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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.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.CharBuffer;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* De-serialize a JSON data stream into Java Object(s).
*
* @author Nicholas
* Created on 17/10/2013
*/
public class JSONStreamUnmarshaller {
private static final int S_START = 0;
private static final int S_OBJECT = 1;
private static final int S_OBJECT_NAME = 20;
private static final int S_OBJECT_COLON = 21;
private static final int S_OBJECT_VALUE = 23;
private static final int S_OBJECT_VALUE_NEXT = 24;
private static final int S_OBJECT_NAME_NEXT = 25;
private static final int S_ARRAY = 2;
private static final int S_ARRAY_VALUE = 3;
private static final int S_ARRAY_NEXT = 4;
private static final int S_VALUE_START = 5;
private static final int S_STRING = 6;
private static final int S_STRING_UNESCAPE = 7;
private static final int S_STRING_UNHEX = 8;
private static final int S_CONSTANT = 9;
private static final int S_NUMBER_MINUS = 10;
private static final int S_NUMBER_ZERO = 11;
private static final int S_NUMBER_INTEGER = 12;
private static final int S_NUMBER_DECIMAL = 13;
private static final int S_NUMBER_DECIMALS = 14;
private static final int S_NUMBER_E = 15;
private static final int S_NUMBER_EXPONENT = 16;
private static final int S_NUMBER_EXPONENTS = 17;
private static final int S_EOF = 18;
private static final int T_NULL = 1;
private static final int T_BOOLEAN = 2;
private static final int T_STRING = 3;
private static final int T_NUMBER = 4;
private static final int T_OBJECT = 5;
protected JSONObjectMappings objectMappings;
protected Map classMappings;
/** Temporary StringBuilder used to store JSON strings and values. */
protected StringBuilder sbStr = new StringBuilder();
private static final class StackEntry {
Object curObj;
Map fieldMappingsMap;
JSONObjectFieldMapping fieldMapping;
int rstate;
}
public JSONStreamUnmarshaller(JSONObjectMappings objectMappings) {
this.objectMappings = objectMappings;
this.classMappings = objectMappings.classMappings;
}
public T toObject(InputStream in, JSONDecoder decoder, Class clazz) throws IOException, JSONException {
return toObject( in, decoder, clazz, null );
}
public T toObject(InputStream in, JSONDecoder decoder, Class clazz, JSONConverterAbstract[] converters) throws IOException, JSONException {
Boolean booleanVal = null;
Integer intVal = null;
Long longVal = null;
Float floatVal = null;
Double doubleVal = null;
BigInteger bigIntegerVal = null;
BigDecimal bigDecimalVal = null;
String stringVal = null;
byte[] byteArray = null;
Object object = null;
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!" );
}
T rootObj = null;
LinkedList stack = new LinkedList();
StackEntry stackEntry = null;
char[] charArray = new char[ 1024 ];
CharBuffer charBuffer = CharBuffer.wrap( charArray );
decoder.init( in );
decoder.fill( charBuffer );
// Switch buffer to read mode.
