com.google.gwt.uibinder.elementparsers.HasTreeItemsParser Maven / Gradle / Ivy
/*
* Copyright 2010 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.uibinder.elementparsers;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.uibinder.rebind.FieldWriter;
import com.google.gwt.uibinder.rebind.UiBinderWriter;
import com.google.gwt.uibinder.rebind.XMLElement;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.Widget;
/**
* Parses {@link com.google.gwt.user.client.ui.Tree} widgets.
*/
public class HasTreeItemsParser implements ElementParser {
static final String BAD_CHILD = "Only TreeItem or Widget subclasses are valid children";
public void parse(XMLElement elem, String fieldName, JClassType type,
UiBinderWriter writer) throws UnableToCompleteException {
// Prepare base types.
JClassType itemType = writer.getOracle().findType(TreeItem.class.getName());
JClassType widgetType = writer.getOracle().findType(Widget.class.getName());
JClassType isWidgetType = writer.getOracle().findType(IsWidget.class.getName());
// Parse children.
for (XMLElement child : elem.consumeChildElements()) {
JClassType childType = writer.findFieldType(child);
// TreeItem+
if (itemType.isAssignableFrom(childType)) {
FieldWriter childField = writer.parseElementToField(child);
writer.addStatement("%1$s.addItem(%2$s);", fieldName,
childField.getNextReference());
continue;
}
// Widget+ or IsWidget+
if (widgetType.isAssignableFrom(childType)
|| isWidgetType.isAssignableFrom(childType)) {
FieldWriter childField = writer.parseElementToField(child);
writer.addStatement("%1$s.addItem(%2$s);", fieldName,
childField.getNextReference());
continue;
}
// Fail
writer.die(child, BAD_CHILD);
}
}
}