org.jooq.tools.json.JSONObject Maven / Gradle / Ivy
/*
* Copyright (c) 2013 by Yidong Fang
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* https://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.
*/
package org.jooq.tools.json;
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<[email protected]>
*/
@SuppressWarnings({ "serial", "rawtypes", "unchecked" })
public class JSONObject extends HashMap{
public JSONObject() {
super();
}
public JSONObject(Map map) {
super(map);
}
/**
* Encode a map into JSON text and write it to out.
*
* @see JSONValue#writeJSONString(Object, Writer)
*/
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('}');
}
/**
* Convert a map to JSON text. The result is a JSON object.
*
* @see JSONValue#toJSONString(Object)
* @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();
}
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 static String toString(String key, Object value) {
StringBuffer sb = new StringBuffer();
toJSONString(key, value, sb);
return sb.toString();
}
@Override public String toString() {
return toJSONString(this);
}
/**
* 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 JSONValue#escape(String)
*/
public static String escape(String s) {
return JSONValue.escape(s);
}
}