Example usage for com.google.common.base Strings isNullOrEmpty

Introduction

In this page you can find the example usage for com.google.common.base Strings isNullOrEmpty.

Prototype

public static boolean isNullOrEmpty(@Nullable String string)

Source Link

Document

Returns true if the given string is null or is the empty string.

Usage

From source file:jp.tomorrowkey.irkit4j.RemoteIRKit.java

@VisibleForTesting
static Messages getMessages(String clientKey, boolean clear, HttpClient httpClient) throws IOException {
    if (Strings.isNullOrEmpty(clientKey))
        throw new IllegalArgumentException("clientKey must not be null");
    if (httpClient == null)
        throw new IllegalArgumentException("httpClient must not be null");

    try {// w  w w  .ja v a2  s .  c o m
        String url = BASE_URL + "/messages";
        HttpRequest httpRequest = new HttpRequest(HttpRequestMethod.GET, url,
                new HttpParameter("clientkey", clientKey));
        if (clear)
            httpRequest.addParameters(new HttpParameter("clear", "1"));
        HttpResponse httpResponse = httpClient.request(httpRequest);
        int statusCode = httpResponse.getStatusCode();
        String content = httpResponse.getContent();
        if (statusCode == HttpStatusCode.OK) {
            return GSON.fromJson(content, Messages.class);
        } else {
            throw new UnexpectedStatusCodeException(statusCode, content);
        }
    } finally {
        httpClient.disconnect();
    }
}

From source file:com.dangdang.config.service.easyzk.support.localoverride.LocalOverrideFileLoader.java

public static Map<String, String> loadLocalProperties(String rootNode, String group) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(rootNode) && !Strings.isNullOrEmpty(group),
            "rootNode or group cannot be empty.");

    Map<String, String> properties = null;
    final String localOverrideFile = findLocalOverrideFile();
    InputStream in = null;//  www . j a  va  2 s  .c o m
    try {
        in = LocalOverrideFileLoader.class.getClassLoader().getResourceAsStream(localOverrideFile);
        if (in != null) {
            final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            final DocumentBuilder builder = factory.newDocumentBuilder();

            final Document doc = builder.parse(in);
            final Element factoriesNode = Preconditions.checkNotNull(doc.getDocumentElement(),
                    "Root xml node node-factories not exists.");

            Node factoryNode = findChild(factoriesNode, "node-factory", "root", rootNode);
            if (factoriesNode != null) {
                Node nodeGroup = findChild(factoryNode, "group", "id", group);
                if (nodeGroup != null) {
                    NodeList childNodes = nodeGroup.getChildNodes();
                    int nodeCount = childNodes.getLength();
                    if (nodeCount > 0) {
                        properties = Maps.newHashMap();
                        for (int i = 0; i < nodeCount; i++) {
                            Node item = childNodes.item(i);
                            if (item.hasAttributes()) {
                                NamedNodeMap attributes = item.getAttributes();
                                Node keyAttr = attributes.getNamedItem("key");
                                if (keyAttr != null) {
                                    String propKey = keyAttr.getNodeValue();
                                    String propVal = item.getFirstChild().getNodeValue();
                                    if (propKey != null && propVal != null) {
                                        properties.put(propKey, propVal);
                                    }
                                }

                            }

                        }
                    }
                }
            }
        }
    } catch (ParserConfigurationException e) {
        throw Throwables.propagate(e);
    } catch (SAXException e) {
        throw Throwables.propagate(e);
    } catch (IOException e) {
        throw Throwables.propagate(e);
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                // IGNORE
            }
        }
    }
    return properties;
}

From source file:com.google.protoeditor.parsing.AbstractProtoParser.java

/**
 * Returns the fully qualified name for the given identifier.
 *
 * @param outerName Name of the enclosing namespace, like message name.
 * @param name Name of the inner identifier.
 * @return  Fully qualified name for the identifier.
 *//*from  www.j  a  va2  s  .  c  o  m*/
protected static String toFQName(String outerName, String name) {
    return Strings.isNullOrEmpty(outerName) ? name : outerName + "." + name;
}

