com.tangosol.coherence.management.internal.MapProvider Maven / Gradle / Ivy

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/*
 * Copyright (c) 2000, 2022, Oracle and/or its affiliates.
 *
 * Licensed under the Universal Permissive License v 1.0 as shown at
 * https://oss.oracle.com/licenses/upl.
 */
package com.tangosol.coherence.management.internal;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.tangosol.net.management.MapJsonBodyHandler;

import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.WebApplicationException;

import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.MultivaluedMap;

import jakarta.ws.rs.ext.MessageBodyReader;
import jakarta.ws.rs.ext.MessageBodyWriter;
import jakarta.ws.rs.ext.Provider;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * A {@link MessageBodyWriter} and {@link MessageBodyReader} for {@link Map}
 * or {@link LinkedHashMap}.
 * 
 * When converting json to a {@link Map} this class will produce instances
 * of {@link LinkedHashMap}.
 *
 * @author jk  2019.05.31
 */
@Provider
@Produces({MediaType.APPLICATION_JSON})
@Consumes({MediaType.APPLICATION_JSON})
public class MapProvider
        implements MessageBodyWriter>, MessageBodyReader>
    {
    // ----- MessageBodyWriter methods --------------------------------------

    @Override
    public boolean isWriteable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType)
        {
        return Map.class.equals(type) || LinkedHashMap.class.equals(type);
        }

    @Override
    public long getSize(Map map, Class type, Type genericType, Annotation[] annotations, MediaType mediaType)
        {
        return 0;
        }

    @Override
    @SuppressWarnings("unchecked")
    public void writeTo(Map                      map,
                        Class                       type,
                        Type                           genericType,
                        Annotation[]                   annotations,
                        MediaType                      mediaType,
                        MultivaluedMap httpHeaders,
                        OutputStream                   entityStream) throws IOException, WebApplicationException
        {
        f_handler.write((Map) map, entityStream);
        }

    // ----- MessageBodyReader methods --------------------------------------

    @Override
    public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType)
        {
        return Map.class.equals(type) || LinkedHashMap.class.equals(type);
        }

    @Override
    public Map readFrom(Class>               type,
                              Type                           genericType,
                              Annotation[]                   annotations,
                              MediaType                      mediaType,
                              MultivaluedMap httpHeaders,
                              InputStream                    entityStream) throws IOException, WebApplicationException
        {
        return f_handler.readMap(entityStream);
        }

    // ----- constants ------------------------------------------------------

    /**
     * The {@link ObjectMapper} to use to marshall {@link Map}s to and from json.
     */
    private static final MapJsonBodyHandler f_handler = MapJsonBodyHandler.ensureMapJsonBodyHandler();
    }