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/*
 * Copyright (C) 2007 Sun Microsystems, Inc. All rights reserved. Use is
 * subject to license terms.
 */

package org.jdesktop.swingbinding;

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import org.jdesktop.beansbinding.BindingListener;
import org.jdesktop.beansbinding.Binding.*;
import org.jdesktop.beansbinding.AutoBinding;
import org.jdesktop.beansbinding.Property;
import org.jdesktop.beansbinding.PropertyStateEvent;
import org.jdesktop.beansbinding.PropertyStateListener;
import org.jdesktop.swingbinding.impl.AbstractColumnBinding;
import org.jdesktop.swingbinding.impl.ListBindingManager;
import static org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.*;

/**
 * Binds a {@code List} of objects to act as the rows of a {@code JTable}.
 * Each object in the source {@code List} represents one row in the {@code JTable}.
 * Mappings from properties of the source objects to columns are created by
 * adding {@link org.jdesktop.swingbinding.JTableBinding.ColumnBinding ColumnBindings}
 * to a {@code JTableBinding}. Instances of {@code JTableBinding} are obtained by
 * calling one of the {@code createJTableBinding} methods in the {@code SwingBindings}
 * class.
 * 

* Here is an example of creating a binding from a {@code List} of {@code Person} * objects to a {@code JTable}: *

*


 *    // create the person List
 *    List people = createPersonList();
 *
 *    // create the binding from List to JTable
 *    JTableBinding tb = SwingBindings.createJTableBinding(READ, people, jTable);
 *
 *    // define the properties to be used for the columns
 *    BeanProperty firstNameP = BeanProperty.create("firstName");
 *    BeanProperty lastNameP = BeanProperty.create("lastName");
 *    BeanProperty ageP = BeanProperty.create("age");
 *
 *    // configure how the properties map to columns
 *    tb.addColumnBinding(firstNameP).setColumnName("First Name");
 *    tb.addColumnBinding(lastNameP).setColumnName("Last Name");
 *    tb.addColumnBinding(ageP).setColumnName("Age").setColumnClass(Integer.class);
 *
 *    // realize the binding
 *    tb.bind();
 * 
*

* The {@code JTable} target of a {@code JTableBinding} acts as a live view of * the objects in the source {@code List}, * regardless of the update strategy (the meaning of the update strategy is * clarified later in this document). {@code JTableBinding} * listens to the properties specified for the {@code ColumnBindings}, * for all objects in the {@code List}, and updates the values * displayed in the {@code JTable} in response to change. All successful * edits made to {@code JTable} cell values are immediately committed back to * corresponding objects in the source {@code List}. If the {@code List} is an * instance of {@code ObservableList}, then changes to the {@code List} contents * (such as adding, removing or replacing an object) are also reflected in the * {@code JTable}. Important: Changing the contents of a non-observable * {@code List} while it is participating in a {@code JTableBinding} is unsupported, * resulting in undefined behavior and possible exceptions. *

* A cell in the {@code JTable} is editable for any given row and * column when all of the following are true: the property specified for that column * by its {@code ColumnBinding} is writeable for the object representing that row, * the {@code "editable"} property of the {@code JTableBinding} is {@code true} * (the default), and the {@code "editable"} property of the {@code ColumnBinding} * is {@code true} (the default). *

* {@code JTableBinding} requires * extra clarification on the operation of the * {@code refresh} and {@code save} methods and the meaning of the update * strategy. The target property of a {@code JTableBinding} is not the * target {@code JTable} property provided in the constructor, but rather a * private synthetic property representing the {@code List} of objects to show * in the target {@code JTable}. This synthetic property is readable/writeable * only when the {@code JTableBinding} is bound and the target {@code JTable} * property is readable with a {@code non-null} value. *

* It is this private synthetic property on which the {@code refresh} and * {@code save} methods operate; meaning that these methods simply cause syncing * between the value of the source {@code List} property and the value of the * synthetic target property (representing the {@code List} to be shown in the * target {@code JTable}). These methods do not, therefore, have anything to do * with refreshing or saving values in the {@code JTable}. Likewise, the update * strategy, which simply controls when {@code refresh} and {@code save} are * automatically called, also has nothing to do with refreshing or saving * values in the {@code JTable}. *

