JSONObject.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>JSONObject</i> is an Adaptation of the JSONObject 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
*/
@SuppressWarnings ("rawtypes") public class JSONObject extends java.util.HashMap implements java.util.Map, JSONAware, JSONStreamAware{
private static final long serialVersionUID = -503443796854799292L;
public JSONObject() {
super();
}
/**
* Allows creation of a JSONObject from a Map. After that, both the
* generated JSONObject and the Map can be modified independently.
*
* @param map Input JSON Map
*/
@SuppressWarnings ("unchecked") public JSONObject(java.util.Map map) {
super(map);
}
/**
* Encode a map into JSON text and write it to out.
* If this map is also a JSONAware or JSONStreamAware, JSONAware or JSONStreamAware specific behaviours will be ignored at this top level.
*
* @see org.drip.json.simple.JSONValue#writeJSONString(Object, Writer)
*
* @param map Input Map
* @param out Output Writer
*
* @throws java.io.IOException Thrown if the Inputs are Invalid
*/
public static void writeJSONString(java.util.Map map, java.io.Writer out) throws java.io.IOException {
if(map == null){
out.write("null");
return;
}
boolean first = true;
java.util.Iterator iter=map.entrySet().iterator();
out.write('{');
while(iter.hasNext()){
if(first)
first = false;
else
out.write(',');
java.util.Map.Entry entry=(java.util.Map.Entry)iter.next();
out.write('\"');
out.write(escape(String.valueOf(entry.getKey())));
out.write('\"');
out.write(':');
JSONValue.writeJSONString(entry.getValue(), out);
}
out.write('}');
}
public void writeJSONString(java.io.Writer out) throws java.io.IOException{
writeJSONString(this, out);
}
/**
* Convert a map to JSON text. The result is a JSON object.
* If this map is also a JSONAware, JSONAware specific behaviours will be omitted at this top level.
*
* @see org.drip.json.simple.JSONValue#toJSONString(Object)
*
* @param map The JSON Map
*
* @return JSON text, or "null" if map is null.
*/
public static String toJSONString(java.util.Map map){
if(map == null)
return "null";
StringBuffer sb = new StringBuffer();
boolean first = true;
java.util.Iterator iter=map.entrySet().iterator();
sb.append('{');
while(iter.hasNext()){
if(first)
first = false;
else
sb.append(',');
java.util.Map.Entry entry=(java.util.Map.Entry)iter.next();
toJSONString(String.valueOf(entry.getKey()),entry.getValue(), sb);
}
sb.append('}');
return sb.toString();
}
public String toJSONString(){
return toJSONString(this);
}
private static String toJSONString(String key,Object value, StringBuffer sb){
sb.append('\"');
if(key == null)
sb.append("null");
else
JSONValue.escape(key, sb);
sb.append('\"').append(':');
sb.append(JSONValue.toJSONString(value));
return sb.toString();
}
public String toString(){
return toJSONString();
}
public static String toString(String key,Object value){
StringBuffer sb = new StringBuffer();
toJSONString(key, value, sb);
return sb.toString();
}
/**
* Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
* It's the same as JSONValue.escape() only for compatibility here.
*
* @see org.drip.json.simple.JSONValue#escape(String)
*
* @param s The Input String
* @return Escaped String
*/
public static String escape(String s){
return JSONValue.escape(s);
}
}