org.springframework.data.rest.webmvc.json.ProjectionJacksonIntegrationTests.java Source code

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Here is the source code for org.springframework.data.rest.webmvc.json.ProjectionJacksonIntegrationTests.java

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/*
 * Copyright 2014-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.rest.webmvc.json;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;

import java.util.Arrays;

import org.junit.Before;
import org.junit.Test;
import org.springframework.data.projection.ProjectionFactory;
import org.springframework.data.projection.SpelAwareProxyProjectionFactory;
import org.springframework.hateoas.Resources;
import org.springframework.hateoas.core.EvoInflectorRelProvider;
import org.springframework.hateoas.hal.Jackson2HalModule;
import org.springframework.hateoas.hal.Jackson2HalModule.HalHandlerInstantiator;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.jayway.jsonpath.JsonPath;

/**
 * Integration tests for Jackson marshalling of projected objects.
 * 
 * @author Oliver Gierke
 */
public class ProjectionJacksonIntegrationTests {

    ObjectMapper mapper;
    ProjectionFactory factory = new SpelAwareProxyProjectionFactory();

    @Before
    public void setUp() {

        this.mapper = new ObjectMapper();
        this.mapper.registerModule(new Jackson2HalModule());
        this.mapper.setHandlerInstantiator(new HalHandlerInstantiator(new EvoInflectorRelProvider(), null, null));
    }

    /**
     * @see DATAREST-221
     */
    @Test
    public void considersJacksonAnnotationsOnProjectionInterfaces() throws Exception {

        Customer customer = new Customer();
        customer.firstname = "Dave";
        customer.lastname = "Matthews";
        customer.address = new Address();

        CustomerProjection projection = factory.createProjection(CustomerProjection.class, customer);

        String result = mapper.writeValueAsString(projection);
        assertThat(JsonPath.read(result, "$.firstname"), is((Object) "Dave"));
    }

    /**
     * @see DATAREST-221
     */
    @Test
    public void rendersHalContentCorrectly() throws Exception {

        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new Jackson2HalModule());
        mapper.setHandlerInstantiator(
                new Jackson2HalModule.HalHandlerInstantiator(new EvoInflectorRelProvider(), null, null));

        Customer customer = new Customer();
        customer.firstname = "Dave";
        customer.lastname = "Matthews";
        customer.address = new Address();

        CustomerProjection projection = factory.createProjection(CustomerProjection.class, customer);
        Resources<CustomerProjection> resources = new Resources<CustomerProjection>(Arrays.asList(projection));

        String result = mapper.writeValueAsString(resources);

        assertThat(JsonPath.read(result, "$._embedded.customers[0].firstname"), is((Object) "Dave"));
    }

    static class Customer {
        String firstname, lastname;
        Address address;
    }

    static class Address {

    }

    interface CustomerProjection {

        String getFirstname();

        @JsonIgnore
        String getLastname();
    }
}