* Note: At the current time, the {@code READ_WRITE} update strategy * is not useful for {@code JTableBinding}. To prevent unwanted confusion, * {@code READ_WRITE} is translated to {@code READ} by {@code JTableBinding's} * constructor. *

* {@code JTableBinding} works by installing a custom model on the target * {@code JTable}, as appropriate, to represent the source {@code List}. The * model is installed on a target {@code JTable} with the first succesful call * to {@code refresh} with that {@code JTable} as the target. Subsequent calls * to {@code refresh} update the elements in this already-installed model. * The model is uninstalled from a target {@code JTable} when either the * {@code JTableBinding} is unbound or when the target {@code JTable} property * changes to no longer represent that {@code JTable}. Note: When the model is * uninstalled from a {@code JTable}, it is replaced with a {@code DefaultTableModel}, * in order to leave the {@code JTable} functional. *

* Some of the above is easier to understand with an example. Let's consider * a {@code JTableBinding} ({@code binding}), with update strategy * {@code READ}, between a property representing a {@code List} ({@code listP}) * and a property representing a {@code JTable} ({@code jTableP}). {@code listP} * and {@code jTableP} both start off readable, referring to a {@code non-null} * {@code List} and {@code non-null} {@code JTable} respectively. Let's look at * what happens for each of a sequence of events: *

*

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
SequenceEventResult
1explicit call to {@code binding.bind()} * - synthetic target property becomes readable/writeable *
* - {@code refresh()} is called *
* - model is installed on target {@code JTable}, representing list of objects *
2{@code listP} changes to a new {@code List} * - {@code refresh()} is called *
* - model is updated with new list of objects *
3{@code jTableP} changes to a new {@code JTable} * - model is uninstalled from old {@code JTable} *
4explicit call to {@code binding.refresh()} * - model is installed on target {@code JTable}, representing list of objects *
5{@code listP} changes to a new {@code List} * - {@code refresh()} is called *
* - model is updated with new list of objects *
6explicit call to {@code binding.unbind()} * - model is uninstalled from target {@code JTable} *
*

* Notice that in step 3, when the value * of the {@code JTable} property changed, the new {@code JTable} did not * automatically get the model with the elements applied to it. A change to the * target value should not cause an {@code AutoBinding} to sync the target from * the source. Step 4 forces a sync by explicitly calling {@code refresh}. * Alternatively, it could be caused by any other action that results * in a {@code refresh} (for example, the source property changing value, or an * explicit call to {@code unbind} followed by {@code bind}). *

* {@code ColumnBindings} are managed by the {@code JTableBinding}. They are not * to be explicitly bound, unbound, added to a {@code BindingGroup}, or accessed * in a way that is not allowed for a managed binding. {@code BindingListeners} * added to a {@code ColumnBinding} are notified at the time an edited {@code JTable} value * is to be committed back to the source {@code List}. They receive notification of either * {@code synced} or {@code syncFailed}. {@code BindingListeners} added to the * {@code JTableBinding} itself are also notified of {@code sync} and {@code syncFailed} * for the {@code JTableBinding's ColumnBindings}. *

