| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.commons.rng; |
| |
| /** |
| * Applies to generators whose internal state can be saved and restored. |
| * |
| * @since 1.0 |
| */ |
| public interface RestorableUniformRandomProvider extends UniformRandomProvider { |
| /** |
| * Saves the state of a generator. |
| * |
| * @return the current state of this instance. It is a value that can |
| * subsequently be passed to the {@link #restoreState(RandomProviderState) |
| * restore} method. |
| * @throws UnsupportedOperationException if the underlying source of |
| * randomness does not support this functionality. |
| */ |
| RandomProviderState saveState(); |
| |
| /** |
| * Restores the state of a generator. |
| * |
| * @param state State which this instance will be set to. |
| * This parameter would usually have been obtained by a call to |
| * {@link #saveState() saveState} performed either on the same |
| * object as this one, or an object of the exact same class. |
| * @throws UnsupportedOperationException if the underlying source of |
| * randomness does not support this functionality. |
| * @throws IllegalArgumentException if it was detected that the |
| * {@code state} argument is incompatible with this instance. |
| */ |
| void restoreState(RandomProviderState state); |
| } |