/**
* Copyright 2009 Google Inc.
*
* 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 org.waveprotocol.wave.model.adt;
/**
* Describes a basic set. This is a subset of the JDK set functionality.
*
* Null values may not be supported by some implementations.
*
*/
public interface BasicSet<T> {
/**
* @return the values in this set.
*/
Iterable<T> getValues();
/**
* Tests if this set contains a specific value.
*
* @param value value to test for
* @return true if {@code value} is in this set.
*/
boolean contains(T value);
/**
* Adds a value to this set.
*
* @param value value to add
*/
void add(T value);
/**
* Removes a value from this set.
*
* @param value value to remove
*/
void remove(T value);
/**
* Removes all values from this set.
*/
void clear();
}