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:com.android.tools.idea.gradle.project.GradleModelVersionCheck.java

@Nullable
static FullRevision getModelVersion(@NotNull AndroidProject androidProject) {
    String modelVersion = androidProject.getModelVersion();
    if (Strings.isNullOrEmpty(modelVersion)) {
        return null;
    }//from w  w  w  . j av  a 2  s  .co m
    int snapshotIndex = modelVersion.indexOf("-");
    if (snapshotIndex != -1) {
        modelVersion = modelVersion.substring(0, snapshotIndex);
    }
    try {
        return FullRevision.parseRevision(modelVersion);
    } catch (NumberFormatException e) {
        LOG.info(String.format("Unable to parse Gradle model version '%1$s'", modelVersion), e);
        return null;
    }
}

From source file:org.apache.druid.java.util.common.parsers.TimestampParser.java

public static Function<String, DateTime> createTimestampParser(final String format) {
    if ("auto".equalsIgnoreCase(format)) {
        // Could be iso or millis
        final DateTimes.UtcFormatter parser = DateTimes.wrapFormatter(createAutoParser());
        return (String input) -> {
            Preconditions.checkArgument(!Strings.isNullOrEmpty(input), "null timestamp");

            for (int i = 0; i < input.length(); i++) {
                if (input.charAt(i) < '0' || input.charAt(i) > '9') {
                    input = ParserUtils.stripQuotes(input);
                    int lastIndex = input.lastIndexOf(' ');
                    DateTimeZone timeZone = DateTimeZone.UTC;
                    if (lastIndex > 0) {
                        DateTimeZone timeZoneFromString = ParserUtils
                                .getDateTimeZone(input.substring(lastIndex + 1));
                        if (timeZoneFromString != null) {
                            timeZone = timeZoneFromString;
                            input = input.substring(0, lastIndex);
                        }//from  w  w w .  jav  a 2s  .c  o  m
                    }

                    return parser.parse(input).withZone(timeZone);
                }
            }

            return DateTimes.utc(Long.parseLong(input));
        };
    } else if ("iso".equalsIgnoreCase(format)) {
        return input -> {
            Preconditions.checkArgument(!Strings.isNullOrEmpty(input), "null timestamp");
            return DateTimes.of(ParserUtils.stripQuotes(input));
        };
    } else if ("posix".equalsIgnoreCase(format) || "millis".equalsIgnoreCase(format)
            || "micro".equalsIgnoreCase(format) || "nano".equalsIgnoreCase(format)) {
        final Function<Number, DateTime> numericFun = createNumericTimestampParser(format);
        return input -> {
            Preconditions.checkArgument(!Strings.isNullOrEmpty(input), "null timestamp");
            return numericFun.apply(Long.parseLong(ParserUtils.stripQuotes(input)));
        };
    } else if ("ruby".equalsIgnoreCase(format)) {
        final Function<Number, DateTime> numericFun = createNumericTimestampParser(format);
        return input -> {
            Preconditions.checkArgument(!Strings.isNullOrEmpty(input), "null timestamp");
            return numericFun.apply(Double.parseDouble(ParserUtils.stripQuotes(input)));
        };
    } else {
        try {
            final DateTimes.UtcFormatter formatter = DateTimes.wrapFormatter(DateTimeFormat.forPattern(format));
            return input -> {
                Preconditions.checkArgument(!Strings.isNullOrEmpty(input), "null timestamp");
                return formatter.parse(ParserUtils.stripQuotes(input));
            };
        } catch (Exception e) {
            throw new IAE(e, "Unable to parse timestamps with format [%s]", format);
        }
    }
}

From source file:org.haiku.haikudepotserver.dataobjects.User.java

public static List<User> findByEmail(ObjectContext context, String email) {
    Preconditions.checkArgument(null != context, "the context must be supplied");
    Preconditions.checkArgument(!Strings.isNullOrEmpty(email), "the email must be supplied");
    return ObjectSelect.query(User.class).where(EMAIL.eq(email)).select(context);
}

