Example usage for java.util Collections emptyMap

Introduction

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

Prototype

@SuppressWarnings("unchecked")
public static final <K, V> Map<K, V> emptyMap()

Source Link

Document

Returns an empty map (immutable).

Usage

From source file:de.tntinteractive.portalsammler.engine.MapReaderTest.java

@Test
public void testReadEmptyMap() throws Exception {
    final String input = "test123\n" + ".";
    final MapReader r = createReader(input);
    final Pair<String, Map<String, String>> p = r.readNext();
    assertEquals("test123", p.getLeft());
    assertEquals(Collections.emptyMap(), p.getRight());
    assertNull(r.readNext());/*from w w  w .j  av a  2s .  c  o  m*/
}

From source file:com.ikanow.aleph2.logging.utils.Log4JUtils.java

public static String getLog4JMessage(final JsonNode logObject, final Level level, final StackTraceElement stack,
        final String date_field, final Map<String, Object> map, final String hostname) {
    StringBuilder sb = new StringBuilder();
    final String c = stack.getClassName().substring(stack.getClassName().lastIndexOf(".") + 1);
    final String l = Integer.toString(stack.getLineNumber());
    final String thread = Thread.currentThread().getName().isEmpty()
            ? Long.toString(Thread.currentThread().getId())
            : Thread.currentThread().getName();
    sb.append(String.format(message_format, date_format.format(new Date(logObject.get(date_field).asLong())),
            thread, level.name(), c, l, logObject.get("message").asText()));
    sb.append(String.format(field_format, "bucket", logObject.get("bucket").asText()));
    sb.append(String.format(field_format, "hostname", hostname));
    sb.append(String.format(field_format, "subsystem", logObject.get("subsystem").asText()));
    sb.append(String.format(field_format, "command", logObject.get("command").asText()));
    Optional.ofNullable(map).orElse(Collections.emptyMap()).entrySet().stream()
            .forEach(e -> sb.append(String.format(field_format, e.getKey(), e.getValue())));
    return sb.toString();
}

From source file:com.orange.ngsi2.model.Attribute.java

public Map<String, Metadata> getMetadata() {
    if (metadata == null) {
        return Collections.emptyMap();
    }
    return metadata;
}

From source file:com.pinterest.deployservice.handler.DataHandler.java

public Map<String, String> getMapById(String id) throws Exception {
    if (StringUtils.isEmpty(id)) {
        return Collections.emptyMap();
    }/* w w  w  .  j a va2  s  . co m*/
    return CommonUtils.decodeData(dataDAO.getById(id).getData());
}

From source file:de.msquadrat.blobwizard.ServerConfiguration.java

public Map<String, Store> getStores() {
    if (stores == null) {
        return Collections.emptyMap();
    }/*w ww.ja  v a2 s  .c o  m*/
    return Collections.unmodifiableMap(stores);
}

From source file:org.elasticsearch.upgrades.TokenBackwardsCompatibilityIT.java

public void testGeneratingTokenInOldCluster() throws Exception {
    assumeTrue("this test should only run against the old cluster", clusterType == CLUSTER_TYPE.OLD);
    final StringEntity tokenPostBody = new StringEntity("{\n" + "    \"username\": \"test_user\",\n"
            + "    \"password\": \"x-pack-test-password\",\n" + "    \"grant_type\": \"password\"\n" + "}",
            ContentType.APPLICATION_JSON);
    Response response = client().performRequest("POST", "_xpack/security/oauth2/token", Collections.emptyMap(),
            tokenPostBody);/* www  .ja  va2s .  c o  m*/
    assertOK(response);
    Map<String, Object> responseMap = entityAsMap(response);
    String token = (String) responseMap.get("access_token");
    assertNotNull(token);
    assertTokenWorks(token);

    StringEntity oldClusterToken = new StringEntity("{\n" + "    \"token\": \"" + token + "\"\n" + "}",
            ContentType.APPLICATION_JSON);
    Response indexResponse = client().performRequest("PUT",
            "token_backwards_compatibility_it/doc/old_cluster_token1", Collections.emptyMap(), oldClusterToken);
    assertOK(indexResponse);

    response = client().performRequest("POST", "_xpack/security/oauth2/token", Collections.emptyMap(),
            tokenPostBody);
    assertOK(response);
    responseMap = entityAsMap(response);
    token = (String) responseMap.get("access_token");
    assertNotNull(token);
    assertTokenWorks(token);
    oldClusterToken = new StringEntity("{\n" + "    \"token\": \"" + token + "\"\n" + "}",
            ContentType.APPLICATION_JSON);
    indexResponse = client().performRequest("PUT", "token_backwards_compatibility_it/doc/old_cluster_token2",
            Collections.emptyMap(), oldClusterToken);
    assertOK(indexResponse);
}

From source file:org.craftercms.core.xml.mergers.impl.DescriptorMergerImpl.java

public DescriptorMergerImpl() {
    initialMergeCueParams = Collections.emptyMap();
}

From source file:org.elasticsearch.rest.action.main.RestMainActionIT.java

public void testHeadRequest() throws IOException {
    try (Response response = getRestClient().performRequest("HEAD", "/", Collections.emptyMap(), null)) {
        assertThat(response.getStatusLine().getStatusCode(), equalTo(200));
        assertNull(response.getEntity());
    }/*w  w w  . j ava2 s. c  o m*/
}

From source file:ch.cyberduck.core.Cache.java

public Cache(int size) {
    if (size == Integer.MAX_VALUE) {
        // Unlimited
        impl = Collections.synchronizedMap(new LinkedHashMap<T, AttributedList<T>>());
        reverse = Collections.synchronizedMap(new LinkedHashMap<CacheReference, T>());
    } else if (size == 0) {
        impl = Collections.emptyMap();
        reverse = Collections.emptyMap();
    } else {//from  www.j av  a 2 s.  c o  m
        // Will inflate to the given size
        impl = Collections.synchronizedMap(new LRUMap<T, AttributedList<T>>(size));
        reverse = Collections.synchronizedMap(new LinkedHashMap<CacheReference, T>());
    }
}

From source file:cop.raml.utils.javadoc.MethodJavaDoc.java

@NotNull
private static Map<String, TagParam> getParams(List<String> doc) {
    if (CollectionUtils.isEmpty(doc))
        return Collections.emptyMap();

    Map<String, TagParam> params = new LinkedMap<>();
    String paramName = null;/* w  w w .j av a  2  s.c om*/
    StringBuilder buf = null;
    Matcher matcher;

    for (String line : doc) {
        line = line.trim();

        if ((matcher = JavaDocTag.PARAM.getPattern().matcher(line)).find()) {
            if (paramName != null)
                addParameter(paramName, buf, params);

            paramName = matcher.group("name");
            buf = new StringBuilder(StringUtils.defaultString(matcher.group("text"), ""));
        } else if (paramName != null) {
            if (TAG.matcher(line).find()) {
                addParameter(paramName, buf, params);
                paramName = null;
            } else if (buf.length() > 0)
                buf.append('\n').append(line);
            else
                buf.append(line);
        }
    }

    if (paramName != null)
        addParameter(paramName, buf, params);

    return params.isEmpty() ? Collections.emptyMap() : Collections.unmodifiableMap(params);
}