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:org.impressivecode.depress.matcher.syntacticanalysis.Configuration.java

public Configuration(final SettingsModelString regExpKeywords, final SettingsModelString keywords,
        final SettingsModelString onlyIds) {

    if (emptyToNull(regExpKeywords.getStringValue()) != null) {
        this.keywordsRegexp = Optional.of(Pattern.compile(regExpKeywords.getStringValue()));
    } else {/*from   w  ww. j a v a2 s.  c o  m*/
        this.keywordsRegexp = Optional.absent();
    }
    if (emptyToNull(keywords.getStringValue()) != null) {
        Set<String> set = Sets.newHashSet(keywords.getStringValue().split(","));
        this.keywords = Optional.of(set);
    } else {
        this.keywords = Optional.absent();
    }

    if (emptyToNull(onlyIds.getStringValue()) != null) {
        this.onlyNumbers = Optional.of(Pattern.compile(onlyIds.getStringValue(), Pattern.MULTILINE));
    } else {
        this.onlyNumbers = Optional.absent();
    }
}

From source file:org.opendaylight.controller.cluster.datastore.persisted.DeletedDataTreeCandidateNode.java

@Override
public final Optional<NormalizedNode<?, ?>> getDataAfter() {
    return Optional.absent();
}

From source file:org.opendaylight.yangtools.yang.data.operations.LeafNodeModification.java

@Override
public Optional<LeafNode<?>> modify(LeafSchemaNode schema, Optional<LeafNode<?>> actualNode,
        Optional<LeafNode<?>> modificationNode, OperationStack operationStack)
        throws DataModificationException {

    operationStack.enteringNode(modificationNode);

    Optional<LeafNode<?>> result;

    // Returns either actual node, modification node or empty in case of removal
    switch (operationStack.getCurrentOperation()) {
    case MERGE: {
        result = modificationNode.isPresent() ? modificationNode : actualNode;
        break;/*  w  w  w . j a  v  a  2  s . c  o  m*/
    }
    case CREATE: {
        DataModificationException.DataExistsException.check(schema.getQName(), actualNode, null);
    }
    case REPLACE: {
        result = modificationNode;
        break;
    }
    case DELETE: {
        DataModificationException.DataMissingException.check(schema.getQName(), actualNode);
    }
    case REMOVE: {
        result = Optional.absent();
        break;
    }
    case NONE: {
        result = actualNode;
        break;
    }
    default:
        throw new UnsupportedOperationException(String.format("Unable to perform operation: %s on: %s, unknown",
                operationStack.getCurrentOperation(), schema));

    }

    operationStack.exitingNode(modificationNode);

    return result;
}

From source file:io.crate.sql.tree.CreateSnapshot.java

public CreateSnapshot(QualifiedName name, @Nullable GenericProperties genericProperties) {
    this.name = name;
    this.properties = Optional.fromNullable(genericProperties);
    this.tableList = Optional.absent();

}

From source file:org.eclipse.buildship.ui.view.task.TaskNodeSelectionUtils.java

/**
 * Tries to map the given selection to a Gradle run configuration.
 *
 * @param selection the selection to map
 * @return the mapped run configuration, if possible
 *//*from   ww w .j av  a2  s  . c  o m*/
public static Optional<GradleRunConfigurationAttributes> tryGetRunConfigurationAttributes(
        NodeSelection selection) {
    if (isValidRunConfiguration(selection)) {
        return Optional.of(getRunConfigurationAttributes(selection));
    } else {
        return Optional.absent();
    }
}

From source file:io.crate.sql.tree.RestoreSnapshot.java

public RestoreSnapshot(QualifiedName name, @Nullable GenericProperties genericProperties) {
    this.name = name;
    this.properties = Optional.fromNullable(genericProperties);
    this.tableList = Optional.absent();

}

From source file:com.facebook.buck.apple.xcode.xcodeproj.PBXBuildFile.java

public PBXBuildFile(PBXReference fileRef) {
    this.fileRef = Preconditions.checkNotNull(fileRef);
    this.settings = Optional.absent();
}

From source file:com.tinspx.util.base.Base.java

/**
 * Attempts to parse the integer if is an Integer, Number, or CharSequence
 *///from  w w w.j av  a 2 s .  c o m
public static Optional<Integer> parseInt(@Nullable Object o) {
    if (o instanceof Integer) {
        return Optional.of((Integer) o);
    } else if (o instanceof Number) {
        return Optional.of(((Number) o).intValue());
    } else if (o instanceof CharSequence) {
        return Optional.fromNullable(Ints.tryParse(o.toString()));
    } else {
        return Optional.absent();
    }
}

From source file:se.sics.ktoolbox.croupier.behaviour.CroupierObserver.java

@Override
public Optional<View> getView() {
    return Optional.absent();
}

From source file:com.dowdandassociates.gentoo.bootstrap.JSchProvider.java

public Optional<JSch> get() {
    log.info("Get JSch");
    try {//from  w w w .  j a va2 s .  c  o m
        JSch jsch = new JSch();

        jsch.addIdentity(keyPair.getFilename());

        return Optional.of(jsch);
    } catch (JSchException jse) {
        log.error(jse.getMessage(), jse);
        return Optional.absent();
    }
}