/*
* Copyright (C) 2000 - 2013 TagServlet Ltd
*
* This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
*
* OpenBD is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* Free Software Foundation,version 3.
*
* OpenBD is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenBD. If not, see http://www.gnu.org/licenses/
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining
* it with any of the JARS listed in the README.txt (or a modified version of
* (that library), containing parts covered by the terms of that JAR, the
* licensors of this Program grant you additional permission to convey the
* resulting work.
* README.txt @ http://www.openbluedragon.org/license/README.txt
*
* http://openbd.org/
*
* $Id: DeserializeJSONJackson.java 2496 2015-02-01 02:19:29Z alan $
*/
package com.naryx.tagfusion.expression.function.string;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonParser.Feature;
import com.fasterxml.jackson.core.JsonParser.NumberType;
import com.fasterxml.jackson.core.JsonToken;
import com.naryx.tagfusion.cfm.engine.cfArgStructData;
import com.naryx.tagfusion.cfm.engine.cfArrayData;
import com.naryx.tagfusion.cfm.engine.cfBooleanData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfDateData;
import com.naryx.tagfusion.cfm.engine.cfNullData;
import com.naryx.tagfusion.cfm.engine.cfNumberData;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStringData;
import com.naryx.tagfusion.cfm.engine.cfStructData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.file.vfs.cfVFSData;
import com.naryx.tagfusion.expression.function.ParseDateTime;
import com.naryx.tagfusion.expression.function.functionBase;
/*
* Takes in a JSON String and converts it to a cfData
*
*/
public class DeserializeJSONJackson extends functionBase {
private static final long serialVersionUID = 1L;
public DeserializeJSONJackson() {
min = 1;
max = 3;
setNamedParams( new String[]{ "jsonstring", "strictmapping", "file" } );
}
public String[] getParamInfo(){
return new String[]{
"JSON string. Cannot be used at the same time as file",
"Flag to determine if CFML Query objects should be recognized and converted to a Query object; defaults to true",
"path to the file to read instead of using the parameter 'jsonstring'; can be any handle to a virtual file system"
};
}
public java.util.Map getInfo(){
return makeInfo(
"conversion",
"Decodes the given JSON string into a CFML object",
ReturnType.OBJECT );
}
public cfData execute(cfSession _session, cfArgStructData argStruct ) throws cfmRunTimeException {
JsonFactory f = new JsonFactory();
f.configure(Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true);
f.configure(Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
f.configure(Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true );
cfVFSData fileObj = null;
JsonParser jp;
try {
String file = getNamedStringParam( argStruct, "file", null );
if ( file != null ){
fileObj = new cfVFSData( file, "read", null );
jp = f.createParser(fileObj.getReader());
}else{
String jsonString = getNamedStringParam( argStruct, "jsonstring","");
if ( jsonString.isEmpty() )
return cfStringData.EMPTY_STRING;
jp = f.createParser(jsonString);
}
boolean bStrictMapping = getNamedBooleanParam( argStruct, "strictmapping", true ) ;
cfData obj = cfBooleanData.TRUE;
JsonToken token = jp.nextToken();
if ( token == JsonToken.START_OBJECT ){
obj = parseObject( jp, new cfStructData(), bStrictMapping );
}else if ( token == JsonToken.START_ARRAY ){
obj = parseArray( jp, cfArrayData.createArray(1), bStrictMapping );
}else if ( token == JsonToken.VALUE_NUMBER_INT ){
if ( jp.getNumberType() == NumberType.INT )
obj = new cfNumberData(jp.getIntValue());
else if ( jp.getNumberType() == NumberType.LONG || jp.getNumberType() == NumberType.BIG_INTEGER )
obj = new cfNumberData(jp.getLongValue());
}else if ( token == JsonToken.VALUE_NUMBER_FLOAT ){
if ( jp.getNumberType() == NumberType.FLOAT )
obj = new cfNumberData(jp.getFloatValue());
else if ( jp.getNumberType() == NumberType.DOUBLE )
obj = new cfNumberData(jp.getDoubleValue());
} else if ( token == JsonToken.VALUE_FALSE ){
obj = cfBooleanData.FALSE;
} else if ( token == JsonToken.VALUE_TRUE ){
obj = cfBooleanData.TRUE;
} else if ( token == JsonToken.VALUE_NULL ){
obj = cfNullData.NULL;
}else{
obj = getString(jp.getText());
}
return obj;
} catch (JsonParseException e) {
throwException(_session, "[Invalid JSON] Line=" + e.getLocation().getLineNr() + "; Column=" + e.getLocation().getColumnNr() + "; Offset=" + e.getLocation().getCharOffset() );
