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package javax.json;
import javax.json.spi.JsonProvider;
import javax.json.stream.JsonGenerator;
import javax.json.stream.JsonGeneratorFactory;
import javax.json.stream.JsonParser;
import javax.json.stream.JsonParserFactory;
import java.io.*;
import java.util.Map;
/**
* 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.
*
* <p>
* The methods in this class locate a provider instance using the method
* {@link JsonProvider#provider()}. This class uses the provider instance
* to create JSON processing objects.
*
* <p>
* The following example shows how to create a JSON parser to parse
* an empty array:
* <pre>
* <code>
* StringReader reader = new StringReader("[]");
* JsonParser parser = Json.createParser(reader);
* </code>
* </pre>
*
* <p>
* All the methods in this class are safe for use by multiple concurrent
* threads.
*
* @author Jitendra Kotamraju
*/
public class Json {
private Json() {
}
/**
* Creates a JSON parser from a character stream.
*
* @param reader i/o reader from which JSON is to be read
* @return a JSON parser
*/
public static JsonParser createParser(Reader reader) {
return JsonProvider.provider().createParser(reader);
}
/**
* Creates a JSON parser from a byte stream.
* The character encoding of the stream is determined as specified in
* <a href="http://tools.ietf.org/rfc/rfc4627.txt">RFC 4627</a>.
*
* @param in i/o stream from which JSON is to be read
* @throws JsonException if encoding cannot be determined
* or i/o error (IOException would be cause of JsonException)
* @return a JSON parser
*/
public static JsonParser createParser(InputStream in) {
return JsonProvider.provider().createParser(in);
}
/**
* Creates a JSON generator for writing JSON to a character stream.
*
* @param writer a i/o writer to which JSON is written
* @return a JSON generator
*/
public static JsonGenerator createGenerator(Writer writer) {
return JsonProvider.provider().createGenerator(writer);
}
/**
* Creates a JSON generator for writing JSON to a byte stream.
*
* @param out i/o stream to which JSON is written
* @return a JSON generator
*/
public static JsonGenerator createGenerator(OutputStream out) {
return JsonProvider.provider().createGenerator(out);
}
/**
* Creates a parser factory for creating {@link JsonParser} objects.
*
* @return JSON parser factory.
*
public static JsonParserFactory createParserFactory() {
return JsonProvider.provider().createParserFactory();
}
*/
/**
* Creates a parser factory for creating {@link 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.
*
* @param config a map of provider specific properties to configure the
* JSON parsers. The map may be empty or null
* @return JSON parser factory
*/
public static JsonParserFactory createParserFactory(Map<String, ?> config) {
return JsonProvider.provider().createParserFactory(config);
}
/**
* Creates a generator factory for creating {@link JsonGenerator} objects.
*
* @return JSON generator factory
*
public static JsonGeneratorFactory createGeneratorFactory() {
return JsonProvider.provider().createGeneratorFactory();
}
*/
/**
* Creates a generator factory for creating {@link 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.
*
* @param config a map of provider specific properties to configure the
* JSON generators. The map may be empty or null
* @return JSON generator factory
*/
public static JsonGeneratorFactory createGeneratorFactory(
Map<String, ?> config) {
return JsonProvider.provider().createGeneratorFactory(config);
}
/**
* Creates a JSON writer to write a
* JSON {@link JsonObject object} or {@link JsonArray array}
* structure to the specified character stream.
*
* @param writer to which JSON object or array is written
* @return a JSON writer
*/
public static JsonWriter createWriter(Writer writer) {
return JsonProvider.provider().createWriter(writer);
}
/**
* Creates a JSON writer to write a
* JSON {@link JsonObject object} or {@link JsonArray array}
* structure to the specified byte stream. Characters written to
* the stream are encoded into bytes using UTF-8 encoding.
*
* @param out to which JSON object or array is written
* @return a JSON writer
*/
public static JsonWriter createWriter(OutputStream out) {
return JsonProvider.provider().createWriter(out);
}
/**
* Creates a JSON reader from a character stream.
*
* @param reader a reader from which JSON is to be read
* @return a JSON reader
*/
public static JsonReader createReader(Reader reader) {
return JsonProvider.provider().createReader(reader);
}
/**
* Creates a JSON reader from a byte stream. The character encoding of
* the stream is determined as described in
* <a href="http://tools.ietf.org/rfc/rfc4627.txt">RFC 4627</a>.
*
* @param in a byte stream from which JSON is to be read
* @return a JSON reader
*/
public static JsonReader createReader(InputStream in) {
return JsonProvider.provider().createReader(in);
}
/**
* Creates a reader factory for creating {@link 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.
*
* @param config a map of provider specific properties to configure the
* JSON readers. The map may be empty or null
* @return a JSON reader factory
*/
public static JsonReaderFactory createReaderFactory(Map<String, ?> config) {
return JsonProvider.provider().createReaderFactory(config);
}
/**
* Creates a writer factory for creating {@link 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.
*
* @param config a map of provider specific properties to configure the
* JSON writers. The map may be empty or null
* @return a JSON writer factory
*/
public static JsonWriterFactory createWriterFactory(Map<String, ?> config) {
return JsonProvider.provider().createWriterFactory(config);
}
/**
* Creates a JSON array builder
*
* @return a JSON array builder
*/
public static JsonArrayBuilder createArrayBuilder() {
return JsonProvider.provider().createArrayBuilder();
}
/**
* Creates a JSON object builder
*
* @return a JSON object builder
*/
public static JsonObjectBuilder createObjectBuilder() {
return JsonProvider.provider().createObjectBuilder();
}
/**
* Creates a builder factory for creating {@link JsonArrayBuilder}
* and {@link 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.
*
* @param config a map of provider specific properties to configure the
* JSON builders. The map may be empty or null
* @return a JSON builder factory
*/
public static JsonBuilderFactory createBuilderFactory(
Map<String, ?> config) {
return JsonProvider.provider().createBuilderFactory(config);
}
}