| /* |
| * 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.math.linear; |
| |
| import org.apache.commons.math.linear.MatrixVisitorException; |
| |
| /** |
| * Interface defining a visitor for matrix entries. |
| * |
| * @see DefaultRealMatrixPreservingVisitor |
| * @version $Revision: 1073158 $ $Date: 2011-02-21 22:46:52 +0100 (lun. 21 févr. 2011) $ |
| * @since 2.0 |
| */ |
| public interface RealMatrixPreservingVisitor { |
| |
| /** |
| * Start visiting a matrix. |
| * <p>This method is called once before any entry of the matrix is visited.</p> |
| * @param rows number of rows of the matrix |
| * @param columns number of columns of the matrix |
| * @param startRow Initial row index |
| * @param endRow Final row index (inclusive) |
| * @param startColumn Initial column index |
| * @param endColumn Final column index (inclusive) |
| */ |
| void start(int rows, int columns, |
| int startRow, int endRow, int startColumn, int endColumn); |
| |
| /** |
| * Visit one matrix entry. |
| * @param row row index of the entry |
| * @param column column index of the entry |
| * @param value current value of the entry |
| * @throws MatrixVisitorException if something wrong occurs |
| */ |
| void visit(int row, int column, double value) |
| throws MatrixVisitorException; |
| |
| /** |
| * End visiting a matrix. |
| * <p>This method is called once after all entries of the matrix have been visited.</p> |
| * @return the value that the <code>walkInXxxOrder</code> must return |
| */ |
| double end(); |
| |
| } |