public class JSONWriter extends Object
value method for appending values to the text, and a key method
for adding keys before values in objects. There are array and endArray methods that make and bound
array values, and object and endObject methods which make and bound object values. All of these
methods return the JSONWriter instance, permitting a cascade style. For example,
new JSONWriter(myWriter).object().key("JSON").value("Hello, World!").endObject();
which writes
{"JSON":"Hello, World!"}
The first method called must be array or object. There are no methods for adding commas or colons.
JSONWriter adds them for you. Objects and arrays can be nested up to 20 levels deep.
This can sometimes be easier than using a JSONObject to build a string.| Modifier and Type | Field and Description |
|---|---|
protected char |
mode
The current mode.
|
protected Writer |
writer
The writer that will receive the output.
|
| Constructor and Description |
|---|
JSONWriter(Writer w)
Make a fresh JSONWriter.
|
| Modifier and Type | Method and Description |
|---|---|
JSONWriter |
array()
Begin appending a new array.
|
JSONWriter |
endArray()
End an array.
|
JSONWriter |
endObject()
End an object.
|
JSONWriter |
key(String s)
Append a key.
|
JSONWriter |
object()
Begin appending a new object.
|
JSONWriter |
value(boolean b)
Append either the value
true or the value false. |
JSONWriter |
value(double d)
Append a double value.
|
JSONWriter |
value(long l)
Append a long value.
|
JSONWriter |
value(Object o)
Append an object value.
|
protected char mode
protected Writer writer
public JSONWriter(Writer w)
public JSONWriter array() throws JSONException
endArray will be appended to this array. The
endArray method must be called to mark the array's end.JSONException - If the nesting is too deep, or if the object is started in the wrong place (for example as a key or
after the end of the outermost array or object).public JSONWriter endArray() throws JSONException
array.JSONException - If incorrectly nested.public JSONWriter endObject() throws JSONException
object.JSONException - If incorrectly nested.public JSONWriter key(String s) throws JSONException
s - A key string.JSONException - If the key is out of place. For example, keys do not belong in arrays or if the key is null.public JSONWriter object() throws JSONException
endObject will be appended to this
object. The endObject method must be called to mark the object's end.JSONException - If the nesting is too deep, or if the object is started in the wrong place (for example as a key or
after the end of the outermost array or object).public JSONWriter value(boolean b) throws JSONException
true or the value false.b - A boolean.JSONExceptionpublic JSONWriter value(double d) throws JSONException
d - A double.JSONException - If the number is not finite.public JSONWriter value(long l) throws JSONException
l - A long.JSONExceptionpublic JSONWriter value(Object o) throws JSONException
o - The object to append. It can be null, or a Boolean, Number, String, JSONObject, or JSONArray, or an object with
a toJSONString() method.JSONException - If the value is out of sequence.Copyright © 2012 JBoss by Red Hat. All Rights Reserved.