* In addition to binding the elements of a {@code JTable}, it is possible to * bind to the selection of a {@code JTable}. When binding to the selection of a {@code JTable} * backed by a {@code JTableBinding}, the selection is always in terms of elements * from the source {@code List}. See the list of * interesting swing properties in the package summary for more details. * * @param the type of elements in the source {@code List} * @param the type of source object (on which the source property resolves to {@code List}) * @param the type of target object (on which the target property resolves to {@code JTable}) * * @author Shannon Hickey */ public final class JTableBinding extends AutoBinding, TS, List> { private Property tableP; private ElementsProperty elementsP; private Handler handler = new Handler(); private JTable table; private BindingTableModel model; private boolean editable = true; private List columnBindings = new ArrayList(); /** * Constructs an instance of {@code JTableBinding}. * * @param strategy the update strategy * @param sourceObject the source object * @param sourceListProperty a property on the source object that resolves to the {@code List} of elements * @param targetObject the target object * @param targetJTableProperty a property on the target object that resolves to a {@code JTable} * @param name a name for the {@code JTableBinding} * @throws IllegalArgumentException if the source property or target property is {@code null} */ protected JTableBinding(UpdateStrategy strategy, SS sourceObject, Property> sourceListProperty, TS targetObject, Property targetJTableProperty, String name) { super(strategy == READ_WRITE ? READ : strategy, sourceObject, sourceListProperty, targetObject, new ElementsProperty(), name); if (targetJTableProperty == null) { throw new IllegalArgumentException("target JTable property can't be null"); } tableP = targetJTableProperty; elementsP = (ElementsProperty)getTargetProperty(); } protected void bindImpl() { elementsP.setAccessible(isTableAccessible()); tableP.addPropertyStateListener(getTargetObject(), handler); elementsP.addPropertyStateListener(null, handler); super.bindImpl(); } protected void unbindImpl() { elementsP.removePropertyStateListener(null, handler); tableP.removePropertyStateListener(getTargetObject(), handler); elementsP.setAccessible(false); cleanupForLast(); super.unbindImpl(); } private boolean isTableAccessible() { return tableP.isReadable(getTargetObject()) && tableP.getValue(getTargetObject()) != null; } private boolean isTableAccessible(Object value) { return value != null && value != PropertyStateEvent.UNREADABLE; } private void cleanupForLast() { if (table == null) { return; } table.setModel(new DefaultTableModel()); table = null; model.setElements(null, true); model = null; } /** * Sets whether or not the cells of the table should be editable. * The default for this property is {@code true}. * See this paragraph in the class level * documentation on editability. * * @param editable whether or not the cells of the table should be editable */ public void setEditable(boolean editable) { this.editable = editable; } /** * Returns whether or not the cells of the table should be editable. * The default for this property is {@code true}. * See this paragraph in the class level * documentation on editability. * * @return whether or not the cells of the table should be editable */ public boolean isEditable() { return editable; } /** * Creates a {@code ColumnBinding} and adds it to the end of the list of {@code ColumnBindings} * maintained by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param columnProperty the property with which to derive cell values from the * elements of the source {@code List} * @return the {@code ColumnBinding} * @throws IllegalArgumentException if {@code columnProperty} is {@code null} * @see org.jdesktop.swingbinding.JTableBinding.ColumnBinding */ public ColumnBinding addColumnBinding(Property columnProperty) { return addColumnBinding(columnProperty, null); } /** * Creates a named {@code ColumnBinding} and adds it to the end of the list of {@code ColumnBindings} * maintained by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param columnProperty the property with which to derive cell values from the * elements of the source {@code List} * @param name a name for the column binding * @return the {@code ColumnBinding} * @throws IllegalArgumentException if {@code columnProperty} is {@code null} * @see org.jdesktop.swingbinding.JTableBinding.ColumnBinding */ public ColumnBinding addColumnBinding(Property columnProperty, String name) { throwIfBound(); if (columnProperty == null) { throw new IllegalArgumentException("can't have null column property"); } if (name == null && JTableBinding.this.getName() != null) { name = JTableBinding.this.getName() + ".COLUMN_BINDING"; } ColumnBinding binding = new ColumnBinding(columnBindings.size(), columnProperty, name); columnBindings.add(binding); return binding; } /** * Creates a {@code ColumnBinding} and inserts it at the given index into the list * of {@code ColumnBindings} maintained by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param index the index at which to insert the {@code ColumnBinding} * @param columnProperty the property with which to derive cell values from the * elements of the source {@code List} * @return the {@code ColumnBinding} * @throws IllegalArgumentException if {@code columnProperty} is {@code null} * @see org.jdesktop.swingbinding.JTableBinding.ColumnBinding */ public ColumnBinding addColumnBinding(int index, Property columnProperty) { return addColumnBinding(index, columnProperty, null); } /** * Creates a {@code ColumnBinding} and inserts it at the given index into the list * of {@code ColumnBindings} maintained by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param index the index at which to insert the {@code ColumnBinding} * @param columnProperty the property with which to derive cell values from the * elements of the source {@code List} * @param name a name for the {@code ColumnBinding} * @return the {@code ColumnBinding} * @throws IllegalArgumentException if {@code columnProperty} is {@code null} * @see org.jdesktop.swingbinding.JTableBinding.ColumnBinding */ public ColumnBinding addColumnBinding(int index, Property columnProperty, String name) { throwIfBound(); if (columnProperty == null) { throw new IllegalArgumentException("can't have null column property"); } if (name == null && JTableBinding.this.getName() != null) { name = JTableBinding.this.getName() + ".COLUMN_BINDING"; } ColumnBinding binding = new ColumnBinding(index, columnProperty, name); columnBindings.add(index, binding); adjustIndices(index + 1, true); return binding; } /** * Removes the given {@code ColumnBinding} from the list maintained * by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param binding the {@code ColumnBinding} to remove * @see #addColumnBinding(Property, String) */ public boolean removeColumnBinding(ColumnBinding binding) { throwIfBound(); boolean retVal = columnBindings.remove(binding); if (retVal) { adjustIndices(binding.getColumn(), false); } return retVal; } /** * Removes the {@code ColumnBinding} with the given index from the list maintained * by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param index the index of the {@code ColumnBinding} to remove * @see #addColumnBinding(Property, String) */ public ColumnBinding removeColumnBinding(int index) { throwIfBound(); ColumnBinding retVal = columnBindings.remove(index); if (retVal != null) { adjustIndices(index, false); } return retVal; } /** * Returns the {@code ColumnBinding} with the given index in the list maintained * by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @param index the index of the {@code ColumnBinding} to return * @return the {@code ColumnBinding} at the given index * @see #addColumnBinding(Property, String) */ public ColumnBinding getColumnBinding(int index) { return columnBindings.get(index); } /** * Returns an unmodifiable copy of the list of {@code ColumnBindings} maintained * by this {@code JTableBinding}. *

