com.google.gwt.angular.rebind.AngularGenerator Maven / Gradle / Ivy
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AngularJS integration for GWT
package com.google.gwt.angular.rebind;
import com.google.common.base.Joiner;
import com.google.gwt.angular.client.*;
import com.google.gwt.angular.client.impl.JsModelBase;
import com.google.gwt.angular.client.impl.JsScopeBase;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
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.*;
import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
import com.google.gwt.user.rebind.SourceWriter;
import elemental.json.JsonObject;
import elemental.util.ArrayOf;
import elemental.util.ArrayOfString;
import java.io.PrintWriter;
import java.util.*;
public class AngularGenerator extends Generator {
public static final String IMPL = "Impl";
private static final String SCOPEIMPL = "Jso";
// private static final String FACTORY = "Factory";
private static final String MODELIMPL = "Jso";
private static final String MODULEIMPL = "Impl";
private JClassType scopeType;
private JClassType elementType;
private JClassType gwtElementType;
private JClassType stringType;
private JClassType controllerType;
private JClassType modelType;
private JClassType moduleType;
// private JClassType factoryType;
private JClassType arrayOfType;
@Override
public String generate(TreeLogger logger, GeneratorContext context, String typeName)
throws UnableToCompleteException {
TypeOracle typeOracle = context.getTypeOracle();
scopeType = typeOracle.findType(Scope.class.getName());
elementType = typeOracle.findType(elemental.dom.Element.class.getName());
gwtElementType = typeOracle.findType(com.google.gwt.dom.client.Element.class.getName());
stringType = typeOracle.findType(String.class.getName());
controllerType = typeOracle.findType(AngularController.class.getName());
modelType = typeOracle.findType(Model.class.getName());
moduleType = typeOracle.findType(AngularModule.class.getName());
// factoryType = typeOracle.findType(Factory.class.getName());
arrayOfType = typeOracle.findType(ArrayOf.class.getName());
logger.log(TreeLogger.Type.DEBUG, "Generating " + typeName);
JClassType type = typeOracle.findType(typeName);
if (type.isAssignableTo(controllerType)) {
return generateController(logger, context, typeName, type);
} else if (type.isAssignableTo(scopeType)) {
return generateScope(logger, context, type);
// return generateScopeFactory(logger, context, type);
} else if (type.isAssignableTo(modelType)) {
return generateScope(logger, context, type);
// return generateModelFactory(logger, context, type);
} else if (type.isAssignableTo(moduleType)) {
return generateModule(logger, context, type);
}
logger.log(TreeLogger.Type.ERROR, "Don't know how to create " + typeName);
throw new UnableToCompleteException();
}
// private String generateScopeFactory(TreeLogger logger, GeneratorContext context,
// JClassType type) throws UnableToCompleteException {
// ClassSourceFileComposerFactory fac =
// new ClassSourceFileComposerFactory(type.getPackage().getName(),
// type.getName() + FACTORY);
// fac.addImplementedInterface(factoryType.getQualifiedSourceName());
// fac.addImport(JsJsonObject.class.getName());
// fac.addImport(Util.class.getName());
// PrintWriter pw = context.tryCreate(logger, type.getPackage().getName(),
// type.getName() + FACTORY);
// SourceWriter sw = null;
// String typeName = type.getQualifiedSourceName() + FACTORY;
// if (pw != null) {
// sw = fac.createSourceWriter(context, pw);
// }
// if (sw == null) {
// return typeName;
// }
//
// sw.indent();
// sw.println("public native " + generateScope(logger, context, type) + " create() /*-{");
// sw.indent();
//
//
// sw.println("return {};");
// sw.outdent();
// sw.println("}-*/;");
// sw.outdent();
// sw.commit(logger);
// logger.log(TreeLogger.Type.DEBUG, "Generated " + typeName);
// return typeName;
// }
// private String generateModelFactory(TreeLogger logger, GeneratorContext context,
// JClassType type) throws UnableToCompleteException {
// ClassSourceFileComposerFactory fac =
// new ClassSourceFileComposerFactory(type.getPackage().getName(),
// type.getName() + FACTORY);
// fac.addImplementedInterface(factoryType.getQualifiedSourceName());
// fac.addImport(JsJsonObject.class.getName());
// fac.addImport(Util.class.getName());
// PrintWriter pw = context.tryCreate(logger, type.getPackage().getName(),
