/* * $Id: JSONObject.java,v 1.1 2006/04/15 14:10:48 platform Exp $ * Created on 2006-4-10 */ package org.json.simple; import java.io.IOException; 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 FangYidong<fangyidong@yahoo.com.cn> */ public class JSONObject extends HashMap implements Map, JSONAware, JSONStreamAware{ private static final long serialVersionUID = -503443796854799292L; /** * 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.json.simple.JSONValue#writeJSONString(Object, Writer) * * @param map * @param out */ 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.json.simple.JSONValue#toJSONString(Object) * * @param map * @return JSON text, or "null" if map is null. */ public static String toJSONString(Map map){ if(map == null) return "null"; StringBuffer sb = new StringBuffer(); boolean first = true; Iterator iter=map.entrySet().iterator(); sb.append('{'); while(iter.hasNext()){ if(first) first = false; else sb.append(','); Map.Entry entry=(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.json.simple.JSONValue#escape(String) * * @param s * @return */ public static String escape(String s){ return JSONValue.escape(s); } }