charBuffer.flip();
int pos = charBuffer.position();
int limit = charBuffer.limit();
int hexValue = 0;
int hexCount = 0;
int i;
String constant;
int y = 1;
int x = 1;
int json_value_type = 0;
Object curObj = null;
Map fieldMappingsMap;
JSONObjectFieldMapping fieldMapping = null;
int state = S_START;
int rstate = -1;
boolean bLoop = true;
char c;
try {
rootObj = clazz.newInstance();
curObj = rootObj;
fieldMappingsMap = json_om.fieldMappingsMap;
while ( bLoop ) {
while ( pos < limit ) {
c = charArray[ pos ];
++x;
switch ( state ) {
case S_START:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case '{':
// TODO
//current = new JSONObject();
//stack.add( new StackEntry( current, json_name ) );
state = S_OBJECT;
break;
case '[':
// TODO
//current = new JSONArray();
//stack.add( new StackEntry( current, json_name ) );
state = S_ARRAY;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_OBJECT:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case '}':
/*
if ( stack.size() == 0 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
*/
stackEntry = stack.removeLast();
// TODO
//current = entry.json_structure;
//json_name = stackEntry.json_name;
//json_value = current;
if ( stack.size() > 0 ) {
//current = stack.getLast().json_structure;
/*
if (current.type == JSONConstants.VT_OBJECT) {
state = S_OBJECT_VALUE;
}
else {
state = S_ARRAY_VALUE;
}
*/
}
else {
state = S_EOF;
}
break;
case '"':
sbStr.setLength( 0 );
state = S_STRING;
rstate = S_OBJECT_NAME;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_OBJECT_NAME:
fieldMapping = fieldMappingsMap.get( stringVal );
state = S_OBJECT_COLON;
// debug
//System.out.println( stringVal );
case S_OBJECT_COLON:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case ':':
state = S_VALUE_START;
rstate = S_OBJECT_VALUE;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_OBJECT_VALUE:
switch ( json_value_type ) {
case T_NULL:
if ( !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "'/'" + fieldMapping.jsonName + "' is not nullable." );
}
break;
case T_BOOLEAN:
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
if ( fieldMapping.converterId != -1 ) {
// TODO
//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( curObj, booleanVal );
break;
case JSONObjectMappingConstants.T_BOOLEAN:
if ( fieldMapping.converterId != -1 ) {
// TODO
//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( curObj, booleanVal );
break;
default:
throw new JSONException( "Wrong type." );
}
break;
case T_STRING:
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_STRING:
if ( fieldMapping.converterId != -1 ) {
// TODO
//strVal = converters[ fieldMapping.converterId ].getString( fieldMapping.fieldName, json_string );
}
if ( stringVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( curObj, stringVal );
break;
case JSONObjectMappingConstants.T_BYTEARRAY:
if ( fieldMapping.converterId == -1 ) {
byteArray = stringVal.getBytes();
}
else {
// TODO
//byteArray = converters[ fieldMapping.converterId ].getBytes( fieldMapping.fieldName, json_string );
}
if ( byteArray == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( curObj, byteArray );
break;
default:
throw new JSONException( "Wrong type." );
}
break;
case T_OBJECT:
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_OBJECT:
if ( object != null ) {
// TODO
//object = toObject( object, fieldMapping.clazz, converters );
}
if ( object == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( curObj, object );
break;
default:
throw new JSONException( "Wrong type." );
}
break;
case T_NUMBER:
switch ( fieldMapping.type ) {
case JSONObjectMappingConstants.T_PRIMITIVE_BOOLEAN:
if ( "1".equals( stringVal ) ) {
booleanVal = true;
}
else if ( "0".equals( stringVal ) ) {
booleanVal = false;
}
else {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is a boolean and can not be '" + stringVal + "'." );
}
if ( fieldMapping.converterId != -1 ) {
// TODO
//booleanVal = converters[ fieldMapping.converterId ].getBoolean( fieldMapping.fieldName, json_value );
booleanVal = null;
}
if ( booleanVal == null ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is primitive and can not be null." );
}
fieldMapping.field.setBoolean( curObj, booleanVal );
break;
case JSONObjectMappingConstants.T_BOOLEAN:
if ( "1".equals( stringVal ) ) {
booleanVal = true;
}
else if ( "0".equals( stringVal ) ) {
booleanVal = false;
}
else {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is a boolean and can not be '" + stringVal + "'." );
}
if ( fieldMapping.converterId != -1 ) {
// TODO
//booleanVal = converters[ fieldMapping.converterId ].getBoolean( fieldMapping.fieldName, json_value );
booleanVal = null;
}
if ( booleanVal == null && !fieldMapping.nullable ) {
throw new JSONException( "Field '" + fieldMapping.fieldName + "' is not nullable." );
}
fieldMapping.field.set( curObj, booleanVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_INTEGER:
if ( fieldMapping.converterId == -1 ) {
intVal = Integer.parseInt( stringVal );
}
else {
// TODO
//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( curObj, intVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_LONG:
if ( fieldMapping.converterId == -1 ) {
longVal = Long.parseLong( stringVal );