* The list of {@code ColumnBindings} dictates the columns to be displayed in the * {@code JTable}, with a {@code ColumnBinding's} order in the list determining its * table model index. * * @return the list of {@code ColumnBindings} * @see #addColumnBinding(Property, String) */ public List getColumnBindings() { return Collections.unmodifiableList(columnBindings); } private void adjustIndices(int start, boolean up) { int size = columnBindings.size(); for (int i = start; i < size; i++) { ColumnBinding cb = columnBindings.get(i); cb.adjustColumn(cb.getColumn() + (up ? 1 : -1)); } } private final class ColumnProperty extends Property { private ColumnBinding binding; public Class getWriteType(Object source) { return binding.columnClass == null ? Object.class : binding.columnClass; } public Object getValue(Object source) { if (binding.isBound()) { return binding.editingObject; } throw new UnsupportedOperationException(); } public void setValue(Object source, Object value) { throw new UnsupportedOperationException(); } public boolean isReadable(Object source) { return binding.isBound(); } public boolean isWriteable(Object source) { return true; } public void addPropertyStateListener(Object source, PropertyStateListener listener) { } public void removePropertyStateListener(Object source, PropertyStateListener listener) { } public PropertyStateListener[] getPropertyStateListeners(Object source) { return new PropertyStateListener[0]; } } /** * {@code ColumnBinding} represents a binding between a property of the elements * in the {@code JTableBinding's} source {@code List}, and a column in the table. Each * {@code ColumnBinding} added to a {@code JTableBinding} represents a column * to be displayed by the {@code JTable}. A value for any given row in a column * is aquired by fetching the value of the associated {@code ColumnBinding's} * source property for the element in the source {@code List} representing that row. *

* A {@code Converter} may be specified on a {@code ColumnBinding}, as may be * a {@code Validator}. Validation occurs at the time a cell value is to be * committed back to the source {@code List}. *

