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Adapter alibaba fastjson to other json libraries. the fastjson version: 1.2.58
/*
* Copyright 2019 the original author or authors.
*
* Licensed under the Apache, 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.gnu.org/licenses/lgpl-3.0.html
*
* 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 com.alibaba.fastjson.annotation.JSONField;
import java.lang.annotation.Annotation;
import java.lang.reflect.*;
public class FieldInfo implements Comparable {
public final String name;
public final Method method;
public final Field field;
private int ordinal = 0;
public final Class fieldClass;
public final Type fieldType;
public final Class declaringClass;
public final boolean getOnly;
public final int serialzeFeatures;
public final int parserFeatures;
public final String label;
private final JSONField fieldAnnotation;
private final JSONField methodAnnotation;
public final boolean fieldAccess;
public final boolean fieldTransient;
public final char[] name_chars;
public final boolean isEnum;
public final boolean jsonDirect;
public final boolean unwrapped;
public final String format;
public final String[] alternateNames;
public FieldInfo(String name, //
Class declaringClass, //
Class fieldClass, //
Type fieldType, //
Field field, //
int ordinal, //
int serialzeFeatures, //
int parserFeatures) {
if (ordinal < 0) {
ordinal = 0;
}
this.name = name;
this.declaringClass = declaringClass;
this.fieldClass = fieldClass;
this.fieldType = fieldType;
this.method = null;
this.field = field;
this.ordinal = ordinal;
this.serialzeFeatures = serialzeFeatures;
this.parserFeatures = parserFeatures;
isEnum = fieldClass.isEnum();
if (field != null) {
int modifiers = field.getModifiers();
fieldAccess = (modifiers & Modifier.PUBLIC) != 0 || method == null;
fieldTransient = Modifier.isTransient(modifiers);
} else {
fieldTransient = false;
fieldAccess = false;
}
name_chars = genFieldNameChars();
if (field != null) {
TypeUtils.setAccessible(field);
}
this.label = "";
fieldAnnotation = null;
methodAnnotation = null;
this.getOnly = false;
this.jsonDirect = false;
this.unwrapped = false;
this.format = null;
this.alternateNames = new String[0];
}
public FieldInfo(String name, //
Method method, //
Field field, //
Class clazz, //
Type type, //
int ordinal, //
int serialzeFeatures, //
int parserFeatures, //
JSONField fieldAnnotation, //
JSONField methodAnnotation, //
String label) {
if (field != null) {
String fieldName = field.getName();
if (fieldName.equals(name)) {
name = fieldName;
}
}
if (ordinal < 0) {
ordinal = 0;
}
this.name = name;
this.method = method;
this.field = field;
this.ordinal = ordinal;
this.serialzeFeatures = serialzeFeatures;
this.parserFeatures = parserFeatures;
this.fieldAnnotation = fieldAnnotation;
this.methodAnnotation = methodAnnotation;
if (field != null) {
int modifiers = field.getModifiers();
fieldAccess = ((modifiers & Modifier.PUBLIC) != 0 || method == null);
fieldTransient = Modifier.isTransient(modifiers)
|| TypeUtils.isTransient(method);
} else {
fieldAccess = false;
fieldTransient = false;
}
if (label != null && label.length() > 0) {
this.label = label;
} else {
this.label = "";
}
String format = null;
JSONField annotation = getAnnotation();
boolean jsonDirect = false;
if (annotation != null) {
format = annotation.format();
if (format.trim().length() == 0) {
format = null;
}
jsonDirect = annotation.jsonDirect();
unwrapped = annotation.unwrapped();
alternateNames = annotation.alternateNames();
} else {
jsonDirect = false;
unwrapped = false;
alternateNames = new String[0];
}
this.format = format;
name_chars = genFieldNameChars();
if (method != null) {
TypeUtils.setAccessible(method);
}
if (field != null) {
TypeUtils.setAccessible(field);
}
boolean getOnly = false;
Type fieldType;
Class fieldClass;
if (method != null) {
Class[] types;
if ((types = method.getParameterTypes()).length == 1) {
fieldClass = types[0];
fieldType = method.getGenericParameterTypes()[0];
} else if (types.length == 2 && types[0] == String.class && types[1] == Object.class) {
fieldType = fieldClass = types[0];
} else {
fieldClass = method.getReturnType();