}
else {
// TODO
//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( curObj, longVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_FLOAT:
if ( fieldMapping.converterId == -1 ) {
floatVal = Float.parseFloat( stringVal );
}
else {
// TODO
//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( curObj, floatVal );
break;
case JSONObjectMappingConstants.T_PRIMITIVE_DOUBLE:
if ( fieldMapping.converterId == -1 ) {
doubleVal = Double.parseDouble( stringVal );
}
else {
// TODO
//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( curObj, doubleVal );
break;
case JSONObjectMappingConstants.T_INTEGER:
if ( fieldMapping.converterId == -1 ) {
intVal = Integer.parseInt( stringVal );
}
else {
// TODO
//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( curObj, intVal );
break;
case JSONObjectMappingConstants.T_LONG:
if ( fieldMapping.converterId == -1 ) {
longVal = Long.parseLong( stringVal );
}
else {
// TODO
//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( curObj, longVal );
break;
case JSONObjectMappingConstants.T_FLOAT:
if ( fieldMapping.converterId == -1 ) {
floatVal = Float.parseFloat( stringVal );
}
else {
// TODO
//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( curObj, floatVal );
break;
case JSONObjectMappingConstants.T_DOUBLE:
if ( fieldMapping.converterId == -1 ) {
doubleVal = Double.parseDouble( stringVal );
}
else {
// TODO
//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( curObj, doubleVal );
break;
case JSONObjectMappingConstants.T_BIGINTEGER:
if ( fieldMapping.converterId == -1 ) {
bigIntegerVal = new BigInteger( stringVal );
}
else {
// TODO
//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( curObj, bigIntegerVal );
break;
case JSONObjectMappingConstants.T_BIGDECIMAL:
if ( fieldMapping.converterId == -1 ) {
bigDecimalVal = new BigDecimal( stringVal );
}
else {
// TODO
//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( curObj, bigDecimalVal );
break;
default:
throw new JSONException( "Wrong type." );
}
break;
default:
throw new IllegalStateException( "Unknown json value type: " + json_value_type );
}
// TODO
//current.put( json_name, json_value );
state = S_OBJECT_VALUE_NEXT;
// debug
//System.out.println( json_value.toString() );
case S_OBJECT_VALUE_NEXT:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case '}':
/*
if ( stack.size() == 0 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
*/
if ( stack.size() > 0 ) {
json_value_type = T_OBJECT;
object = curObj;
// TODO
stackEntry = stack.removeLast();
curObj = stackEntry.curObj;
fieldMappingsMap = stackEntry.fieldMappingsMap;
fieldMapping = stackEntry.fieldMapping;
state = stackEntry.rstate;
/*
if (current.type == JSONConstants.VT_OBJECT) {
state = S_OBJECT_VALUE;
}
else {
state = S_ARRAY_VALUE;
}
*/
}
else {
state = S_EOF;
}
break;
case ',':
state = S_OBJECT_NAME_NEXT;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_OBJECT_NAME_NEXT:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case '"':
sbStr.setLength( 0 );
state = S_STRING;
rstate = S_OBJECT_NAME;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_ARRAY:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case ']':
/*
if ( stack.size() == 0 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
*/
stackEntry = stack.removeLast();
// TODO
//current = entry.json_structure;
//json_name = stackEntry.json_name;
//json_value = current;
if ( stack.size() > 0 ) {
//current = stack.getLast().json_structure;
/*
if (current.type == JSONConstants.VT_OBJECT) {
state = S_OBJECT_VALUE;
}
else {
state = S_ARRAY_VALUE;
}
*/
}
else {
state = S_EOF;
}
break;
case '{':
// TODO
//current = new JSONObject();
//stack.add( new StackEntry( current, json_name ) );
state = S_OBJECT;
break;
case '[':
// TODO
//current = new JSONArray();
//stack.add( new StackEntry( current, json_name ) );
state = S_ARRAY;
break;
case '"':
sbStr.setLength( 0 );
state = S_STRING;
rstate = S_ARRAY_VALUE;
break;
case 'f':
case 'n':
case 't':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_CONSTANT;
rstate = S_ARRAY_VALUE;
break;
case '-':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_MINUS;
rstate = S_ARRAY_VALUE;
break;
case '0':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_ZERO;
rstate = S_ARRAY_VALUE;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_INTEGER;
rstate = S_ARRAY_VALUE;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_ARRAY_VALUE:
// TODO
//current.add( json_value );
state = S_ARRAY_NEXT;
// debug
//System.out.println( json_value.toString() );
case S_ARRAY_NEXT:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case ']':
/*
if ( stack.size() == 0 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
*/
stackEntry = stack.removeLast();
// TODO
//current = entry.json_structure;
//json_name = stackEntry.json_name;
//json_value = current;
if ( stack.size() > 0 ) {
//current = stack.getLast().json_structure;
/*
if (current.type == JSONConstants.VT_OBJECT) {
state = S_OBJECT_VALUE;
}
else {
state = S_ARRAY_VALUE;
}
*/
}
else {
state = S_EOF;
}
break;
case ',':
state = S_VALUE_START;
rstate = S_ARRAY_VALUE;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_VALUE_START:
// rstate should be set prior to this state.
