/*
 * 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.SelectInstancesOfIterator;
import org.eclipse.collections.impl.utility.Iterate;

A SelectIterable is an iterable that filters a source iterable for instances of a Class as it iterates.
/** * A SelectIterable is an iterable that filters a source iterable for instances of a Class as it iterates. */
public class SelectInstancesOfIterable<T> extends AbstractLazyIterable<T> { private final Iterable<?> adapted; private final Class<T> clazz; public SelectInstancesOfIterable(Iterable<?> newAdapted, Class<T> clazz) { this.adapted = newAdapted; this.clazz = clazz; } @Override public void each(Procedure<? super T> procedure) { Iterate.forEach((Iterable<T>) this.adapted, new IfProcedure<>(Predicates.instanceOf(this.clazz), procedure)); } @Override public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure) { Iterate.forEach((Iterable<T>) this.adapted, new IfObjectIntProcedure<>(Predicates.instanceOf(this.clazz), objectIntProcedure)); } @Override public <P> void forEachWith(Procedure2<? super T, ? super P> procedure, P parameter) { Iterate.forEachWith((Iterable<T>) this.adapted, new IfProcedureWith<>(Predicates.instanceOf(this.clazz), procedure), parameter); } @Override public T getFirst() { return this.clazz.cast(Iterate.detect(this.adapted, Predicates.instanceOf(this.clazz))); } @Override public boolean anySatisfy(Predicate<? super T> predicate) { return Iterate.anySatisfy((Iterable<T>) this.adapted, Predicates.and(Predicates.instanceOf(this.clazz), predicate)); } @Override public boolean allSatisfy(Predicate<? super T> predicate) { return Iterate.allSatisfy((Iterable<T>) this.adapted, new AllSatisfyPredicate<>(Predicates.instanceOf(this.clazz), predicate)); } @Override public boolean noneSatisfy(Predicate<? super T> predicate) { return Iterate.noneSatisfy((Iterable<T>) this.adapted, new AllSatisfyPredicate<>(Predicates.instanceOf(this.clazz), predicate)); } @Override public T detect(Predicate<? super T> predicate) { return Iterate.detect((Iterable<T>) this.adapted, Predicates.and(Predicates.instanceOf(this.clazz), predicate)); } @Override public Optional<T> detectOptional(Predicate<? super T> predicate) { return Iterate.detectOptional((Iterable<T>) this.adapted, Predicates.and(Predicates.instanceOf(this.clazz), predicate)); } @Override public Iterator<T> iterator() { return new SelectInstancesOfIterator<>(this.adapted, this.clazz); } }