Package com.landawn.abacus.util

Class If

java.lang.Object

com.landawn.abacus.util.If

@Beta
public final class If
extends Object

This class is mainly designed for functional programming. Generally the traditional "if-else" or ternary operator: "? : " is preferred over this class.

Author:

HaiYang Li

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	If.OrElse	The Class OrElse.

Method Summary

Modifier and Type	Method	Description
static If	exists(int index)	true for index >= 0, false for index < 0.
static If	is(boolean b)	Checks if is.
static If	isBlank(CharSequence s)	Checks if is null or empty or blank.
static If	isEmpty(boolean[] a)	Checks if is null or empty.
static If	isEmpty(byte[] a)	Checks if is null or empty.
static If	isEmpty(char[] a)	Checks if is null or empty.
static If	isEmpty(double[] a)	Checks if is null or empty.
static If	isEmpty(float[] a)	Checks if is null or empty.
static If	isEmpty(int[] a)	Checks if is null or empty.
static If	isEmpty(long[] a)	Checks if is null or empty.
static If	isEmpty(short[] a)	Checks if is null or empty.
static If	isEmpty(LongMultiset<?> s)	Checks if is null or empty.
static If	isEmpty(Multimap<?,?,?> m)	Checks if is null or empty.
static If	isEmpty(Multiset<?> s)	Checks if is null or empty.
static If	isEmpty(PrimitiveList list)	Checks if is null or empty.
static If	isEmpty(CharSequence s)	Checks if is null or empty.
static If	isEmpty(Object[] a)	Checks if is null or empty.
static If	isEmpty(Collection<?> c)	Checks if is null or empty.
static If	isEmpty(Map<?,?> m)	Checks if is null or empty.
static If	not(boolean b)
static If	notBlank(CharSequence s)	Not null or empty or blank.
static If	notEmpty(boolean[] a)	Not null or empty.
static If	notEmpty(byte[] a)	Not null or empty.
static If	notEmpty(char[] a)	Not null or empty.
static If	notEmpty(double[] a)	Not null or empty.
static If	notEmpty(float[] a)	Not null or empty.
static If	notEmpty(int[] a)	Not null or empty.
static If	notEmpty(long[] a)	Not null or empty.
static If	notEmpty(short[] a)	Not null or empty.
static If	notEmpty(LongMultiset<?> s)	Not null or empty.
static If	notEmpty(Multimap<?,?,?> m)	Not null or empty.
static If	notEmpty(Multiset<?> s)	Not null or empty.
static If	notEmpty(PrimitiveList list)	Not null or empty.
static If	notEmpty(CharSequence s)	Not null or empty.
static If	notEmpty(Object[] a)	Not null or empty.
static If	notEmpty(Collection<?> c)	Not null or empty.
static If	notEmpty(Map<?,?> m)	Not null or empty.
<E extends Throwable> If.OrElse	then(Throwables.Runnable<E> cmd)
<U, E extends Throwable> If.OrElse	then(U init, Throwables.Consumer<? super U,E> action)
If.OrElse	thenDoNothing()	Then do nothing.
<E extends Throwable> If.OrElse	thenThrow(Supplier<? extends E> exceptionSupplier)

Methods inherited from class java.lang.Object

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

Method Details

is

public static If is(boolean b)

Checks if is.

Parameters:

b -

Returns:

not

public static If not(boolean b)

Parameters:

b -

Returns:

exists

public static If exists(int index)

true for index >= 0, false for index < 0.

Parameters:

index -

Returns:

isEmpty

public static If isEmpty(CharSequence s)

Checks if is null or empty.

Parameters:

s -

Returns:

isEmpty

public static If isEmpty(boolean[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(char[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(byte[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(short[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(int[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(long[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(float[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(double[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(Object[] a)

Checks if is null or empty.

Parameters:

a -

Returns:

isEmpty

public static If isEmpty(Collection<?> c)

Checks if is null or empty.

Parameters:

c -

Returns:

isEmpty

public static If isEmpty(Map<?,?> m)

Checks if is null or empty.

Parameters:

m -

Returns:

isEmpty

public static If isEmpty(PrimitiveList list)

Checks if is null or empty.

Parameters:

list -

Returns:

isEmpty

public static If isEmpty(Multiset<?> s)

Checks if is null or empty.

Parameters:

s -

Returns:

isEmpty

public static If isEmpty(LongMultiset<?> s)

Checks if is null or empty.

Parameters:

s -

Returns:

isEmpty

public static If isEmpty(Multimap<?,?,?> m)

Checks if is null or empty.

Parameters:

m -

Returns:

isBlank

public static If isBlank(CharSequence s)

Checks if is null or empty or blank.

Parameters:

s -

Returns:

notEmpty

public static If notEmpty(CharSequence s)

Not null or empty.

Parameters:

s -

Returns:

notEmpty

public static If notEmpty(boolean[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(char[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(byte[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(short[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(int[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(long[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(float[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(double[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(Object[] a)

Not null or empty.

Parameters:

a -

Returns:

notEmpty

public static If notEmpty(Collection<?> c)

Not null or empty.

Parameters:

c -

Returns:

notEmpty

public static If notEmpty(Map<?,?> m)

Not null or empty.

Parameters:

m -

Returns:

notEmpty

public static If notEmpty(PrimitiveList list)

Not null or empty.

Parameters:

list -

Returns:

notEmpty

public static If notEmpty(Multiset<?> s)

Not null or empty.

Parameters:

s -

Returns:

notEmpty

public static If notEmpty(LongMultiset<?> s)

Not null or empty.

Parameters:

s -

Returns:

notEmpty

public static If notEmpty(Multimap<?,?,?> m)

Not null or empty.

Parameters:

m -

Returns:

notBlank

public static If notBlank(CharSequence s)

Not null or empty or blank.

Parameters:

s -

Returns:

thenDoNothing

public If.OrElse thenDoNothing()

Then do nothing.

Returns:

then

public <E extends Throwable> If.OrElse then(Throwables.Runnable<E> cmd)
                                     throws E

Type Parameters:

E -

Parameters:

cmd -

Returns:

Throws:

E - the e

then

public <U,
E extends Throwable> If.OrElse then(U init,
 Throwables.Consumer<? super U,E> action)
                                       throws E

Type Parameters:

U -

E -

Parameters:

init -

action -

Returns:

Throws:

E - the e

thenThrow

public <E extends Throwable> If.OrElse thenThrow(Supplier<? extends E> exceptionSupplier)
                                          throws E

Type Parameters:

E -

Parameters:

exceptionSupplier -

Returns:

Throws:

E - the e