Common.UI JFX: Support for Stream-based TreeTables

Issue-Ref: 3541
Issue-Url: https://af3-developer.fortiss.org/issues/3541


Signed-off-by: Alexander Diewald <diewald@fortiss.org>

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings

-DynamicList.java 6206ef9150c1f4bf07102820ae2a647ec3fb882b YELLOW
+DynamicList.java 786300e2e914826da239329d190abea1710478ea YELLOW
 DynamicListContentProvider.java 817cba44f246a361207a88ef9a4e1869215803f7 YELLOW
+DynamicStreamContentProvider.java f46e91400609cba54793dd240be0fe2aa0d5cced YELLOW
 DynamicTreeContentProviderBase.java 6760a6dc5721175b1dada8f30fd9da05f7bcc4b3 GREEN
 DynamicTreeItem.java 7486071d20e896d6ca9a9101bf105caccf3656d0 YELLOW
 DynamicTreeItemBase.java d883066ecc181120302ca32f328538de7a45b093 YELLOW
 DynamicTreeTableUIProviderBase.java f78c0f8b52fbc939166b3f94f7f6006cc0f4d32b GREEN
-DynamicTreeTableViewer.java 048e242856e2ac56969711d2698bdbb2c4235704 YELLOW
+DynamicTreeTableViewer.java 8ce7fdb68560aab27bc2dbe4d3c52c4447cd8906 YELLOW
 DynamicTreeUIProviderBase.java e9b68607683de279d0cb8712a28dc131c5c33ece GREEN
 DynamicTreeViewer.java 7b22b9a99b7d34bfffdadd99db630bb683187d7f YELLOW
 DynamicTreeViewerBase.java a2013538b62d86f6a09efdf2cd78babac2072484 GREEN

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicList.java

@@ -17,6 +17,8 @@ package org.fortiss.tooling.common.ui.javafx.control.treetableview;
 
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
 
 import javafx.scene.control.TreeItem;
 
@@ -28,7 +30,18 @@ public class DynamicList<T> extends DynamicTreeItemBase<T> {
 	/** The viewer. */
 	private DynamicTreeContentProviderBase<T> contentProvider;
 
-	/** Constructor. */
+	/**
+	 * Constructor. The given {@link Supplier} is queried on updates to retrieve a recent list of
+	 * elements to display.
+	 */
+	@SuppressWarnings("unchecked")
+	public DynamicList(Supplier<Stream<T>> data,
+			DynamicStreamContentProvider<T, Supplier<Stream<T>>> contentProvider) {
+		super((T)data);
+		this.contentProvider = contentProvider;
+	}
+
+	/** Constructor. The given collection must be updated by the initializer to reflect changes. */
 	@SuppressWarnings("unchecked")
 	public DynamicList(Collection<T> data, DynamicTreeContentProviderBase<T> contentProvider) {
 		super((T)data);

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicStreamContentProvider.java

+/*-------------------------------------------------------------------------+
+| Copyright 2020 fortiss GmbH                                              |
+|                                                                          |
+| Licensed under the Apache License, Version 2.0 (the "License");          |
+| you may not use this file except in compliance with the License.         |
+| You may obtain a copy of the License at                                  |
+|                                                                          |
+|    http://www.apache.org/licenses/LICENSE-2.0                            |
+|                                                                          |
+| Unless required by applicable law or agreed to in writing, software      |
+| distributed under the License is distributed on an "AS IS" BASIS,        |
+| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+| See the License for the specific language governing permissions and      |
+| limitations under the License.                                           |
++--------------------------------------------------------------------------*/
+package org.fortiss.tooling.common.ui.javafx.control.treetableview;
+
+import static java.util.Collections.emptyList;
+import static java.util.stream.Collectors.toList;
+
+import java.util.Collection;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
+
+/**
+ * Content provider whose element list is dynamically retrieved from a supplier.
+ * 
+ * @author diewald
+ */
+public class DynamicStreamContentProvider<T, S extends Supplier<Stream<T>>>
+		extends DynamicTreeContentProviderBase<T> {
+
+	/** {@inheritDoc} */
+	@Override
+	protected Collection<? extends T> getChildren(T parent) {
+		if(parent instanceof Supplier) {
+			@SuppressWarnings("unchecked") Supplier<Stream<T>> supp = ((S)parent);
+			return supp.get().collect(toList());
+		}
+		return emptyList();
+	}
+}

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeTableViewer.java

@@ -18,6 +18,8 @@ package org.fortiss.tooling.common.ui.javafx.control.treetableview;
 import static java.lang.Integer.MAX_VALUE;
 
 import java.util.Collection;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
 
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.scene.control.SelectionMode;
@@ -47,7 +49,21 @@ public final class DynamicTreeTableViewer<T> extends DynamicTreeViewerBase<T> {
 	/** The UI provider of this tree-table. */
 	private final DynamicTreeTableUIProviderBase<T> uiProvider;
 
-	/** Constructor. */
+	/**
+	 * Constructor. The given {@link Supplier} is queried on updates to obtain a list of elements to
+	 * display.
+	 */
+	public DynamicTreeTableViewer(TreeTableView<T> view, Supplier<Stream<T>> listFctn,
+			DynamicStreamContentProvider<T, Supplier<Stream<T>>> contentProvider,
+			DynamicTreeTableUIProviderBase<T> uiProvider) {
+		this(view, new DynamicList<T>(listFctn, contentProvider), false, 0, contentProvider,
+				uiProvider);
+	}
+
+	/**
+	 * Constructor. The given input collection must be updated by the caller such that changes are
+	 * reflected in the corresponding {@link TreeTableView}.
+	 */
 	public DynamicTreeTableViewer(TreeTableView<T> view, Collection<T> list,
 			DynamicListContentProvider<T> contentProvider,
 			DynamicTreeTableUIProviderBase<T> uiProvider) {