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+/* DefaultTableModel.java --
+   Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.table;
+
+import java.io.Serializable;
+import java.util.Vector;
+
+import javax.swing.event.TableModelEvent;
+
+/**
+ * A two dimensional data structure used to store <code>Object</code>
+ * instances, usually for display in a <code>JTable</code> component.
+ *
+ * @author      Andrew Selkirk
+ */
+public class DefaultTableModel extends AbstractTableModel
+  implements Serializable
+{
+  static final long serialVersionUID = 6680042567037222321L;
+
+  /**
+   * Storage for the rows in the table (each row is itself
+   * a <code>Vector</code>).
+   */
+  protected Vector dataVector;
+
+  /**
+   * Storage for the column identifiers.
+   */
+  protected Vector columnIdentifiers;
+
+  /**
+   * Creates an empty table with zero rows and zero columns.
+   */
+  public DefaultTableModel()
+  {
+    this(0, 0);
+  }
+
+  /**
+   * Creates a new table with the specified number of rows and columns.
+   * All cells in the table are initially empty (set to <code>null</code>).
+   *
+   * @param numRows  the number of rows.
+   * @param numColumns  the number of columns.
+   */
+  public DefaultTableModel(int numRows, int numColumns)
+  {
+    Vector defaultNames = new Vector(numColumns);
+    Vector data = new Vector(numRows);
+    for (int i = 0; i < numColumns; i++)
+      {
+        defaultNames.add(super.getColumnName(i));
+      }
+    for (int r = 0; r < numRows; r++)
+      {
+        Vector tmp = new Vector(numColumns);
+        tmp.setSize(numColumns);
+        data.add(tmp);
+      }
+    setDataVector(data, defaultNames);
+  }
+
+  /**
+   * Creates a new table with the specified column names and number of
+   * rows.  The number of columns is determined by the number of column
+   * names supplied.
+   *
+   * @param columnNames the column names.
+   * @param numRows the number of rows.
+   */
+  public DefaultTableModel(Vector columnNames, int numRows)
+  {
+    if (numRows < 0)
+      throw new IllegalArgumentException("numRows < 0");
+    Vector data = new Vector();
+    int numColumns = 0;
+
+    if (columnNames != null)
+      numColumns = columnNames.size();
+
+    while (0 < numRows--)
+      {
+        Vector rowData = new Vector();
+        rowData.setSize(numColumns);
+        data.add(rowData);
+      }
+    setDataVector(data, columnNames);
+  }
+
+  /**
+   * Creates a new table with the specified column names and row count.
+   *
+   * @param columnNames the column names.
+   * @param numRows the number of rows.
+   */
+  public DefaultTableModel(Object[] columnNames, int numRows)
+  {
+    this(convertToVector(columnNames), numRows);
+  }
+
+  /**
+   * Creates a new table with the specified data values and column names.
+   *
+   * @param data the data values.
+   * @param columnNames the column names.
+   */
+  public DefaultTableModel(Vector data, Vector columnNames)
+  {
+    setDataVector(data, columnNames);
+  }
+
+  /**
+   * Creates a new table with the specified data values and column names.
+   *
+   * @param data the data values.
+   * @param columnNames the column names.
+   */
+  public DefaultTableModel(Object[][] data, Object[] columnNames)
+  {
+    this(convertToVector(data), convertToVector(columnNames));
+  }
+
+  /**
+   * Returns the vector containing the row data for the table.
+   *
+   * @return The data vector.
+   */
+  public Vector getDataVector()
+  {
+    return dataVector;
+  }
+
+  /**
+   * Sets the data and column identifiers for the table.  The data vector
+   * contains a <code>Vector</code> for each row in the table - if the
+   * number of objects in each row does not match the number of column
+   * names specified, the row data is truncated or expanded (by adding
+   * <code>null</code> values) as required.
+   *
+   * @param data the data for the table (a vector of row vectors).
+   * @param columnNames the column names.
+   *
+   * @throws NullPointerException if either argument is <code>null</code>.
+   */
+  public void setDataVector(Vector data, Vector columnNames)
+  {
+    if (data == null)
+      dataVector = new Vector();
+    else
+      dataVector = data;
+    setColumnIdentifiers(columnNames);
+  }
+
+  /**
+   * Sets the data and column identifiers for the table.
+   *
+   * @param data the data for the table.
+   * @param columnNames the column names.
+   *
+   * @throws NullPointerException if either argument is <code>null</code>.
