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.talvish.tales.parts.naming.NameManager.java

/**
 * Returns the requested validator.//from w  ww .  ja  v  a  2 s.  c  o  m
 * @param theArea the area representing the validator to get
 * @return the requested validator or null if not found
 */
public static NameValidator getValidator(String theArea) {
    Conditions.checkParameter(!Strings.isNullOrEmpty(theArea), "theArea", "area was not given");
    return validators.get(theArea);
}

From source file:org.kegbot.app.util.DeviceId.java

/**
 * Generates and returns a unique device id.
 *
 * @param context//from w  ww  .j a va 2s.co m
 * @return
 */
public static String getDeviceId(Context context) {
    final MessageDigest md;
    try {
        md = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException();
    }

    final String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);

    if (!Strings.isNullOrEmpty(androidId)) {
        md.update(androidId.getBytes());
    } else {
        final Random random = new Random();
        byte randBytes[] = new byte[16];
        random.nextBytes(randBytes);
        md.update(randBytes);
    }

    final byte[] digest = md.digest();
    final byte[] shortDigest = Arrays.copyOfRange(digest, 0, 8);

    final String id = HexDump.toHexString(shortDigest);
    return id;
}

From source file:de.compeople.commons.net.proxy.ManualProxySelectorProvider.java

/**
 * Append a manual proxy selector to the CompoundProxySelector
 * /*  w  w w .ja v a  2 s.  c o m*/
 * @param compoundProxySelector
 */
public static void appendTo(CompoundProxySelector compoundProxySelector) {
    String proxyList = System.getProperty(MANUAL_PROXY_SETTINGS_PROPERTY);
    if (!Strings.isNullOrEmpty(proxyList)) {
        List<Proxy> universalProxies = new ArrayList<Proxy>();
        Map<String, List<Proxy>> protocolSpecificProxies = new HashMap<String, List<Proxy>>();

        if (!proxyList.equalsIgnoreCase(DIRECT)) {
            // if not direct requested fill the list from the spec.
            ProxySelectorUtils.fillProxyLists(proxyList, universalProxies, protocolSpecificProxies);
        }

        ManualProxySelector manualProxySelector = new ManualProxySelector(universalProxies,
                protocolSpecificProxies);

        compoundProxySelector.addOrReplace(100, manualProxySelector);
    } else {
        log.debug("No manual proxy (-D{}=... )selector requested.", MANUAL_PROXY_SETTINGS_PROPERTY);
    }
}

From source file:org.erlide.util.erlang.TermParser.java

protected static OtpErlangObject doParse(final String s) throws TermParserException {
    if (Strings.isNullOrEmpty(s)) {
        return null;
    }//  ww w  .  j av  a2  s  .c  o  m
    return parse(scan(s));
}

From source file:com.microsoft.applicationinsights.internal.util.MapUtil.java

public static <Value> void copy(Map<String, Value> source, Map<String, Value> target) {
    for (Map.Entry<String, Value> entry : source.entrySet()) {
        String key = entry.getKey();
        if (Strings.isNullOrEmpty(key)) {
            continue;
        }//from w  w w .  j a  va2  s.  c o m

        if (!target.containsKey(key)) {
            target.put(key, entry.getValue());
        }
    }
}

From source file:com.google.devtools.kythe.extractors.shared.IndexInfoUtils.java

public static CompilationDescription readIndexInfoFromFile(String indexInfoFilename) throws IOException {
    checkArgument(!Strings.isNullOrEmpty(indexInfoFilename), "indexInfoFilename");

    InputStream indexInfoInputStream = new GZIPInputStream(new FileInputStream(indexInfoFilename));
    try {/*ww w .  j  av a 2s.  co  m*/
        return readIndexInfoFromStream(indexInfoInputStream);
    } finally {
        indexInfoInputStream.close();
    }
}

From source file:org.erlide.util.erlang.OtpParser.java

protected static OtpErlangObject doParse(final String s) throws OtpParserException {
    if (Strings.isNullOrEmpty(s)) {
        return null;
    }//from  ww w  .j a v  a 2s.c o m
    return OtpParser.parse(OtpParser.scan(s));
}

From source file:com.dssmp.watch.util.RequestUtil.java

/**
 * ??String//from ww w. java2s. c  om
 *
 * @param request
 * @param parameter
 * @param defau
 * @return
 */
public static String getString(HttpServletRequest request, String parameter, String defau) {
    String defaultValue = request.getParameter(parameter);
    if (Strings.isNullOrEmpty(defaultValue))
        return defau;
    return defaultValue;
}

From source file:qa.qcri.nadeef.web.sql.SQLUtil.java

public static boolean isValidInteger(String s) {
    boolean isGood = true;
    if (!Strings.isNullOrEmpty(s)) {
        try {/*from   w  w w.j a  v a 2 s .c o  m*/
            int ignore = Integer.parseInt(s);
        } catch (Exception ex) {
            isGood = false;
        }
    }
    return isGood;
}

From source file:org.wisdom.framework.osgi.Clauses.java

/**
 * Standard OSGi header parser. This parser can handle the format:
 * <ul>/*from w  w  w .j  a v  a  2 s .co m*/
 * <li>clauses ::= clause ( ',' clause ) +</li>
 * <li>clause ::= name ( ';' name ) (';' key '=' value )</li>
 * </ul>
 * <p>
 * The return structure is a Map of Map: <code>Map {name => Map {attribute | directive} => value}</code>.
 *
 * @param header the header to parse
 * @return the clauses
 */
static public Clauses parse(String header) {
    if (Strings.isNullOrEmpty(header)) {
        return new Clauses();
    }

    Clauses result = new Clauses();
    QuotedTokenizer qt = new QuotedTokenizer(header, ";=,");
    char del;
    do {
        boolean hadAttribute = false;
        Map<String, String> clause = new LinkedHashMap<>();
        List<String> aliases = new ArrayList<String>();
        aliases.add(qt.nextToken());
        del = qt.getSeparator();
        while (del == ';') {
            String name = qt.nextToken();
            if ((del = qt.getSeparator()) != '=') {
                // Found an ; or , - it's valid if we didn't find an attribute.
                if (hadAttribute) {
                    throw new IllegalArgumentException("Header contains name field after "
                            + "attribute or directive: " + name + " from " + header);
                }
                aliases.add(name);
            } else {
                // Parse attribute or directive.
                String value = qt.nextToken();
                clause.put(name, value);
                del = qt.getSeparator();
                hadAttribute = true;
            }
        }
        for (String packageName : aliases) {
            if (result.containsKey(packageName)) {
                LOGGER.warn("Duplicate package name in header: " + packageName
                        + ". Multiple package names in one clause are supported.");
            } else {
                result.put(packageName, clause);
            }
        }
    } while (del == ',');
    return result;
}