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
case '{':
// TODO
stackEntry = new StackEntry();
stackEntry.curObj = curObj;
stackEntry.fieldMappingsMap = fieldMappingsMap;
stackEntry.fieldMapping = fieldMapping;
stackEntry.rstate = rstate;
stack.add( stackEntry );
curObj = fieldMapping.clazz.newInstance();
json_om = classMappings.get( fieldMapping.clazz.getName() );
if ( json_om == null ) {
throw new IllegalArgumentException( "Class '" + fieldMapping.clazz.getName() + "' not registered." );
}
if ( json_om.converters == true && converters == null ) {
throw new JSONException( "Class '" + fieldMapping.clazz.getName() + "' may required converters!" );
}
fieldMappingsMap = json_om.fieldMappingsMap;
state = S_OBJECT;
break;
case '[':
// TODO
//current = new JSONArray();
//stack.add( new StackEntry( current, json_name ) );
state = S_ARRAY;
break;
case '"':
sbStr.setLength( 0 );
state = S_STRING;
break;
case 'f':
case 'n':
case 't':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_CONSTANT;
break;
case '-':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_MINUS;
break;
case '0':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_ZERO;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.setLength( 0 );
sbStr.append( c );
state = S_NUMBER_INTEGER;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_STRING:
switch ( c ) {
case '"':
json_value_type = T_STRING;
stringVal = sbStr.toString();
state = rstate;
break;
case '\\':
state = S_STRING_UNESCAPE;
break;
default:
if ( c < 32 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
sbStr.append( c );
break;
}
++pos;
break;
case S_STRING_UNESCAPE:
switch ( c ) {
case '"':
sbStr.append( '"');
state = S_STRING;
break;
case '/':
sbStr.append( '/' );
state = S_STRING;
break;
case '\\':
sbStr.append( '\\' );
state = S_STRING;
break;
case 'b':
sbStr.append( (char)0x08 );
state = S_STRING;
break;
case 't':
sbStr.append( (char)0x09 );
state = S_STRING;
break;
case 'n':
sbStr.append( (char)0x0A );
state = S_STRING;
break;
case 'f':
sbStr.append( (char)0x0C );
state = S_STRING;
break;
case 'r':
sbStr.append( (char)0x0D );
state = S_STRING;
break;
case 'u':
hexValue = 0;
hexCount = 4;
state = S_STRING_UNHEX;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_STRING_UNHEX:
if ( c > 255 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
i = asciiHexTab[ c ];
if ( i == -1 ) {
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
hexValue <<= 4;
hexValue |= i;
--hexCount;
if (hexCount == 0) {
sbStr.append( (char)hexValue );
state = S_STRING;
}
++pos;
break;
case S_CONSTANT:
switch ( c ) {
case 'a':
case 'l':
case 's':
case 'e':
case 'r':
case 'u':
sbStr.append( c );
++pos;
break;
default:
constant = sbStr.toString();
if ( "false".equals( constant ) ) {
json_value_type = T_BOOLEAN;
booleanVal = false;
}
else if ( "true".equals( constant ) ) {
json_value_type = T_BOOLEAN;
booleanVal = true;
}
else if ( "null".equals( constant ) ) {
json_value_type = T_NULL;
}
else {
throw new JSONException( "Invalid JSON constant: '" + constant + "' at (" + y + ":" + x + ")!" );
}
state = rstate;
break;
}
break;
case S_NUMBER_MINUS:
switch ( c ) {
case '0':
sbStr.append( c );
state = S_NUMBER_ZERO;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
state = S_NUMBER_INTEGER;
