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.math.linear;
019
020 import org.apache.commons.math.linear.MatrixVisitorException;
021
022 /**
023 * Default implementation of the {@link RealMatrixPreservingVisitor} interface.
024 * <p>
025 * This class is a convenience to create custom visitors without defining all
026 * methods. This class provides default implementations that do nothing.
027 * </p>
028 *
029 * @version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 f??vr. 2011) $
030 * @since 2.0
031 */
032 public class DefaultRealMatrixPreservingVisitor implements RealMatrixPreservingVisitor {
033
034 /** {@inheritDoc} */
035 public void start(int rows, int columns,
036 int startRow, int endRow, int startColumn, int endColumn) {
037 }
038
039 /** {@inheritDoc} */
040 public void visit(int row, int column, double value)
041 throws MatrixVisitorException {
042 }
043
044 /** {@inheritDoc} */
045 public double end() {
046 return 0;
047 }
048
049 }