| /* |
| * Copyright 2011 Google Inc. |
| * |
| * 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 com.google.gwt.editor.client.impl; |
| |
| import com.google.gwt.editor.client.EditorContext; |
| import com.google.gwt.editor.client.EditorDelegate; |
| import com.google.gwt.editor.client.EditorVisitor; |
| import com.google.gwt.editor.client.LeafValueEditor; |
| import com.google.gwt.editor.client.ValueAwareEditor; |
| |
| import java.util.Stack; |
| |
| /** |
| * Copies data from the Editor hierarchy into the backing objects. |
| */ |
| class Flusher extends EditorVisitor { |
| private final Stack<AbstractEditorDelegate<?, ?>> delegateStack = new Stack<AbstractEditorDelegate<?, ?>>(); |
| |
| @Override |
| public <Q> void endVisit(EditorContext<Q> ctx) { |
| // Flush ValueAware editors |
| ValueAwareEditor<Q> asValue = ctx.asValueAwareEditor(); |
| |
| AbstractEditorDelegate<?, ?> delegate; |
| if (ctx.getEditorDelegate() == null) { |
| delegate = delegateStack.peek(); |
| } else { |
| delegate = delegateStack.pop(); |
| } |
| assert delegate != null; |
| |
| if (asValue != null) { |
| if (delegate.shouldFlush()) { |
| asValue.flush(); |
| } |
| } |
| |
| // Pull value from LeafValueEditors and update edited object |
| LeafValueEditor<Q> asLeaf = ctx.asLeafValueEditor(); |
| if (delegate.shouldFlush() && asLeaf != null && ctx.canSetInModel()) { |
| ctx.setInModel(asLeaf.getValue()); |
| } |
| } |
| |
| @Override |
| public <Q> boolean visit(EditorContext<Q> ctx) { |
| EditorDelegate<Q> editorDelegate = ctx.getEditorDelegate(); |
| if (editorDelegate != null) { |
| delegateStack.push((AbstractEditorDelegate<?, ?>) editorDelegate); |
| } |
| return true; |
| } |
| } |