https://github.com/eclipse-ee4j/jsonp: Jakarta JSON Processing defines a Java(R) based framework for parsing, generating, transforming, and querying JSON documents. (Eclipse Foundation)
  • Dmitry Kornilov (Oracle)
  • Lukas Jungmann (Oracle) 
/*
 * Copyright (c) 2011, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package javax.json.spi;

import javax.json.*;
import javax.json.stream.JsonGenerator;
import javax.json.stream.JsonGeneratorFactory;
import javax.json.stream.JsonParser;
import javax.json.stream.JsonParserFactory;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.ServiceLoader;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Optional;


Service provider for JSON processing objects.

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

See Also:
  • ServiceLoader
/**
 * Service provider for JSON processing objects.
 *
 * <p>All the methods in this class are safe for use by multiple concurrent
 * threads.
 *
 * @see ServiceLoader
 */
public abstract class JsonProvider {

    
A constant representing the name of the default JsonProvider implementation class. 
/**
     * A constant representing the name of the default
     * {@code JsonProvider} implementation class.
     */
    private static final String DEFAULT_PROVIDER
            = "org.glassfish.json.JsonProviderImpl";

    protected JsonProvider() {
    }

    
Creates a JSON provider object. The provider is loaded using the ServiceLoader.load(Class<Object>) method. If there are no available service providers, this method returns the default service provider. Users are recommended to cache the result of this method. 
See Also:
Returns:a JSON provider
/**
     * Creates a JSON provider object. The provider is loaded using the
     * {@link ServiceLoader#load(Class)} method. If there are no available
     * service providers, this method returns the default service provider.
     * Users are recommended to cache the result of this method.
     *
     * @see ServiceLoader
     * @return a JSON provider
     */
    public static JsonProvider provider() {
        ServiceLoader<JsonProvider> loader = ServiceLoader.load(JsonProvider.class);
        Iterator<JsonProvider> it = loader.iterator();
        if (it.hasNext()) {
            return it.next();
        }
        try {
            Class<?> clazz = Class.forName(DEFAULT_PROVIDER);
            return (JsonProvider) clazz.newInstance();
        } catch (ClassNotFoundException x) {
            throw new JsonException(
                    "Provider " + DEFAULT_PROVIDER + " not found", x);
        } catch (Exception x) {
            throw new JsonException(
                    "Provider " + DEFAULT_PROVIDER + " could not be instantiated: " + x,
                    x);
        }
    }

    
Creates a JSON parser from a character stream.

Params:
  • reader – i/o reader from which JSON is to be read
Returns:a JSON parser
/**
     * 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 abstract JsonParser createParser(Reader reader);

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

Params:
  • 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)
Returns:a JSON parser
/**
     * Creates a JSON parser from the specified byte stream.
     * The character encoding of the stream is determined
     * as defined in <a href="http://tools.ietf.org/rfc/rfc7159.txt">RFC 7159
     * </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 abstract JsonParser createParser(InputStream in);

    /**
     * Creates a parser factory for creating {@link JsonParser} instances.
     *
     * @return a JSON parser factory
     *
    public abstract JsonParserFactory createParserFactory();
     */

    
Creates a parser factory for creating JsonParser instances. 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. 
Params:
  • config – a map of provider specific properties to configure the
              JSON parsers. The map may be empty or null
Returns:a JSON parser factory
/**
     * Creates a parser factory for creating {@link JsonParser} instances.
     * 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 a JSON parser factory
     */
    public abstract JsonParserFactory createParserFactory(Map<String, ?> config);

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

Params:
  • writer – a i/o writer to which JSON is written
Returns:a JSON generator
/**
     * Creates a JSON generator for writing JSON text to a character stream.
     *
     * @param writer a i/o writer to which JSON is written
     * @return a JSON generator
     */
    public abstract JsonGenerator createGenerator(Writer writer);

