CustomMultivaluedMapProviderTest.java

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package org.glassfish.jersey.tests.e2e.server;

import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;

import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;

import org.junit.Test;

import static junit.framework.TestCase.assertEquals;

/**
 * Tests that the Custom MultivaluedMap provider overrides the default
 * EntityProvider
 *
 * @author Petr Bouda (petr.bouda at oracle.com)
 */
public class CustomMultivaluedMapProviderTest extends JerseyTest {

    @Override
    protected Application configure() {
        return new ResourceConfig(
                TestResource.class,
                CustomMultivaluedMapProvider.class);
    }

    @Provider
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    public static class CustomMultivaluedMapProvider implements MessageBodyReader<MultivaluedMap<String, String>> {

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

        @Override
        @SuppressWarnings("unchecked")
        public MultivaluedMap readFrom(Class type, Type genericType, Annotation[] annotations, MediaType mediaType,
                MultivaluedMap httpHeaders, InputStream entityStream) throws IOException, WebApplicationException {
            MultivaluedMap map = new MultivaluedHashMap();
            map.add(getClass().getSimpleName(), getClass().getSimpleName().replace("Provider", "Reader"));
            return map;
        }
    }

    @Path("resource")
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    public static class TestResource {

        @POST
        @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
        public MultivaluedMap<String, String> map(MultivaluedMap<String, String> map) {
            return map;
        }

    }

    @Test
    public void testNullFormParam() {
        Response response = target("resource").request()
                .post(Entity.entity("map", MediaType.APPLICATION_FORM_URLENCODED_TYPE));
        assertEquals(200, response.getStatus());
        assertEquals("CustomMultivaluedMapProvider=CustomMultivaluedMapReader", response.readEntity(String.class));
    }

}