/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2016 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.util;
import java.util.Arrays;
import java.util.Collection;
public abstract class CollectionUtil {
/**
* Checks if the collection contains only the given allowed items. <tt>list</tt>
* may contain zero to max(allowedItems) items from allowedItems.
*
* <p><b>Examples:</b><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 })) --> true</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), 1, 2) --> false, 3 missing</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), 1, 99) --> false, 3 missing</tt>
*/
@SafeVarargs
public static <T> boolean containsOnly(Collection<T> list, T... allowedItems) {
return containsOnly(list, Arrays.asList(allowedItems));
}
/**
* Checks if the collection contains only the given allowed items. <tt>list</tt>
* may contain zero to max(allowedItems) items from allowedItems.
*
* <p><b>Examples:</b><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { })) --> true</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { 1, 2 })) --> false, 3 missing</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { 1, 99 })) --> false, 3 missing</tt>
*/
public static <T> boolean containsOnly(Collection<T> list, Collection<T> allowedItems) {
for (T item : list) {
if (!allowedItems.contains(item)) {
return false;
}
}
return true;
}
/**
* Checks if the collection contains exactly the given <tt>mustHaveItems</tt>.
*
* <p><b>Examples:</b><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 })) --> false</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), 1, 99) --> false</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), 1, 2, 3) --> true</tt>
*/
@SafeVarargs
public static <T> boolean containsExactly(Collection<T> list, T... mustHaveItems) {
return containsExactly(list, Arrays.asList(mustHaveItems));
}
/**
* Checks if the collection contains exactly the given <tt>mustHaveItems</tt>.
*
* <p><b>Examples:</b><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { })) --> false</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { 1, 99 })) --> false</tt><br>
* <tt>containsOnly(Arrays.asList(new Integer[] { 1, 2, 3 }), Arrays.asList(new Integer[] { 1, 2, 3 })) --> true</tt>
*/
public static <T> boolean containsExactly(Collection<T> list, Collection<T> mustHaveItems) {
return list.containsAll(mustHaveItems) && mustHaveItems.containsAll(list);
}
}