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.imsglobal.caliper.validators.SensorValidator.java

/**
 * Check if Sensor identifier is null or empty.
 * @param id/*w w w  .  j  av  a 2 s  .  c o  m*/
 * @throws IllegalArgumentException
 */
public static void checkSensorId(String id) throws IllegalArgumentException {
    checkArgument(!(Strings.isNullOrEmpty(id)), "Sensor identifier must be specified");
}

From source file:com.codeabovelab.dm.common.kv.KvUtils.java

/**
 * Utility which correct join path components. <p/>
 * Accept any '/component/' with or without '/' at ends and join they in correct '/component1/component2/.../componentN/' path.
 * @param components//  www.j  a  va  2  s  . c om
 * @return
 */
public static String join(String... components) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < components.length; ++i) {
        String component = components[i];
        if (Strings.isNullOrEmpty(component)) {
            throw new IllegalArgumentException(
                    "Null or empty component at " + i + " in " + Arrays.toString(components));
        }
        final int lastChar = sb.length() - 1;
        if (component.charAt(0) != '/' && (lastChar < 0 || sb.charAt(lastChar) != '/')) {
            sb.append('/');
        }
        sb.append(component);
    }
    if (sb.length() > 0 && sb.charAt(sb.length() - 1) != '/') {
        sb.append('/');
    }
    return sb.toString();
}

From source file:org.apache.isis.core.progmodel.facets.object.encodeable.EncoderDecoderUtil.java

static String encoderDecoderNameFromConfiguration(final Class<?> type, final IsisConfiguration configuration) {
    final String key = ENCODER_DECODER_NAME_KEY_PREFIX + type.getCanonicalName()
            + ENCODER_DECODER_NAME_KEY_SUFFIX;
    final String encoderDecoderName = configuration.getString(key);
    return !Strings.isNullOrEmpty(encoderDecoderName) ? encoderDecoderName : null;
}

From source file:th.co.geniustree.intenship.advisor.validator.MobileUniqueValidator.java

@Override
public boolean isValid(String value, ConstraintValidatorContext context) {

    if (Strings.isNullOrEmpty(value)) {
        return true;
    }/*from ww  w  .j av a  2s .  c o m*/
    return studentRepo.findByMobileIgnoreCase(value) == null;
}

From source file:th.co.geniustree.dental.angular.validator.MobileUniqueValidator.java

@Override
public boolean isValid(String value, ConstraintValidatorContext context) {

    if (Strings.isNullOrEmpty(value)) {
        return true;
    }//  w w w .j a  v  a 2 s.  c o m
    return customerRepo.findByMobileIgnoreCase(value) == null;
}

From source file:org.opendaylight.groupbasedpolicy.neutron.mapper.util.Utils.java

/**
 * This implementation does not use nameservice lookups (e.g. no DNS).
 *
 * @param cidr - format must be valid for regex in {@link Ipv4Prefix} or {@link Ipv6Prefix}
 * @return the {@link IpPrefix} having the given cidr string representation
 * @throws IllegalArgumentException - if the argument is not a valid CIDR string
 *//*w w w  . ja va2 s  .c o  m*/
public static IpPrefix createIpPrefix(String cidr) {
    checkArgument(!Strings.isNullOrEmpty(cidr), "Cannot be null or empty.");
    String[] ipAndPrefix = cidr.split("/");
    checkArgument(ipAndPrefix.length == 2, "Bad format.");
    InetAddress ip = InetAddresses.forString(ipAndPrefix[0]);
    if (ip instanceof Inet4Address) {
        return new IpPrefix(new Ipv4Prefix(cidr));
    }
    return new IpPrefix(new Ipv6Prefix(cidr));
}

From source file:intelligent.wiki.editor.io_impl.wiki.template_data.TemplateParameterBuilder.java

/**
 * Start point of template parameter creation. Note, that it is necessary
 * to set parameter name, so {@link IllegalArgumentException} will be
 * thrown if method argument is <code>null</code> or empty.
 *
 * @param name name of template parameter
 * @return builder object//from  w w w.j  a  v a  2s . c o m
 * @throws IllegalArgumentException if parameter is null or empty
 */
public static TemplateParameterBuilder parameterWithName(String name) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(name));

    TemplateParameterBuilder builder = new TemplateParameterBuilder();
    builder.name = name;
    return builder;
}

From source file:org.sonar.db.purge.period.KeepWithVersionFilter.java

private static boolean isDeletable(PurgeableAnalysisDto snapshot) {
    return !snapshot.isLast() && Strings.isNullOrEmpty(snapshot.getVersion());
}

From source file:com.google.api.tools.framework.snippet.Values.java

/**
 * Determines whether a value is 'true', where true is interpreted depending on the values
 * type.//  w  w  w. ja va  2s . co m
 */
@SuppressWarnings("rawtypes")
static boolean isTrue(Object v1) {
    if (v1 instanceof Number) {
        // For numbers, compare with  the default value (zero), which we obtain by
        // creating an array.
        return !Array.get(Array.newInstance(Primitives.unwrap(v1.getClass()), 1), 0).equals(v1);
    }
    if (v1 instanceof Boolean) {
        return (Boolean) v1;
    }
    if (v1 instanceof Doc) {
        return !((Doc) v1).isWhitespace();
    }
    if (v1 instanceof String) {
        return !Strings.isNullOrEmpty((String) v1);
    }
    if (v1 instanceof Iterable) {
        return ((Iterable) v1).iterator().hasNext();
    }
    return false;
}

From source file:org.apache.kylin.metrics.property.JobPropertyEnum.java

public static JobPropertyEnum getByName(String name) {
    if (Strings.isNullOrEmpty(name)) {
        return null;
    }/*from   ww w .  j  a  va  2s .c om*/
    for (JobPropertyEnum property : JobPropertyEnum.values()) {
        if (property.propertyName.equals(name.toUpperCase())) {
            return property;
        }
    }

    return null;
}