fieldType = method.getGenericReturnType();
getOnly = true;
}
this.declaringClass = method.getDeclaringClass();
} else {
fieldClass = field.getType();
fieldType = field.getGenericType();
this.declaringClass = field.getDeclaringClass();
getOnly = Modifier.isFinal(field.getModifiers());
}
this.getOnly = getOnly;
this.jsonDirect = jsonDirect && fieldClass == String.class;
if (clazz != null && fieldClass == Object.class && fieldType instanceof TypeVariable) {
TypeVariable tv = (TypeVariable) fieldType;
Type genericFieldType = getInheritGenericType(clazz, type, tv);
if (genericFieldType != null) {
this.fieldClass = TypeUtils.getClass(genericFieldType);
this.fieldType = genericFieldType;
isEnum = fieldClass.isEnum();
return;
}
}
Type genericFieldType = fieldType;
if (!(fieldType instanceof Class)) {
genericFieldType = getFieldType(clazz, type != null ? type : clazz, fieldType);
if (genericFieldType != fieldType) {
if (genericFieldType instanceof ParameterizedType) {
fieldClass = TypeUtils.getClass(genericFieldType);
} else if (genericFieldType instanceof Class) {
fieldClass = TypeUtils.getClass(genericFieldType);
}
}
}
this.fieldType = genericFieldType;
this.fieldClass = fieldClass;
isEnum = fieldClass.isEnum();
}
protected char[] genFieldNameChars() {
int nameLen = this.name.length();
char[] name_chars = new char[nameLen + 3];
this.name.getChars(0, this.name.length(), name_chars, 1);
name_chars[0] = '"';
name_chars[nameLen + 1] = '"';
name_chars[nameLen + 2] = ':';
return name_chars;
}
@SuppressWarnings("unchecked")
public T getAnnation(Class annotationClass) {
if (annotationClass == JSONField.class) {
return (T) getAnnotation();
}
T annotatition = null;
if (method != null) {
annotatition = method.getAnnotation(annotationClass);
}
if (annotatition == null && field != null) {
annotatition = field.getAnnotation(annotationClass);
}
return annotatition;
}
public static Type getFieldType(final Class clazz, final Type type, Type fieldType) {
if (clazz == null || type == null) {
return fieldType;
}
if (fieldType instanceof GenericArrayType) {
GenericArrayType genericArrayType = (GenericArrayType) fieldType;
Type componentType = genericArrayType.getGenericComponentType();
Type componentTypeX = getFieldType(clazz, type, componentType);
if (componentType != componentTypeX) {
Type fieldTypeX = Array.newInstance(TypeUtils.getClass(componentTypeX), 0).getClass();
return fieldTypeX;
}
return fieldType;
}
if (!TypeUtils.isGenericParamType(type)) {
return fieldType;
}
if (fieldType instanceof TypeVariable) {
ParameterizedType paramType = (ParameterizedType) TypeUtils.getGenericParamType(type);
Class parameterizedClass = TypeUtils.getClass(paramType);
final TypeVariable typeVar = (TypeVariable) fieldType;
TypeVariable[] typeVariables = parameterizedClass.getTypeParameters();
for (int i = 0; i < typeVariables.length; ++i) {
if (typeVariables[i].getName().equals(typeVar.getName())) {
fieldType = paramType.getActualTypeArguments()[i];
return fieldType;
}
}
}
if (fieldType instanceof ParameterizedType) {
ParameterizedType parameterizedFieldType = (ParameterizedType) fieldType;
Type[] arguments = parameterizedFieldType.getActualTypeArguments();
TypeVariable[] typeVariables;
ParameterizedType paramType;
if (type instanceof ParameterizedType) {
paramType = (ParameterizedType) type;
typeVariables = clazz.getTypeParameters();
} else if (clazz.getGenericSuperclass() instanceof ParameterizedType) {
paramType = (ParameterizedType) clazz.getGenericSuperclass();
typeVariables = clazz.getSuperclass().getTypeParameters();
} else {
paramType = parameterizedFieldType;
typeVariables = type.getClass().getTypeParameters();
}
boolean changed = getArgument(arguments, typeVariables, paramType.getActualTypeArguments());
if (changed) {
fieldType = new ParameterizedTypeImpl(arguments, parameterizedFieldType.getOwnerType(),
parameterizedFieldType.getRawType());
return fieldType;
}
}
return fieldType;
}
private static boolean getArgument(Type[] typeArgs, TypeVariable[] typeVariables, Type[] arguments) {
if (arguments == null || typeVariables.length == 0) {
return false;
}
boolean changed = false;
