79 lines
3.1 KiB
Java
79 lines
3.1 KiB
Java
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;
|
|
}
|
|
}
|