Predicates (parboiled-core

java.lang.Object
- org.parboiled.common.Predicates

public final class Predicates
extends java.lang.Object

Method Summary

Methods
Modifier and Type	Method and Description
`static <T> Predicate<T>`	`alwaysFalse()` Returns a predicate that always evaluates to `false`.
`static <T> Predicate<T>`	`alwaysTrue()` Returns a predicate that always evaluates to `true`.
`static <T> Predicate<T>`	`and(java.util.Collection<? extends Predicate<? super T>> components)` Returns a predicate that evaluates to `true` if each of its components evaluates to `true`.
`static <T> Predicate<T>`	`and(Predicate<? super T>... components)` Returns a predicate that evaluates to `true` if each of its components evaluates to `true`.
`static <T> Predicate<T>`	`and(Predicate<? super T> first, Predicate<? super T> second)` Returns a predicate that evaluates to `true` if both of its components evaluate to `true`.
`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(java.util.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 Predicate<java.lang.Object>`	`instanceOf(java.lang.Class<?> clazz)` Returns a predicate that evaluates to `true` if the object being tested is an instance of the given class.
`static <T> Predicate<T>`	`isNull()` Returns a predicate that evaluates to `true` if the object reference being tested is null.
`static <T> Predicate<T>`	`not(Predicate<T> predicate)` Returns a predicate that evaluates to `true` if the given predicate evaluates to `false`.
`static <T> Predicate<T>`	`notNull()` Returns a predicate that evaluates to `true` if the object reference being tested is not null.
`static <T> Predicate<T>`	`or(java.util.Collection<? extends Predicate<? super T>> components)` Returns a predicate that evaluates to `true` if any one of its components evaluates to `true`.
`static <T> Predicate<T>`	`or(Predicate<? super T>... components)` Returns a predicate that evaluates to `true` if any one of its components evaluates to `true`.
`static <T> Predicate<T>`	`or(Predicate<? super T> first, Predicate<? super T> second)` Returns a predicate that evaluates to `true` if either of its components evaluates to `true`.

Methods inherited from class java.lang.Object
equals, 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.
    
    Returns:
    a predicate
  - alwaysFalse
```
public static <T> Predicate<T> alwaysFalse()
```
    Returns a predicate that always evaluates to false.
    
    Returns:
    a predicate
  - isNull
```
public static <T> Predicate<T> isNull()
```
    Returns a predicate that evaluates to true if the object reference being tested is null.
    
    Returns:
    a predicate
  - notNull
```
public static <T> Predicate<T> notNull()
```
    Returns a predicate that evaluates to true if the object reference being tested is not null.
    
    Returns:
    a predicate
  - not
```
public static <T> Predicate<T> not(Predicate<T> predicate)
```
    Returns a predicate that evaluates to true if the given predicate evaluates to false.
    
    Parameters:
    predicate - the inner predicate
    
    Returns:
    a predicate
  - and
```
public static <T> Predicate<T> and(java.util.Collection<? extends Predicate<? super T>> components)
```
    Returns a predicate that evaluates to true if each of its components evaluates to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as a false predicate is found. It defensively copies the iterable passed in, so future changes to it won't alter the behavior of this predicate. If components is empty, the returned predicate will always evaluate to true.
    
    Parameters:
    components - the components
    
    Returns:
    a predicate
  - and
```
public static <T> Predicate<T> and(Predicate<? super T>... components)
```
    Returns a predicate that evaluates to true if each of its components evaluates to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as a false predicate is found. It defensively copies the array passed in, so future changes to it won't alter the behavior of this predicate. If components is empty, the returned predicate will always evaluate to true.
    
    Parameters:
    components - the components
    
    Returns:
    a predicate
  - and
```
public static <T> Predicate<T> and(Predicate<? super T> first,
                   Predicate<? super T> second)
```
    Returns a predicate that evaluates to true if both of its components evaluate to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as a false predicate is found.
    
    Parameters:
    first - the first
    second - the second
    
    Returns:
    a predicate
  - or
```
public static <T> Predicate<T> or(java.util.Collection<? extends Predicate<? super T>> components)
```
    Returns a predicate that evaluates to true if any one of its components evaluates to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as as soon as a true predicate is found. It defensively copies the iterable passed in, so future changes to it won't alter the behavior of this predicate. If components is empty, the returned predicate will always evaluate to false.
    
    Parameters:
    components - the components
    
    Returns:
    a predicate
  - or
```
public static <T> Predicate<T> or(Predicate<? super T>... components)
```
    Returns a predicate that evaluates to true if any one of its components evaluates to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as as soon as a true predicate is found. It defensively copies the array passed in, so future changes to it won't alter the behavior of this predicate. If components is empty, the returned predicate will always evaluate to false.
    
    Parameters:
    components - the components
    
    Returns:
    a predicate
  - or
```
public static <T> Predicate<T> or(Predicate<? super T> first,
                  Predicate<? super T> second)
```
    Returns a predicate that evaluates to true if either of its components evaluates to true. The components are evaluated in order, and evaluation will be "short-circuited" as soon as as soon as a true predicate is found.
    
    Parameters:
    first - the first
    second - the second
    
    Returns:
    a predicate
  - 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.
    
    Parameters:
    target - the target
    
    Returns:
    a predicate
  - instanceOf
```
public static Predicate<java.lang.Object> instanceOf(java.lang.Class<?> clazz)
```
    Returns a predicate that evaluates to true if the object being tested is an instance of the given class. If the object being tested is null this predicate evaluates to false.
    
    Parameters:
    clazz - the clazz
    
    Returns:
    a predicate
  - in
```
public static <T> Predicate<T> in(java.util.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
    
    Returns:
    a predicate

Class Predicates

Method Summary

Methods inherited from class java.lang.Object

Method Detail

alwaysTrue

alwaysFalse

isNull

notNull

not

and

and

and

or

or

or

equalTo

instanceOf

in