+   */
+  public void setDataVector(Object[][] data, Object[] columnNames)
+  {
+    setDataVector(convertToVector(data),
+                  convertToVector(columnNames));
+  }
+
+  /**
+   * Sends the specified <code>event</code> to all registered listeners.
+   * This method is equivalent to
+   * {@link AbstractTableModel#fireTableChanged(TableModelEvent)}.
+   *
+   * @param event the event.
+   */
+  public void newDataAvailable(TableModelEvent event)
+  {
+    fireTableChanged(event);
+  }
+
+  /**
+   * Sends the specified <code>event</code> to all registered listeners.
+   * This method is equivalent to
+   * {@link AbstractTableModel#fireTableChanged(TableModelEvent)}.
+   *
+   * @param event the event.
+   */
+  public void newRowsAdded(TableModelEvent event)
+  {
+    fireTableChanged(event);
+  }
+
+  /**
+   * Sends the specified <code>event</code> to all registered listeners.
+   * This method is equivalent to
+   * {@link AbstractTableModel#fireTableChanged(TableModelEvent)}.
+   *
+   * @param event the event.
+   */
+  public void rowsRemoved(TableModelEvent event)
+  {
+    fireTableChanged(event);
+  }
+
+  /**
+   * Sets the column identifiers, updates the data rows (truncating
+   * or padding each row with <code>null</code> values) to match the
+   * number of columns, and sends a {@link TableModelEvent} to all
+   * registered listeners.
+   *
+   * @param columnIdentifiers the column identifiers.
+   */
+  public void setColumnIdentifiers(Vector columnIdentifiers)
+  {
+    this.columnIdentifiers = columnIdentifiers;
+    setColumnCount(columnIdentifiers == null ? 0 : columnIdentifiers.size());
+  }
+
+  /**
+   * Sets the column identifiers, updates the data rows (truncating
+   * or padding each row with <code>null</code> values) to match the
+   * number of columns, and sends a {@link TableModelEvent} to all
+   * registered listeners.
+   *
+   * @param columnIdentifiers the column identifiers.
+   */
+  public void setColumnIdentifiers(Object[] columnIdentifiers)
+  {
+    setColumnIdentifiers(convertToVector(columnIdentifiers));
+  }
+
+  /**
+   * This method is obsolete, use {@link #setRowCount(int)} instead.
+   *
+   * @param numRows the number of rows.
+   */
+  public void setNumRows(int numRows)
+  {
+    setRowCount(numRows);
+  }
+
+  /**
+   * Sets the number of rows in the table.  If <code>rowCount</code> is less
+   * than the current number of rows in the table, rows are discarded.
+   * If <code>rowCount</code> is greater than the current number of rows in
+   * the table, new (empty) rows are added.
+   *
+   * @param rowCount the row count.
+   */
+  public void setRowCount(int rowCount)
+  {
+    int existingRowCount = dataVector.size();
+    if (rowCount < existingRowCount)
+    {
+      dataVector.setSize(rowCount);
+      fireTableRowsDeleted(rowCount, existingRowCount - 1);
+    }
+    else
+    {
+      int rowsToAdd = rowCount - existingRowCount;
+      addExtraRows(rowsToAdd, columnIdentifiers.size());
+      fireTableRowsInserted(existingRowCount, rowCount - 1);
+    }
+  }
+
+  /**
+   * Sets the number of columns in the table.  Existing rows are truncated
+   * or padded with <code>null</code> values to match the new column count.
+   * A {@link TableModelEvent} is sent to all registered listeners.
+   *
+   * @param columnCount the column count.
+   */
+  public void setColumnCount(int columnCount)
+  {
+    for (int i = 0; i < dataVector.size(); ++i)
+      {
+        ((Vector) dataVector.get(i)).setSize(columnCount);
+      }
+    if (columnIdentifiers != null)
+      columnIdentifiers.setSize(columnCount);
+    fireTableStructureChanged();
+  }
+
+  /**
+   * Adds a column with the specified name to the table.  All cell values
+   * for the column are initially set to <code>null</code>.
+   *
+   * @param columnName the column name (<code>null</code> permitted).
+   */
+  public void addColumn(Object columnName)
+  {
+    addColumn(columnName, (Object[]) null);
+  }
+
+  /**
+   * Adds a column with the specified name and data values to the table.
+   *
+   * @param columnName the column name (<code>null</code> permitted).
