org.kuali.common.jute.base

Class Optionals

java.lang.Object

org.kuali.common.jute.base.Optionals

public final class Optionals
extends Object

Method Summary

Methods

Modifier and Type	Method and Description
static int	countPresent(com.google.common.base.Optional<?>... optionals)
static long	fromAbsentToNegative(com.google.common.base.Optional<Long> optional) Returns -1 if optional.isPresent() == false, otherwise returns optional.get()
static long	fromAbsentToNegative(com.google.common.base.Optional<Long> optional, long negativeValue) Returns negativeValue if optional.isPresent() == false, otherwise returns optional.get()
static com.google.common.base.Optional<String>	fromEmptyToNull(String s) Returns Optional.absent() if Strings.emptyToNull(s) returns null, otherwise Optional.of(s)
static com.google.common.base.Optional<Integer>	fromMissingOrZeroToAbsent(String text)
static com.google.common.base.Optional<Double>	fromNegativeToAbsent(double value) Returns Optional.absent() if value < 0, otherwise Optional.of(value)
static com.google.common.base.Optional<Integer>	fromNegativeToAbsent(int value) Returns Optional.absent() if value < 0, otherwise Optional.of(value)
static com.google.common.base.Optional<Long>	fromNegativeToAbsent(long value) Returns Optional.absent() if value < 0, otherwise Optional.of(value)
static com.google.common.base.Optional<Long>	fromNullableDate(Date date) Returns Optional.absent() if date == null, otherwise Optional.of(date.getTime())
static com.google.common.base.Optional<Integer>	fromPositiveToPresent(int value) Returns Optional.of(value) if value > 0, otherwise Optional.absent()
static com.google.common.base.Optional<String>	fromTrimToNull(String s) Returns Optional.absent() if StringUtils.trimToNull(s) returns null, otherwise Optional.of(s)
static com.google.common.base.Optional<Integer>	fromZeroToAbsent(int value) Returns Optional.absent() if value == 0, otherwise Optional.of(value)
static <T> com.google.common.base.Predicate<com.google.common.base.Optional<T>>	isPresent()
static com.google.common.base.Optional<Integer>	optionalInteger(String text)
static <T> com.google.common.base.Function<com.google.common.base.Optional<T>,T>	to()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

to

public static <T> com.google.common.base.Function<com.google.common.base.Optional<T>,T> to()

isPresent

public static <T> com.google.common.base.Predicate<com.google.common.base.Optional<T>> isPresent()

optionalInteger

public static com.google.common.base.Optional<Integer> optionalInteger(String text)

fromMissingOrZeroToAbsent

public static com.google.common.base.Optional<Integer> fromMissingOrZeroToAbsent(String text)

countPresent

public static int countPresent(com.google.common.base.Optional<?>... optionals)

fromAbsentToNegative

public static long fromAbsentToNegative(com.google.common.base.Optional<Long> optional)

Returns -1 if optional.isPresent() == false, otherwise returns optional.get()

fromAbsentToNegative

public static long fromAbsentToNegative(com.google.common.base.Optional<Long> optional,
                        long negativeValue)

Returns negativeValue if optional.isPresent() == false, otherwise returns optional.get()

fromNegativeToAbsent

public static com.google.common.base.Optional<Double> fromNegativeToAbsent(double value)

Returns Optional.absent() if value < 0, otherwise Optional.of(value)

fromNegativeToAbsent

public static com.google.common.base.Optional<Long> fromNegativeToAbsent(long value)

Returns Optional.absent() if value < 0, otherwise Optional.of(value)

fromPositiveToPresent

public static com.google.common.base.Optional<Integer> fromPositiveToPresent(int value)

Returns Optional.of(value) if value > 0, otherwise Optional.absent()

fromZeroToAbsent

public static com.google.common.base.Optional<Integer> fromZeroToAbsent(int value)

Returns Optional.absent() if value == 0, otherwise Optional.of(value)

fromNegativeToAbsent

public static com.google.common.base.Optional<Integer> fromNegativeToAbsent(int value)

Returns Optional.absent() if value < 0, otherwise Optional.of(value)

fromNullableDate

public static com.google.common.base.Optional<Long> fromNullableDate(Date date)

Returns Optional.absent() if date == null, otherwise Optional.of(date.getTime())

fromTrimToNull

public static com.google.common.base.Optional<String> fromTrimToNull(String s)

Returns Optional.absent() if StringUtils.trimToNull(s) returns null, otherwise Optional.of(s)

fromEmptyToNull

public static com.google.common.base.Optional<String> fromEmptyToNull(String s)

Returns Optional.absent() if Strings.emptyToNull(s) returns null, otherwise Optional.of(s)