Example usage for java.util Collections singletonMap

Introduction

In this page you can find the example usage for java.util Collections singletonMap.

Prototype

public static <K, V> Map<K, V> singletonMap(K key, V value)

Source Link

Document

Returns an immutable map, mapping only the specified key to the specified value.

Usage

From source file:Main.java

/**
 * Copies the given {@link Map} containing another {@link Map} into a new
 * {@link Map}.//from w w w  .ja v a  2 s .  c  om
 * 
 * @param <A>
 *            the type of the keys of the outer map
 * @param <B>
 *            the type of the keys of the map, that is the value of the
 *            outer map
 * @param <C>
 *            the type of the values of the map, that is the value of the
 *            outer map
 * @param data
 *            the given map
 * @return If the given map was empty, a {@link Collections#emptyMap()} is
 *         returned<br>
 *         If the given map contained only one entry, a
 *         {@link Collections#singletonMap(Object, Object)}, containing
 *         said entry, is returned <br>
 *         If the given map contained more than one element, a
 *         {@link Collections#unmodifiableMap(Map)}, containing the entries
 *         of the given map, is returned.
 */
public static <A, B, C> Map<A, Map<B, C>> copyDeep(Map<A, Map<B, C>> data) {
    final int size = data.size();

    switch (size) {
    case 0:
        return Collections.emptyMap();
    case 1:
        final A key = data.keySet().iterator().next();
        return Collections.singletonMap(key, copy(data.get(key)));
    default:
        final Map<A, Map<B, C>> newData = new HashMap<A, Map<B, C>>();
        for (Map.Entry<A, Map<B, C>> entry : data.entrySet()) {
            newData.put(entry.getKey(), copy(entry.getValue()));
        }
        return Collections.unmodifiableMap(newData);
    }
}

From source file:ch.hortis.mongodb.training.blog.oauth.BlogTokenEnhancer.java

@Override
public OAuth2AccessToken enhance(OAuth2AccessToken accessToken, OAuth2Authentication authentication) {
    DefaultOAuth2AccessToken result = new DefaultOAuth2AccessToken(accessToken);
    result.setAdditionalInformation(Collections.singletonMap("client_id",
            (Object) authentication.getAuthorizationRequest().getClientId()));
    return result;
}

From source file:org.neo4j.cineasts.movieimport.MovieDbApiClient.java

private Map loadJsonData(String url) {
    try {/*  w  w w . j  ava  2  s  .  co m*/
        Map value = mapper.readValue(new URL(url), Map.class);
        if (value.isEmpty()) {
            return Collections.singletonMap("not_found", System.currentTimeMillis());
        }
        return value;
    } catch (Exception e) {
        throw new RuntimeException("Failed to get data from " + url, e);
    }
}

From source file:nl.conspect.legacy.user.web.LogoutController.java

protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    HttpSession session = request.getSession(false);
    if (session != null) {
        session.invalidate();//from w w w  .  j  av  a  2 s .  c o  m
    }
    return new ModelAndView("redirect:/app/index", Collections.singletonMap("msg", "Logout successful."));
}

From source file:org.cloudfoundry.identity.uaa.login.ProfileControllerTests.java

public void testGet() {
    controller.setLinks(Collections.singletonMap("foo", "http://example.com"));
    Mockito.when(restTemplate.getForObject(approvalsUri, Set.class))
            .thenReturn(Collections.singleton(Collections.singletonMap("clientId", "foo")));
    Model model = new ExtendedModelMap();
    controller.get(model);/*from  w  w w  .ja v a2  s.  c  o  m*/
    assertTrue(model.containsAttribute("links"));
    assertTrue(model.containsAttribute("approvals"));
}

From source file:com.graphaware.server.TxParticipationIntegrationTest.java

@Test
public void invalidTransactionShouldResultInException() {
    System.out.println(get(baseUrl() + "/graphaware/greeting", Collections.singletonMap("_GA_TX_ID", "invalid"),
            HttpStatus.SC_BAD_REQUEST));
}

From source file:org.elasticsearch.http.DetailedErrorsEnabledIT.java

public void testThatErrorTraceWorksByDefault() throws IOException {
    try {//from ww w.  ja v a  2s  .  c  o m
        getRestClient().performRequest("DELETE", "/", Collections.singletonMap("error_trace", "true"));
        fail("request should have failed");
    } catch (ResponseException e) {
        Response response = e.getResponse();
        assertThat(response.getHeader("Content-Type"), containsString("application/json"));
        assertThat(EntityUtils.toString(response.getEntity()),
                containsString("\"stack_trace\":\"[Validation Failed: 1: index / indices is missing;]; "
                        + "nested: ActionRequestValidationException[Validation Failed: 1:"));
    }

    try {
        getRestClient().performRequest("DELETE", "/");
        fail("request should have failed");
    } catch (ResponseException e) {
        Response response = e.getResponse();
        assertThat(response.getHeader("Content-Type"), containsString("application/json; charset=UTF-8"));
        assertThat(EntityUtils.toString(response.getEntity()),
                not(containsString("\"stack_trace\":\"[Validation Failed: 1: index / indices is missing;]; "
                        + "nested: ActionRequestValidationException[Validation Failed: 1:")));
    }
}

From source file:com.xyxy.platform.examples.showcase.demos.web.MashupServerController.java

@RequestMapping(value = "/web/mashup", produces = MediaTypes.JAVASCRIPT_UTF_8)
@ResponseBody/*from   w w  w . j  a v  a2 s  . co  m*/
public String mashup1(@RequestParam(DEFAULT_JQUERY_JSONP_CALLBACK_PARM_NAME) String callbackName) {

    // ??JSON.
    Map<String, String> map = Collections.singletonMap("content", "<p>?</p>");

    // .
    return mapper.toJsonP(callbackName, map);
}

From source file:com.graphaware.common.representation.GraphDetachedNodeTest.java

@Test
public void nodeRepresentationIsCorrectlyConvertedToJson() throws JsonProcessingException, JSONException {
    GraphDetachedNode representation = new GraphDetachedNode(0, new String[] { "Label1, Label2" },
            Collections.singletonMap("key", "value"));
    String actualStr = mapper.writeValueAsString(representation);
    System.out.println(actualStr);
    assertEquals("{\"graphId\":0,\"properties\":{\"key\":\"value\"},\"labels\":[\"Label1, Label2\"]}",
            actualStr, true);/*from  w ww  .  j  a  v  a2s . c o m*/
}

From source file:com.graphaware.common.representation.GraphDetachedRelationshipTest.java

@Test
public void relationshipRepresentationIsCorrectlyConvertedToJson()
        throws JsonProcessingException, JSONException {
    DetachedRelationship representation = new GraphDetachedRelationship(0, 1, 2, "TYPE",
            Collections.singletonMap("key", "value"));
    assertEquals(//ww w. j a  v a 2 s .co m
            "{\"graphId\":0,\"properties\":{\"key\":\"value\"},\"startNodeGraphId\":1,\"endNodeGraphId\":2,\"type\":\"TYPE\"}",
            mapper.writeValueAsString(representation), true);
}