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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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.vaadin.server.widgetsetutils.metadata;
import java.util.Collection;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.TreeLogger.Type;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.JMethod;
import com.vaadin.client.ui.AbstractComponentConnector;
import com.vaadin.shared.annotations.DelegateToWidget;
public class WidgetInitVisitor extends TypeVisitor {
@Override
public void visitConnector(TreeLogger logger, JClassType type,
ConnectorBundle bundle) throws UnableToCompleteException {
if (ConnectorBundle.isConnectedComponentConnector(type)) {
// The class in which createWidget is implemented
JClassType createWidgetClass = ConnectorBundle.findInheritedMethod(
type, "createWidget").getEnclosingType();
JMethod getWidget = ConnectorBundle.findInheritedMethod(type,
"getWidget");
JClassType widgetType = getWidget.getReturnType().isClass();
// Needs GWT constructor if createWidget is not overridden
if (createWidgetClass.getQualifiedSourceName().equals(
AbstractComponentConnector.class.getCanonicalName())) {
bundle.setNeedsGwtConstructor(widgetType);
// Also needs widget type to find the right GWT constructor
bundle.setNeedsReturnType(type, getWidget);
}
// Check state properties for @DelegateToWidget
JMethod getState = ConnectorBundle.findInheritedMethod(type,
"getState");
JClassType stateType = getState.getReturnType().isClass();
Collection<Property> properties = bundle.getProperties(stateType);
for (Property property : properties) {
DelegateToWidget delegateToWidget = property
.getAnnotation(DelegateToWidget.class);
if (delegateToWidget != null) {
// Generate meta data required for @DelegateToWidget
bundle.setNeedsDelegateToWidget(property, stateType);
// Find the delegate target method
String methodName = DelegateToWidget.Helper
.getDelegateTarget(property.getName(),
delegateToWidget.value());
JMethod delegatedSetter = ConnectorBundle
.findInheritedMethod(widgetType, methodName,
property.getPropertyType());
if (delegatedSetter == null) {
logger.log(
Type.ERROR,
widgetType.getName()
+ "."
+ methodName
+ "("
+ property.getPropertyType()
.getSimpleSourceName()
+ ") required by @DelegateToWidget for "
+ stateType.getName() + "."
+ property.getName()
+ " can not be found.");
throw new UnableToCompleteException();
}
bundle.setNeedsInvoker(widgetType, delegatedSetter);
// GWT code needs widget type to find the target method
bundle.setNeedsReturnType(type, getWidget);
}
}
}
}
}
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