defaulttablemodel.java

gcc的组建

      int rowsToAdd = rowCount - existingRowCount;
      for (int i = 0; i < rowsToAdd; i++) 
        {
          Vector tmp = new Vector();
          tmp.setSize(columnIdentifiers.size());
          dataVector.add(tmp);
        } 
      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();
        for (int i = 0; i < rowsToAdd; i++) 
        {
          Vector tmp = new Vector();
          tmp.setSize(columnIdentifiers.size());
          dataVector.add(tmp);
        }
      }
      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());
  }

  /**
   * Returns the name of the specified column.
   * 
   * @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())
      {  
        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;
  }
}