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

Params:
  • out – i/o stream to which JSON is written
Returns:a JSON generator
/**
     * Creates a JSON generator for writing JSON text to a byte stream.
     *
     * @param out i/o stream to which JSON is written
     * @return a JSON generator
     */
    public abstract JsonGenerator createGenerator(OutputStream out);

    /**
     * Creates a generator factory for creating {@link JsonGenerator} instances.
     *
     * @return a JSON generator factory
     *
    public abstract JsonGeneratorFactory createGeneratorFactory();
     */

    
Creates a generator factory for creating JsonGenerator instances. 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. 
Params:
  • config – a map of provider specific properties to configure the
              JSON generators. The map may be empty or null
Returns:a JSON generator factory
/**
     * Creates a generator factory for creating {@link JsonGenerator} instances.
     * 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 a JSON generator factory
     */
    public abstract JsonGeneratorFactory createGeneratorFactory(Map<String, ?> config);

    
Creates a JSON reader from a character stream.

Params:
  • reader – a reader from which JSON is to be read
Returns:a JSON reader
/**
     * Creates a JSON reader from a character stream.
     *
     * @param reader a reader from which JSON is to be read
     * @return a JSON reader
     */
    public abstract JsonReader createReader(Reader reader);

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

Params:
  • in – a byte stream from which JSON is to be read
Returns:a JSON 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/rfc7159.txt">RFC 7159</a>.
     *
     * @param in a byte stream from which JSON is to be read
     * @return a JSON reader
     */
    public abstract JsonReader createReader(InputStream in);

    
Creates a JSON writer to write a JSON object or array structure to the specified character stream. 
Params:
  • writer – to which JSON object or array is written
Returns:a JSON writer
/**
     * 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 abstract JsonWriter createWriter(Writer writer);

    
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. 
Params:
  • out – to which JSON object or array is written
Returns:a JSON 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 abstract JsonWriter createWriter(OutputStream out);

    
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. 
Params:
  • config – a map of provider specific properties to configure the
              JSON writers. The map may be empty or null
Returns:a JSON writer factory
/**
     * 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 abstract JsonWriterFactory createWriterFactory(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. 
Params:
  • config – a map of provider specific properties to configure the
              JSON readers. The map may be empty or null
Returns:a JSON reader factory
/**
     * 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 abstract JsonReaderFactory createReaderFactory(Map<String,?> config);

    
Creates a JSON object builder.

Returns:a JSON object builder
/**
     * Creates a JSON object builder.
     *
     * @return a JSON object builder
     */
    public abstract JsonObjectBuilder createObjectBuilder();

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

Params:
  • object – the initial JSON object in the builder
Returns:a JSON object builder
Since:1.1
/**
     * Creates a JSON object builder, initialized with the specified object.
     *
     * @param object the initial JSON object in the builder
     * @return a JSON object builder
     *
     * @since 1.1
     */
    public JsonObjectBuilder createObjectBuilder(JsonObject object) {
        throw new UnsupportedOperationException();
    }

    
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. 
Params:
  • map – the initial object in the builder
Throws:
Returns:a JSON object builder
Since:1.1
/**
     * Creates a JSON object builder, initialized with the data from specified {@code map}.
     * If the @{code map} contains {@link Optional}s then resulting JSON object builder
     * contains the key from the {@code map} only if the {@link Optional} is not empty.
     *
     * @param map the initial object in the builder
     * @return a JSON object builder
     * @exception IllegalArgumentException if the value from the {@code map} cannot be converted
     *            to the corresponding {@link JsonValue}
     *
     * @since 1.1
     */
    public JsonObjectBuilder createObjectBuilder(Map<String, Object> map) {
        throw new UnsupportedOperationException();
    }

    
Creates a JSON array builder.

