javax.json

Class Json

java.lang.Object

javax.json.Json

public final class Json
extends Object

Factory class for creating JSON processing objects. This class provides the most commonly used methods for creating these objects and their corresponding factories. The factory classes provide all the various ways to create these objects.

The methods in this class locate a provider instance using the method JsonProvider.provider(). This class uses the provider instance to create JSON processing objects.

The following example shows how to create a JSON parser to parse an empty array:

 
 StringReader reader = new StringReader("[]");
 JsonParser parser = Json.createParser(reader);
 
 

All the methods in this class are safe for use by multiple concurrent threads.

Method Summary

Modifier and Type	Method and Description
static JsonArrayBuilder	createArrayBuilder() Creates a JSON array builder
static JsonArrayBuilder	createArrayBuilder(Collection<?> collection) Creates a JSON array builder, initialized with the content of specified collection.
static JsonArrayBuilder	createArrayBuilder(JsonArray array) Creates a JSON array builder, initialized with the specified array
static JsonBuilderFactory	createBuilderFactory(Map<String,?> config) Creates a builder factory for creating JsonArrayBuilder and JsonObjectBuilder objects.
static JsonPatch	createDiff(JsonStructure source, JsonStructure target) Generates a JSON Patch (RFC 6902) from the source and target JsonStructure.
static JsonGenerator	createGenerator(OutputStream out) Creates a JSON generator for writing JSON to a byte stream.
static JsonGenerator	createGenerator(Writer writer) Creates a JSON generator for writing JSON to a character stream.
static JsonGeneratorFactory	createGeneratorFactory(Map<String,?> config) Creates a generator factory for creating JsonGenerator objects.
static JsonMergePatch	createMergeDiff(JsonValue source, JsonValue target) Generates a JSON Merge Patch (RFC 7396) from the source and target JsonValues which when applied to the source, yields the target.
static JsonMergePatch	createMergePatch(JsonValue patch) Creates JSON Merge Patch (RFC 7396) from specified JsonValue.
static JsonObjectBuilder	createObjectBuilder() Creates a JSON object builder
static JsonObjectBuilder	createObjectBuilder(JsonObject object) Creates a JSON object builder, initialized with the specified object.
static JsonObjectBuilder	createObjectBuilder(Map<String,Object> map) Creates a JSON object builder, initialized with the data from specified map.
static JsonParser	createParser(InputStream in) Creates a JSON parser from a byte stream.
static JsonParser	createParser(Reader reader) Creates a JSON parser from a character stream.
static JsonParserFactory	createParserFactory(Map<String,?> config) Creates a parser factory for creating JsonParser objects.
static JsonPatch	createPatch(JsonArray array) Creates a JSON Patch (RFC 6902) from the specified operations.
static JsonPatchBuilder	createPatchBuilder() Creates a JSON Patch builder (RFC 6902).
static JsonPatchBuilder	createPatchBuilder(JsonArray array) Creates a JSON Patch builder (RFC 6902), initialized with the specified operations.
static JsonPointer	createPointer(String jsonPointer) Creates JSON Pointer (RFC 6901) from given jsonPointer string.
static JsonReader	createReader(InputStream in) Creates a JSON reader from a byte stream.
static JsonReader	createReader(Reader reader) Creates a JSON reader from a character stream.
static JsonReaderFactory	createReaderFactory(Map<String,?> config) Creates a reader factory for creating JsonReader objects.
static JsonNumber	createValue(BigDecimal value) Creates a JsonNumber.
static JsonNumber	createValue(BigInteger value) Creates a JsonNumber.
static JsonNumber	createValue(double value) Creates a JsonNumber.
static JsonNumber	createValue(int value) Creates a JsonNumber.
static JsonNumber	createValue(long value) Creates a JsonNumber.
static JsonString	createValue(String value) Creates a JsonString.
static JsonWriter	createWriter(OutputStream out) Creates a JSON writer to write a JSON object or array structure to the specified byte stream.
static JsonWriter	createWriter(Writer writer) Creates a JSON writer to write a JSON object or array structure to the specified character stream.
static JsonWriterFactory	createWriterFactory(Map<String,?> config) Creates a writer factory for creating JsonWriter objects.
static String	decodePointer(String escaped) Decodes a passed JSON-pointer string as defined by RFC 6901.
static String	encodePointer(String pointer) Encodes (escapes) a passed string as defined by RFC 6901.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

createParser

public static JsonParser createParser(Reader reader)

Creates a JSON parser from a character stream.

