| /******************************************************************************* |
| * Copyright (c) 2008 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.ui.internal.mappings.db; |
| |
| import java.util.Iterator; |
| import org.eclipse.jpt.core.JpaNode; |
| import org.eclipse.jpt.db.Table; |
| import org.eclipse.jpt.ui.WidgetFactory; |
| import org.eclipse.jpt.ui.internal.widgets.AbstractPane; |
| import org.eclipse.jpt.utility.internal.iterators.EmptyIterator; |
| import org.eclipse.jpt.utility.model.value.PropertyValueModel; |
| import org.eclipse.swt.widgets.Composite; |
| |
| /** |
| * This database object combo handles showing a single or multiple tables' |
| * columns. |
| * |
| * @version 2.0 |
| * @since 2.0 |
| */ |
| public abstract class ColumnCombo<T extends JpaNode> extends AbstractDatabaseObjectCombo<T> |
| { |
| /** |
| * Creates a new <code>ColumnCombo</code>. |
| * |
| * @param parentPane The parent container of this one |
| * @param parent The parent container |
| */ |
| public ColumnCombo(AbstractPane<? extends T> parentPane, |
| Composite parent) { |
| |
| super(parentPane, parent); |
| } |
| |
| /** |
| * Creates a new <code>ColumnCombo</code>. |
| * |
| * @param parentPane The parent container of this one |
| * @param subjectHolder The holder of this pane's subject |
| * @param parent The parent container |
| */ |
| public ColumnCombo(AbstractPane<?> parentPane, |
| PropertyValueModel<? extends T> subjectHolder, |
| Composite parent) { |
| |
| super(parentPane, subjectHolder, parent); |
| } |
| |
| /** |
| * Creates a new <code>ColumnCombo</code>. |
| * |
| * @param subjectHolder The holder of the subject |
| * @param parent The parent container |
| * @param widgetFactory The factory used to create various common widgets |
| */ |
| public ColumnCombo(PropertyValueModel<? extends T> subjectHolder, |
| Composite parent, |
| WidgetFactory widgetFactory) { |
| |
| super(subjectHolder, parent, widgetFactory); |
| } |
| |
| /** |
| * Returns the databas tables that is used to retrieve the column names. |
| * |
| * @return The table of which its columns are displayed in the combo |
| */ |
| protected abstract Table table(); |
| |
| /* |
| * (non-Javadoc) |
| */ |
| @Override |
| protected void tableChanged(Table table) { |
| super.tableChanged(table); |
| |
| if ((subject() != null) && (table() == table)) { |
| doPopulate(); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| */ |
| @Override |
| protected Iterator<String> values() { |
| |
| if (subject() == null) { |
| return EmptyIterator.instance(); |
| } |
| |
| Table table = table(); |
| |
| if (table != null) { |
| return table.columnNames(); |
| } |
| |
| return EmptyIterator.<String>instance(); |
| } |
| } |