+   * @param columnData the column data.
+   */
+  public void addColumn(Object columnName, Vector columnData)
+  {
+    Object[] dataArray = null;
+    if (columnData != null)
+    {
+      int rowCount = dataVector.size();
+      if (columnData.size() < rowCount)
+        columnData.setSize(rowCount);
+      dataArray = columnData.toArray();
+    }
+    addColumn(columnName, dataArray);
+  }
+
+  /**
+   * Adds a column with the specified name and data values to the table.
+   *
+   * @param columnName the column name (<code>null</code> permitted).
+   * @param columnData the column data.
+   */
+  public void addColumn(Object columnName, Object[] columnData)
+  {
+    if (columnData != null)
+    {
+      // check columnData array for cases where the number of items
+      // doesn't match the number of rows in the existing table
+      if (columnData.length > dataVector.size())
+      {
+        int rowsToAdd = columnData.length - dataVector.size();
+        addExtraRows(rowsToAdd, columnIdentifiers.size());
+      }
+      else if (columnData.length < dataVector.size())
+      {
+        Object[] tmp = new Object[dataVector.size()];
+        System.arraycopy(columnData, 0, tmp, 0, columnData.length);
+        columnData = tmp;
+      }
+    }
+    for (int i = 0; i < dataVector.size(); ++i)
+      {
+        ((Vector) dataVector.get(i)).add(columnData == null ? null : columnData[i]);
+      }
+    columnIdentifiers.add(columnName);
+    fireTableStructureChanged();
+  }
+
+  /**
+   * Adds a new row containing the specified data to the table and sends a
+   * {@link TableModelEvent} to all registered listeners.
+   *
+   * @param rowData the row data (<code>null</code> permitted).
+   */
+  public void addRow(Vector rowData)
+  {
+    int rowIndex = dataVector.size();
+    dataVector.add(rowData);
+    newRowsAdded(new TableModelEvent(
+      this, rowIndex, rowIndex, -1, TableModelEvent.INSERT)
+    );
+  }
+
+  /**
+   * Adds a new row containing the specified data to the table and sends a
+   * {@link TableModelEvent} to all registered listeners.
+   *
+   * @param rowData the row data (<code>null</code> permitted).
+   */
+  public void addRow(Object[] rowData)
+  {
+    addRow(convertToVector(rowData));
+  }
+
+  /**
+   * Inserts a new row into the table.
+   *
+   * @param row the row index.
+   * @param rowData the row data.
+   */
+  public void insertRow(int row, Vector rowData)
+  {
+    dataVector.add(row, rowData);
+    fireTableRowsInserted(row, row);
+  }
+
+  /**
+   * Inserts a new row into the table.
+   *
+   * @param row the row index.
+   * @param rowData the row data.
+   */
+  public void insertRow(int row, Object[] rowData)
+  {
+    insertRow(row, convertToVector(rowData));
+  }
+
+  /**
+   * Moves the rows from <code>startIndex</code> to <code>endIndex</code>
+   * (inclusive) to the specified row.
+   *
+   * @param startIndex the start row.
+   * @param endIndex the end row.
+   * @param toIndex the row to move to.
+   */
+  public void moveRow(int startIndex, int endIndex, int toIndex)
+  {
+    Vector removed = new Vector();
+    for (int i = endIndex; i >= startIndex; i--)
+    {
+      removed.add(this.dataVector.remove(i));
+    }
+    for (int i = 0; i <= endIndex - startIndex; i++)
+    {
+      dataVector.insertElementAt(removed.get(i), toIndex);
+    }
+    int firstRow = Math.min(startIndex, toIndex);
+    int lastRow = Math.max(endIndex, toIndex + (endIndex - startIndex));
+    fireTableRowsUpdated(firstRow, lastRow);
+  }
+
+  /**
+   * Removes a row from the table and sends a {@link TableModelEvent} to
+   * all registered listeners.
+   *
+   * @param row the row index.
+   */
+  public void removeRow(int row)
+  {
+    dataVector.remove(row);
+    fireTableRowsDeleted(row, row);
+  }
+
+  /**
+   * Returns the number of rows in the model.
+   *
+   * @return The row count.
+   */
+  public int getRowCount()
+  {
+    return dataVector.size();
+  }
+
+  /**
+   * Returns the number of columns in the model.
+   *
+   * @return The column count.
