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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.tests.widgetset.rebind;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;
import com.vaadin.client.metadata.Invoker;
import com.vaadin.tests.widgetset.client.TestWidgetConnector;
import com.vaadin.tests.widgetset.client.TestWidgetConnector.TestWidgetRegistry;
public class TestWidgetRegistryGenerator extends Generator {
@Override
public String generate(TreeLogger logger, GeneratorContext context,
String typeName) throws UnableToCompleteException {
try {
TypeOracle typeOracle = context.getTypeOracle();
// get classType and save instance variables
JClassType classType = typeOracle.getType(typeName);
String packageName = classType.getPackage().getName();
String className = classType.getSimpleSourceName() + "Impl";
// Generate class source code
generateClass(packageName, className, logger, context);
return packageName + "." + className;
} catch (Exception e) {
logger.log(TreeLogger.ERROR,
"Accept criterion factory creation failed", e);
throw new UnableToCompleteException();
}
// return the fully qualifed name of the class generated
}
private void generateClass(String packageName, String className,
TreeLogger logger, GeneratorContext context) {
PrintWriter printWriter = context.tryCreate(logger, packageName,
className);
// print writer if null, source code has ALREADY been generated
if (printWriter == null) {
return;
}
// init composer, set class properties, create source writer
ClassSourceFileComposerFactory composer = null;
composer = new ClassSourceFileComposerFactory(packageName, className);
composer.setSuperclass(TestWidgetRegistry.class.getCanonicalName());
List<JClassType> testWidgets = findTestWidgets(logger,
context.getTypeOracle());
SourceWriter w = composer.createSourceWriter(context, printWriter);
w.println("public %s() {", className);
w.indent();
w.println("super();");
w.println();
for (JClassType testWidgetType : testWidgets) {
w.println("register(\"%s\", new %s() {",
escape(testWidgetType.getQualifiedSourceName()),
Invoker.class.getCanonicalName());
w.indent();
w.println("public Object invoke(Object target, Object... params) {");
w.indent();
w.println("return new %s();",
testWidgetType.getQualifiedSourceName());
w.outdent();
w.println("}");
w.outdent();
w.println("});");
w.println();
}
// Close constructor
w.outdent();
w.println("}");
// Close class body
w.outdent();
w.println("}");
// commit generated class
context.commit(logger, printWriter);
}
private List<JClassType> findTestWidgets(TreeLogger logger,
TypeOracle typeOracle) {
List<JClassType> testWidgetTypes = new ArrayList<JClassType>();
JClassType[] widgetTypes = typeOracle.findType(Widget.class.getName())
.getSubtypes();
for (JClassType widgetType : widgetTypes) {
if (isTestWidget(widgetType)) {
testWidgetTypes.add(widgetType);
}
}
return testWidgetTypes;
}
private boolean isTestWidget(JClassType widgetType) {
if (widgetType.isAbstract()) {
return false;
} else if (!widgetType.getPackage().getName()
.startsWith(TestWidgetConnector.class.getPackage().getName())) {
return false;
} else if (widgetType.getEnclosingType() != null
&& !widgetType.isStatic()) {
return false;
}
return true;
}
}
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