JSONValue.java
package org.drip.json.simple;
/*
* -*- mode: java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*/
/*!
* Copyright (C) 2020 Lakshmi Krishnamurthy
* Copyright (C) 2019 Lakshmi Krishnamurthy
* Copyright (C) 2018 Lakshmi Krishnamurthy
* Copyright (C) 2017 Lakshmi Krishnamurthy
* Copyright (C) 2016 Lakshmi Krishnamurthy
* Copyright (C) 2015 Lakshmi Krishnamurthy
*
* This file is part of DROP, an open-source library targeting analytics/risk, transaction cost analytics,
* asset liability management analytics, capital, exposure, and margin analytics, valuation adjustment
* analytics, and portfolio construction analytics within and across fixed income, credit, commodity,
* equity, FX, and structured products. It also includes auxiliary libraries for algorithm support,
* numerical analysis, numerical optimization, spline builder, model validation, statistical learning,
* and computational support.
*
* https://lakshmidrip.github.io/DROP/
*
* DROP is composed of three modules:
*
* - DROP Product Core - https://lakshmidrip.github.io/DROP-Product-Core/
* - DROP Portfolio Core - https://lakshmidrip.github.io/DROP-Portfolio-Core/
* - DROP Computational Core - https://lakshmidrip.github.io/DROP-Computational-Core/
*
* DROP Product Core implements libraries for the following:
* - Fixed Income Analytics
* - Loan Analytics
* - Transaction Cost Analytics
*
* DROP Portfolio Core implements libraries for the following:
* - Asset Allocation Analytics
* - Asset Liability Management Analytics
* - Capital Estimation Analytics
* - Exposure Analytics
* - Margin Analytics
* - XVA Analytics
*
* DROP Computational Core implements libraries for the following:
* - Algorithm Support
* - Computation Support
* - Function Analysis
* - Model Validation
* - Numerical Analysis
* - Numerical Optimizer
* - Spline Builder
* - Statistical Learning
*
* Documentation for DROP is Spread Over:
*
* - Main => https://lakshmidrip.github.io/DROP/
* - Wiki => https://github.com/lakshmiDRIP/DROP/wiki
* - GitHub => https://github.com/lakshmiDRIP/DROP
* - Repo Layout Taxonomy => https://github.com/lakshmiDRIP/DROP/blob/master/Taxonomy.md
* - Javadoc => https://lakshmidrip.github.io/DROP/Javadoc/index.html
* - Technical Specifications => https://github.com/lakshmiDRIP/DROP/tree/master/Docs/Internal
* - Release Versions => https://lakshmidrip.github.io/DROP/version.html
* - Community Credits => https://lakshmidrip.github.io/DROP/credits.html
* - Issues Catalog => https://github.com/lakshmiDRIP/DROP/issues
* - JUnit => https://lakshmidrip.github.io/DROP/junit/index.html
* - Jacoco => https://lakshmidrip.github.io/DROP/jacoco/index.html
*
* 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.
*/
/**
* <i>JSONValue</i> is an Adaptation of the JSONValue Class from the RFC4627 compliant JSON Simple
* (https://code.google.com/p/json-simple/).
*
* <br><br>
* <ul>
* <li><b>Module </b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/ComputationalCore.md">Computational Core Module</a></li>
* <li><b>Library</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/ComputationSupportLibrary.md">Computation Support</a></li>
* <li><b>Project</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/json">RFC-4627 Compliant JSON Encoder/Decoder (Parser)</a></li>
* <li><b>Package</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/json/simple">RFC4627 Compliant JSON Message Object</a></li>
* </ul>
*
* @author Fang Yidong
* @author Lakshmi Krishnamurthy
*/
public class JSONValue {
/**
* Parse JSON text into java object from the input source.
* Please use parseWithException() if you don't want to ignore the exception.
*
* @see org.drip.json.parser.JSONParser#parse(Reader)
* @see #parseWithException(Reader)
*
* @param in Input Reader
*
* @return Instance of the following:
* org.drip.json.simple.JSONObject,
* org.drip.json.simple.JSONArray,
* java.lang.String,
* java.lang.Number,
* java.lang.Boolean,
* null
*
*/
public static Object parse(java.io.Reader in){
try{
org.drip.json.parser.JSONParser parser=new org.drip.json.parser.JSONParser();
return parser.parse(in);
}
catch(Exception e){
return null;
}
}
public static Object parse(String s){
java.io.StringReader in=new java.io.StringReader(s);
return parse(in);
}
/**
* Parse JSON text into java object from the input source.
*
* @see org.drip.json.parser.JSONParser
*
* @param in Input Reader
* @return Instance of the following:
* org.json.simple.JSONObject,
* org.json.simple.JSONArray,
* java.lang.String,
* java.lang.Number,
* java.lang.Boolean,
* null
*
* @throws java.io.IOException Thrown if the Inputs are Invalid
*
* @throws org.drip.json.parser.ParseException Thrown if the Inputs are Invalid
*/
public static Object parseWithException(java.io.Reader in) throws java.io.IOException, org.drip.json.parser.ParseException{
org.drip.json.parser.JSONParser parser=new org.drip.json.parser.JSONParser();
return parser.parse(in);
}
public static Object parseWithException(String s) throws org.drip.json.parser.ParseException{
org.drip.json.parser.JSONParser parser=new org.drip.json.parser.JSONParser();
return parser.parse(s);
}
/**
* Encode an object into JSON text and write it to out.