Parameters:

reader - i/o reader from which JSON is to be read

Returns:

a JSON parser

createParser

public static JsonParser createParser(InputStream in)

Creates a JSON parser from a byte stream. The character encoding of the stream is determined as specified in RFC 7159.

Parameters:

in - i/o stream from which JSON is to be read

Returns:

a JSON parser

Throws:

JsonException - if encoding cannot be determined or i/o error (IOException would be cause of JsonException)

createGenerator

public static JsonGenerator createGenerator(Writer writer)

Creates a JSON generator for writing JSON to a character stream.

Parameters:

writer - a i/o writer to which JSON is written

Returns:

a JSON generator

createGenerator

public static JsonGenerator createGenerator(OutputStream out)

Creates a JSON generator for writing JSON to a byte stream.

Parameters:

out - i/o stream to which JSON is written

Returns:

a JSON generator

createParserFactory

public static JsonParserFactory createParserFactory(Map<String,?> config)

Creates a parser factory for creating JsonParser objects. The factory is configured with the specified map of provider specific configuration properties. Provider implementations should ignore any unsupported configuration properties specified in the map.

Parameters:

config - a map of provider specific properties to configure the JSON parsers. The map may be empty or null

Returns:

JSON parser factory

createGeneratorFactory

public static JsonGeneratorFactory createGeneratorFactory(Map<String,?> config)

Creates a generator factory for creating JsonGenerator objects. The factory is configured with the specified map of provider specific configuration properties. Provider implementations should ignore any unsupported configuration properties specified in the map.

Parameters:

config - a map of provider specific properties to configure the JSON generators. The map may be empty or null

Returns:

JSON generator factory

createWriter

public static JsonWriter createWriter(Writer writer)

Creates a JSON writer to write a JSON object or array structure to the specified character stream.

Parameters:

writer - to which JSON object or array is written

Returns:

a JSON writer

createWriter

public static JsonWriter createWriter(OutputStream out)

Creates a JSON writer to write a JSON object or array structure to the specified byte stream. Characters written to the stream are encoded into bytes using UTF-8 encoding.

Parameters:

out - to which JSON object or array is written

Returns:

a JSON writer

createReader

public static JsonReader createReader(Reader reader)

Creates a JSON reader from a character stream.

Parameters:

reader - a reader from which JSON is to be read

Returns:

a JSON reader

createReader

public static JsonReader createReader(InputStream in)

Creates a JSON reader from a byte stream. The character encoding of the stream is determined as described in RFC 7159.

Parameters:

in - a byte stream from which JSON is to be read

Returns:

a JSON reader

createReaderFactory

public static JsonReaderFactory createReaderFactory(Map<String,?> config)

Creates a reader factory for creating JsonReader objects. The factory is configured with the specified map of provider specific configuration properties. Provider implementations should ignore any unsupported configuration properties specified in the map.

Parameters:

config - a map of provider specific properties to configure the JSON readers. The map may be empty or null

Returns:

a JSON reader factory

createWriterFactory

public static JsonWriterFactory createWriterFactory(Map<String,?> config)

Creates a writer factory for creating JsonWriter objects. The factory is configured with the specified map of provider specific configuration properties. Provider implementations should ignore any unsupported configuration properties specified in the map.

Parameters:

config - a map of provider specific properties to configure the JSON writers. The map may be empty or null

Returns:

a JSON writer factory

createArrayBuilder

public static JsonArrayBuilder createArrayBuilder()

Creates a JSON array builder

Returns:

a JSON array builder

createArrayBuilder

public static JsonArrayBuilder createArrayBuilder(JsonArray array)

Creates a JSON array builder, initialized with the specified array

Parameters:

array - the initial array in the builder

Returns:

a JSON array builder

Since:

1.1

createArrayBuilder

public static JsonArrayBuilder createArrayBuilder(Collection<?> collection)

Creates a JSON array builder, initialized with the content of specified collection. If the @{code collection} contains Optionals then resulting JSON array builder contains the value from the collection only if the Optional is not empty.

Parameters:

collection - the initial data for the builder

Returns:

a JSON array builder

Throws:

IllegalArgumentException - if the value from the collection cannot be converted to the corresponding JsonValue

Since:

1.1

createObjectBuilder

public static JsonObjectBuilder createObjectBuilder()

Creates a JSON object builder

Returns:

a JSON object builder

createObjectBuilder

public static JsonObjectBuilder createObjectBuilder(JsonObject object)

Creates a JSON object builder, initialized with the specified object.

Parameters:

object - the initial object in the builder

Returns:

a JSON object builder

Since:

1.1

createObjectBuilder

public static JsonObjectBuilder createObjectBuilder(Map<String,Object> map)

Creates a JSON object builder, initialized with the data from specified map. If the @{code map} contains Optionals then resulting JSON object builder contains the key from the map only if the Optional is not empty.

