List of usage examples for com.google.gwt.core.ext.typeinfo JMethod getErasedParameterTypes
JType[] getErasedParameterTypes();
From source file:org.senchalabs.gwt.gwtdriver.SeExporterGenerator.java
License:Apache License
@Override public String generate(TreeLogger logger, GeneratorContext context, String typeName) throws UnableToCompleteException { TypeOracle oracle = context.getTypeOracle(); JClassType jso = oracle.findType(Name.getSourceNameForClass(JavaScriptObject.class)); JClassType toGenerate = oracle.findType(typeName).isClass(); String packageName = toGenerate.getPackage().getName(); String simpleSourceName = toGenerate.getName().replace('.', '_') + "Impl"; PrintWriter pw = context.tryCreate(logger, packageName, simpleSourceName); if (pw == null) { return packageName + "." + simpleSourceName; }/*from w w w . ja va2 s . com*/ ClassSourceFileComposerFactory factory = new ClassSourceFileComposerFactory(packageName, simpleSourceName); factory.setSuperclass(typeName); SourceWriter sw = factory.createSourceWriter(context, pw); List<String> exportedTypes; try { exportedTypes = context.getPropertyOracle().getConfigurationProperty(SELENIUM_METHODS).getValues(); } catch (BadPropertyValueException e) { logger.log(TreeLogger.Type.ERROR, "Can't find any config property for " + SELENIUM_METHODS + " declared", e); throw new UnableToCompleteException(); } sw.println("protected void exportRegisteredTypes() {"); sw.indent(); //for each type set up in a config property, for (String exportedType : exportedTypes) { JClassType toExport = oracle.findType(exportedType); if (toExport == null) { logger.log(TreeLogger.Type.ERROR, "Cannot find " + exportedType + " be sure it is a valid GWT type"); throw new UnableToCompleteException(); } MethodsFor refersToType = toExport.getAnnotation(MethodsFor.class); if (refersToType == null) { logger.log(Type.ERROR, "Type " + exportedType + " is declared as having webdriver methods, but has no @MethodsFor annotation"); throw new UnableToCompleteException(); } //verify a default ctor - if not, methods must be static boolean requireStatic = toExport.getConstructors().length != 0 && toExport.findConstructor(new JType[] {}) == null; if (requireStatic) { logger.log(Type.INFO, "No default constructor found, all marked methods must be static"); } TreeLogger typeLogger = logger.branch(TreeLogger.Type.DEBUG, "Exporting methods in " + exportedType); //iterate through the methods for (JMethod m : toExport.getInheritableMethods()) { Method refersToMethod = m.getAnnotation(Method.class); if (refersToMethod == null) { continue; } TreeLogger methodLogger = typeLogger.branch(Type.DEBUG, "Examining " + m.getName()); if (requireStatic && !m.isStatic()) { typeLogger.log(Type.ERROR, "No default constructor found for " + exportedType + ", can't export instance method" + m.getName()); typeLogger.log(Type.ERROR, "Either mark the method as static, or ensure there is a default constructor."); throw new UnableToCompleteException(); } //verify that the method matches exactly one method in the webdriver side //TODO make this a little faster String matchingMethod = null; for (java.lang.reflect.Method exportableMethod : refersToType.value().getMethods()) { if (refersToMethod.value().equals(exportableMethod.getName())) { if (matchingMethod != null) { methodLogger.log(Type.ERROR, "Multiple methods found that match " + refersToMethod.value()); throw new UnableToCompleteException(); } matchingMethod = refersToMethod.value(); } } if (matchingMethod == null) { methodLogger.log(Type.ERROR, "Can't find a method that matches " + refersToMethod.value()); throw new UnableToCompleteException(); } //emit a registerFunction call wrapping it sw.println("registerFunction(\"%1$s\", \"%2$s\", new %3$s() {", escape(refersToType.value().getName()), escape(matchingMethod), Name.getSourceNameForClass(Function.class)); sw.indent(); sw.println("public Object apply(%1$s<?> args) {", Name.getSourceNameForClass(JsArray.class)); sw.indent(); JType retType = m.getReturnType(); if (retType.isPrimitive() != null) { switch (retType.isPrimitive()) { case VOID: //do nothing break; case INT: case DOUBLE: case BOOLEAN: sw.print("return \"\" + "); break; default: methodLogger.log(Type.ERROR, "Can't return primitive " + retType + " from exported method"); throw new UnableToCompleteException(); } } else if (retType.isClass() != null && retType.getQualifiedSourceName().equals("java.lang.String") || ((retType.isClass() != null) && retType.isClass().isAssignableTo(jso)) || ((retType.isInterface() != null) && oracle.getSingleJsoImplInterfaces().contains(retType))) { sw.print("return "); } else { methodLogger.log(Type.ERROR, "Can't return non-jso, non-supported primitive " + retType + " from exported method"); throw new UnableToCompleteException(); } if (m.isStatic()) { sw.print(exportedType); } else { sw.print("%1$s.<%2$s>create(%2$s.class)", GWT.class.getName(), exportedType); } sw.print(".%1$s(", matchingMethod); //iterate through the arguments //verify the arg type is legal JType[] erasedParameterTypes = m.getErasedParameterTypes(); for (int i = 0; i < erasedParameterTypes.length; i++) { JType type = erasedParameterTypes[i]; if (type.isPrimitive() != null || type.getQualifiedSourceName().equals("java.lang.String")) { //cast uglyness sw.print("args.<%2$s>cast().get(%1$d)", i, getJsArray(type)); } else if (type.isClass() != null && type.isClass().isAssignableTo(jso)) { //normal array plus cast() trickery sw.print("args.get(%1$d).<%2$s>cast()", i, type.getQualifiedSourceName()); } else if (type.isInterface() != null && oracle.getSingleJsoImplInterfaces().contains(type.isInterface())) { //single jso cast thing sw.print("args.get(%1$d).<%2$s>cast()", i, oracle.getSingleJsoImpl(type.isInterface()).getQualifiedSourceName()); } else {//TODO goktug's magic new jsinterface methodLogger.log(Type.ERROR, "Can't handle argument of type " + type); throw new UnableToCompleteException(); } if (i != erasedParameterTypes.length - 1) { sw.println(","); } } sw.println(");"); if (m.getReturnType() == JPrimitiveType.VOID) { sw.println("return null;"); } sw.outdent(); sw.println("}"); sw.outdent(); sw.println("});"); } } sw.outdent(); sw.println("}"); sw.commit(logger); return factory.getCreatedClassName(); }