| package org.json; |
| |
| /* |
| Copyright (c) 2006 JSON.org |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), to deal |
| in the Software without restriction, including without limitation the rights |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| copies of the Software, and to permit persons to whom the Software is |
| furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included in all |
| copies or substantial portions of the Software. |
| |
| The Software shall be used for Good, not Evil. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| SOFTWARE. |
| */ |
| |
| import java.io.StringWriter; |
| |
| /** |
| * JSONStringer provides a quick and convenient way of producing JSON text. |
| * The texts produced strictly conform to JSON syntax rules. No whitespace is |
| * added, so the results are ready for transmission or storage. Each instance of |
| * JSONStringer can produce one JSON text. |
| * <p> |
| * A JSONStringer instance provides a <code>value</code> method for appending |
| * values to the |
| * text, and a <code>key</code> |
| * method for adding keys before values in objects. There are <code>array</code> |
| * and <code>endArray</code> methods that make and bound array values, and |
| * <code>object</code> and <code>endObject</code> methods which make and bound |
| * object values. All of these methods return the JSONWriter instance, |
| * permitting cascade style. For example, <pre> |
| * myString = new JSONStringer() |
| * .object() |
| * .key("JSON") |
| * .value("Hello, World!") |
| * .endObject() |
| * .toString();</pre> which produces the string <pre> |
| * {"JSON":"Hello, World!"}</pre> |
| * <p> |
| * The first method called must be <code>array</code> or <code>object</code>. |
| * There are no methods for adding commas or colons. JSONStringer adds them for |
| * you. Objects and arrays can be nested up to 20 levels deep. |
| * <p> |
| * This can sometimes be easier than using a JSONObject to build a string. |
| * @author JSON.org |
| * @version 2008-09-18 |
| */ |
| public class JSONStringer extends JSONWriter { |
| /** |
| * Make a fresh JSONStringer. It can be used to build one JSON text. |
| */ |
| public JSONStringer() { |
| super(new StringWriter()); |
| } |
| |
| /** |
| * Return the JSON text. This method is used to obtain the product of the |
| * JSONStringer instance. It will return <code>null</code> if there was a |
| * problem in the construction of the JSON text (such as the calls to |
| * <code>array</code> were not properly balanced with calls to |
| * <code>endArray</code>). |
| * @return The JSON text. |
| */ |
| public String toString() { |
| return this.mode == 'd' ? this.writer.toString() : null; |
| } |
| } |