## Package org.apache.commons.collections.functors

This package contains implementations of the `Closure`, `Predicate`, `Transformer` and `Factory` interfaces.

See:
Description

Interface Summary
PredicateDecorator: Defines a predicate that decorates one or more other predicates.

Class Summary
AllPredicate: Predicate implementation that returns true if all the predicates return true.
AndPredicate: Predicate implementation that returns true if both the predicates return true.
AnyPredicate: Predicate implementation that returns true if any of the predicates return true.
ChainedClosure: Closure implementation that chains the specified closures together.
ChainedTransformer: Transformer implementation that chains the specified transformers together.
CloneTransformer: Transformer implementation that returns a clone of the input object.
ClosureTransformer: Transformer implementation that calls a Closure using the input object and then returns the input.
ConstantFactory: Factory implementation that returns the same constant each time.
ConstantTransformer: Transformer implementation that returns the same constant each time.
EqualPredicate: Predicate implementation that returns true if the input is the same object as the one stored in this predicate by equals.
ExceptionClosure: Closure implementation that always throws an exception.
ExceptionFactory: Factory implementation that always throws an exception.
ExceptionPredicate: Predicate implementation that always throws an exception.
ExceptionTransformer: Transformer implementation that always throws an exception.
FactoryTransformer: Transformer implementation that calls a Factory and returns the result.
FalsePredicate: Predicate implementation that always returns false.
ForClosure: Closure implementation that calls another closure n times, like a for loop.
IdentityPredicate: Predicate implementation that returns true if the input is the same object as the one stored in this predicate.
IfClosure: Closure implementation acts as an if statement calling one or other closure based on a predicate.
InstanceofPredicate: Predicate implementation that returns true if the input is an instanceof the type stored in this predicate.
InstantiateFactory: Factory implementation that creates a new object instance by reflection.
InstantiateTransformer: Transformer implementation that creates a new object instance by reflection.
InvokerTransformer: Transformer implementation that creates a new object instance by reflection.
MapTransformer: Transformer implementation that returns the value held in a specified map using the input parameter as a key.
NonePredicate: Predicate implementation that returns true if none of the predicates return true.
NOPClosure: Closure implementation that does nothing.
NOPTransformer: Transformer implementation that does nothing.
NotNullPredicate: Predicate implementation that returns true if the input is not null.
NotPredicate: Predicate implementation that returns the opposite of the decorated predicate.
NullIsExceptionPredicate: Predicate implementation that throws an exception if the input is null.
NullIsFalsePredicate: Predicate implementation that returns false if the input is null.
NullIsTruePredicate: Predicate implementation that returns true if the input is null.
NullPredicate: Predicate implementation that returns true if the input is null.
OnePredicate: Predicate implementation that returns true if only one of the predicates return true.
OrPredicate: Predicate implementation that returns true if either of the predicates return true.
PredicateTransformer: Transformer implementation that calls a Predicate using the input object and then returns the input.
PrototypeFactory: Factory implementation that creates a new instance each time based on a prototype.
StringValueTransformer: Transformer implementation that returns the `String.valueOf`.
SwitchClosure: Closure implementation calls the closure whose predicate returns true, like a switch statement.
SwitchTransformer: Transformer implementation calls the transformer whose predicate returns true, like a switch statement.
TransformedPredicate: Predicate implementation that transforms the given object before invoking another `Predicate`.
TransformerClosure: Closure implementation that calls a Transformer using the input object and ignore the result.
TransformerPredicate: Predicate implementation that returns the result of a transformer.
TruePredicate: Predicate implementation that always returns true.
UniquePredicate: Predicate implementation that returns true the first time an object is passed into the predicate.
WhileClosure: Closure implementation that executes a closure repeatedly until a condition is met, like a do-while or while loop.

## Package org.apache.commons.collections.functors Description

This package contains implementations of the `Closure`, `Predicate`, `Transformer` and `Factory` interfaces. These provide simple callbacks for processing with collections.

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