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
18package org.apache.commons.math.linear;
19
20import org.apache.commons.math.linear.MatrixVisitorException;
21
22/**
23 * Default implementation of the {@link RealMatrixPreservingVisitor} 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 févr. 2011) $
30 * @since 2.0
31 */
32public class DefaultRealMatrixPreservingVisitor implements RealMatrixPreservingVisitor {
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 void visit(int row, int column, double value)
41        throws MatrixVisitorException {
42    }
43
44    /** {@inheritDoc} */
45    public double end() {
46        return 0;
47    }
48
49}
50