/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.datatable;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import com.rapidminer.tools.Tableable;
import com.rapidminer.tools.Tools;
/**
* This abstract data table implementation provides some default implementations for data
* tables like listener handling. The method {@link #fireEvent()} can be used to promote
* changes to all listeners.
*
* In addition, IO methods are also provided by this abstract implementation.
*
* @author Ingo Mierswa
* @version $Id: AbstractDataTable.java,v 1.7 2008/07/07 10:52:20 ingomierswa Exp $
*/
public abstract class AbstractDataTable implements DataTable, Tableable {
/** The list of data table listeners. */
private List<DataTableListener> listeners = new LinkedList<DataTableListener>();
/** The name of the table. */
private String name;
public AbstractDataTable(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String[] getColumnNames() {
String[] result = new String[getNumberOfColumns()];
for (int i = 0; i < result.length; i++)
result[i] = getColumnName(i);
return result;
}
public void addDataTableListener(DataTableListener dataTableListener) {
this.listeners.add(dataTableListener);
}
public void removeDataTableListener(DataTableListener dataTableListener) {
this.listeners.remove(dataTableListener);
}
protected void fireEvent() {
Iterator i = listeners.iterator();
while (i.hasNext()) {
((DataTableListener) i.next()).dataTableUpdated(this);
}
}
public String getValueAsString(DataTableRow row, int column) {
if (isDate(column)) {
return Tools.formatDate(new Date((long)row.getValue(column)));
} else if (isDateTime(column)) {
return Tools.formatDateTime(new Date((long)row.getValue(column)));
} else if (isTime(column)) {
return Tools.formatTime(new Date((long)row.getValue(column)));
} else if (isNominal(column)) {
return mapIndex(column, (int)row.getValue(column));
} else {
return row.getValue(column) + "";
}
}
public void write(PrintWriter out) throws IOException {
out.println("# Generated by " + getName() + "[" + getClass().getName() + "]");
for (int j = 0; j < getNumberOfColumns(); j++) {
out.print((j != 0 ? "\t" : "# ") + getColumnName(j));
}
out.println();
Iterator i = iterator();
while (i.hasNext()) {
DataTableRow row = (DataTableRow) i.next();
for (int j = 0; j < getNumberOfColumns(); j++) {
out.print((j != 0 ? "\t" : "") + getValueAsString(row, j));
}
out.println();
}
out.flush();
}
public boolean containsMissingValues() {
Iterator<DataTableRow> i = iterator();
while (i.hasNext()) {
DataTableRow row = i.next();
for (int j = 0; j < getNumberOfColumns(); j++) {
if (Double.isNaN(row.getValue(j)))
return true;
}
}
return false;
}
public int getRowNumber() {
return getNumberOfRows();
}
public int getColumnNumber() {
return getNumberOfColumns();
}
public String getCell(int row, int column) {
double value = getRow(row).getValue(column);
if (isDate(column)) {
return Tools.formatDate(new Date((long)value));
} else if (isDateTime(column)) {
return Tools.formatDateTime(new Date((long)value));
} else if (isTime(column)) {
return Tools.formatTime(new Date((long)value));
} else if (isNominal(column)) {
return mapIndex(column, (int)value);
} else {
return Tools.formatIntegerIfPossible(value);
}
}
}