Java tutorial
/* * 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.math3.linear; /** * Default implementation of the {@link RealMatrixPreservingVisitor} interface. * <p> * This class is a convenience to create custom visitors without defining all * methods. This class provides default implementations that do nothing. * </p> * * @version $Id: DefaultRealMatrixPreservingVisitor.java 1416643 2012-12-03 19:37:14Z tn $ * @since 2.0 */ public class DefaultRealMatrixPreservingVisitor implements RealMatrixPreservingVisitor { /** {@inheritDoc} */ public void start(int rows, int columns, int startRow, int endRow, int startColumn, int endColumn) { } /** {@inheritDoc} */ public void visit(int row, int column, double value) { } /** {@inheritDoc} */ public double end() { return 0; } }