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- package com.vaadin.terminal.gwt.widgetsetutils;
-
- import java.io.PrintWriter;
- import java.util.Collection;
- import java.util.Date;
-
- 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.TreeLogger.Type;
- import com.google.gwt.core.ext.typeinfo.JClassType;
- import com.google.gwt.core.ext.typeinfo.TypeOracle;
- import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
- import com.google.gwt.user.rebind.SourceWriter;
- import com.vaadin.event.dd.acceptCriteria.AcceptCriterion;
- import com.vaadin.event.dd.acceptCriteria.ClientCriterion;
- import com.vaadin.terminal.gwt.client.ui.dd.VAcceptCriterion;
- import com.vaadin.ui.ClientWidget;
-
- /**
- * GWT generator to build WidgetMapImpl dynamically based on
- * {@link ClientWidget} annotations available in workspace.
- *
- */
- public class AcceptCriterionGenerator extends Generator {
-
- private String packageName;
- private String className;
-
- @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);
- packageName = classType.getPackage().getName();
- className = classType.getSimpleSourceName() + "Impl";
- // Generate class source code
- generateClass(logger, context);
- } catch (Exception e) {
- logger.log(TreeLogger.ERROR,
- "Accept criterion factory creation failed", e);
- }
- // return the fully qualifed name of the class generated
- return packageName + "." + className;
- }
-
- /**
- * Generate source code for WidgetMapImpl
- *
- * @param logger
- * Logger object
- * @param context
- * Generator context
- */
- private void generateClass(TreeLogger logger, GeneratorContext context) {
- // get print writer that receives the source code
- PrintWriter printWriter = null;
- printWriter = context.tryCreate(logger, packageName, className);
- // print writer if null, source code has ALREADY been generated,
- // return (WidgetMap is equal to all permutations atm)
- if (printWriter == null) {
- return;
- }
- logger.log(Type.INFO, "Detecting available criteria ...");
- Date date = new Date();
-
- // init composer, set class properties, create source writer
- ClassSourceFileComposerFactory composer = null;
- composer = new ClassSourceFileComposerFactory(packageName, className);
- composer.addImport("com.google.gwt.core.client.GWT");
- composer
- .setSuperclass("com.vaadin.terminal.gwt.client.ui.dd.VAcceptCriterionFactory");
- SourceWriter sourceWriter = composer.createSourceWriter(context,
- printWriter);
-
- // generator constructor source code
- generateInstantiatorMethod(sourceWriter, context, logger);
- // close generated class
- sourceWriter.outdent();
- sourceWriter.println("}");
- // commit generated class
- context.commit(logger, printWriter);
- logger.log(Type.INFO, "Done. ("
- + (new Date().getTime() - date.getTime()) / 1000 + "seconds)");
-
- }
-
- private void generateInstantiatorMethod(SourceWriter sourceWriter,
- GeneratorContext context, TreeLogger logger) {
-
- sourceWriter.println("public VAcceptCriterion get(String name) {");
- sourceWriter.indent();
-
- sourceWriter.println("name = name.intern();");
-
- Collection<Class<? extends AcceptCriterion>> clientSideVerifiableCriterion = ClassPathExplorer
- .getCriterion();
-
- for (Class<? extends AcceptCriterion> class1 : clientSideVerifiableCriterion) {
- String canonicalName = class1.getCanonicalName();
- Class<? extends VAcceptCriterion> clientClass = class1
- .getAnnotation(ClientCriterion.class).value();
- sourceWriter.print("if (\"");
- sourceWriter.print(canonicalName);
- sourceWriter.print("\" == name) return GWT.create(");
- sourceWriter.print(clientClass.getCanonicalName());
- sourceWriter.println(".class );");
- sourceWriter.print("else ");
- }
-
- sourceWriter.println("return null;");
- sourceWriter.outdent();
- sourceWriter.println("}");
- }
-
- }
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