org.springframework.hateoas.client.Server.java Source code

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Here is the source code for org.springframework.hateoas.client.Server.java

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/*
 * Copyright 2013-2014 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.hateoas.client;

import static net.jadler.Jadler.*;

import java.io.Closeable;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Collections;
import java.util.UUID;

import org.springframework.hateoas.Link;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.RelProvider;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.Resources;
import org.springframework.hateoas.core.EvoInflectorRelProvider;
import org.springframework.hateoas.hal.Jackson2HalModule;
import org.springframework.http.MediaType;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * Helper class for integration tests.
 * 
 * @author Oliver Gierke
 */
public class Server implements Closeable {

    private final ObjectMapper mapper;
    private final RelProvider relProvider;

    private final MultiValueMap<Link, Link> baseResources = new LinkedMultiValueMap<Link, Link>();

    public Server() {

        this.relProvider = new EvoInflectorRelProvider();

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

        initJadler(). //
                that().//
                respondsWithDefaultContentType(MediaTypes.HAL_JSON.toString()). //
                respondsWithDefaultStatus(200).//
                respondsWithDefaultEncoding(Charset.forName("UTF-8"));

        onRequest(). //
                havingPathEqualTo("/"). //
                respond(). //
                withBody("");

        // For GitHubLinkDiscoverer tests

        onRequest(). //
                havingPathEqualTo("/github"). //
                respond(). //
                withBody("{ \"foo_url\" : \"" + rootResource() + "/github/4711\"}"). //
                withContentType(MediaType.APPLICATION_JSON_VALUE);

        onRequest(). //
                havingPathEqualTo("/github/4711"). //
                respond(). //
                withBody("{ \"key\" : \"value\"}"). //
                withContentType(MediaType.APPLICATION_JSON_VALUE);
    }

    public String rootResource() {
        return "http://localhost:" + port();
    }

    public String mockResourceFor(Resource<?> resource) {

        Object content = resource.getContent();

        Class<? extends Object> type = content.getClass();
        String collectionRel = relProvider.getCollectionResourceRelFor(type);
        String singleRel = relProvider.getItemResourceRelFor(type);

        String baseResourceUri = String.format("%s/%s", rootResource(), collectionRel);
        String resourceUri = String.format("%s/%s", baseResourceUri, UUID.randomUUID().toString());

        baseResources.add(new Link(baseResourceUri, collectionRel), new Link(resourceUri, singleRel));

        register(resourceUri, resource);

        return resourceUri;
    }

    public void finishMocking() {

        Resources<String> resources = new Resources<String>(Collections.<String>emptyList());

        for (Link link : baseResources.keySet()) {

            resources.add(link);

            Resources<String> nested = new Resources<String>(Collections.<String>emptyList());
            nested.add(baseResources.get(link));

            register(link.getHref(), nested);
        }

        register("/", resources);
    }

    private void register(String path, Object response) {

        path = path.startsWith(rootResource()) ? path.substring(rootResource().length()) : path;

        try {
            onRequest(). //
                    havingMethodEqualTo("GET"). //
                    havingPathEqualTo(path). //
                    respond().//
                    withBody(mapper.writeValueAsString(response));
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    /* 
     * (non-Javadoc)
     * @see java.io.Closeable#close()
     */
    @Override
    public void close() throws IOException {
        closeJadler();
    }
}