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; 019 020 021 /** 022 * Interface defining very basic matrix operations. 023 * @version $Revision: 772119 $ $Date: 2009-05-06 05:43:28 -0400 (Wed, 06 May 2009) $ 024 * @since 2.0 025 */ 026 public interface AnyMatrix { 027 028 /** 029 * Is this a square matrix? 030 * @return true if the matrix is square (rowDimension = columnDimension) 031 */ 032 boolean isSquare(); 033 034 /** 035 * Returns the number of rows in the matrix. 036 * 037 * @return rowDimension 038 */ 039 int getRowDimension(); 040 041 /** 042 * Returns the number of columns in the matrix. 043 * 044 * @return columnDimension 045 */ 046 int getColumnDimension(); 047 048 }