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:org.onosproject.xosclient.api.VtnServiceId.java

/**
 * Returns the VtnServiceId with value./*from   www.  j a  v a2s .  c o  m*/
 *
 * @param id service id
 * @return CordServiceId
 */
public static VtnServiceId of(String id) {
    checkArgument(!Strings.isNullOrEmpty(id), "VTN service ID cannot be null");
    return new VtnServiceId(id);
}

From source file:org.jboss.hal.core.expression.Expression.java

public static Expression of(String value) {
    if (!Strings.isNullOrEmpty(value) && value.trim().length() != 0) {
        if (value.contains(EXPRESSION_START) && value.indexOf(EXPRESSION_END) > 1) {
            int init = value.indexOf(EXPRESSION_START);
            int end = value.indexOf(EXPRESSION_END);
            String token = value.substring(init + 2, end);
            String prefix = null;
            String suffix = null;
            if (init > 0) {
                prefix = value.substring(0, init);
            }// ww w.  j a  v a 2 s  .co  m
            if (end < value.length() - 1) {
                suffix = value.substring(end + 1);
            }
            int idx = token.indexOf(":");
            String defaultValue = null;
            if (idx != -1) {
                defaultValue = token.substring(idx + 1, token.length());
                token = token.substring(0, idx);
            }
            return new Expression(prefix, token, defaultValue, suffix);
        } else {
            throw new IllegalArgumentException(
                    "Illegal expression \"" + value + "\": Please use the pattern ${key[:default-value]}");
        }
    }
    throw new IllegalArgumentException("Empty expression: Please use the pattern ${key[:default-value]}");
}

From source file:com.edgar.jdbc.codegen.CodeGenUtil.java

public static boolean checkIfSourceCodeExists(String rootFolderPath, String packageName) throws Exception {
    boolean exists = false;
    String path = "";
    if (!Strings.isNullOrEmpty(packageName)) {
        path = CharMatcher.anyOf(".").replaceFrom(packageName, "/");
        if (!Strings.isNullOrEmpty(rootFolderPath)) {
            path = rootFolderPath + "/" + path;
        }//from  ww w.  j a  v  a  2s . co  m
        logger.info("Checking if dir structure:{} exists", path);
        File file = new File(path);
        if (file.exists() && file.list().length > 0) {
            logger.debug("Found package structure:{} with {} files", path, file.list().length);
            exists = true;
        } else {
            logger.info("Package structure does not exist:" + path);
            exists = false;
        }
    }
    return exists;
}

From source file:com.magnet.mmx.server.plugin.mmxmgmt.util.PropertyChangeHandler.java

public static void handle(String property) {
    if (Strings.isNullOrEmpty(property)) {
        return;//from  w  w w  .j a  va 2s  . co  m
    }
    if (property.equals(MMXConfigKeys.MAX_XMPP_RATE)) {
        int rate = MMXConfiguration.getConfiguration().getInt(MMXConfigKeys.MAX_XMPP_RATE,
                MMXServerConstants.DEFAULT_MAX_XMPP_RATE);
        RateLimiterService.updateRates(MMXServerConstants.XMPP_RATE_TYPE, rate);
    } else if (property.equals(MMXConfigKeys.MAX_HTTP_RATE)) {
        int rate = MMXConfiguration.getConfiguration().getInt(MMXConfigKeys.MAX_HTTP_RATE,
                MMXServerConstants.DEFAULT_MAX_HTTP_RATE);
        RateLimiterService.updateRates(MMXServerConstants.HTTP_RATE_TYPE, rate);
    } else if (MMXConfigKeys.EXT_SERVICE_EVENT_GEO_SECRET.equals(property)) {
        // update the secret for geo component
        // TODO add proper Rest API to configure components
        try {
            String secret = MMXConfiguration.getConfiguration()
                    .getString(MMXConfigKeys.EXT_SERVICE_EVENT_GEO_SECRET);
            if (secret != null && secret.length() > 0) {
                ExternalComponentManager.setDefaultSecret(secret);
            }
        } catch (ModificationNotAllowedException e) {
            LOGGER.warn("failed to update secret for components.", e);
        }
    } else if (MMXConfigKeys.EXT_SERVICE_PORT.equals(property)) {
        // update the secret for geo component
        // TODO add proper Rest API to configure components
        try {
            String port = MMXConfiguration.getConfiguration().getString(MMXConfigKeys.EXT_SERVICE_PORT);
            if (port != null && port.length() > 0) {
                ExternalComponentManager.setServicePort(Integer.parseInt(port));
                XMPPServer.getInstance().getConnectionManager().enableComponentListener(true);
            }
        } catch (ModificationNotAllowedException e) {
            LOGGER.warn("failed to update port for components.", e);
        }
    } else if (MMXConfigKeys.EXT_SERVICE_ENABLED.equals(property)) {
        // enable or disable external component service
        boolean enabled = MMXConfiguration.getConfiguration().getBoolean(MMXConfigKeys.EXT_SERVICE_ENABLED,
                false);
        XMPPServer.getInstance().getConnectionManager().enableComponentListener(enabled);
    }
}

