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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This is the stable version. Apart from bugfixes, this version
does not receive any other updates.
/*
* 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see {
/** the value to sort. */
protected Comparable m_Value;
/** the index of the value. */
protected int m_Index;
/**
* Initializes the container.
*
* @param value the value to sort on
* @param index the original index
*/
public SortContainer(Comparable value, int index) {
super();
m_Value = value;
m_Index = index;
}
/**
* Returns the value to sort on.
*
* @return the value
*/
public Comparable getValue() {
return m_Value;
}
/**
* Returns the original index of the item.
*
* @return the index
*/
public int getIndex() {
return m_Index;
}
/**
* Compares this object with the specified object for order. Returns a
* negative integer, zero, or a positive integer as this object is less
* than, equal to, or greater than the specified object. Null is considered
* smallest. If both values are null, then 0 is returned.
*
* @param o the object to be compared.
* @return a negative integer, zero, or a positive integer as this object is
* less than, equal to, or greater than the specified object.
* @throws ClassCastException if the specified object's type prevents it
* from being compared to this object.
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public int compareTo(SortContainer o) {
if ((m_Value == null) || (o.getValue() == null)) {
if (m_Value == o.getValue()) {
return 0;
}
if (m_Value == null) {
return -1;
} else {
return +1;
}
} else {
return ((Comparable) m_Value).compareTo(o.getValue());
}
}
/**
* Indicates whether some other object is "equal to" this one.
*
* @param obj the reference object with which to compare.
* @return true if this object is the same as the obj argument; false
* otherwise.
* @throws ClassCastException if the specified object's type prevents it
* from being compared to this object.
*/
@Override
public boolean equals(Object obj) {
return (compareTo((SortContainer) obj) == 0);
}
/**
* Returns a string representation of the sort container.
*
* @return the string representation (value + index)
*/
@Override
public String toString() {
return "value=" + m_Value + ", index=" + m_Index;
}
}
/** the actual table model */
protected TableModel mModel;
/** the mapping between displayed and actual index */
protected int[] mIndices;
/** the sort column */
protected int mSortColumn;
/** whether sorting is ascending or descending */
protected boolean mAscending;
/**
* initializes with no model
*/
public SortedTableModel() {
this(null);
}
/**
* initializes with the given model
*
* @param model the model to initialize the sorted model with
*/
public SortedTableModel(TableModel model) {
setModel(model);
}
/**
* sets the model to use
*
* @param value the model to use
*/
public void setModel(TableModel value) {
mModel = value;
// initialize indices
if (mModel == null) {
mIndices = null;
} else {
initializeIndices();
mSortColumn = -1;
mAscending = true;
mModel.addTableModelListener(this);
}
}
/**
* (re-)initializes the indices
*/
protected void initializeIndices() {
int i;
mIndices = new int[mModel.getRowCount()];
for (i = 0; i < mIndices.length; i++) {
mIndices[i] = i;
}
}
/**
* returns the current model, can be null
*
* @return the current model
*/
public TableModel getModel() {
return mModel;
}
/**
* returns whether the table was sorted
*
* @return true if the table was sorted
*/
public boolean isSorted() {
return (mSortColumn > -1);
}
/**
* whether the model is initialized
*
* @return true if the model is not null and the sort indices match the number
* of rows
*/
protected boolean isInitialized() {
return (getModel() != null);
}
/**
* Returns the actual underlying row the given visible one represents. Useful
* for retrieving "non-visual" data that is also stored in a TableModel.
*
* @param visibleRow the displayed row to retrieve the original row for
* @return the original row
*/
public int getActualRow(int visibleRow) {
if (!isInitialized()) {
return -1;
} else {
return mIndices[visibleRow];
}
}
/**
* Returns the most specific superclass for all the cell values in the column.
*
* @param columnIndex the index of the column
* @return the class of the specified column
*/
@Override
public Class getColumnClass(int columnIndex) {
if (!isInitialized()) {
return null;
} else {
return getModel().getColumnClass(columnIndex);
}
}
/**
* Returns the number of columns in the model
*
* @return the number of columns in the model
*/
@Override
public int getColumnCount() {
if (!isInitialized()) {
return 0;
} else {
return getModel().getColumnCount();
}
}
/**
* Returns the name of the column at columnIndex
*
* @param columnIndex the column to retrieve the name for
* @return the name of the specified column
*/
@Override
public String getColumnName(int columnIndex) {
if (!isInitialized()) {
return null;
} else {
return getModel().getColumnName(columnIndex);
}
}
/**
* Returns the number of rows in the model.
