| package org.eclipse.rap.rwt.visualization.google.internal.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 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; |
| } |
| } |