java.lang.Object
- org.glassfish.jersey.internal.guava.Predicates

```
public final class Predicates
extends Object
```
Static utility methods pertaining to Predicate instances.

All methods returns serializable predicates as long as they're given serializable parameters.

See the Guava User Guide article on the use of Predicate.

Since:

2.0 (imported from Google Collections Library)

Author:

Kevin Bourrillion

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> Predicate<T>`	`alwaysTrue()`	Returns a predicate that always evaluates to `true`.
`static <A,B> Predicate<A>`	`compose(Predicate<B> predicate, Function<A,? extends B> function)`	Returns the composition of a function and a predicate.
`static <T> Predicate<T>`	`equalTo(T target)`	Returns a predicate that evaluates to `true` if the object being tested `equals()` the given target or both are null.
`static <T> Predicate<T>`	`in(Collection<? extends T> target)`	Returns a predicate that evaluates to `true` if the object reference being tested is a member of the given collection.
`static <T> Predicate<T>`	`not(Predicate<T> predicate)`	Returns a predicate that evaluates to `true` if the given predicate evaluates to `false`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - alwaysTrue
```
public static <T> Predicate<T> alwaysTrue()
```
    Returns a predicate that always evaluates to true.
  - not
```
public static <T> Predicate<T> not(Predicate<T> predicate)
```
    Returns a predicate that evaluates to true if the given predicate evaluates to false.
  - equalTo
```
public static <T> Predicate<T> equalTo(T target)
```
    Returns a predicate that evaluates to true if the object being tested equals() the given target or both are null.
  - in
```
public static <T> Predicate<T> in(Collection<? extends T> target)
```
    Returns a predicate that evaluates to true if the object reference being tested is a member of the given collection. It does not defensively copy the collection passed in, so future changes to it will alter the behavior of the predicate.
    
    This method can technically accept any Collection<?>, but using a typed collection helps prevent bugs. This approach doesn't block any potential users since it is always possible to use Predicates.<Object>in().
    
    Parameters:
    
    target - the collection that may contain the function input
  - compose
```
public static <A,B> Predicate<A> compose(Predicate<B> predicate,
                                               Function<A,? extends B> function)
```
    Returns the composition of a function and a predicate. For every x, the generated predicate returns predicate(function(x)).
    
    Returns:
    
    the composition of the provided function and predicate

Class Predicates

Method Summary

Methods inherited from class java.lang.Object

Method Detail

alwaysTrue

not

equalTo

in

compose