*
* @return the number of rows in the model
*/
@Override
public int getRowCount() {
if (!isInitialized()) {
return 0;
} else {
return getModel().getRowCount();
}
}
/**
* Returns the value for the cell at columnIndex and rowIndex.
*
* @param rowIndex the row
* @param columnIndex the column
* @return the value of the sepcified cell
*/
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
if (!isInitialized()) {
return null;
} else {
return getModel().getValueAt(mIndices[rowIndex], columnIndex);
}
}
/**
* Returns true if the cell at rowIndex and columnIndex is editable.
*
* @param rowIndex the row
* @param columnIndex the column
* @return true if the cell is editable
*/
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
if (!isInitialized()) {
return false;
} else {
return getModel().isCellEditable(mIndices[rowIndex], columnIndex);
}
}
/**
* Sets the value in the cell at columnIndex and rowIndex to aValue.
*
* @param aValue the new value of the cell
* @param rowIndex the row
* @param columnIndex the column
*/
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
if (isInitialized()) {
getModel().setValueAt(aValue, mIndices[rowIndex], columnIndex);
}
}
/**
* sorts the table over the given column (ascending)
*
* @param columnIndex the column to sort over
*/
public void sort(int columnIndex) {
sort(columnIndex, true);
}
/**
* sorts the table over the given column, either ascending or descending
*
* @param columnIndex the column to sort over
* @param ascending ascending if true, otherwise descending
*/
public void sort(int columnIndex, boolean ascending) {
int columnType;
int i;
ArrayList sorted;
SortContainer cont;
Object value;
// can we sort?
if ((!isInitialized()) || (getModel().getRowCount() != mIndices.length)) {
System.out.println(this.getClass().getName()
+ ": Table model not initialized!");
return;
}
// init
mSortColumn = columnIndex;
mAscending = ascending;
initializeIndices();
// determine the column type: 0=string/other, 1=comparable
if (ClassDiscovery.hasInterface(Comparable.class,
getColumnClass(mSortColumn))) {
columnType = 1;
} else {
columnType = 0;
}
// create list for sorting
sorted = new ArrayList();
for (i = 0; i < getRowCount(); i++) {
value = mModel.getValueAt(mIndices[i], mSortColumn);
if (columnType == 0) {
cont = new SortContainer((value == null) ? null : value.toString(),
mIndices[i]);
} else {
cont = new SortContainer((Comparable) value, mIndices[i]);
}
sorted.add(cont);
}
Collections.sort(sorted);
for (i = 0; i < sorted.size(); i++) {
if (mAscending) {
mIndices[i] = sorted.get(i).getIndex();
} else {
mIndices[i] = sorted.get(sorted.size() - 1 - i).getIndex();
}
}
sorted.clear();
sorted = null;
}
/**
* This fine grain notification tells listeners the exact range of cells,
* rows, or columns that changed.
*
* @param e the event
*/
@Override
public void tableChanged(TableModelEvent e) {
initializeIndices();
if (isSorted()) {
sort(mSortColumn, mAscending);
}
fireTableChanged(e);
}
/**
* Adds a mouselistener to the header: left-click on the header sorts in
* ascending manner, using shift-left-click in descending manner.
*
* @param table the table to add the listener to
*/
public void addMouseListenerToHeader(JTable table) {
final SortedTableModel modelFinal = this;
final JTable tableFinal = table;
tableFinal.setColumnSelectionAllowed(false);
JTableHeader header = tableFinal.getTableHeader();
if (header != null) {
MouseAdapter listMouseListener = new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
TableColumnModel columnModel = tableFinal.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = tableFinal.convertColumnIndexToModel(viewColumn);
if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 1
&& !e.isAltDown() && column != -1) {
int shiftPressed = e.getModifiers() & InputEvent.SHIFT_MASK;
boolean ascending = (shiftPressed == 0);
modelFinal.sort(column, ascending);
}
}
};
header.addMouseListener(listMouseListener);
}
}
}