Parameters:

map - the initial object in the builder

Returns:

a JSON object builder

Throws:

IllegalArgumentException - if the value from the map cannot be converted to the corresponding JsonValue

Since:

1.1

createPointer

public static JsonPointer createPointer(String jsonPointer)

Creates JSON Pointer (RFC 6901) from given jsonPointer string.

• An empty jsonPointer string defines a reference to the target itself.
• If the jsonPointer string is non-empty, it must be a sequence of '/' prefixed tokens.

Parameters:

jsonPointer - the valid escaped JSON Pointer string

Returns:

a JSON Pointer

Throws:

NullPointerException - if jsonPointer is null

JsonException - if jsonPointer is not a valid JSON Pointer

Since:

1.1

createPatchBuilder

public static JsonPatchBuilder createPatchBuilder()

Creates a JSON Patch builder (RFC 6902).

Returns:

a JSON Patch builder

Since:

1.1

createPatchBuilder

public static JsonPatchBuilder createPatchBuilder(JsonArray array)

Creates a JSON Patch builder (RFC 6902), initialized with the specified operations.

Parameters:

array - the initial patch operations

Returns:

a JSON Patch builder

Since:

1.1

createPatch

public static JsonPatch createPatch(JsonArray array)

Creates a JSON Patch (RFC 6902) from the specified operations.

Parameters:

array - patch operations

Returns:

a JSON Patch

Since:

1.1

createDiff

public static JsonPatch createDiff(JsonStructure source,
                                   JsonStructure target)

Generates a JSON Patch (RFC 6902) from the source and target JsonStructure. The generated JSON Patch need not be unique.

Parameters:

source - the source

target - the target, must be the same type as the source

Returns:

a JSON Patch which when applied to the source, yields the target

Since:

1.1

createMergePatch

public static JsonMergePatch createMergePatch(JsonValue patch)

Creates JSON Merge Patch (RFC 7396) from specified JsonValue.

Parameters:

patch - the patch

Returns:

a JSON Merge Patch

Since:

1.1

createMergeDiff

public static JsonMergePatch createMergeDiff(JsonValue source,
                                             JsonValue target)

Generates a JSON Merge Patch (RFC 7396) from the source and target JsonValues which when applied to the source, yields the target.

Parameters:

source - the source

target - the target

Returns:

a JSON Merge Patch

Since:

1.1

createBuilderFactory

public static JsonBuilderFactory createBuilderFactory(Map<String,?> config)

Creates a builder factory for creating JsonArrayBuilder and JsonObjectBuilder objects. The factory is configured with the specified map of provider specific configuration properties. Provider implementations should ignore any unsupported configuration properties specified in the map.

Parameters:

config - a map of provider specific properties to configure the JSON builders. The map may be empty or null

Returns:

a JSON builder factory

createValue

public static JsonString createValue(String value)

Creates a JsonString.

Parameters:

value - a JSON string

Returns:

the JsonString for the string

Since:

1.1

createValue

public static JsonNumber createValue(int value)

Creates a JsonNumber.

Parameters:

value - a JSON number

Returns:

the JsonNumber for the number

Since:

1.1

createValue

public static JsonNumber createValue(long value)

Creates a JsonNumber.

Parameters:

value - a JSON number

Returns:

the JsonNumber for the number

Since:

1.1

createValue

public static JsonNumber createValue(double value)

Creates a JsonNumber.

Parameters:

value - a JSON number

Returns:

the JsonNumber for the number

Since:

1.1

createValue

public static JsonNumber createValue(BigDecimal value)

Creates a JsonNumber.

Parameters:

value - a JSON number

Returns:

the JsonNumber for the number

Since:

1.1

createValue

public static JsonNumber createValue(BigInteger value)

Creates a JsonNumber.

Parameters:

value - a JSON number

Returns:

the JsonNumber for the number

Since:

1.1

encodePointer

public static String encodePointer(String pointer)

Encodes (escapes) a passed string as defined by RFC 6901. This method doesn't validate the passed JSON-pointer string.

Parameters:

pointer - the JSON-pointer string to encode

Returns:

encoded JSON-pointer string

Since:

1.1

decodePointer

public static String decodePointer(String escaped)

Decodes a passed JSON-pointer string as defined by RFC 6901. This method doesn't validate the passed JSON-pointer string.

Parameters:

escaped - the JSON-pointer string to decode

Returns:

decoded JSON-pointer string

Since:

1.1