org.jooq.tools.json.JSONArray 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.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* A JSON array. JSONObject supports java.util.List interface.
*
* @author FangYidong<[email protected]>
*/
@SuppressWarnings({ "serial", "rawtypes", "unchecked" })
public class JSONArray extends ArrayList {
/**
* Constructs an empty JSONArray.
*/
public JSONArray(){
super();
}
/**
* Constructs a JSONArray containing the elements of the specified
* collection, in the order they are returned by the collection's iterator.
*
* @param c the collection whose elements are to be placed into this JSONArray
*/
public JSONArray(Collection c){
super(c);
}
/**
* Encode a list into JSON text and write it to out.
*
* @see JSONValue#writeJSONString(Object, Writer)
*/
public static void writeJSONString(List list, Writer out) throws IOException {
if (list == null) {
out.write("null");
return;
}
boolean first = true;
Iterator iter = list.iterator();
out.write('[');
while (iter.hasNext()) {
if (first)
first = false;
else
out.write(',');
Object value = iter.next();
if (value == null) {
out.write("null");
continue;
}
JSONValue.writeJSONString(value, out);
}
out.write(']');
}
/**
* Convert a list to JSON text. The result is a JSON array.
*
* @see JSONValue#toJSONString(Object)
* @return JSON text, or "null" if list is null.
*/
public static String toJSONString(List list) {
if (list == null)
return "null";
boolean first = true;
StringBuffer sb = new StringBuffer();
Iterator iter = list.iterator();
sb.append('[');
while (iter.hasNext()) {
if (first)
first = false;
else
sb.append(',');
Object value = iter.next();
if (value == null) {
sb.append("null");
continue;
}
sb.append(JSONValue.toJSONString(value));
}
sb.append(']');
return sb.toString();
}
@Override
public String toString() {
return toJSONString(this);
}
}