1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.math.linear; 19 20 /** 21 * Default implementation of the {@link RealMatrixPreservingVisitor} interface. 22 * <p> 23 * This class is a convenience to create custom visitors without defining all 24 * methods. This class provides default implementations that do nothing. 25 * </p> 26 * 27 * @version $Revision: 778191 $ $Date: 2009-05-24 12:44:52 -0400 (Sun, 24 May 2009) $ 28 * @since 2.0 29 */ 30 public class DefaultRealMatrixPreservingVisitor implements RealMatrixPreservingVisitor { 31 32 /** {@inheritDoc} */ 33 public void start(int rows, int columns, 34 int startRow, int endRow, int startColumn, int endColumn) { 35 } 36 37 /** {@inheritDoc} */ 38 public void visit(int row, int column, double value) 39 throws MatrixVisitorException { 40 } 41 42 /** {@inheritDoc} */ 43 public double end() { 44 return 0; 45 } 46 47 }