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SelectIterable.java
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SelectIterable.java
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/*
* Copyright (c) 2016 Goldman Sachs.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.lazy;
import java.util.Iterator;
import java.util.Optional;
import org.eclipse.collections.api.block.predicate.Predicate;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.block.procedure.primitive.ObjectIntProcedure;
import org.eclipse.collections.impl.block.factory.Predicates;
import org.eclipse.collections.impl.block.procedure.IfObjectIntProcedure;
import org.eclipse.collections.impl.block.procedure.IfProcedure;
import org.eclipse.collections.impl.block.procedure.IfProcedureWith;
import org.eclipse.collections.impl.lazy.iterator.SelectIterator;
import org.eclipse.collections.impl.utility.Iterate;
/**
* A SelectIterable is an iterable that filters a source iterable on a condition as it iterates.
*/
public class SelectIterable<T>
extends AbstractLazyIterable<T>
{
private final Iterable<T> adapted;
private final Predicate<? super T> predicate;
public SelectIterable(Iterable<T> newAdapted, Predicate<? super T> newPredicate)
{
this.adapted = newAdapted;
this.predicate = newPredicate;
}
@Override
public void each(Procedure<? super T> procedure)
{
Iterate.forEach(this.adapted, new IfProcedure<>(this.predicate, procedure));
}
@Override
public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)
{
Iterate.forEach(this.adapted, new IfObjectIntProcedure<>(this.predicate, objectIntProcedure));
}
@Override
public <P> void forEachWith(Procedure2<? super T, ? super P> procedure, P parameter)
{
Iterate.forEachWith(this.adapted, new IfProcedureWith<>(this.predicate, procedure), parameter);
}
@Override
public Iterator<T> iterator()
{
return new SelectIterator<>(this.adapted.iterator(), this.predicate);
}
@Override
public boolean anySatisfy(Predicate<? super T> predicate)
{
return Iterate.anySatisfy(this.adapted, Predicates.and(this.predicate, predicate));
}
@Override
public boolean allSatisfy(Predicate<? super T> predicate)
{
return Iterate.allSatisfy(this.adapted, new AllSatisfyPredicate<>(this.predicate, predicate));
}
@Override
public boolean noneSatisfy(Predicate<? super T> predicate)
{
return Iterate.noneSatisfy(this.adapted, new AllSatisfyPredicate<>(this.predicate, predicate));
}
@Override
public T detect(Predicate<? super T> predicate)
{
return Iterate.detect(this.adapted, Predicates.and(this.predicate, predicate));
}
@Override
public Optional<T> detectOptional(Predicate<? super T> predicate)
{
return Iterate.detectOptional(this.adapted, Predicates.and(this.predicate, predicate));
}
@Override
public T getFirst()
{
return Iterate.detect(this.adapted, this.predicate);
}
}