org.canova.api.util.SetUtils Maven / Gradle / Ivy
/*
*
* *
* * * Copyright 2015 Skymind,Inc.
* * *
* * * 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.canova.api.util;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
public class SetUtils
{
private SetUtils() {}
// Set specific operations
public static Set intersection(Collection parentCollection, Collection removeFromCollection)
{
Set results = new HashSet(parentCollection) ;
results.retainAll(removeFromCollection) ;
return results ;
}
public static boolean intersectionP(Set s1, Set s2)
{
for( T elt : s1 )
{
if ( s2.contains(elt) )
return true ;
}
return false ;
}
public static Set union(Set s1, Set s2)
{
Set s3 = new HashSet(s1) ;
s3.addAll(s2) ;
return s3 ;
}
/** Return is s1 \ s2 */
public static Set difference(Collection s1, Collection s2)
{
Set s3 = new HashSet(s1) ;
s3.removeAll(s2) ;
return s3 ;
}
}