From source file:com.google.cloud.hadoop.util.ConfigurationUtil.java

/**
 * Gets value for the given key or throws if value is not found.
 *//*from w  ww  .j  a va  2 s  .  c  o m*/
public static String getMandatoryConfig(Configuration config, String key) throws IOException {
    String value = config.get(key);
    if (Strings.isNullOrEmpty(value)) {
        throw new IOException("Must supply a value for configuration setting: " + key);
    }
    return value;
}

From source file:org.glowroot.agent.GlowrootDir.java

public static File getGlowrootDir(@Nullable File glowrootJarFile) {
    String testDirPath = System.getProperty("glowroot.test.dir");
    if (!Strings.isNullOrEmpty(testDirPath)) {
        return new File(testDirPath);
    }/*w  ww .  jav a2  s .c o m*/
    if (glowrootJarFile == null) {
        throw new IllegalStateException(
                "Property glowroot.test.dir is required when running" + " tests with no glowroot jar file");
    }
    File glowrootDir = glowrootJarFile.getParentFile();
    if (glowrootDir == null) {
        // the file does not name a parent, so it must be current dir
        return new File(".");
    }
    return glowrootDir;
}

From source file:com.github.jcustenborder.kafka.connect.cdc.KafkaAssert.java

public static void assertField(final Field expected, final Field actual, String message) {
    String prefix = Strings.isNullOrEmpty(message) ? "" : message + ": ";
    if (null == expected) {
        assertNull(actual, prefix + "actual should be null.");
        return;//www  .ja  v a2 s.c o m
    }
    assertEquals(expected.name(), actual.name(), prefix + "name does not match");
    assertEquals(expected.index(), actual.index(), prefix + "name does not match");
    assertSchema(expected.schema(), actual.schema(), prefix + "schema does not match");
}

From source file:org.eclipse.buildship.core.util.collections.CollectionsUtils.java

/**
 * Splits the given string for each space that is found.
 *
 * @param string the string to split, can be null
 * @return the split string with each segment being an element of the returned list, never null
 *///from  ww w .j a va2 s.  c o  m
public static ImmutableList<String> splitBySpace(String string) {
    return Strings.isNullOrEmpty(string) ? ImmutableList.<String>of()
            : ImmutableList.copyOf(Splitter.on(SPACE).omitEmptyStrings().splitToList(string));
}

From source file:com.google.cloud.hadoop.gcsio.GoogleCloudStorageExceptions.java

/**
 * Creates FileNotFoundException with suitable message for a GCS bucket or object.
 *//*from  ww  w . j a va 2 s  . co  m*/
public static FileNotFoundException getFileNotFoundException(String bucketName, String objectName) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(bucketName), "bucketName must not be null or empty");
    if (objectName == null) {
        objectName = "";
    }
    return new FileNotFoundException(String.format("Item not found: %s/%s", bucketName, objectName));
}

From source file:com.google.devtools.moe.client.InvalidProject.java

public static void assertNotEmpty(String str, String message) throws InvalidProject {
    assertFalse(Strings.isNullOrEmpty(str), message);
}