// type.getName() + FACTORY);
// SourceWriter sw = null;
// String typeName = type.getQualifiedSourceName() + FACTORY;
// if (pw != null) {
// sw = fac.createSourceWriter(context, pw);
// }
// if (sw == null) {
// return typeName;
// }
//
// sw.indent();
// sw.println("public native " + generateModelType(logger, context, type) + " create() /*-{");
// sw.indent();
//
//
// sw.println("return {};");
// sw.outdent();
// sw.println("}-*/;");
// sw.outdent();
// sw.commit(logger);
// logger.log(TreeLogger.Type.DEBUG, "Generated " + typeName);
// return typeName;
// }
private String generateModule(TreeLogger logger, GeneratorContext context, JClassType type) {
NgDepends deps = type.getAnnotation(NgDepends.class);
String simpleName = type.getName() + MODULEIMPL;
ClassSourceFileComposerFactory fac =
new ClassSourceFileComposerFactory(type.getPackage().getName(),
simpleName);
fac.addImport(GWT.class.getName());
fac.addImport(Util.class.getName());
fac.addImplementedInterface(AngularModule.class.getName());
PrintWriter pw = context.tryCreate(logger, type.getPackage().getName(),
simpleName);
SourceWriter sw = null;
String typeName = type.getQualifiedSourceName() + MODULEIMPL;
if (pw != null) {
sw = fac.createSourceWriter(context, pw);
}
if (sw == null) {
return typeName;
}
sw.indent();
sw.println("public " + simpleName + "() {");
sw.indent();
// init(GWT.create(dep1), GWT.create(dep2))
sw.print("init(");
if (deps != null) {
boolean first = true;
for (Class clazz : deps.value()) {
if (clazz.getAnnotation(NgInject.class) != null) {
if (!first) {
sw.print(",");
} else {
first = false;
}
sw.print("GWT.create(" + clazz.getName() + ".class)");
}
}
}
sw.println(");");
sw.outdent();
sw.println("}");
sw.println();
sw.println("public native void init(Object... args) /*-{");
String modName = type.getSimpleSourceName();
NgName ngName = type.getAnnotation(NgName.class);
if (ngName != null) {
modName = ngName.value();
}
StringBuilder outerDeps = new StringBuilder();
NgNativeDepends nativeDeps = type.getAnnotation(NgNativeDepends.class);
if (nativeDeps != null) {
for (String dep : nativeDeps.value()) {
outerDeps.append("'").append(dep).append("',");
}
}
if (outerDeps.length() > 0) {
outerDeps.setLength(outerDeps.length() - 1);//remove trailing comma
}
sw.println("var module = $wnd.angular.module('" + modName + "', [" + outerDeps + "]);");
if (deps != null) {
int i = 0;
for (Class clazz : deps.value()) {
NgInject ngInject = clazz.getAnnotation(NgInject.class);
if (ngInject != null) {
if (AngularController.class.isAssignableFrom(clazz)) {
sw.println("args[" + i + "].@" + AngularController.class.getName() + "::register" +
"(Lcom/google/gwt/core/client/JavaScriptObject;)(module);");
} else {
sw.println("module.factory('" + ngInject.name() + "', function() {");
sw.indent();
sw.println(" return args[" + i + "];");
sw.outdent();
sw.println("});");
}
} else if (Directive.class.isAssignableFrom(clazz)) {
JClassType dType = context.getTypeOracle().findType(clazz.getName());
for (JMethod method : dType.getMethods()) {
NgDirective ngDirective = method.getAnnotation(NgDirective.class);
if (ngDirective != null) {
sw.print("module.directive('" + ngDirective.value() + "', " +
"function " + method.getName() + "(");
JMethod initMethod = null;
for (JMethod m : dType.getMethods()) {
if (m == method) {
continue;
}
if (m.getName().equals("on" + Character.toUpperCase(method.getName()
.charAt(0)) + method.getName().substring(1))) {
initMethod = m;
break;
}
}
ArrayList params = new ArrayList();
if (initMethod != null) {
for (JParameter param : initMethod.getParameters()) {
JClassType pType = param.getType().isClassOrInterface();
if (pType != null) {
NgInject pInject = pType.getAnnotation(NgInject
.class);
if (pInject != null) {
params.add(pInject.name());
}
}
}
}
String paramString = Joiner.on(",").join(params);
sw.println(paramString + ") {");
sw.indent();
sw.println("return function(scope, elem, attrs) {");
sw.indent();
sw.println("var directive = @" + dType.getQualifiedSourceName() + "::new()();");
if (initMethod != null) {
sw.println("directive." + initMethod.getJsniSignature() + "(" + paramString + ");");
}
sw.println("directive." + method.getJsniSignature() + "(scope, elem, attrs);");
sw.println("};");
sw.outdent();
sw.outdent();
sw.println("});");
}
}
}
i++;
}
}
sw.println("}-*/;");
sw.outdent();
sw.commit(logger);
return typeName;
}
private String generateModelType(TreeLogger logger, GeneratorContext context,
