/*
 * 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.math.random;

/**
 * This interface represent a normalized random generator for scalars.
 * Normalized generator provide null mean and unit standard deviation scalars.
 * 
 * @version $Revision$ $Date$
 * @since 1.2
 */
public interface NormalizedRandomGenerator {

	/**
	 * Generate a random scalar with null mean and unit standard deviation.
	 * <p>
	 * This method does <strong>not</strong> specify the shape of the
	 * distribution, it is the implementing class that provides it. The only
	 * contract here is to generate numbers with null mean and unit standard
	 * deviation.
	 * </p>
	 * 
	 * @return a random scalar with null mean and unit standard deviation
	 */
	public double nextNormalizedDouble();

}
