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.github.jcustenborder.kafka.connect.cdc.Assertions.java

public static void assertField(final Field expected, final Field actual, String message) {
    String prefix = Strings.isNullOrEmpty(message) ? "" : message + ": ";
    assertNotNull(expected, prefix + "expected field should not be null.");
    assertNotNull(actual, prefix + "actual field should not be null.");
    assertSchema(expected.schema(), actual.schema(),
            "schema for field " + expected.name() + " does not match.");
}

From source file:dk.dma.ais.abnormal.util.AisDataHelper.java

/**
 * Trim AIS string to Java String by converting all '@'s to spaces, and then
 * trimming all leading and trailing spaces away.
 *
 * @param name//from  w w w  .  j av  a 2 s .  c  o  m
 * @return
 */
public static String trimAisString(String name) {
    if (!Strings.isNullOrEmpty(name)) {
        name = name.replace('@', ' ').trim();
    } else {
        name = "";
    }
    return name;
}

From source file:uk.co.bubblebearapps.samplebot.HexValidator.java

/**
 * Validate hex with regular expression/* w  ww.j  av a  2 s.  c o  m*/
 *
 * @param hex hex for validation
 * @return true valid hex, false invalid hex
 */
public static boolean validate(final String hex) {

    if (Strings.isNullOrEmpty(hex)) {
        return false;
    }

    Matcher matcher = pattern.matcher(hex);
    return matcher.matches();

}

From source file:org.opendaylight.netconf.sal.restconf.impl.QueryParametersParser.java

public static WriterParameters parseWriterParameters(final UriInfo info) {
    WriterParameters.WriterParametersBuilder wpBuilder = new WriterParameters.WriterParametersBuilder();
    if (info == null) {
        return wpBuilder.build();
    }//  ww w.java2s  . c o m

    String param = info.getQueryParameters(false).getFirst(UriParameters.DEPTH.toString());
    if (!Strings.isNullOrEmpty(param) && !"unbounded".equals(param)) {
        try {
            final int depth = Integer.valueOf(param);
            if (depth < 1) {
                throw new RestconfDocumentedException(new RestconfError(RestconfError.ErrorType.PROTOCOL,
                        RestconfError.ErrorTag.INVALID_VALUE, "Invalid depth parameter: " + depth, null,
                        "The depth parameter must be an integer > 1 or \"unbounded\""));
            }
            wpBuilder.setDepth(depth);
        } catch (final NumberFormatException e) {
            throw new RestconfDocumentedException(new RestconfError(RestconfError.ErrorType.PROTOCOL,
                    RestconfError.ErrorTag.INVALID_VALUE, "Invalid depth parameter: " + e.getMessage(), null,
                    "The depth parameter must be an integer > 1 or \"unbounded\""));
        }
    }
    param = info.getQueryParameters(false).getFirst(UriParameters.PRETTY_PRINT.toString());
    wpBuilder.setPrettyPrint("true".equals(param));
    return wpBuilder.build();
}

From source file:com.infinities.keystone4j.utils.TextUtils.java

public static String get(String target, String defaultVal) {
    if (Strings.isNullOrEmpty(target)) {
        return defaultVal;
    }//from w  w  w .  jav  a 2  s. c  o  m
    return target;
}

From source file:com.haulmont.cuba.gui.components.SizeUnit.java

public static SizeUnit getUnitFromSymbol(String symbol) {
    if (Strings.isNullOrEmpty(symbol)) {
        return SizeUnit.PIXELS; // Defaults to pixels
    }//ww  w . ja v  a2  s.com

    for (SizeUnit unit : SizeUnit.values()) {
        if (symbol.equals(unit.getSymbol())) {
            return unit;
        }
    }

    throw new IllegalArgumentException("Passed symbol cannot be recognized as known SizeUnit");
}

From source file:de.aikiit.jmockex.OccurrenceFinder.java

public static boolean containsExactlyTimes(int times, String source, String marker) {
    if (Strings.isNullOrEmpty(source) || Strings.isNullOrEmpty(marker)) {
        throw new IllegalArgumentException("No null arguments allowed");
    }//from w  w  w  .ja v  a2s . c  o m
    return times == ((source.length() - source.replace(marker, "").length()) / marker.length());
}

From source file:com.cloudant.sync.util.CouchUtils.java

public static boolean isValidDocumentId(String docId) {
    // http://wiki.apache.org/couch/HTTP_Document_API#Documents
    if (Strings.isNullOrEmpty(docId)) {
        return false;
    }//from  w  w w  .j  a  v a 2  s .c  o  m

    if (docId.charAt(0) == '_') {
        return (docId.startsWith("_design/") || docId.startsWith("_local/"));
    }

    return true;
}

From source file:org.dbunitng.util.PropertyUtil.java

/**
 * Java Beans?????//from   ww  w. j  a  v  a  2 s  .  com
 * 
 * <pre>
 * decapitalizePropertyName(&quot;FirstName&quot;) = &quot;firstName&quot;
 * decapitalizePropertyName(&quot;AName&quot;) = &quot;AName&quot;
 * </pre>
 * 
 * @param name
 * @return ??
 */
public static String decapitalizePropertyName(String name) {
    if (Strings.isNullOrEmpty(name)) {
        return name;
    }
    if (name.length() > 1 && Character.isUpperCase(name.charAt(1)) && Character.isUpperCase(name.charAt(0))) {

        return name;
    }
    char chars[] = name.toCharArray();
    chars[0] = Character.toLowerCase(chars[0]);
    return new String(chars);
}

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

public static Optional<PkgScreenshot> tryGetByCode(ObjectContext context, String code) {
    Preconditions.checkArgument(null != context, "the context must be supplied");
    Preconditions.checkArgument(!Strings.isNullOrEmpty(code), "the code must be supplied");
    return Optional.ofNullable(ObjectSelect.query(PkgScreenshot.class).where(CODE.eq(code)).selectOne(context));
}