* {@code BindingListeners} registered on * a {@code ColumnBinding} are notified of successful {@code sync} or * {@code syncFailure}. These notifications are also sent to the * {@code JTableBinding's} {@code BindingListeners}. *

* {@code ColumnBindings} are managed by their {@code JTableBinding}. They are not * to be explicitly bound, unbound, added to a {@code BindingGroup}, or accessed * in a way that is not allowed for a managed binding. * * @see org.jdesktop.swingbinding.JTableBinding#addColumnBinding(Property, String) */ public final class ColumnBinding extends AbstractColumnBinding { private Class columnClass; private boolean editable = true; private boolean editableSet; private String columnName; private Object editingObject; private ColumnBinding(int column, Property columnProperty, String name) { super(column, columnProperty, new ColumnProperty(), name); ((ColumnProperty) getTargetProperty()).binding = this; } private void setEditingObject(Object editingObject) { this.editingObject = editingObject; } private void adjustColumn(int newCol) { setColumn(newCol); } /** * Sets a name for the column represented by this {@code ColumnBinding}. * This is used to initialize the table's column header name. If * {@code null} is specified, the {@code toString()} value of the * {@code ColumnBinding's} source property is used. * * @param name the name * @return the {@code ColumnBinding} itself, to allow for method chaining * @see javax.swing.table.TableModel#getColumnName */ public ColumnBinding setColumnName(String name) { JTableBinding.this.throwIfBound(); this.columnName = name; return this; } /** * Sets the column class to be used by {@code JTable} to determine * the renderer and editor for the column represented by this * {@code ColumnBinding}. * * @param columnClass the column class * @return the {@code ColumnBinding} itself, to allow for method chaining * @see javax.swing.table.TableModel#getColumnClass */ public ColumnBinding setColumnClass(Class columnClass) { JTableBinding.this.throwIfBound(); this.columnClass = columnClass; return this; } /** * Returns the column class to be used by {@code JTable} to determine * the renderer and editor for the column represented by this * {@code ColumnBinding}. * * @see #setColumnClass * @see javax.swing.table.TableModel#getColumnClass */ public Class getColumnClass() { return columnClass == null ? Object.class : columnClass; } /** * Returns the name for the column represented by this {@code ColumnBinding}. * This is used to initialize the table's column header name. If no name * has been specified, or if it has been set to {@code null}, the * {@code toString()} value of the {@code ColumnBinding's} source property is returned. * * @return the name for the column * @see #setColumnName * @see javax.swing.table.TableModel#getColumnName */ public String getColumnName() { return columnName == null ? getSourceProperty().toString() : columnName; } /** * Sets whether or not the cells of the column should be editable. * The default for this property is {@code true}. * See this paragraph in the class level * documentation on editability. * * @param editable whether or not the cells of the column should be editable * @return the {@code ColumnBinding} itself, to allow for method chaining */ public ColumnBinding setEditable(boolean editable) { this.editable = editable; return this; } /** * Returns whether or not the cells of the column should be editable. * The default for this property is {@code true}. * See this paragraph in the class level * documentation on editability. * * @return whether or not the cells of the column should be editable */ public boolean isEditable() { return editable; } private void bindUnmanaged0() { bindUnmanaged(); } private void unbindUnmanaged0() { unbindUnmanaged(); } private SyncFailure saveUnmanaged0() { return saveUnmanaged(); } private void setSourceObjectUnmanaged0(Object source) { setSourceObjectUnmanaged(source); } } private class Handler implements PropertyStateListener { public void propertyStateChanged(PropertyStateEvent pse) { if (!pse.getValueChanged()) { return; } if (pse.getSourceProperty() == tableP) { cleanupForLast(); boolean wasAccessible = isTableAccessible(pse.getOldValue()); boolean isAccessible = isTableAccessible(pse.getNewValue()); if (wasAccessible != isAccessible) { elementsP.setAccessible(isAccessible); } else if (elementsP.isAccessible()) { elementsP.setValueAndIgnore(null, null); } } else { if (((ElementsProperty.ElementsPropertyStateEvent)pse).shouldIgnore()) { return; } if (table == null) { table = tableP.getValue(getTargetObject()); model = new BindingTableModel(); table.setModel(model); } model.setElements((List)pse.getNewValue(), true); } } } private final class BindingTableModel extends ListBindingManager implements TableModel { private final List listeners; public BindingTableModel() { listeners = new CopyOnWriteArrayList(); } protected AbstractColumnBinding[] getColBindings() { AbstractColumnBinding[] bindings = new AbstractColumnBinding[getColumnBindings().size()]; bindings = getColumnBindings().toArray(bindings); return bindings; } public int getRowCount() { return size(); } public Object getValueAt(int rowIndex, int columnIndex) { return valueAt(rowIndex, columnIndex); } public void setValueAt(Object value, int rowIndex, int columnIndex) { ColumnBinding cb = JTableBinding.this.getColumnBinding(columnIndex); BindingListener[] cbListeners = cb.getBindingListeners(); BindingListener[] tbListeners = getBindingListeners(); cb.setSourceObjectUnmanaged0(this.getElement(rowIndex)); cb.setEditingObject(value); cb.bindUnmanaged0(); for (BindingListener listener : tbListeners) { listener.bindingBecameBound(cb); } PropertyStateEvent pse = new PropertyStateEvent(cb.getTargetProperty(), cb.getTargetObject(), true, getValueAt(rowIndex, columnIndex), value, false, cb.getSourceProperty().isWriteable(cb.getSourceObject())); for (BindingListener listener : cbListeners) { listener.targetChanged(cb, pse); } for (BindingListener listener : tbListeners) { listener.targetChanged(cb, pse); } SyncFailure failure = cb.saveUnmanaged0(); if (failure == null) { for (BindingListener listener : cbListeners) { listener.synced(cb); } for (BindingListener listener : tbListeners) { listener.synced(cb); } } else { for (BindingListener listener : cbListeners) { listener.syncFailed(cb, failure); } for (BindingListener listener : tbListeners) { listener.syncFailed(cb, failure); } } cb.unbindUnmanaged0(); for (BindingListener listener : tbListeners) { listener.bindingBecameUnbound(cb); } cb.setEditingObject(null); cb.setSourceObjectUnmanaged0(null); } public Class getColumnClass(int columnIndex) { Class klass = JTableBinding.this.getColumnBinding(columnIndex).getColumnClass(); return klass == null ? Object.class : klass; } protected void allChanged() { fireTableModelEvent(new TableModelEvent(this, 0, Integer.MAX_VALUE)); } protected void valueChanged(int row, int column) { fireTableModelEvent(new TableModelEvent(this, row, row, column)); } protected void added(int row, int length) { assert length > 0; // enforced by ListBindingManager fireTableModelEvent(new TableModelEvent(this, row, row + length - 1, TableModelEvent.ALL_COLUMNS, TableModelEvent.INSERT)); } protected void removed(int row, int length) { assert length > 0; // enforced by ListBindingManager fireTableModelEvent(new TableModelEvent(this, row, row + length - 1, TableModelEvent.ALL_COLUMNS, TableModelEvent.DELETE)); } protected void changed(int row) { fireTableModelEvent(new TableModelEvent(this, row, row, TableModelEvent.ALL_COLUMNS)); } public String getColumnName(int columnIndex) { ColumnBinding binding = JTableBinding.this.getColumnBinding(columnIndex); return binding.getColumnName() == null ? binding.getSourceProperty().toString() : binding.getColumnName(); } public boolean isCellEditable(int rowIndex, int columnIndex) { if (!JTableBinding.this.isEditable()) { return false; } ColumnBinding binding = JTableBinding.this.getColumnBinding(columnIndex); if (!binding.isEditable()) { return false; } return binding.getSourceProperty().isWriteable(getElement(rowIndex)); } public void addTableModelListener(TableModelListener l) { listeners.add(l); } public void removeTableModelListener(TableModelListener l) { listeners.remove(l); } private void fireTableModelEvent(TableModelEvent e) { for (TableModelListener listener : listeners) { listener.tableChanged(e); } } public int getColumnCount() { return columnCount(); } } }





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