com.ibm.wala.util
Class Predicate<T>

java.lang.Object
  com.ibm.wala.util.Predicate<T>

Direct Known Subclasses:

FilterPredicate

public abstract class Predicate<T>
extends java.lang.Object

Interface for defining an arbitrary predicate on Objects.

Field Summary

static Predicate	FALSE
static Predicate	TRUE

Constructor Summary

Predicate()

Method Summary

Predicate<T>	and(Predicate<T> conjunct) Return a predicate that is a conjunction of this predicate and another predicate
static <T> Predicate<T>	falsePred()
static <T> java.util.List<T>	filter(java.util.Iterator<T> src, Predicate<T> pred) Filter a collection: generate a new list from an existing collection, consisting of the elements satisfying some predicate.
static <T> Predicate<T>	isElementOf(java.util.Collection<T> c) Create the predicate "is an element of c"
Predicate<T>	not() Return a predicate that is a negation of this predicate
Predicate<T>	or(Predicate<T> disjunct) Return a predicate that is a conjunction of this predicate and another predicate
abstract boolean	test(T t) Test whether an Object satisfies this Predicate
static <T> Predicate<T>	truePred()

Methods inherited from class java.lang.Object

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

Field Detail

FALSE

public static final Predicate FALSE

TRUE

public static final Predicate TRUE

Constructor Detail

Predicate

public Predicate()

Method Detail

truePred

public static <T> Predicate<T> truePred()

falsePred

public static <T> Predicate<T> falsePred()

test

public abstract boolean test(T t)

Test whether an Object satisfies this Predicate

not

public Predicate<T> not()

Return a predicate that is a negation of this predicate

and

public Predicate<T> and(Predicate<T> conjunct)

Return a predicate that is a conjunction of this predicate and another predicate

or

public Predicate<T> or(Predicate<T> disjunct)

Return a predicate that is a conjunction of this predicate and another predicate

isElementOf

public static <T> Predicate<T> isElementOf(java.util.Collection<T> c)

Create the predicate "is an element of c"

filter

public static <T> java.util.List<T> filter(java.util.Iterator<T> src,
                                           Predicate<T> pred)
                                throws java.lang.IllegalArgumentException

Filter a collection: generate a new list from an existing collection, consisting of the elements satisfying some predicate.

Throws:

java.lang.IllegalArgumentException - if src == null