Returns:a JSON array builder
/**
     * Creates a JSON array builder.
     *
     * @return a JSON array builder
     */
    public abstract JsonArrayBuilder createArrayBuilder();

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

Params:
  • array – the initial JSON array in the builder
Returns:a JSON array builder
Since:1.1
/**
     * Creates a JSON array builder, initialized with the specified array.
     *
     * @param array the initial JSON array in the builder
     * @return a JSON array builder
     *
     * @since 1.1
     */
    public JsonArrayBuilder createArrayBuilder(JsonArray array) {
        throw new UnsupportedOperationException();
    }

    
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.
    • 



Params:
  • jsonPointer – the JSON Pointer string
Throws:
Returns:a JSON Pointer
Since:1.1
/**
     * Creates JSON Pointer (<a href="http://tools.ietf.org/html/rfc6901">RFC 6901</a>)
     * from given {@code jsonPointer} string.
     * <ul>
     *     <li>An empty {@code jsonPointer} string defines a reference to the target itself.</li>
     *     <li>If the {@code jsonPointer} string is non-empty, it must be a sequence of '{@code /}' prefixed tokens.</li>
     * </ul>
     *
     * @param jsonPointer the JSON Pointer string
     * @throws NullPointerException if {@code jsonPointer} is {@code null}
     * @throws JsonException if {@code jsonPointer} is not a valid JSON Pointer
     * @return a JSON Pointer
     *
     * @since 1.1
     */
    public JsonPointer createPointer(String jsonPointer) {
        throw new UnsupportedOperationException();
    }

    
Creates a JSON Patch builder (RFC 6902).

Returns:a JSON Patch builder
Since:1.1
/**
     * Creates a JSON Patch builder (<a href="http://tools.ietf.org/html/rfc6902">RFC 6902</a>).
     *
     * @return a JSON Patch builder
     *
     * @since 1.1
     */
    public JsonPatchBuilder createPatchBuilder() {
        throw new UnsupportedOperationException();
    }

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

Params:
  • array – the initial patch operations
Returns:a JSON Patch builder
Since:1.1
/**
     * Creates a JSON Patch builder
     * (<a href="http://tools.ietf.org/html/rfc6902">RFC 6902</a>),
     * initialized with the specified operations.
     *
     * @param array the initial patch operations
     * @return a JSON Patch builder
     *
     * @since 1.1
     */
    public JsonPatchBuilder createPatchBuilder(JsonArray array) {
        throw new UnsupportedOperationException();
    }

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

Params:
  • array – patch operations
Returns:a JSON Patch
Since:1.1
/**
     * Creates a JSON Patch (<a href="http://tools.ietf.org/html/rfc6902">RFC 6902</a>)
     * from the specified operations.
     *
     * @param array patch operations
     * @return a JSON Patch
     *
     * @since 1.1
     */
    public JsonPatch createPatch(JsonArray array) {
        throw new UnsupportedOperationException();
    }

    
Generates a JSON Patch (RFC 6902) from the source and target JsonStructure. The generated JSON Patch need not be unique. 
Params:
  • 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
/**
     * Generates a JSON Patch (<a href="http://tools.ietf.org/html/rfc6902">RFC 6902</a>)
     * from the source and target {@code JsonStructure}.
     * The generated JSON Patch need not be unique.
     *
     * @param source the source
     * @param target the target, must be the same type as the source
     * @return a JSON Patch which when applied to the source, yields the target
     *
     * @since 1.1
     */
    public JsonPatch createDiff(JsonStructure source, JsonStructure target) {
        throw new UnsupportedOperationException();
    }

    
Creates JSON Merge Patch (RFC 7396) from specified JsonValue. 
Params:
  • patch – the patch
Returns:a JSON Merge Patch
Since:1.1
/**
     * Creates JSON Merge Patch (<a href="http://tools.ietf.org/html/rfc7396">RFC 7396</a>)
     * from specified {@code JsonValue}.
     *
     * @param patch the patch
     * @return a JSON Merge Patch
     *
     * @since 1.1
     */
    public JsonMergePatch createMergePatch(JsonValue patch) {
        throw new UnsupportedOperationException();
    }

