IdGenerator.java

/*
 * Copyright 2012 the original author or authors.
 *
 * 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.gradle.internal.id;

/**
 * Generates a sequence of unique ids of type T. Implementations must be thread-safe.
 */
public interface IdGenerator<T> {
    /**
     * Generates a new id. Values must be serializable.
     *
     * @return The id. Must not return null. Must not return a given value more than once.
     */
    T generateId();
}