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/* Generic definitions */
/* Assertions (useful to generate conditional code) */
/* Current type and class (and size, if applicable) */
/* Value methods */
/* Interfaces (keys) */
/* Interfaces (values) */
/* Abstract implementations (keys) */
/* Abstract implementations (values) */
/* Static containers (keys) */
/* Static containers (values) */
/* Implementations */
/* Synchronized wrappers */
/* Unmodifiable wrappers */
/* Other wrappers */
/* Methods (keys) */
/* Methods (values) */
/* Methods (keys/values) */
/* Methods that have special names depending on keys (but the special names depend on values) */
/* Equality */
/* Object/Reference-only definitions (keys) */
/* Primitive-type-only definitions (keys) */
/* Object/Reference-only definitions (values) */
/*		 
 * Copyright (C) 2002-2015 Sebastiano Vigna
 *
 * 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 it.unimi.dsi.fastutil.bytes;

import java.util.Set;

/** An abstract class providing basic methods for sets implementing a type-specific interface. */
public abstract class AbstractByteSet extends AbstractByteCollection implements Cloneable, ByteSet {
	protected AbstractByteSet() {}

	public abstract ByteIterator iterator();

	public boolean equals( final Object o ) {
		if ( o == this ) return true;
		if ( !( o instanceof Set ) ) return false;
		Set s = (Set)o;
		if ( s.size() != size() ) return false;
		return containsAll( s );
	}

	/** Returns a hash code for this set.
	 *
	 * The hash code of a set is computed by summing the hash codes of its elements.
	 *
	 * @return a hash code for this set. */
	public int hashCode() {
		int h = 0, n = size();
		ByteIterator i = iterator();
		byte k;
		while ( n-- != 0 ) {
			k = i.nextByte(); // We need k because KEY2JAVAHASH() is a macro with repeated evaluation.
			h += ( k );
		}
		return h;
	}

	public boolean remove( byte k ) {
		throw new UnsupportedOperationException();
	}

	/** Delegates to remove().
	 *
	 * @param k the element to be removed.
	 * @return true if the set was modified. */
	public boolean rem( byte k ) {
		return remove( k );
	}

	/** Delegates to the corresponding type-specific method. */
	public boolean remove( final Object o ) {
		return remove( ( ( ( (Byte)( o ) ).byteValue() ) ) );
	}
}