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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below. //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard //
// Scheines, Joseph Ramsey, and Clark Glymour. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program; if not, write to the Free Software //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //
///////////////////////////////////////////////////////////////////////////////
package edu.cmu.tetrad.data;
import edu.cmu.tetrad.graph.Node;
import java.util.ArrayList;
import java.util.List;
/**
* Stores a 2D array of byte data. Note that the missing value marker for this box is -99.
*/
public class ByteDataBox implements DataBox {
private static final long serialVersionUID = 23L;
/**
* The stored byte data.
*/
private final byte[][] data;
/**
* The number of rows (tracked because it may be zero).
*/
private final int numRows;
/**
* The number of columns (tracked because it may be zero).
*/
private final int numCols;
/**
* Constructs an 2D byte array consisting entirely of missing values (-99).
*/
public ByteDataBox(int rows, int cols) {
this.data = new byte[rows][cols];
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
this.data[i][j] = -99;
}
}
this.numRows = rows;
this.numCols = cols;
}
/**
* Constructs a new data box using the given 2D byte data array as data.
*/
public ByteDataBox(byte[][] data) {
int length = data[0].length;
for (byte[] datum : data) {
if (datum.length != length) {
throw new IllegalArgumentException("All rows must have same length.");
}
}
this.numCols = data[0].length;
this.numRows = data.length;
this.data = data;
}
/**
* Generates a simple exemplar of this class to test serialization.
*/
public static BoxDataSet serializableInstance() {
List vars = new ArrayList<>();
for (int i = 0; i < 4; i++) vars.add(new ContinuousVariable("X" + i));
return new BoxDataSet(new ShortDataBox(4, 4), vars);
}
/**
* @return the number of rows in this data box.
*/
public int numRows() {
return this.numRows;
}
/**
* @return the number of columns in this data box.n
*/
public int numCols() {
return this.numCols;
}
/**
* Sets the value at the given row/column to the given Number value. The value used is number.byteValue().
*/
public void set(int row, int col, Number value) {
if (value == null) {
synchronized (this.data) {
this.data[row][col] = -99;
}
} else {
synchronized (this.data) {
this.data[row][col] = value.byteValue();
}
}
}
/**
* @return the Number value at the given row and column. If the value is missing (-99), null, is returned.
*/
public Number get(int row, int col) {
byte datum = this.data[row][col];
if (datum == -99) {
return null;
} else {
return datum;
}
}
/**
* @return a copy of this data box.
*/
public DataBox copy() {
ByteDataBox box = new ByteDataBox(numRows(), numCols());
for (int i = 0; i < numRows(); i++) {
for (int j = 0; j < numCols(); j++) {
box.set(i, j, get(i, j));
}
}
return box;
}
/**
* @return a DataBox of type ByteDataBox, but with the given dimensions.
*/
public DataBox like() {
int[] rows = new int[numRows()];
int[] cols = new int[numCols()];
for (int i = 0; i < numRows(); i++) rows[i] = i;
for (int j = 0; j < numCols(); j++) cols[j] = j;
return viewSelection(rows, cols);
}
@Override
public DataBox viewSelection(int[] rows, int[] cols) {
DataBox _dataBox = new ByteDataBox(rows.length, cols.length);
for (int i = 0; i < rows.length; i++) {
for (int j = 0; j < cols.length; j++) {
_dataBox.set(i, j, get(rows[i], cols[j]));
}
}
return _dataBox;
}
}