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 import org.apache.commons.math.linear.MatrixVisitorException; 21 22 /** 23 * Default implementation of the {@link RealMatrixChangingVisitor} interface. 24 * <p> 25 * This class is a convenience to create custom visitors without defining all 26 * methods. This class provides default implementations that do nothing. 27 * </p> 28 * 29 * @version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 fvr. 2011) $ 30 * @since 2.0 31 */ 32 public class DefaultRealMatrixChangingVisitor implements RealMatrixChangingVisitor { 33 34 /** {@inheritDoc} */ 35 public void start(int rows, int columns, 36 int startRow, int endRow, int startColumn, int endColumn) { 37 } 38 39 /** {@inheritDoc} */ 40 public double visit(int row, int column, double value) throws MatrixVisitorException { 41 return value; 42 } 43 44 /** {@inheritDoc} */ 45 public double end() { 46 return 0; 47 } 48 49 } 50