break;
default:
throw new JSONException( "Invalid JSON number structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_NUMBER_INTEGER:
switch ( c ) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
++pos;
break;
case '.':
sbStr.append( c );
state = S_NUMBER_DECIMAL;
++pos;
break;
case 'e':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
case 'E':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
default:
json_value_type = T_NUMBER;
stringVal = sbStr.toString();
state = rstate;
break;
}
break;
case S_NUMBER_ZERO:
switch ( c ) {
case '.':
sbStr.append( c );
state = S_NUMBER_DECIMAL;
++pos;
break;
case 'e':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
case 'E':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
default:
json_value_type = T_NUMBER;
stringVal = sbStr.toString();
state = rstate;
break;
}
break;
case S_NUMBER_DECIMAL:
switch ( c ) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
state = S_NUMBER_DECIMALS;
++pos;
break;
default:
throw new JSONException( "Invalid JSON number structure at (" + y + ":" + x + ")!" );
}
break;
case S_NUMBER_DECIMALS:
switch ( c ) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
++pos;
break;
case 'e':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
case 'E':
sbStr.append( c );
state = S_NUMBER_E;
++pos;
break;
default:
json_value_type = T_NUMBER;
stringVal = sbStr.toString();
state = rstate;
}
break;
case S_NUMBER_E:
switch ( c ) {
case '+':
sbStr.append( c );
state = S_NUMBER_EXPONENT;
break;
case '-':
sbStr.append( c );
state = S_NUMBER_EXPONENT;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
state = S_NUMBER_EXPONENTS;
break;
default:
throw new JSONException( "Invalid JSON number structure at (" + y + ":" + x + ")!" );
}
++pos;
break;
case S_NUMBER_EXPONENT:
switch ( c ) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
state = S_NUMBER_EXPONENTS;
++pos;
break;
default:
throw new JSONException( "Invalid JSON number structure at (" + y + ":" + x + ")!" );
}
break;
case S_NUMBER_EXPONENTS:
switch ( c ) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
sbStr.append( c );
++pos;
break;
default:
json_value_type = T_NUMBER;
stringVal = sbStr.toString();
state = rstate;
}
break;
case S_EOF:
switch ( c ) {
case 0x20:
case 0x09:
case 0x0D:
// Whitespace.
break;
case 0x0A:
++y;
x = 1;
break;
default:
throw new JSONException( "Invalid JSON structure at (" + y + ":" + x + ")!" );
}
++pos;
}
}
// Switch buffer to write mode.
charBuffer.clear();
decoder.fill( charBuffer );
// Switch buffer to read mode.
charBuffer.flip();
pos = charBuffer.position();
limit = charBuffer.limit();
bLoop = !(pos == limit);
}
}
catch (InstantiationException e) {
throw new JSONException( e );
}
catch (IllegalAccessException e) {
throw new JSONException( e );
}
if (curObj == null || stack.size() > 0) {
throw new JSONException( "Invalid JSON structure!" );
}
return rootObj;
}
/** Integer to hex char conversion table. */
//private static char[] hexTab = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
/** Hex char to integer conversion table. */
private static int[] asciiHexTab = new int[256];
/*
* Initialize ASCII hex table.
*/
static {
String hex = "0123456789abcdef";
for (int i=0; i © 2015 - 2025 Weber Informatics LLC | Privacy Policy