* <p>
* If this object is a Map or a List, and it's also a JSONStreamAware or a JSONAware, JSONStreamAware or JSONAware will be considered firstly.
* <p>
* DO NOT call this method from writeJSONString(Writer) of a class that implements both JSONStreamAware and (Map or List) with
* "this" as the first parameter, use JSONObject.writeJSONString(Map, Writer) or JSONArray.writeJSONString(List, Writer) instead.
*
* @see org.drip.json.simple.JSONObject#writeJSONString(Map, Writer)
* @see org.drip.json.simple.JSONArray#writeJSONString(List, Writer)
*
* @param value The JSON Object
* @param out The JSON Writer
*
* @throws java.io.IOException Thrown if the Inputs are Invalid
*/
@SuppressWarnings ("rawtypes") public static void writeJSONString(Object value, java.io.Writer out) throws java.io.IOException {
if(value == null){
out.write("null");
return;
}
if(value instanceof String){
out.write('\"');
out.write(escape((String)value));
out.write('\"');
return;
}
if(value instanceof Double){
if(((Double)value).isInfinite() || ((Double)value).isNaN())
out.write("null");
else
out.write(value.toString());
return;
}
if(value instanceof Float){
if(((Float)value).isInfinite() || ((Float)value).isNaN())
out.write("null");
else
out.write(value.toString());
return;
}
if(value instanceof Number){
out.write(value.toString());
return;
}
if(value instanceof Boolean){
out.write(value.toString());
return;
}
if((value instanceof JSONStreamAware)){
((JSONStreamAware)value).writeJSONString(out);
return;
}
if((value instanceof JSONAware)){
out.write(((JSONAware)value).toJSONString());
return;
}
if(value instanceof java.util.Map){
org.drip.json.simple.JSONObject.writeJSONString((java.util.Map)value, out);
return;
}
if(value instanceof java.util.List){
JSONArray.writeJSONString((java.util.List)value, out);
return;
}
out.write(value.toString());
}
/**
* Convert an object to JSON text.
* <p>
* If this object is a Map or a List, and it's also a JSONAware, JSONAware will be considered firstly.
* <p>
* DO NOT call this method from toJSONString() of a class that implements both JSONAware and Map or List with
* "this" as the parameter, use JSONObject.toJSONString(Map) or JSONArray.toJSONString(List) instead.
*
* @see org.drip.json.simple.JSONObject#toJSONString(Map)
* @see org.drip.json.simple.JSONArray#toJSONString(List)
*
* @param value The JSON Object
*
* @return JSON text, or "null" if value is null or it's an NaN or an INF number.
*/
@SuppressWarnings ("rawtypes") public static String toJSONString(Object value){
if(value == null)
return "null";
if(value instanceof String)
return "\""+escape((String)value)+"\"";
if(value instanceof Double){
if(((Double)value).isInfinite() || ((Double)value).isNaN())
return "null";
else
return value.toString();
}
if(value instanceof Float){
if(((Float)value).isInfinite() || ((Float)value).isNaN())
return "null";
else
return value.toString();
}
if(value instanceof Number)
return value.toString();
if(value instanceof Boolean)
return value.toString();
if((value instanceof JSONAware))
return ((JSONAware)value).toJSONString();
if(value instanceof java.util.Map)
return org.drip.json.simple.JSONObject.toJSONString((java.util.Map)value);
if(value instanceof java.util.List)
return org.drip.json.simple.JSONArray.toJSONString((java.util.List)value);
return value.toString();
}
/**
* Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
*
* @param s Pre-escape String
*
* @return The Escape String
*/
public static String escape(String s){
if(s==null)
return null;
StringBuffer sb = new StringBuffer();
escape(s, sb);
return sb.toString();
}
/**
* @param s - Must not be null.
* @param sb The StringBuffer
*/
static void escape(String s, StringBuffer sb) {
for(int i=0;i<s.length();i++){
char ch=s.charAt(i);
switch(ch){
case '"':
sb.append("\\\"");
break;
case '\\':
sb.append("\\\\");
break;
case '\b':
sb.append("\\b");
break;
case '\f':
sb.append("\\f");
break;
case '\n':
sb.append("\\n");
break;
case '\r':
sb.append("\\r");
break;
case '\t':
sb.append("\\t");
break;
case '/':
sb.append("\\/");
break;
default:
//Reference: http://www.unicode.org/versions/Unicode5.1.0/
if((ch>='\u0000' && ch<='\u001F') || (ch>='\u007F' && ch<='\u009F') || (ch>='\u2000' && ch<='\u20FF')){
String ss=Integer.toHexString(ch);
sb.append("\\u");
for(int k=0;k<4-ss.length();k++){
sb.append('0');
}
sb.append(ss.toUpperCase());
}
else{
sb.append(ch);
}
}
}//for
}
}