com.google.common.collect.EmptyImmutableSortedMultiset Maven / Gradle / Ivy

Go to download
/*
 * Copyright (C) 2011 The Guava Authors
 *
 * 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 com.google.common.collect;

import static com.google.common.base.Preconditions.checkNotNull;
import java.util.Collection;
import java.util.Comparator;
import javax.annotation.Nullable;

/**
 *  An empty immutable sorted multiset.
 *
 *  @author Louis Wasserman
 *
 * @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
 */
// Uses writeReplace, not default serialization
@SuppressWarnings("serial")
@Deprecated(since = "2022-12-01")
final class EmptyImmutableSortedMultiset extends ImmutableSortedMultiset {

    private final ImmutableSortedSet elementSet;

    EmptyImmutableSortedMultiset(Comparator comparator) {
        this.elementSet = ImmutableSortedSet.emptySet(comparator);
    }

    @Override
    public Entry firstEntry() {
        return null;
    }

    @Override
    public Entry lastEntry() {
        return null;
    }

    @Override
    public int count(@Nullable Object element) {
        return 0;
    }

    @Override
    public boolean containsAll(Collection targets) {
        return targets.isEmpty();
    }

    @Override
    public int size() {
        return 0;
    }

    @Override
    public ImmutableSortedSet elementSet() {
        return elementSet;
    }

    @Override
    Entry getEntry(int index) {
        throw new AssertionError("should never be called");
    }

    @Override
    public ImmutableSortedMultiset headMultiset(E upperBound, BoundType boundType) {
        checkNotNull(upperBound);
        checkNotNull(boundType);
        return this;
    }

    @Override
    public ImmutableSortedMultiset tailMultiset(E lowerBound, BoundType boundType) {
        checkNotNull(lowerBound);
        checkNotNull(boundType);
        return this;
    }

    @Override
    public UnmodifiableIterator iterator() {
        return Iterators.emptyIterator();
    }

    @Override
    public boolean equals(@Nullable Object object) {
        if (object instanceof Multiset) {
            Multiset other = (Multiset) object;
            return other.isEmpty();
        }
        return false;
    }

    @Override
    boolean isPartialView() {
        return false;
    }

    @Override
    int copyIntoArray(Object[] dst, int offset) {
        return offset;
    }

    @Override
    public ImmutableList asList() {
        return ImmutableList.of();
    }
}