashMap.class);
}
public static void clearClassMapping() {
mappings.clear();
addBaseClassMappings();
}
public static Class<?> loadClass(String className) {
if (className == null || className.length() == 0) {
return null;
}
Class<?> clazz = mappings.get(className);
if (clazz != null) {
return clazz;
}
if (className.charAt(0) == '[') {
Class<?> componentType = loadClass(className.substring(1));
return Array.newInstance(componentType, 0).getClass();
}
if (className.startsWith("L") && className.endsWith(";")) {
String newClassName = className.substring(1, className.length() - 1);
return loadClass(newClassName);
}
try {
clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
addClassMapping(className, clazz);
return clazz;
} catch (Throwable e) {
// skip
}
try {
clazz = Class.forName(className);
addClassMapping(className, clazz);
return clazz;
} catch (Throwable e) {
// skip
}
return clazz;
}
public static List<FieldInfo> computeGetters(Class<?> clazz, Map<String, String> aliasMap) {
return computeGetters(clazz, aliasMap, true);
}
public static List<FieldInfo> computeGetters(Class<?> clazz, Map<String, String> aliasMap, boolean sorted) {
Map<String, FieldInfo> fieldInfoMap = new LinkedHashMap<String, FieldInfo>();
for (Method method : clazz.getMethods()) {
String methodName = method.getName();
if (Modifier.isStatic(method.getModifiers())) {
continue;
}
if (method.getReturnType().equals(Void.TYPE)) {
continue;
}
if (method.getParameterTypes().length != 0) {
continue;
}
if (method.getReturnType() == ClassLoader.class) {
continue;
}
if (method.getName().equals("getMetaClass")
&& method.getReturnType().getName().equals("groovy.lang.MetaClass")) {
continue;
}
JSONField annotation = method.getAnnotation(JSONField.class);
if (annotation != null) {
if (!annotation.serialize()) {
continue;
}
if (annotation.name().length() != 0) {
String propertyName = annotation.name();
if (aliasMap != null) {
propertyName = aliasMap.get(propertyName);
if (propertyName == null) {
continue;
}
}
fieldInfoMap.put(propertyName, new FieldInfo(propertyName, method, null));
continue;
}
}
if (methodName.startsWith("get")) {
if (methodName.length() < 4) {
continue;
}
if (methodName.equals("getClass")) {
continue;
}
if (!Character.isUpperCase(methodName.charAt(3))) {
continue;
}
String propertyName = Character.toLowerCase(methodName.charAt(3)) + methodName.substring(4);
if (isJSONTypeIgnore(clazz, propertyName)) {
continue;
}
Field field = ParserConfig.getField(clazz, propertyName);
if (field != null) {
JSONField fieldAnnotation = field.getAnnotation(JSONField.class);
if (fieldAnnotation != null && fieldAnnotation.name().length() != 0) {
propertyName = fieldAnnotation.name();
if (aliasMap != null) {
propertyName = aliasMap.get(propertyName);
if (propertyName == null) {
continue;
}
}
}
}
if (aliasMap != null) {
propertyName = aliasMap.get(propertyName);
if (propertyName == null) {
continue;
}
}
fieldInfoMap.put(propertyName, new FieldInfo(propertyName, method, field));
}
if (methodName.startsWith("is")) {
if (methodName.length() < 3) {
continue;
}
if (!Character.isUpperCase(methodName.charAt(2))) {
continue;
}
String propertyName = Character.toLowerCase(methodName.charAt(2)) + methodName.substring(3);
if (isJSONTypeIgnore(clazz, propertyName)) {
continue;
}
Field field = ParserConfig.getField(clazz, propertyName);
if (field != null) {
JSONField fieldAnnotation = field.getAnnotation(JSONField.class);
if (fieldAnnotation != null && fieldAnnotation.name().length() != 0) {
propertyName = fieldAnnotation.name();
if (aliasMap != null) {
propertyName = aliasMap.get(propertyName);
if (propertyName == null) {
continue;
}
}
}
}
if (aliasMap != null) {
propertyName = aliasMap.get(propertyName);
if (propertyName == null) {
continue;
}
}
fieldInfoMap.put(propertyName, new FieldInfo(propertyName, method, field));
}
}
for (Field field : clazz.getFields()) {
if (Modifier.isStatic(field.getModifiers())) {
continue;
}
if (!Modifier.isPublic(field.getModifiers())) {
continue;
}
if (!fieldInfoMap.containsKey(field.getName())) {
fieldInfoMap.put(field.getName(), new FieldInfo(field.getName(), null, field));
}
}
List<FieldInfo> fieldInfoList = new ArrayList<FieldInfo>();
boolean containsAll = false;
String[] orders = null;
JSONType annotation = clazz.getAnnotation(JSONType.class);
if (annotation != null) {
orders = annotation.orders();
if (orders != null && orders.length == fieldInfoMap.size()) {
containsAll = true;
for (String item : orders) {
if (!fieldInfoMap.containsKey(item)) {
containsAll = false;
break;
}
}
} else {
containsAll = false;
}
}
if (containsAll) {
for (String item : orders) {
FieldInfo fieldInfo = fieldInfoMap.get(item);
fieldInfoList.add(fieldInfo);
}
} else {
for (FieldInfo fieldInfo : fieldInfoMap.values()) {
fieldInfoList.add(fieldInfo);
}
if (sorted) {
Collections.sort(fieldInfoList);
}
}
return fieldInfoList;
}
private static boolean isJSONTypeIgnore(Class<?> clazz, String propertyName) {
JSONType jsonType = clazz.getAnnotation(JSONType.class);
if (jsonType != null && jsonType.ignores() != null) {
for (String item : jsonType.ignores()) {
if (propertyName.equalsIgnoreCase(item)) {
return true;
}
}
}
if (clazz.getSuperclass() != Object.class && clazz.getSuperclass() != null) {
if (isJSONTypeIgnore(clazz.getSuperclass(), propertyName)) {
return true;
}
}
return false;
}
public static Class<?> getClass(Type type) {
if (type.getClass() == Class.class) {
return (Class<?>) type;
}
if (type instanceof ParameterizedType) {
return getClass(((ParameterizedType) type).getRawType());
}
return Object.class;
}
}