    
Generates a JSON Merge Patch (RFC 7396) from the source and target JsonValues which when applied to the source, yields the target. 
Params:
  • source – the source
  • target – the target
Returns:a JSON Merge Patch
Since:1.1
/**
     * Generates a JSON Merge Patch (<a href="http://tools.ietf.org/html/rfc7396">RFC 7396</a>)
     * from the source and target {@code JsonValue}s
     * which when applied to the {@code source}, yields the {@code target}.
     *
     * @param source the source
     * @param target the target
     * @return a JSON Merge Patch
     *
     * @since 1.1
     */
    public JsonMergePatch createMergeDiff(JsonValue source, JsonValue target) {
        throw new UnsupportedOperationException();
    }

    
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. 
Params:
  • collection – the initial data for the builder
Throws:
Returns:a JSON array builder
Since:1.1
/**
     * Creates a JSON array builder, initialized with the content of specified {@code collection}.
     * If the @{code collection} contains {@link Optional}s then resulting JSON array builder
     * contains the value from the {@code collection} only if the {@link Optional} is not empty.
     *
     * @param collection the initial data for the builder
     * @return a JSON array builder
     * @exception IllegalArgumentException if the value from the {@code collection} cannot be converted
     *            to the corresponding {@link JsonValue}
     *
     * @since 1.1
     */
    public JsonArrayBuilder createArrayBuilder(Collection<?> collection) {
        throw new UnsupportedOperationException();
    }


    
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. 
Params:
  • config – a map of provider specific properties to configure the
              JSON builders. The map may be empty or null
Returns:a JSON builder factory
/**
     * 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 abstract JsonBuilderFactory createBuilderFactory(Map<String,?> config);

    
Creates a JsonString.

Params:
  • value – a JSON string
Returns:the JsonString for the string
Since:1.1
/**
     * Creates a JsonString.
     *
     * @param value a JSON string
     * @return the JsonString for the string
     *
     * @since 1.1
     */
    public JsonString createValue(String value) {
        throw new UnsupportedOperationException();
    }

    
Creates a JsonNumber.

Params:
  • value – a JSON number
Returns:the JsonNumber for the number
Since:1.1
/**
     * Creates a JsonNumber.
     *
     * @param value a JSON number
     * @return the JsonNumber for the number
     *
     * @since 1.1
     */
    public JsonNumber createValue(int value) {
        throw new UnsupportedOperationException();
    }

    
Creates a JsonNumber.

Params:
  • value – a JSON number
Returns:the JsonNumber for the number
Since:1.1
/**
     * Creates a JsonNumber.
     *
     * @param value a JSON number
     * @return the JsonNumber for the number
     *
     * @since 1.1
     */
    public JsonNumber createValue(long value) {
        throw new UnsupportedOperationException();
    }

    
Creates a JsonNumber.

Params:
  • value – a JSON number
Returns:the JsonNumber for the number
Since:1.1
/**
     * Creates a JsonNumber.
     *
     * @param value a JSON number
     * @return the JsonNumber for the number
     *
     * @since 1.1
     */
    public JsonNumber createValue(double value) {
        throw new UnsupportedOperationException();
    }

    
Creates a JsonNumber.

Params:
  • value – a JSON number
Returns:the JsonNumber for the number
Since:1.1
/**
     * Creates a JsonNumber.
     *
     * @param value a JSON number
     * @return the JsonNumber for the number
     *
     * @since 1.1
     */
    public JsonNumber createValue(BigDecimal value) {
        throw new UnsupportedOperationException();
    }

    
Creates a JsonNumber.

Params:
  • value – a JSON number
Returns:the JsonNumber for the number
Since:1.1
/**
     * Creates a JsonNumber.
     *
     * @param value a JSON number
     * @return the JsonNumber for the number
     *
     * @since 1.1
     */
    public JsonNumber createValue(BigInteger value) {
        throw new UnsupportedOperationException();
    }
}