From source file:org.excalibur.core.util.YesNoEnum.java

public static YesNoEnum valueOfFrom(String value) {
    if (Strings.isNullOrEmpty(value)) {
        return YesNoEnum.NO;
    }/*  www  .  j ava2s. c  o m*/

    for (YesNoEnum val : values()) {
        if (val.getId() == value.charAt(0)) {
            return val;
        }
    }

    throw new IllegalArgumentException("Invalid value: " + value);
}

From source file:com.google.devtools.common.options.InvocationPolicyParser.java

/**
 * Parses InvocationPolicy in either of the accepted formats. Returns an empty policy if no policy
 * is provided.//from   ww  w . ja va 2 s  .  co m
 *
 * @throws com.google.devtools.common.options.OptionsParsingException if the value of
 *     --invocation_policy is invalid.
 */
public static InvocationPolicy parsePolicy(String policy) throws OptionsParsingException {
    if (Strings.isNullOrEmpty(policy)) {
        return InvocationPolicy.getDefaultInstance();
    }

    try {
        try {
            // First try decoding the policy as a base64 encoded binary proto.
            return InvocationPolicy
                    .parseFrom(BaseEncoding.base64().decode(CharMatcher.whitespace().removeFrom(policy)));
        } catch (IllegalArgumentException e) {
            // If the flag value can't be decoded from base64, try decoding the policy as a text
            // formatted proto.
            InvocationPolicy.Builder builder = InvocationPolicy.newBuilder();
            TextFormat.merge(policy, builder);
            return builder.build();
        }
    } catch (InvalidProtocolBufferException | TextFormat.ParseException e) {
        throw new OptionsParsingException("Malformed value of --invocation_policy: " + policy, e);
    }
}

From source file:monasca.api.app.validation.MetricNameValidation.java

/**
 * Validates the {@code metricName} for the character constraints.
 * /*from www  .java2 s  .co m*/
 * @throws WebApplication if validation fails
 */
public static void validate(String metricName, boolean nameRequiredFlag) {

    // General validations

    if (Strings.isNullOrEmpty(metricName)) {
        if (nameRequiredFlag) {
            throw Exceptions.unprocessableEntity("Metric name is required");
        } else {
            return;
        }
    }

    if (metricName.length() > CreateMetricCommand.MAX_NAME_LENGTH)
        throw Exceptions.unprocessableEntity("Metric name %s must be %d characters or less", metricName,
                CreateMetricCommand.MAX_NAME_LENGTH);
    if (!VALID_METRIC_NAME.matcher(metricName).matches())
        throw Exceptions.unprocessableEntity("Metric name %s may not contain: > < = { } ( ) ' \" \\ , ; &",
                metricName);
}

From source file:org.apache.isis.core.metamodel.facets.object.parseable.ParserUtil.java

public static String parserNameFromConfiguration(final Class<?> type, final IsisConfiguration configuration) {
    final String key = PARSER_NAME_KEY_PREFIX + type.getCanonicalName() + PARSER_NAME_KEY_SUFFIX;
    final String parserName = configuration.getString(key);
    return !Strings.isNullOrEmpty(parserName) ? parserName : null;
}

From source file:com.google.cloud.tools.appengine.cloudsdk.internal.args.Args.java

/**
 * Produces the flag form of a string value, separated with an equals character.
 *
 * @return {@code [--name=value]} or {@code []} if value is null.
 *//*from  w w w  .  jav a 2s  .co m*/
static List<String> stringWithEq(String name, String value) {
    if (!Strings.isNullOrEmpty(value)) {
        return Collections.singletonList("--" + name + "=" + value);
    }
    return Collections.emptyList();
}

From source file:org.xdi.oxd.licenser.server.service.ValidationService.java

public LdapLicenseId getLicenseId(String licenseId) {
    try {//from w w w  .j av  a 2s  .c o  m
        if (!Strings.isNullOrEmpty(licenseId)) {
            final LdapLicenseId byId = licenseIdService.getById(licenseId);
            if (byId != null) {
                return byId;
            }
        }
        LOG.error("License ID is blank" + licenseId);
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
    }
    throw new WebApplicationException(ErrorService.response("Failed to find License ID with id: " + licenseId));
}

From source file:org.haiku.haikudepotserver.support.HttpRequestClientIdentifierSupplier.java

@Override
public Optional<String> get() {
    if (null != request) {
        String result = request.getHeader(HttpHeaders.X_FORWARDED_FOR);

        if (!Strings.isNullOrEmpty(result)) {
            return Optional.of(result);
        }/* w ww.  j  a va 2  s  . co  m*/

        result = request.getRemoteAddr();

        if (!Strings.isNullOrEmpty(result)) {
            return Optional.of(result);
        }
    }

    return Optional.empty();
}