001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.math3.random;
019    
020    /**
021     * This interface represent a normalized random generator for
022     * scalars.
023     * Normalized generator provide null mean and unit standard deviation scalars.
024     * @version $Id: NormalizedRandomGenerator.java 1416643 2012-12-03 19:37:14Z tn $
025     * @since 1.2
026     */
027    public interface NormalizedRandomGenerator {
028    
029      /** Generate a random scalar with null mean and unit standard deviation.
030       * <p>This method does <strong>not</strong> specify the shape of the
031       * distribution, it is the implementing class that provides it. The
032       * only contract here is to generate numbers with null mean and unit
033       * standard deviation.</p>
034       * @return a random scalar with null mean and unit standard deviation
035       */
036      double nextNormalizedDouble();
037    
038    }