/*
 * Copyright (c) 2021 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.
/** * 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); } }