/*
* Copyright 2010 Henry Coles
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and limitations under the License.
*/
package org.pitest.functional;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Slightly functional style operations for arrays.
*/
public abstract class FArray {
public static <T> void filter(final T[] xs, final F<T, Boolean> predicate,
final Collection<T> dest) {
if (xs != null) {
for (final T x : xs) {
if (predicate.apply(x)) {
dest.add(x);
}
}
}
}
public static <T> List<T> filter(final T[] xs, final F<T, Boolean> predicate) {
final List<T> dest = new ArrayList<T>();
filter(xs, predicate, dest);
return dest;
}
public static <T> boolean contains(final T[] xs, final F<T, Boolean> predicate) {
for (final T x : xs) {
if (predicate.apply(x)) {
return true;
}
}
return false;
}
public static <A, B> void flatMapTo(final A[] as,
final F<A, ? extends Iterable<B>> f, final Collection<? super B> bs) {
if (as != null) {
for (final A a : as) {
for (final B each : f.apply(a)) {
bs.add(each);
}
}
}
}
public static <A, B> FunctionalList<B> flatMap(final A[] as,
final F<A, ? extends Iterable<B>> f) {
final FunctionalList<B> bs = emptyList();
flatMapTo(as, f, bs);
return bs;
}
private static <T> FunctionalList<T> emptyList() {
return new MutableList<T>();
}
}