Example usage for java.util Optional of

Introduction

In this page you can find the example usage for java.util Optional of.

Prototype

public static <T> Optional<T> of(T value)

Source Link

Document

Returns an Optional describing the given non- null value.

Usage

From source file:Main.java

/** Given a parent element, locate string value of a child node.
 *  @param parent Parent element//from w  ww  . j  ava2s.  co  m
 *  @param name Name of child element
 *  @return Value of child element, or empty result
 */
public static Optional<String> getChildString(final Element parent, final String name) {
    final Element child = getChildElement(parent, name);
    if (child != null)
        return Optional.of(getString(child));
    else
        return Optional.empty();
}

From source file:com.teradata.tempto.fulfillment.table.DatabaseSelectionContext.java

public static DatabaseSelectionContext forDatabaseName(String databaseName) {
    return new DatabaseSelectionContext(Optional.of(databaseName), Optional.empty());
}

From source file:org.zalando.riptide.Conditions.java

public static <A> UntypedCondition<A> on(final A attribute) {
    return new UntypedCondition<>(Optional.of(attribute));
}

From source file:io.pravega.controller.store.stream.tables.IndexRecord.java

public static Optional<IndexRecord> readRecord(final byte[] indexTable, final int offset) {
    if (offset >= indexTable.length) {
        return Optional.empty();
    } else {/*from  ww  w  .  ja v  a  2 s  .c  om*/
        return Optional.of(parse(indexTable, offset));
    }
}

From source file:Main.java

/** Given a parent element, locate double value of a child node.
 *  @param parent Parent element/*from   w w w. ja  va  2s. co  m*/
 *  @param name Name of child element
 *  @return Value of child element, or empty result
 *  @throws Exception on error parsing the number
 */
public static Optional<Double> getChildDouble(final Element parent, final String name) throws Exception {
    final Element child = getChildElement(parent, name);
    if (child == null)
        return Optional.empty();
    try {
        return Optional.of(Double.valueOf(getString(child)));
    } catch (NumberFormatException ex) {
        throw new Exception("Expected double for <" + name + ">", ex);
    }
}

From source file:Main.java

/** Given a parent element, locate integer value of a child node.
 *  @param parent Parent element/*from   w w w. j a v a  2 s  . co  m*/
 *  @param name Name of child element
 *  @return Value of child element, or empty result
 *  @throws Exception on error parsing the number
 */
public static Optional<Integer> getChildInteger(final Element parent, final String name) throws Exception {
    final Element child = getChildElement(parent, name);
    if (child == null)
        return Optional.empty();
    try {
        return Optional.of(Integer.valueOf(getString(child)));
    } catch (NumberFormatException ex) {
        throw new Exception("Expected integer for <" + name + ">", ex);
    }
}

From source file:com.thoughtworks.go.config.rules.DirectiveType.java

public static Optional<DirectiveType> fromString(String directive) {
    if (StringUtils.isBlank(directive)) {
        return Optional.empty();
    }//  w  ww . ja  v  a 2s. com

    switch (directive) {
    case "allow":
        return Optional.of(ALLOW);
    case "deny":
        return Optional.of(DENY);
    default:
        return Optional.empty();
    }
}

From source file:com.synopsys.integration.blackduck.service.model.BlackDuckQuery.java

public static Optional<BlackDuckQuery> createQuery(final String parameter) {
    if (StringUtils.isNotBlank(parameter)) {
        return Optional.of(new BlackDuckQuery(parameter));
    }/*www .  java 2s .c om*/

    return Optional.empty();
}

From source file:com.liferay.blade.cli.util.Prompter.java

public static boolean confirm(String question, boolean defaultAnswer) {
    return confirm(question, System.in, System.out, Optional.of(defaultAnswer));
}

From source file:com.teradata.tempto.internal.convention.TableName.java

public static TableName parse(String value) {
    if (value.contains(".")) {
        List<String> parts = Splitter.on('.').splitToList(value);
        checkState(parts.size() == 2,/*from   w ww  .  ja v a  2 s .c  o  m*/
                "Invalid table name syntax. Expected at most one occurrence of '.' in '%s'.", value);
        return new TableName(parts.get(1), Optional.of(parts.get(0)));
    } else {
        return new TableName(value, Optional.empty());
    }
}