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There is a newer version: 15.1.0.Dev04
package org.infinispan;

import java.util.Collection;
import java.util.function.Consumer;
import java.util.function.Predicate;

import org.infinispan.commons.util.CloseableIterator;
import org.infinispan.commons.util.CloseableSpliterator;
import org.infinispan.commons.util.IntSet;
import org.reactivestreams.Publisher;

/**
 * Base class for internal classes used in cache collections.
 *
 * It extends {@link CacheSet} because that's what interceptors used return for
 * {@link org.infinispan.commands.read.KeySetCommand} and {@link org.infinispan.commands.read.EntrySetCommand},
 * but because these classes are only used internally, we can avoid implementing most of the methods.
 *
 * Subclasses only need to implement {@link #localPublisher(IntSet)} and {@link #localPublisher(int)},
 * and a facade class like {@link org.infinispan.cache.impl.CacheBackedKeySet} implements the rest of the
 * {@link CacheSet} methods.
 *
 * @param  The element type
 * @since 14.0
 * @author Dan Berindei
 */
public abstract class InternalCacheSet implements CacheSet {
   @Override
   public abstract Publisher localPublisher(int segment);

   @Override
   public abstract Publisher localPublisher(IntSet segments);

   @Override
   public final boolean removeIf(Predicate filter) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final void forEach(Consumer action) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final CloseableIterator iterator() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final CloseableSpliterator spliterator() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final CacheStream stream() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final CacheStream parallelStream() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final int size() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean isEmpty() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean contains(Object o) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final Object[] toArray() {
      throw new UnsupportedOperationException();
   }

   @Override
   public final  T[] toArray(T[] a) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean add(E e) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean remove(Object o) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean containsAll(Collection c) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean addAll(Collection c) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean removeAll(Collection c) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final boolean retainAll(Collection c) {
      throw new UnsupportedOperationException();
   }

   @Override
   public final void clear() {
      throw new UnsupportedOperationException();
   }
}