com.antiaction.common.json.JSONStructureUnmarshaller Maven / Gradle / Ivy
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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.List;
import java.util.Map;
/**
* De-serialize a JSON structure into Java Object(s).
*
* @author Nicholas
* Created on 24/07/2013
*/
public class JSONStructureUnmarshaller {
protected JSONObjectMappings objectMappings;
protected Map classMappings;
public JSONStructureUnmarshaller(JSONObjectMappings objectMappings) {
this.objectMappings = objectMappings;
this.classMappings = objectMappings.classMappings;
}
public T toObject(JSONStructure json_struct, Class clazz) throws JSONException {
return toObject( json_struct, clazz, null );
}
public T toObject(JSONStructure json_struct, Class clazz, JSONConverterAbstract[] converters) throws JSONException {
Boolean booleanVal;
Integer intVal;
Long longVal;
Float floatVal;
Double doubleVal;
BigInteger bigIntegerVal;
BigDecimal bigDecimalVal;
String stringVal;
byte[] byteArray;
Object object;
JSONObject json_object;
JSONArray json_array;
List json_values;
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( clazz.getName() );
if ( json_om == null ) {
throw new IllegalArgumentException( "Class '" + clazz.getName() + "' not registered." );
}
if ( json_om.converters == true && converters == null ) {
throw new JSONException( "Class '" + clazz.getName() + "' may required converters!" );
}
JSONObject srcJSONObject = json_struct.getObject();
T dstObj = null;
try {
dstObj = clazz.newInstance();
Iterator fieldMappingsIter = json_om.fieldMappingsList.iterator();
JSONObjectFieldMapping fieldMapping;
JSONValue json_value;
while ( fieldMappingsIter.hasNext() ) {
fieldMapping = fieldMappingsIter.next();
json_value = srcJSONObject.get( fieldMapping.jsonName );
if ( json_value != null ) {
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
if ( fieldMapping.converterId == -1 ) {
booleanVal = json_value.getBoolean();
}
else {
booleanVal = converters[ fieldMapping.converterId ].getBoolean( fieldMapping.fieldName, json_value );
}
if ( booleanVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setBoolean( dstObj, booleanVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_INTEGER:
if ( fieldMapping.converterId == -1 ) {
intVal = json_value.getInteger();
}
else {
intVal = converters[ fieldMapping.converterId ].getInteger( fieldMapping.fieldName, json_value );
}
if ( intVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setInt( dstObj, intVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_LONG:
if ( fieldMapping.converterId == -1 ) {
longVal = json_value.getLong();
}
else {
longVal = converters[ fieldMapping.converterId ].getLong( fieldMapping.fieldName, json_value );
}
if ( longVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setLong( dstObj, longVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_FLOAT:
if ( fieldMapping.converterId == -1 ) {
floatVal = json_value.getFloat();
}
else {
floatVal = converters[ fieldMapping.converterId ].getFloat( fieldMapping.fieldName, json_value );
}
if ( floatVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setFloat( dstObj, floatVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_DOUBLE:
if ( fieldMapping.converterId == -1 ) {
doubleVal = json_value.getDouble();
}
else {
doubleVal = converters[ fieldMapping.converterId ].getDouble( fieldMapping.fieldName, json_value );
}
if ( doubleVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setDouble( dstObj, doubleVal );
break;
case JSONObjectMappingConstants.T_BOOLEAN:
if ( fieldMapping.converterId == -1 ) {
booleanVal = json_value.getBoolean();
}
else {
booleanVal = converters[ fieldMapping.converterId ].getBoolean( fieldMapping.fieldName, json_value );
}
if ( booleanVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, booleanVal );
break;
case JSONObjectMappingConstants.T_INTEGER:
if ( fieldMapping.converterId == -1 ) {
intVal = json_value.getInteger();
}
else {
intVal = converters[ fieldMapping.converterId ].getInteger( fieldMapping.fieldName, json_value );
}
if ( intVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, intVal );
break;
case JSONObjectMappingConstants.T_LONG:
if ( fieldMapping.converterId == -1 ) {
longVal = json_value.getLong();
}
else {
longVal = converters[ fieldMapping.converterId ].getLong( fieldMapping.fieldName, json_value );
}
if ( longVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, longVal );
break;
case JSONObjectMappingConstants.T_FLOAT:
if ( fieldMapping.converterId == -1 ) {
floatVal = json_value.getFloat();
}
else {
floatVal = converters[ fieldMapping.converterId ].getFloat( fieldMapping.fieldName, json_value );
}
if ( floatVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, floatVal );
break;
case JSONObjectMappingConstants.T_DOUBLE:
if ( fieldMapping.converterId == -1 ) {
doubleVal = json_value.getDouble();
}
else {
doubleVal = converters[ fieldMapping.converterId ].getDouble( fieldMapping.fieldName, json_value );
}
if ( doubleVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, doubleVal );
break;
case JSONObjectMappingConstants.T_BIGINTEGER:
if ( fieldMapping.converterId == -1 ) {
bigIntegerVal = json_value.getBigInteger();
}
else {
bigIntegerVal = converters[ fieldMapping.converterId ].getBigInteger( fieldMapping.fieldName, json_value );
}
if ( bigIntegerVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, bigIntegerVal );
break;
case JSONObjectMappingConstants.T_BIGDECIMAL:
if ( fieldMapping.converterId == -1 ) {
bigDecimalVal = json_value.getBigDecimal();
}
else {
bigDecimalVal = converters[ fieldMapping.converterId ].getBigDecimal( fieldMapping.fieldName, json_value );
}
if ( bigDecimalVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, bigDecimalVal );
break;
case JSONObjectMappingConstants.T_STRING:
if ( fieldMapping.converterId == -1 ) {
stringVal = json_value.getString();
}
else {
stringVal = converters[ fieldMapping.converterId ].getString( fieldMapping.fieldName, json_value );
}
if ( stringVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, stringVal );
break;
case JSONObjectMappingConstants.T_BYTEARRAY:
if ( fieldMapping.converterId == -1 ) {
byteArray = json_value.getBytes();
}
else {
byteArray = converters[ fieldMapping.converterId ].getBytes( fieldMapping.fieldName, json_value );
}
if ( byteArray == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( dstObj, byteArray );
break;
case JSONObjectMappingConstants.T_OBJECT:
json_object = json_value.getObject();
if ( json_object != null ) {
object = toObject( json_object, fieldMapping.clazz, converters );
}
else if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
else {
object = null;
}
fieldMapping.field.set( dstObj, object );
break;
case JSONObjectMappingConstants.T_ARRAY:
json_array = json_value.getArray();
if ( json_array != null ) {
switch ( fieldMapping.arrayType ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
json_values = json_array.values;
arrayOf_boolean = new boolean[ json_values.size() ];
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