+   */
+  public int getColumnCount()
+  {
+    return columnIdentifiers == null ? 0 : columnIdentifiers.size();
+  }
+
+  /**
+   * Get the name of the column. If the column has the column identifier set,
+   * the return value is the result of the .toString() method call on that
+   * identifier. If the identifier is not explicitly set, the returned value
+   * is calculated by {@link AbstractTableModel#getColumnName(int)}.
+   *
+   * @param column the column index.
+   *
+   * @return The column name.
+   */
+  public String getColumnName(int column)
+  {
+    String result = "";
+    if (columnIdentifiers == null)
+      result = super.getColumnName(column);
+    else
+    {
+      if (column < getColumnCount())
+      {
+        checkSize();
+        Object id = columnIdentifiers.get(column);
+        if (id != null)
+          result = id.toString();
+        else
+          result = super.getColumnName(column);
+      }
+      else
+        result = super.getColumnName(column);
+    }
+    return result;
+  }
+
+  /**
+   * Returns <code>true</code> if the specified cell can be modified, and
+   * <code>false</code> otherwise.  For this implementation, the method
+   * always returns <code>true</code>.
+   *
+   * @param row the row index.
+   * @param column the column index.
+   *
+   * @return <code>true</code> in all cases.
+   */
+  public boolean isCellEditable(int row, int column)
+  {
+    return true;
+  }
+
+  /**
+   * Returns the value at the specified cell in the table.
+   *
+   * @param row the row index.
+   * @param column the column index.
+   *
+   * @return The value (<code>Object</code>, possibly <code>null</code>) at
+   *         the specified cell in the table.
+   */
+  public Object getValueAt(int row, int column)
+  {
+    return ((Vector) dataVector.get(row)).get(column);
+  }
+
+  /**
+   * Sets the value for the specified cell in the table and sends a
+   * {@link TableModelEvent} to all registered listeners.
+   *
+   * @param value the value (<code>Object</code>, <code>null</code> permitted).
+   * @param row the row index.
+   * @param column the column index.
+   */
+  public void setValueAt(Object value, int row, int column)
+  {
+    ((Vector) dataVector.get(row)).set(column, value);
+    fireTableCellUpdated(row, column);
+  }
+
+  /**
+   * Converts the data array to a <code>Vector</code>.
+   *
+   * @param data the data array (<code>null</code> permitted).
+   *
+   * @return A vector (or <code>null</code> if the data array
+   *         is <code>null</code>).
+   */
+  protected static Vector convertToVector(Object[] data)
+  {
+    if (data == null)
+      return null;
+    Vector vector = new Vector(data.length);
+    for (int i = 0; i < data.length; i++)
+      vector.add(data[i]);
+    return vector;
+  }
+
+  /**
+   * Converts the data array to a <code>Vector</code> of rows.
+   *
+   * @param data the data array (<code>null</code> permitted).
+   *
+   * @return A vector (or <code>null</code> if the data array
+   *         is <code>null</code>.
+   */
+  protected static Vector convertToVector(Object[][] data)
+  {
+    if (data == null)
+      return null;
+    Vector vector = new Vector(data.length);
+    for (int i = 0; i < data.length; i++)
+      vector.add(convertToVector(data[i]));
+    return vector;
+  }
+
+  /**
+   * This method adds some rows to <code>dataVector</code>.
+   *
+   * @param rowsToAdd number of rows to add
+   * @param nbColumns size of the added rows
+   */
+  private void addExtraRows(int rowsToAdd, int nbColumns)
+  {
+    for (int i = 0; i < rowsToAdd; i++)
+      {
+        Vector tmp = new Vector();
+        tmp.setSize(columnIdentifiers.size());
+        dataVector.add(tmp);
+      }
+  }
+
+  /**
+   * Checks the real columns/rows sizes against the ones returned by
+   * <code>getColumnCount()</code> and <code>getRowCount()</code>.
+   * If the supposed one are bigger, then we grow <code>columIdentifiers</code>
+   * and <code>dataVector</code> to their expected size.
+   */
+  private void checkSize()
+  {
+    int columnCount = getColumnCount();
+    int rowCount = getRowCount();
+
+    if (columnCount > columnIdentifiers.size())
+      columnIdentifiers.setSize(columnCount);
+
+    if (dataVector != null && rowCount > dataVector.size())
+      {
+        int rowsToAdd = rowCount - dataVector.size();
+        addExtraRows(rowsToAdd, columnCount);
+      }
+  }
+}