org.jose4j.json.internal.json_simple.JSONObject Maven / Gradle / Ivy
/*
* $Id: JSONObject.java,v 1.1 2006/04/15 14:10:48 platform Exp $
* Created on 2006-4-10
*/
package org.jose4j.json.internal.json_simple;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* A JSON object. Key value pairs are unordered. JSONObject supports java.util.Map interface.
*
* @author (originally) FangYidong [email protected]
*/
public class JSONObject extends HashMap implements 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 Map
*/
public JSONObject(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.jose4j.json.internal.json_simple.JSONValue#writeJSONString(Object, Writer)
*
* @param map Map
* @param out Writer
* @throws IOException IOException
*/
public static void writeJSONString(Map map, Writer out) throws IOException {
if(map == null){
out.write("null");
return;
}
boolean first = true;
Iterator iter=map.entrySet().iterator();
out.write('{');
while(iter.hasNext()){
if(first)
first = false;
else
out.write(',');
Map.Entry entry=(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(Writer out) throws 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.jose4j.json.internal.json_simple.JSONValue#toJSONString(Object)
*
* @param map Map
* @return JSON text, or "null" if map is null.
*/
public static String toJSONString(Map map){
final StringWriter writer = new StringWriter();
try {
writeJSONString(map, writer);
return writer.toString();
} catch (IOException e) {
// This should never happen with a StringWriter
throw new RuntimeException(e);
}
}
public String toJSONString(){
return toJSONString(this);
}
public String toString(){
return toJSONString();
}
public static String toString(String key,Object value){
StringBuilder sb = new StringBuilder();
sb.append('\"');
if(key == null)
sb.append("null");
else
JSONValue.escape(key, sb);
sb.append('\"').append(':');
sb.append(JSONValue.toJSONString(value));
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.jose4j.json.internal.json_simple.JSONValue#escape(String)
*
* @param s String
* @return string
*/
public static String escape(String s){
return JSONValue.escape(s);
}
}