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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.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Iterator;
import java.util.Map;
/**
* Serialize Java Object(s) into a JSON structure.
*
* @author Nicholas
* Created on 24/07/2013
*/
public class JSONStructureMarshaller {
protected JSONObjectMappings objectMappings;
protected Map classMappings;
public JSONStructureMarshaller(JSONObjectMappings objectMappings) {
this.objectMappings = objectMappings;
this.classMappings = objectMappings.classMappings;
}
public JSONStructure toJSON(T srcObj) throws JSONException {
return toJSON( srcObj, null );
}
public JSONStructure toJSON(T srcObj, JSONConverterAbstract[] converters) throws JSONException {
Boolean booleanVal;
Integer intVal;
Long longVal;
Float floatVal;
Double doubleVal;
BigInteger bigIntegerVal;
BigDecimal bigDecimalVal;
String stringVal;
byte[] byteArray;
Object objectVal;
Object array_object;
boolean[] arrayOf_boolean;
int[] arrayOf_int;
long[] arrayOf_long;
float[] arrayOf_float;
double[] arrayOf_double;
Boolean[] arrayOf_Boolean;
Integer[] arrayOf_Integer;
Long[] arrayOf_Long;
Float[] arrayOf_Float;
Double[] arrayOf_Double;
BigInteger[] arrayOf_BigInteger;
BigDecimal[] arrayOf_BigDecimal;
String[] arrayOf_String;
Object[] arrayOf_Object;
JSONObjectMapping json_om = classMappings.get( srcObj.getClass().getName() );
if ( json_om == null ) {
throw new IllegalArgumentException( "Class '" + srcObj.getClass().getName() + "' not registered." );
}
if ( json_om.converters == true && converters == null ) {
throw new JSONException( "Class '" + srcObj.getClass().getName() + "' may required converters!" );
}
JSONStructure json_struct = new JSONObject();
JSONArray json_array;
try {
Iterator fieldMappingsIter = json_om.fieldMappingsList.iterator();
JSONObjectFieldMapping fieldMapping;
JSONValue json_value;
int len;
while ( fieldMappingsIter.hasNext() ) {
fieldMapping = fieldMappingsIter.next();
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
booleanVal = fieldMapping.field.getBoolean( srcObj );
if ( fieldMapping.converterId == -1 ) {
json_value = JSONBoolean.Boolean( booleanVal );
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, booleanVal );
if ( json_value == null || json_value.type == JSONConstants.VT_NULL ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_INTEGER:
intVal = fieldMapping.field.getInt( srcObj );
if ( fieldMapping.converterId == -1 ) {
json_value = JSONNumber.Integer( intVal );
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, intVal );
if ( json_value == null || json_value.type == JSONConstants.VT_NULL ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_LONG:
longVal = fieldMapping.field.getLong( srcObj );
if ( fieldMapping.converterId == -1 ) {
json_value = JSONNumber.Long( longVal );
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, longVal );
if ( json_value == null || json_value.type == JSONConstants.VT_NULL ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_FLOAT:
floatVal = fieldMapping.field.getFloat( srcObj );
if ( fieldMapping.converterId == -1 ) {
json_value = JSONNumber.Float( floatVal );
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, floatVal );
if ( json_value == null || json_value.type == JSONConstants.VT_NULL ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_DOUBLE:
doubleVal = fieldMapping.field.getDouble( srcObj );
if ( fieldMapping.converterId == -1 ) {
json_value = JSONNumber.Double( doubleVal );
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, doubleVal );
if ( json_value == null || json_value.type == JSONConstants.VT_NULL ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_BOOLEAN:
booleanVal = (Boolean)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( booleanVal != null ) {
json_value = JSONBoolean.Boolean( booleanVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, booleanVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_INTEGER:
intVal = (Integer)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( intVal != null ) {
json_value = JSONNumber.Integer( intVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, intVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_LONG:
longVal = (Long)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( longVal != null ) {
json_value = JSONNumber.Long( longVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, longVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_FLOAT:
floatVal = (Float)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( floatVal != null ) {
json_value = JSONNumber.Float( floatVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, floatVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_DOUBLE:
doubleVal = (Double)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( doubleVal != null ) {
json_value = JSONNumber.Double( doubleVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, doubleVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_BIGINTEGER:
bigIntegerVal = (BigInteger)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( bigIntegerVal != null ) {
json_value = JSONNumber.BigInteger( bigIntegerVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, bigIntegerVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_BIGDECIMAL:
bigDecimalVal = (BigDecimal)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( bigDecimalVal != null ) {
json_value = JSONNumber.BigDecimal( bigDecimalVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, bigDecimalVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_STRING:
stringVal = (String)fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( stringVal != null ) {
json_value = JSONString.String( stringVal );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, stringVal );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_BYTEARRAY:
byteArray = (byte[])fieldMapping.field.get( srcObj );
if ( fieldMapping.converterId == -1 ) {
if ( byteArray != null ) {
json_value = JSONString.String( byteArray );
}
else {
json_value = null;
}
}
else {
json_value = converters[ fieldMapping.converterId ].getJSONValue( fieldMapping.fieldName, byteArray );
}
if ( json_value == null ) {
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_OBJECT:
objectVal = (Object)fieldMapping.field.get( srcObj );
if ( objectVal != null ) {
json_value = toJSON( objectVal, converters );
}
else if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
json_value = JSONNull.Null;
}
json_struct.put( fieldMapping.jsonName, json_value );
break;
case JSONObjectMappingConstants.T_ARRAY:
array_object = fieldMapping.field.get( srcObj );
if ( array_object != null ) {
len = Array.getLength( array_object );
json_array = new JSONArray();
switch ( fieldMapping.arrayType ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
arrayOf_boolean = (boolean[])array_object;
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