Package org.cactoos.scalar

Class And

java.lang.Object

org.cactoos.scalar.And

All Implemented Interfaces:

Scalar<Boolean>

public final class And
extends Object
implements Scalar<Boolean>

Logical conjunction. This class performs short-circuit evaluation in which arguments are executed only if the preceding argument does not suffice to determine the value of the expression.

This class could be also used for matching multiple boolean expressions:

new And( new True(), new True(), new True() ).value(); // the result is true new And( new True(), new False(), new True() ).value(); // the result is false

This class implements Scalar, which throws a checked Exception. This may not be convenient in many cases. To make it more convenient and get rid of the checked exception you can use the Unchecked decorator. Or you may use IoChecked to wrap it in an IOException.

There is no thread-safety guarantee.

Since:

0.8

See Also:

Unchecked, IoChecked

Constructor Summary

Constructors

Constructor	Description
And(Iterable<? extends Scalar<Boolean>> iterable)	Ctor.
And(Func<? super X,Boolean> func, Iterable<? extends X> src)	Ctor.
And(Func<? super X,Boolean> func, X... src)	Ctor.
And(Scalar<Boolean>... scalar)	Ctor.
And(X subject, Iterable<? extends Func<? super X,Boolean>> conditions)	Ctor.
And(X subject, Func<? super X,Boolean>... conditions)	Ctor.

Method Summary

Modifier and Type	Method	Description
Boolean	value()	Convert it to the value.

Methods inherited from class java.lang.Object

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

Constructor Detail

And

@SafeVarargs
public And(Func<? super X,Boolean> func,
           X... src)

Ctor.

Type Parameters:

X - Type of items in the iterable

Parameters:

func - Func to map

src - The iterable

And

public And(Func<? super X,Boolean> func,
           Iterable<? extends X> src)

Ctor.

Type Parameters:

X - Type of items in the iterable

Parameters:

func - Func to map

src - The iterable

Since:

0.24

And

@SafeVarargs
public And(X subject,
           Func<? super X,Boolean>... conditions)

Ctor.

Type Parameters:

X - Type of items in the iterable

Parameters:

subject - The subject

conditions - Funcs to map

Since:

0.34

And

public And(X subject,
           Iterable<? extends Func<? super X,Boolean>> conditions)

Ctor.

Type Parameters:

X - Type of items in the iterable

Parameters:

subject - The subject

conditions - Funcs to map

Since:

0.49

And

@SafeVarargs
public And(Scalar<Boolean>... scalar)

Ctor.

Parameters:

scalar - The Scalar.

And

public And(Iterable<? extends Scalar<Boolean>> iterable)

Ctor.

Parameters:

iterable - The iterable.

Method Detail

value

public Boolean value()
              throws Exception

Description copied from interface: Scalar

Convert it to the value.

Specified by:

value in interface Scalar<Boolean>

Returns:

The value

Throws:

Exception - If fails