com.swirlds.fchashmap.internal.FCHashMapEntrySet Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of swirlds-fchashmap Show documentation

Swirlds is a software platform designed to build fully-distributed applications that harness the power of the cloud without servers. Now you can develop applications with fairness in decision making, speed, trust and reliability, at a fraction of the cost of traditional server-based platforms.

There is a newer version: 0.56.5

Show newest version

/*
 * Copyright (C) 2022-2024 Hedera Hashgraph, LLC
 *
 * 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.swirlds.fchashmap.internal;

import com.swirlds.fchashmap.FCHashMap;
import java.util.AbstractSet;
import java.util.Iterator;
import java.util.Map;

/**
 * An entry set view for {@link FCHashMap}.
 *
 * @param 
 * 		the type of the map's key
 * @param 
 * 		the type of the map's value
 */
public class FCHashMapEntrySet extends AbstractSet> {

    private final FCHashMap map;
    private final FCHashMapFamily family;

    /**
     * Create a new entry set view for an {@link FCHashMap}.
     *
     * @param map
     * 		the map that will be represented by this set
     */
    public FCHashMapEntrySet(final FCHashMap map, final FCHashMapFamily family) {
        this.map = map;
        this.family = family;
    }

    /**
     * {@inheritDoc}
     */
    public Iterator> iterator() {
        return new FCHashMapEntrySetIterator<>(map, family.keyIterator());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int size() {
        return map.size();
    }

    /**
     * Equals isn't implemented, because it would be extremely inefficient
     *
     * @param o
     * 		object to be compared for equality with this set
     * @throws UnsupportedOperationException
     * 		if called
     */
    @Override
    public boolean equals(final Object o) {
        throw new UnsupportedOperationException();
    }

    /**
     * HashCode isn't implemented, because it would be extremely inefficient
     *
     * @throws UnsupportedOperationException
     * 		if called
     */
    @Override
    public int hashCode() {
        throw new UnsupportedOperationException();
    }
}