JClassType modelType) throws UnableToCompleteException {
String simpleName = modelType.getName() + MODELIMPL;
ClassSourceFileComposerFactory fac =
new ClassSourceFileComposerFactory(modelType.getPackage().getName(),
simpleName);
fac.setSuperclass(JsModelBase.class.getName() + "<" + modelType.getName() + ">");
fac.addImport(JsonObject.class.getName());
fac.addImport(ArrayOfString.class.getName());
fac.addImport(JsModelBase.class.getName());
fac.addImport(Util.class.getName());
fac.addImplementedInterface(modelType.getQualifiedSourceName());
PrintWriter pw = context.tryCreate(logger, modelType.getPackage().getName(),
simpleName);
SourceWriter sw = null;
String typeName = modelType.getQualifiedSourceName() + MODELIMPL;
if (pw != null) {
sw = fac.createSourceWriter(context, pw);
}
if (sw == null) {
return typeName;
}
generateBeanImpl(logger, context, modelType, simpleName, sw);
sw.commit(logger);
return typeName;
}
private String generateController(TreeLogger logger, GeneratorContext context, String typeName,
JClassType type) throws UnableToCompleteException {
ClassSourceFileComposerFactory fac =
new ClassSourceFileComposerFactory(type.getPackage().getName(),
type.getName() + IMPL);
fac.setSuperclass(typeName);
fac.addImport(JavaScriptObject.class.getName());
PrintWriter pw = context.tryCreate(logger, type.getPackage().getName(), type.getName() + IMPL);
SourceWriter sw = null;
if (pw != null) {
sw = fac.createSourceWriter(context, pw);
}
if (sw == null) {
return typeName + IMPL;
}
String controllerName = type.getSimpleSourceName();
NgInject ngInject = type.getAnnotation(NgInject.class);
if (ngInject != null) {
controllerName = ngInject.name();
}
/*
* Generates code that looks similar to this:
* var self=this;
* $wnd.TodoController = $entry(function ($scope, $element) {
* var wrapScope = @com.google.gwt.todomvc.BodyScopeAdapter::new(Lelemental/json/JsonObject;)($scope);
* [email protected]::setScope(Lcom/google/gwt/angular/client/Scope;)(wrapScope);
* [email protected]::onInit(Lcom/google/gwt/angular/client/TodoScope;Lcom/google/gwt/dom/client/Element;)(wrapScope, $element);
* $scope.doSomething = $entry(function() {
* return [email protected]::doSomething()();
* });
* });
* $wnd.TodoController.$inject = ['$scope', '$element'];
*/
JMethod onInitMethod = findInitMethod(type, logger);
JClassType scopeClass = findScopeClass(onInitMethod);
String scopeAdapter = null;
if (scopeClass != null) {
scopeAdapter = generateScope(logger, context, scopeClass);
}
// this override teaches the compiler that TodoScope has been instantiated so it is not pruned
sw.indent();
sw.println("protected void setScope(" + scopeAdapter + " jsoScope) { super.setScope" +
"(jsoScope); " +
"}");
sw.outdent();
sw.indent();
sw.println("protected native void register(JavaScriptObject module) /*-{");
sw.indent();
sw.println("var self = this;");
sw.print("var ctrlFunc = $entry(function(");
List params = declareControllerParams(onInitMethod.getParameters());
sw.print(Joiner.on(", ").join(params));
sw.println(") {");
sw.indent();
sw.println(
"self.@" + typeName + IMPL + "::setScope" +
"(*)($scope);");
sw.print("self." + onInitMethod.getJsniSignature() + "(");
String controllerParams = Joiner.on(", ").join(params);
sw.print(controllerParams);
sw.println(");");
for (JMethod action : publicActionMethods(type, onInitMethod)) {
String argString = declareArgs(action);
sw.println("$scope." + action.getName() + " = $entry(function("
+ argString + ") {");
sw.indent();
sw.print(isVoidMethod(action) ? "" : "return ");
sw.print("self." + action.getJsniSignature());
sw.println("(" + argString + ");");
sw.outdent();
sw.println("});");
}
for (JMethod action : watchMethods(type)) {
NgWatch watchParams = action.getAnnotation(NgWatch.class);
String argString = declareArgs(action);
sw.println("$scope.$watch('" + watchParams.value() + "', $entry(function("
+ argString + ") {");
sw.indent();
sw.print(isVoidMethod(action) ? "" : "return ");
sw.print("self." + action.getJsniSignature());
sw.println("(" + argString + ");");
sw.outdent();
sw.println("}), " + watchParams.objEq() + ");");
}
sw.outdent();
sw.println("});");
// assign controller injections
sw.println(
"ctrlFunc.$inject = [\"" + Joiner.on("\", " +
"\"").join(params) + "\"];");
sw.println("module.controller('" + controllerName + "', ctrlFunc);");
sw.outdent();
sw.println("}-*/;");
sw.commit(logger);
