Example usage for com.google.common.base Optional absent

Introduction

In this page you can find the example usage for com.google.common.base Optional absent.

Prototype

public static <T> Optional<T> absent()

Source Link

Document

Returns an Optional instance with no contained reference.

Usage

From source file:com.facebook.buck.apple.AppleInfoPlistParsing.java

/**
 * Extracts the bundle ID (CFBundleIdentifier) from an Info.plist, returning it if present.
 *///from w ww  . j  a  v a 2  s  . co  m
public static Optional<String> getBundleIdFromPlistStream(InputStream inputStream) throws IOException {
    NSDictionary infoPlist;
    try (BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream)) {
        try {
            infoPlist = (NSDictionary) PropertyListParser.parse(bufferedInputStream);
        } catch (Exception e) {
            throw new IOException(e);
        }
    }
    NSObject bundleId = infoPlist.objectForKey("CFBundleIdentifier");
    if (bundleId == null) {
        return Optional.absent();
    } else {
        return Optional.of(bundleId.toString());
    }
}

From source file:com.google.gerrit.server.notedb.rebuild.StatusChangeEvent.java

static Optional<StatusChangeEvent> parseFromMessage(ChangeMessage message, Change change, Change noteDbChange) {
    String msg = message.getMessage();
    if (msg == null) {
        return Optional.absent();
    }//from  w  w w .j  a  v  a2  s .com
    for (Map.Entry<Change.Status, Pattern> e : PATTERNS.entrySet()) {
        if (e.getValue().matcher(msg).matches()) {
            return Optional.of(new StatusChangeEvent(message, change, noteDbChange, e.getKey()));
        }
    }
    return Optional.absent();
}

From source file:org.fabrician.enabler.util.BuildCmdOptions.java

public static Optional<String> build(RuntimeContextVariable var) {
    try {/*from w w  w.  ja v a2 s  .c o  m*/
        BuildCmdOptions val = valueOf(var.getName());
        if (var.getTypeInt() != RuntimeContextVariable.OBJECT_TYPE) {
            String currentValue = StringUtils.trimToEmpty((String) var.getValue());
            // empty value means the option is not valid and would be skipped
            // so that we accept the default
            if (!currentValue.isEmpty()) {
                if (val.isBooleanType) {
                    Boolean b = BooleanUtils.toBooleanObject(currentValue);
                    if (b != val.defaultBooleanValue) {
                        return Optional.of(" " + val.optionSwitch + " ");
                    }
                } else {
                    return Optional.of(" " + val.optionSwitch + " " + currentValue);
                }
            }
        }

    } catch (Exception ex) {

    }
    return Optional.absent();
}

From source file:io.urmia.util.ArgumentParseUtil.java

static Optional<String> getArgument(String[] args, String shortName, String longName) {
    int i = 0;//from   w  w  w.j a v a 2 s .  c o m

    while (i < args.length && args[i].startsWith("-")) {
        String arg = args[i++];

        if (arg.equals(shortName) || arg.equals(longName))
            if (i < args.length)
                return Optional.fromNullable(args[i]);
    }

    return Optional.absent();
}

From source file:ru.org.linux.tracker.TrackerFilterEnum.java

public static Optional<TrackerFilterEnum> getByValue(String filterAction) {
    if (valuesSet.contains(filterAction)) {
        return Optional.of(TrackerFilterEnum.valueOf(filterAction.toUpperCase()));
    } else {// w  w w  .j  a va  2  s . c  o m
        return Optional.absent();
    }
}

From source file:org.jclouds.aws.filters.FormSignerUtils.java

/**
 * Get the version from a @ApiVersionOverride() annotation on an API method or its owning class.
 * @param request The API request for the method.
 * @return An optional of the value of the annotation.
 *///from  w w  w  . j ava  2s  .c  o m
public static Optional<String> getAnnotatedApiVersion(HttpRequest request) {
    if (request instanceof GeneratedHttpRequest) {
        GeneratedHttpRequest generatedRequest = (GeneratedHttpRequest) request;
        return getAnnotatedApiVersion(generatedRequest.getInvocation());
    } else {
        return Optional.absent();
    }
}

From source file:org.eclipse.recommenders.utils.rcp.UUIDHelper.java

private static Optional<String> lookupUUIDFromStore() {
    final RecommendersUtilsPlugin plugin = RecommendersUtilsPlugin.getDefault();
    final IPreferenceStore prefStore = plugin.getPreferenceStore();
    final String uuid = prefStore.getString(PreferencesInitalizer.PROP_UUID);
    if (Strings.isNullOrEmpty(uuid)) {
        return Optional.absent();
    }// w  w  w.  j av  a 2 s  . c  om
    return Optional.fromNullable(uuid);
}

From source file:org.sonar.server.permission.ws.WsProjectRef.java

public static Optional<WsProjectRef> newOptionalWsProjectRef(@Nullable String uuid, @Nullable String key) {
    if (uuid == null && key == null) {
        return Optional.absent();
    }/*from w ww.  ja v  a  2s  . c  om*/

    return Optional.of(new WsProjectRef(uuid, key));
}

From source file:org.apache.distributedlog.util.CommandLineUtils.java

public static Optional<Integer> getOptionalIntegerArg(CommandLine cmdline, String arg)
        throws IllegalArgumentException {
    try {//from www  . ja v a  2  s.  c  om
        if (cmdline.hasOption(arg)) {
            return Optional.of(Integer.parseInt(cmdline.getOptionValue(arg)));
        } else {
            return Optional.absent();
        }
    } catch (NumberFormatException ex) {
        throw new IllegalArgumentException(arg + " is not a number");
    }
}

From source file:im.dadoo.cas.server.service.SignService.java

public Optional<User> signin(String name, String password) {
    Optional<User> user = this.userDao.findByName(name);
    if (user.isPresent() && user.get().getPassword().equals(password)) {
        return user;
    } else {//from   w ww.  ja  va2s. c o  m
        return Optional.absent();
    }
}