for (int i = 0; i < typeArgs.length; ++i) {
Type typeArg = typeArgs[i];
if (typeArg instanceof ParameterizedType) {
ParameterizedType p_typeArg = (ParameterizedType) typeArg;
Type[] p_typeArg_args = p_typeArg.getActualTypeArguments();
boolean p_changed = getArgument(p_typeArg_args, typeVariables, arguments);
if (p_changed) {
typeArgs[i] = new ParameterizedTypeImpl(p_typeArg_args, p_typeArg.getOwnerType(), p_typeArg.getRawType());
changed = true;
}
} else if (typeArg instanceof TypeVariable) {
for (int j = 0; j < typeVariables.length; ++j) {
if (typeArg.equals(typeVariables[j])) {
typeArgs[i] = arguments[j];
changed = true;
}
}
}
}
return changed;
}
private static Type getInheritGenericType(Class clazz, Type type, TypeVariable tv) {
GenericDeclaration gd = tv.getGenericDeclaration();
Class class_gd = null;
if (gd instanceof Class) {
class_gd = (Class) tv.getGenericDeclaration();
}
Type[] arguments = null;
if (class_gd == clazz) {
if (type instanceof ParameterizedType) {
ParameterizedType ptype = (ParameterizedType) type;
arguments = ptype.getActualTypeArguments();
}
} else {
for (Class c = clazz; c != null && c != Object.class && c != class_gd; c = c.getSuperclass()) {
Type superType = c.getGenericSuperclass();
if (superType instanceof ParameterizedType) {
ParameterizedType p_superType = (ParameterizedType) superType;
Type[] p_superType_args = p_superType.getActualTypeArguments();
getArgument(p_superType_args, c.getTypeParameters(), arguments);
arguments = p_superType_args;
}
}
}
if (arguments == null || class_gd == null) {
return null;
}
Type actualType = null;
TypeVariable[] typeVariables = class_gd.getTypeParameters();
for (int j = 0; j < typeVariables.length; ++j) {
if (tv.equals(typeVariables[j])) {
actualType = arguments[j];
break;
}
}
return actualType;
}
@Override
public String toString() {
return this.name;
}
public Member getMember() {
if (method != null) {
return method;
} else {
return field;
}
}
protected Class getDeclaredClass() {
if (this.method != null) {
return this.method.getDeclaringClass();
}
if (this.field != null) {
return this.field.getDeclaringClass();
}
return null;
}
public int compareTo(FieldInfo o) {
if (this.ordinal < o.ordinal) {
return -1;
}
if (this.ordinal > o.ordinal) {
return 1;
}
int result = this.name.compareTo(o.name);
if (result != 0) {
return result;
}
Class thisDeclaringClass = this.getDeclaredClass();
Class otherDeclaringClass = o.getDeclaredClass();
if (thisDeclaringClass != null && otherDeclaringClass != null && thisDeclaringClass != otherDeclaringClass) {
if (thisDeclaringClass.isAssignableFrom(otherDeclaringClass)) {
return -1;
}
if (otherDeclaringClass.isAssignableFrom(thisDeclaringClass)) {
return 1;
}
}
boolean isSampeType = this.field != null && this.field.getType() == this.fieldClass;
boolean oSameType = o.field != null && o.field.getType() == o.fieldClass;
if (isSampeType && !oSameType) {
return 1;
}
if (oSameType && !isSampeType) {
return -1;
}
if (o.fieldClass.isPrimitive() && !this.fieldClass.isPrimitive()) {
return 1;
}
if (this.fieldClass.isPrimitive() && !o.fieldClass.isPrimitive()) {
return -1;
}
if (o.fieldClass.getName().startsWith("java.") && !this.fieldClass.getName().startsWith("java.")) {
return 1;
}
if (this.fieldClass.getName().startsWith("java.") && !o.fieldClass.getName().startsWith("java.")) {
return -1;
}
return this.fieldClass.getName().compareTo(o.fieldClass.getName());
}
public JSONField getAnnotation() {
if (this.fieldAnnotation != null) {
return this.fieldAnnotation;
}
return this.methodAnnotation;
}
public String getFormat() {
return format;
}
public Object get(Object javaObject) throws IllegalAccessException, InvocationTargetException {
return method != null
? method.invoke(javaObject)
: field.get(javaObject);
}
public void set(Object javaObject, Object value) throws IllegalAccessException, InvocationTargetException {
if (method != null) {
method.invoke(javaObject, new Object[]{value});
return;
}
field.set(javaObject, value);
}
public void setAccessible() throws SecurityException {
if (method != null) {
TypeUtils.setAccessible(method);
return;
}
TypeUtils.setAccessible(field);
}
}