org.qi4j.functional
Class ForEach<T>

java.lang.Object
  org.qi4j.functional.ForEach<T>

All Implemented Interfaces:

java.lang.Iterable<T>

public final class ForEach<T>
extends java.lang.Object
implements java.lang.Iterable<T>

When using Iterables with map() and filter() the code often reads "in reverse", with the first item last in the code. Example: Iterables.map(function,Iterables.filter(specification, iterable))

This ForEach class reverses that order and makes the code more readable, and allows easy application of visitors on iterables. Example: forEach(iterable).filter(specification).map(function).visit(visitor)

Constructor Summary

ForEach(java.lang.Iterable<T> iterable)

Method Summary

ForEach<T>	filter(Specification<? super T> specification)
<TO> ForEach<TO>	flatten()
static <T> ForEach<T>	forEach(java.lang.Iterable<T> iterable)
java.util.Iterator<T>	iterator()
T	last()
<TO> ForEach<TO>	map(Function<?,TO> function)
<ThrowableType extends java.lang.Throwable> boolean	visit(Visitor<T,ThrowableType> visitor)

Methods inherited from class java.lang.Object

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

Constructor Detail

ForEach

public ForEach(java.lang.Iterable<T> iterable)

Method Detail

forEach

public static <T> ForEach<T> forEach(java.lang.Iterable<T> iterable)

iterator

public java.util.Iterator<T> iterator()

Specified by:

iterator in interface java.lang.Iterable<T>

filter

public ForEach<T> filter(Specification<? super T> specification)

map

public <TO> ForEach<TO> map(Function<?,TO> function)

flatten

public <TO> ForEach<TO> flatten()

last

public T last()

visit

public <ThrowableType extends java.lang.Throwable> boolean visit(Visitor<T,ThrowableType> visitor)
              throws ThrowableType extends java.lang.Throwable

Throws:

ThrowableType extends java.lang.Throwable