} catch (Exception e) {
throwException(_session, e.getMessage() );
} finally {
if ( fileObj != null )
try {
fileObj.close();
} catch (Exception e) {}
}
return null;
}
/**
* Determines if this is a query object, if so, converts it to a query one
*
* Always has a data/columns with an optional rowcount to flag a different setup
*
* @param obj
* @return
* @throws cfmRunTimeException
*/
private cfData convertToQuery(cfStructData obj) throws cfmRunTimeException {
if ( obj.containsKey("columns") && obj.containsKey("data" ) ){
cfData columns = obj.getData("columns");
if ( columns.getDataType() != cfData.CFARRAYDATA ) // columns is always an array
return obj;
cfData data = obj.getData("data");
if ( obj.containsKey("rowcount") ){
if ( data.getDataType() != cfData.CFSTRUCTDATA )
return obj;
else
return new cfQueryDataFromJSon( (cfArrayData)columns, (cfStructData)data, obj.getData("rowcount").getInt() );
}else{
if ( data.getDataType() != cfData.CFARRAYDATA )
return obj;
else
return new cfQueryDataFromJSon( (cfArrayData)columns, (cfArrayData)data );
}
}else
return obj;
}
private cfData parseObject(JsonParser jp, cfStructData struct, boolean bStrictMapping ) throws JsonParseException, IOException, cfmRunTimeException{
JsonToken token = jp.nextToken();
while ( token != JsonToken.END_OBJECT ){
String namefield = jp.getCurrentName();
if ( token == JsonToken.START_ARRAY ){
struct.setData( namefield, parseArray(jp, cfArrayData.createArray(1), bStrictMapping) );
}else if ( token == JsonToken.START_OBJECT ){
struct.setData( namefield, parseObject(jp,new cfStructData(), bStrictMapping) );
}else if ( token == JsonToken.VALUE_NUMBER_INT ){
if ( jp.getNumberType() == NumberType.INT )
struct.setData( namefield, new cfNumberData(jp.getIntValue()) );
else if ( jp.getNumberType() == NumberType.LONG || jp.getNumberType() == NumberType.BIG_INTEGER )
struct.setData( namefield, new cfNumberData(jp.getLongValue()) );
}else if ( token == JsonToken.VALUE_NUMBER_FLOAT ){
if ( jp.getNumberType() == NumberType.FLOAT )
struct.setData( namefield, new cfNumberData(jp.getFloatValue()) );
else if ( jp.getNumberType() == NumberType.DOUBLE )
struct.setData( namefield, new cfNumberData(jp.getDoubleValue()) );
} else if ( token == JsonToken.VALUE_FALSE ){
struct.setData( namefield, cfBooleanData.FALSE );
} else if ( token == JsonToken.VALUE_TRUE ){
struct.setData( namefield, cfBooleanData.TRUE );
} else if ( token == JsonToken.VALUE_NULL ){
struct.setData( namefield, cfNullData.NULL );
}else{
struct.setData( namefield, getString(jp.getText()) );
}
token = jp.nextToken();
}
if ( bStrictMapping )
return convertToQuery( struct );
else
return struct;
}
private cfData parseArray(JsonParser jp, cfArrayData array, boolean bStrictMapping ) throws JsonParseException, IOException, cfmRunTimeException{
JsonToken token = jp.nextToken();
while ( token != JsonToken.END_ARRAY ){
if ( token == JsonToken.START_ARRAY ){
array.addElement( parseArray(jp,cfArrayData.createArray(1),bStrictMapping ) );
}else if ( token == JsonToken.START_OBJECT ){
array.addElement( parseObject(jp,new cfStructData(),bStrictMapping) );
}else if ( token == JsonToken.VALUE_NUMBER_INT ){
if ( jp.getNumberType() == NumberType.INT )
array.addElement( new cfNumberData(jp.getIntValue()) );
else if ( jp.getNumberType() == NumberType.LONG || jp.getNumberType() == NumberType.BIG_INTEGER )
array.addElement( new cfNumberData(jp.getLongValue()) );
}else if ( token == JsonToken.VALUE_NUMBER_FLOAT ){
if ( jp.getNumberType() == NumberType.FLOAT )
array.addElement( new cfNumberData(jp.getFloatValue()) );
else if ( jp.getNumberType() == NumberType.DOUBLE )
array.addElement( new cfNumberData(jp.getDoubleValue()) );
} else if ( token == JsonToken.VALUE_FALSE ){
array.addElement( cfBooleanData.FALSE );
} else if ( token == JsonToken.VALUE_TRUE ){
array.addElement( cfBooleanData.TRUE );
} else if ( token == JsonToken.VALUE_NULL ){
array.addElement( cfNullData.NULL );
}else
array.addElement( getString(jp.getText()) );
token = jp.nextToken();
}
return array;
}
/**
* Attempts to convert the date to a proper date string
* @param jsonText
* @return
*/
private cfData getString( String jsonText ){
if ( jsonText.startsWith("{ts") && jsonText.endsWith("}") ){
try{
return new cfDateData( ParseDateTime.parseDateString( jsonText ) );
}catch(Exception e){
return new cfStringData(jsonText);
}
}else{
return new cfStringData(jsonText);
}
}
}