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A library for encoding/decoding JSON strings.
/*
* JSON library.
* Copyright 2012-2013 Antiaction (http://antiaction.com/)
*
* 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.antiaction.common.json;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.TreeMap;
import com.antiaction.common.json.annotation.JSON;
import com.antiaction.common.json.annotation.JSONConverter;
import com.antiaction.common.json.annotation.JSONIgnore;
import com.antiaction.common.json.annotation.JSONName;
import com.antiaction.common.json.annotation.JSONNullValues;
import com.antiaction.common.json.annotation.JSONNullable;
/**
* TODO javadoc
* @author Nicholas
* Created on 13/11/2012
*/
public class JSONObjectMappings {
protected final Class[] zeroArgsParameterTypes = new Class[ 0 ];
protected final Map classMappings = new TreeMap();
protected final Map converterNameIdMap = new TreeMap();
protected int converterIds = 0;
protected final JSONStructureMarshaller structureMarshaller;
protected final JSONStructureUnmarshaller structureUnmarshaller;
protected final JSONStreamMarshaller streamMarshaller;
protected final JSONStreamUnmarshaller streamUnmarshaller;
public JSONObjectMappings() {
structureMarshaller = new JSONStructureMarshaller( this );
structureUnmarshaller = new JSONStructureUnmarshaller( this );
streamMarshaller = new JSONStreamMarshaller( this );
streamUnmarshaller = new JSONStreamUnmarshaller( this );
}
public JSONStructureMarshaller getStructureMarshaller() {
return structureMarshaller;
}
public JSONStructureUnmarshaller getStructureUnmarshaller() {
return structureUnmarshaller;
}
public JSONStreamMarshaller getStreamMarshaller() {
return streamMarshaller;
}
public JSONStreamUnmarshaller getStreamUnmarshaller() {
return streamUnmarshaller;
}
public int getConverterNameId(String converterName) throws JSONException {
Integer id = converterNameIdMap.get( converterName );
if ( id == null ) {
throw new JSONException( "Unknown conveter name: " + converterName );
}
return id;
}
public int getConverters() {
return converterIds;
}
public void register(Class clazz) throws JSONException {
if ( !classMappings.containsKey( clazz.getName() ) ) {
int classTypeMask = ClassTypeModifiers.getClassTypeModifiersMask( clazz );
if ( (classTypeMask & JSONObjectMappingConstants.CLASS_INVALID_TYPE_MODIFIERS_MASK) != 0 ) {
throw new JSONException( "Unsupported class type." );
}
classTypeMask &= JSONObjectMappingConstants.CLASS_VALID_TYPE_MODIFIERS_MASK;
if ( (classTypeMask == JSONObjectMappingConstants.VALID_CLASS) || (classTypeMask == JSONObjectMappingConstants.VALID_MEMBER_CLASS) ) {
mapClass( clazz );
}
else if ( classTypeMask == JSONObjectMappingConstants.VALID_ARRAY_CLASS ) {
mapArray( clazz );
}
else {
throw new JSONException( "Unsupported class type." );
}
}
}
protected JSONObjectMapping mapArray(Class clazz) throws JSONException {
int level;
Class fieldType = null;
JSONObjectMapping fieldObjectMapping;
JSONObjectMapping json_om = JSONObjectMapping.getArrayMapping();
classMappings.put( clazz.getName(), json_om );
try {
String arrayTypeName = clazz.getName();
// debug
//System.out.println( typeName );
Integer arrayType = JSONObjectMappingConstants.arrayTypeMappings.get( arrayTypeName );
// debug
//System.out.println( arrayType );
if ( arrayType == null ) {
level = 0;
while ( level < arrayTypeName.length() && arrayTypeName.charAt( level ) == '[' ) {
++level;
}
// [L;
if ( level == 1 && level < arrayTypeName.length() && arrayTypeName.charAt( level ) == 'L' && arrayTypeName.endsWith( ";" ) ) {
arrayType = JSONObjectMappingConstants.T_OBJECT;
arrayTypeName = arrayTypeName.substring( level + 1, arrayTypeName.length() - 1 );
fieldType = Class.forName( arrayTypeName, true, clazz.getClassLoader() );
// Cache
fieldObjectMapping = classMappings.get( arrayTypeName );
if ( fieldObjectMapping == null ) {
fieldObjectMapping = mapClass( fieldType );
}
}
else {
throw new JSONException( "Unsupported array type '" + arrayTypeName + "'." );
}
json_om.arrayType = arrayType;
json_om.className = arrayTypeName;
json_om.clazz = fieldType;
json_om.objectMapping = fieldObjectMapping;
}
} catch (ClassNotFoundException e) {
new JSONException( e );
}
return json_om;
}
protected JSONObjectMapping mapClass(Class clazz) throws JSONException {
