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Functional utilities for Java: core APIs
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/*
* Copyright (C) 2011-Present Funk committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.javafunk.funk;
import com.google.common.collect.Multiset;
import org.javafunk.funk.functors.Predicate;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import static org.javafunk.funk.Eagerly.first;
import static org.javafunk.funk.Eagerly.rest;
import static org.javafunk.funk.Iterables.asSet;
import static org.javafunk.funk.Lazily.filter;
import static org.javafunk.funk.Literals.*;
public class Sets {
private Sets() {}
public static Set union(Iterable> iterables) {
Set unionSet = new HashSet();
for (Iterable iterable : iterables) {
unionSet.addAll(collectionFrom(iterable));
}
return unionSet;
}
public static Set intersection(Iterable> iterables) {
Set intersectionSet = new HashSet(collectionFrom(first(iterables).get()));
for (Iterable iterable : rest(iterables)) {
intersectionSet.retainAll(collectionFrom(iterable));
}
return intersectionSet;
}
public static Set difference(Iterable> iterables) {
List> arguments = listFrom(iterables);
if (arguments.isEmpty()) {
return new HashSet();
} else {
Set differenceSet = setBuilderFrom(first(arguments).get()).build(HashSet.class);
differenceSet.removeAll(union(rest(arguments)));
return differenceSet;
}
}
public static Set symmetricDifference(Iterable> iterables) {
final Multiset unionMultiset = Multisets.concatenate(iterables);
return asSet(filter(unionMultiset, new Predicate() {
public boolean evaluate(T element) {
return isOdd(unionMultiset.count(element));
}
private boolean isOdd(Integer value) {
return value % 2 == 1;
}
}));
}
public static Set union(
Iterable i1, Iterable i2) {
return union(iterableWith(i1, i2));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3) {
return union(iterableWith(i1, i2, i3));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4) {
return union(iterableWith(i1, i2, i3, i4));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5) {
return union(iterableWith(i1, i2, i3, i4, i5));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6) {
return union(iterableWith(i1, i2, i3, i4, i5, i6));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7) {
return union(iterableWith(i1, i2, i3, i4, i5, i6, i7));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8) {
return union(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9) {
return union(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10) {
return union(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10));
}
public static Set union(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10, Iterable... i11on) {
return union(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11on));
}
public static Set intersection(
Iterable i1, Iterable i2) {
return intersection(iterableWith(i1, i2));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3) {
return intersection(iterableWith(i1, i2, i3));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4) {
return intersection(iterableWith(i1, i2, i3, i4));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5) {
return intersection(iterableWith(i1, i2, i3, i4, i5));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6, i7));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10));
}
public static Set intersection(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10, Iterable... i11on) {
return intersection(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11on));
}
public static Set difference(
Iterable i1, Iterable i2) {
return difference(iterableWith(i1, i2));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3) {
return difference(iterableWith(i1, i2, i3));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4) {
return difference(iterableWith(i1, i2, i3, i4));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5) {
return difference(iterableWith(i1, i2, i3, i4, i5));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6, i7));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10));
}
public static Set difference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10, Iterable... i11on) {
return difference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11on));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2) {
return symmetricDifference(iterableWith(i1, i2));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3) {
return symmetricDifference(iterableWith(i1, i2, i3));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4) {
return symmetricDifference(iterableWith(i1, i2, i3, i4));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6, i7));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10));
}
public static Set symmetricDifference(
Iterable i1, Iterable i2, Iterable i3, Iterable i4,
Iterable i5, Iterable i6, Iterable i7, Iterable i8,
Iterable i9, Iterable i10, Iterable... i11on) {
return symmetricDifference(iterableWith(i1, i2, i3, i4, i5, i6, i7, i8, i9, i10, i11on));
}
}
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