From source file:org.mayocat.jackson.OptionalStringDeserializer.java

@Override
public Optional<String> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
        throws IOException, JsonProcessingException {
    if (Strings.isNullOrEmpty(jsonParser.getValueAsString())) {
        return Optional.absent();
    }//from  www  . j  a  v  a2  s  .c o m
    return Optional.fromNullable(jsonParser.getValueAsString());
}

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

public static long payloadLength(URL url) throws IOException {
    Preconditions.checkArgument(null != url, "the url must be supplied");

    long result = -1;
    HttpURLConnection connection = null;

    switch (url.getProtocol()) {

    case "http":
    case "https":

        try {// ww  w.  ja va2 s  . c  o  m
            connection = (HttpURLConnection) url.openConnection();

            connection.setConnectTimeout(PAYLOAD_LENGTH_CONNECT_TIMEOUT);
            connection.setReadTimeout(PAYLOAD_LENGTH_READ_TIMEOUT);
            connection.setRequestMethod(HttpMethod.HEAD.name());
            connection.connect();

            String contentLengthHeader = connection.getHeaderField(HttpHeaders.CONTENT_LENGTH);

            if (!Strings.isNullOrEmpty(contentLengthHeader)) {
                long contentLength;

                try {
                    contentLength = Long.parseLong(contentLengthHeader);

                    if (contentLength > 0) {
                        result = contentLength;
                    } else {
                        LOGGER.warn("bad content length; {}", contentLength);
                    }
                } catch (NumberFormatException nfe) {
                    LOGGER.warn("malformed content length; {}", contentLengthHeader);
                }
            } else {
                LOGGER.warn("unable to get the content length header");
            }

        } finally {
            if (null != connection) {
                connection.disconnect();
            }
        }
        break;

    case "file":
        File file = new File(url.getPath());

        if (file.exists() && file.isFile()) {
            result = file.length();
        } else {
            LOGGER.warn("unable to find the local file; {}", url.getPath());
        }
        break;

    }

    LOGGER.info("did obtain length for url; {} - {}", url, result);

    return result;
}

From source file:com.arto.core.config.MqConfigManager.java

public static int getInt(String name, int value) {
    String val = MqConfigManager.getInstance().getValue(name);
    int result = value;
    if (!Strings.isNullOrEmpty(val)) {
        result = Integer.parseInt(val);
    }// ww w  .  ja  v  a 2 s .c  o m
    log.info("Load property '" + name + "' = " + result);
    return result;
}

From source file:org.eclipse.che.ide.ext.openshift.client.util.OpenshiftValidator.java

/**
 *
 * @param name//  w  ww .  j ava2 s .  c  om
 *         OpenShift application name
 * @return true if application name is valid, false otherwise
 */
public static boolean isApplicationNameValid(String name) {
    return !(Strings.isNullOrEmpty(name) || name.length() > 24 || name.length() < 2
            || !name.matches(PROJECT_NAME));
}

From source file:io.dataplay.storm.util.StormUtil.java

/**
 * Tells us whether this is a shutdown tuple or not.
 *
 * @param tuple The tuple to check./*from  w  w  w.ja  v a  2 s .c o m*/
 * @return True if it's a shutdown tuple, otherwise false.
 */
public static boolean isShutdownTuple(final Tuple tuple) {
    if (tuple.getSourceStreamId().equals(Stream.BOLT_MANAGEMENT.getName())) {
        String command = tuple.getString(Stream.BOLT_MANAGEMENT.getFields().fieldIndex("command"));
        return !Strings.isNullOrEmpty(command) && command.equals(TopologyCommand.SHUTDOWN);
    }
    return false;
}

From source file:org.isisaddons.wicket.wizard.fixture.scripts.todo.DeleteToDoItemsFor.java

@Override
public String validateRun(final String parameters) {
    return Strings.isNullOrEmpty(parameters) ? "Specify the owner of the ToDoItems to be deleted" : null;
}