JSONObjectFieldMapping json_fm;
JSON json;
JSONIgnore ignore;
JSONObjectMapping json_om = JSONObjectMapping.getObjectMapping();
classMappings.put( clazz.getName(), json_om );
Constructor constructor = null;
try {
constructor = clazz.getConstructor( zeroArgsParameterTypes );
}
catch (NoSuchMethodException e) {
}
if ( constructor == null ) {
throw new JSONException( clazz.getName() + " does not have a zero argument constructor!" );
}
json = clazz.getAnnotation( JSON.class );
if ( json != null ) {
String[] ignores = json.ignore();
for ( int i=0; i fieldType = null;
String fieldTypeName;
Integer type;
Integer arrayType = 0;
int fieldModsMask = 0;
int classTypeMask = 0;
JSONObjectMapping fieldObjectMapping;
int level;
JSONNullable nullable;
boolean bNullable;
JSONNullValues nullValues;
boolean bNullValues;
JSONConverter converter;
JSONName jsonName;
try {
for ( int i=0; i classType = ((Class)typeArgument);
//System.out.println( "Field " + field.getName() + " has a parameterized type of " + classType.getSimpleName() );
}
}
}
else if ( classTypeMask == JSONObjectMappingConstants.VALID_ARRAY_CLASS ) {
type = JSONObjectMappingConstants.T_ARRAY;
arrayType = JSONObjectMappingConstants.arrayTypeMappings.get( fieldTypeName );
if ( arrayType == null ) {
level = 0;
while ( level < fieldTypeName.length() && fieldTypeName.charAt( level ) == '[' ) {
++level;
}
// [L;
if ( level == 1 && level < fieldTypeName.length() && fieldTypeName.charAt( level ) == 'L' && fieldTypeName.endsWith( ";" ) ) {
arrayType = JSONObjectMappingConstants.T_OBJECT;
fieldTypeName = fieldTypeName.substring( level + 1, fieldTypeName.length() - 1 );
fieldType = Class.forName( fieldTypeName, true, clazz.getClassLoader() );
// Cache
fieldObjectMapping = classMappings.get( fieldTypeName );
if ( fieldObjectMapping == null ) {
fieldObjectMapping = mapClass( fieldType );
}
}
else {
throw new JSONException( "Unsupported array type '" + fieldTypeName + "'." );
}
}
}
else {
throw new JSONException( "Unsupported field class type." );
}
}
// debug
//System.out.println( type );
if ( type != null ) {
json_fm = new JSONObjectFieldMapping();
json_fm.fieldName = field.getName();
json_fm.type = type;
json_fm.arrayType = arrayType;
json_fm.className = fieldTypeName;
json_fm.clazz = fieldType;
json_fm.objectMapping = fieldObjectMapping;
json_fm.field = clazz.getDeclaredField( json_fm.fieldName );
json_fm.field.setAccessible( true );
bNullable = json_om.nullableSet.contains( json_fm.fieldName );
if ( !bNullable ) {
nullable = field.getAnnotation( JSONNullable.class );
if ( nullable != null ) {
bNullable = nullable.value();
}
}
if ( bNullable ) {
if ( json_fm.type < JSONObjectMappingConstants.T_OBJECT ) {
throw new JSONException( "Primitive types can not be nullable." );
}
json_fm.nullable = true;
}
bNullValues = json_om.nullValuesSet.contains( json_fm.fieldName );
if ( !bNullValues) {
nullValues = field.getAnnotation( JSONNullValues.class );
if ( nullValues != null ) {
bNullValues = nullValues.value();
}
}
if ( bNullValues ) {
if ( json_fm.type >= JSONObjectMappingConstants.T_ARRAY && json_fm.arrayType < JSONObjectMappingConstants.T_OBJECT ) {
throw new JSONException( "Array of primitive type can not have null values." );
}
json_fm.nullValues = true;
}
converter = field.getAnnotation( JSONConverter.class );
if ( converter != null ) {
json_fm.converterName = converter.name();
Integer converterId = converterNameIdMap.get( json_fm.converterName );
if ( converterId == null ) {
converterId = converterIds++;
converterNameIdMap.put( json_fm.converterName, converterId );
}
json_fm.converterId = converterId;
json_om.converters = true;
}
jsonName = field.getAnnotation( JSONName.class );
if ( jsonName != null ) {
json_fm.jsonName = jsonName.value();
}
else {
json_fm.jsonName = json_fm.fieldName;
}
json_om.fieldMappingsMap.put( json_fm.jsonName, json_fm );
json_om.fieldMappingsList.add( json_fm );
}
}
}
json_om.fieldMappingsArr = json_om.fieldMappingsList.toArray( new JSONObjectFieldMapping[ 0 ] );
}
catch (ClassNotFoundException e) {
throw new JSONException( e );
}
catch (NoSuchFieldException e) {
throw new JSONException( e );
}
catch (SecurityException e) {
throw new JSONException( e );
}
return json_om;
}
}
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