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/*
* Copyright 2010 Google Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
package com.google.java.contract.util;
/**
* Utilities for iterables.
*
* These methods are intentionally name-compatible with
* {@link com.google.common.collect.Iterables}, so as to make it easy
* to switch between them.
*
* @author [email protected] (Nhat Minh Lê)
*/
public final class Iterables {
private Iterables() {
}
/**
* Applies {@code all(p)} to {@code it}.
*
*
Warning: this method accepts a {@code null} iterable
* object and returns {@code false}. The similarly-named method in
* {@link com.google.common.collect.Iterables} does not take
* {@code null} as input.
*/
public static boolean all(Iterable it, Predicate p) {
if (it == null) {
return false;
}
for (T elem : it) {
if (!p.apply(elem)) {
return false;
}
}
return true;
}
/**
* Applies {@code any(p)} to {@code it}.
*
* Warning: this method accepts a {@code null} iterable
* object and returns {@code false}. The similarly-named method in
* {@link com.google.common.collect.Iterables} does not take
* {@code null} as input.
*/
public static boolean any(Iterable it, Predicate p) {
if (it == null) {
return false;
}
for (T elem : it) {
if (p.apply(elem)) {
return true;
}
}
return false;
}
}