return typeName + IMPL;
}
private String declareArgs(JMethod action) {
StringBuilder args = new StringBuilder();
for (int i = 0; i < action.getParameters().length; i++) {
if (i > 0) {
args.append(", ");
}
args.append("arg").append(i);
}
return args.toString();
}
private boolean isVoidMethod(JMethod method) {
return method.getReturnType() == JPrimitiveType.VOID;
}
private boolean typeEquals(JType type1, JType type2) {
if (type1 == null || type2 == null) {
return type1 == type2;
}
return type1.getErasedType() == type2.getErasedType();
}
private Collection publicActionMethods(JClassType type, JMethod onInitMethod) {
Collection methods = new ArrayList();
Set methodNames = new HashSet();
while(!typeEquals(type, controllerType)) {
for (JMethod method : type.getMethods()) {
if (method == onInitMethod) {
continue;
}
if (method.isAnnotationPresent(NgWatch.class) ||
method.isAnnotationPresent(NgExclude.class)) {
continue;
}
String name = method.getName();
if (methodNames.contains(name)) {
continue;
}
if (method.isPublic() && !method.isAbstract() && !method.isStatic()) {
methods.add(method);
methodNames.add(name);
}
}
type = type.getSuperclass();
}
return methods;
}
private Collection watchMethods(JClassType type) {
Collection methods = new ArrayList();
for (JMethod method : type.getMethods()) {
if (method.getAnnotation(NgWatch.class) == null) {
continue;
}
methods.add(method);
}
return methods;
}
private boolean isSetter(JMethod method) {
String name = method.getName();
// traditional setFooField(type) JavaBean setter
if (name.startsWith("set") && Character.isUpperCase(name.charAt(3))) {
return method.getParameters().length == 1 &&
(method.getReturnType() == JPrimitiveType.VOID || method.getReturnType() == method
.getEnclosingType());
// non-traditional fluent-only EnclosingType fooField(type) setter
} else if (method.getReturnType() == method.getEnclosingType() &&
method.getParameters().length == 1) {
return true;
}
return false;
}
private boolean isGetter(JMethod method) {
String name = method.getName();
// traditional Type getFooField() JavaBean getter
if (name.startsWith("get") && Character.isUpperCase(name.charAt(3))) {
return method.getParameters().length == 0;
// non traditional Type foo() getter, needs to have paired setter to be detected correctly
} else if (method.getParameters().length == 0) {
// TODO: should enforce that a setter exists to disambiguate this style of getter
return true;
}
return false;
}
private JClassType findScopeClass(JMethod onInitMethod) {
for (JParameter param : onInitMethod.getParameters()) {
JClassType cType = param.getType().isClassOrInterface();
if (isScope(cType)) {
return cType;
}
}
return null;
}
private String generateScope(TreeLogger logger, GeneratorContext context,
JClassType scopeClass)
throws UnableToCompleteException {
String simpleName = scopeClass.getName() + SCOPEIMPL;
ClassSourceFileComposerFactory fac =
new ClassSourceFileComposerFactory(scopeClass.getPackage().getName(),
simpleName);
fac.setSuperclass(JsScopeBase.class.getName() + "<" + scopeClass.getName() + ">");
fac.addImport(JsonObject.class.getName());
fac.addImport(ArrayOfString.class.getName());
fac.addImport(JsScopeBase.class.getName());
fac.addImport(Util.class.getName());
fac.addImplementedInterface(scopeClass.getQualifiedSourceName());
PrintWriter pw = context.tryCreate(logger, scopeClass.getPackage().getName(),
simpleName);
SourceWriter sw = null;
String typeName = scopeClass.getQualifiedSourceName() + SCOPEIMPL;
if (pw != null) {
sw = fac.createSourceWriter(context, pw);
}
if (sw == null) {
return typeName;
}
generateBeanImpl(logger, context, scopeClass, simpleName, sw);
sw.commit(logger);
return typeName;
}
private void generateBeanImpl(TreeLogger logger, GeneratorContext context, JClassType scopeClass,
String simpleName, SourceWriter sw)
throws UnableToCompleteException {
// constructor
sw.println("protected " + simpleName + "() {}");
/*Set types = new HashSet();
Queue queue = new LinkedList();
queue.add(scopeClass);
while(!queue.isEmpty()) {
JClassType type = queue.poll();
types.add(type);
for (JClassType interfaceType : type.getImplementedInterfaces()) {
if (!types.contains(interfaceType) &&
!typeEquals(interfaceType, modelType) && !typeEquals(interfaceType, scopeType)) {
queue.add(interfaceType);
}
}
}
for (JClassType type : types) { }
*/
// getters and setters
for (JMethod method : scopeClass.getMethods()) {
if (isGetter(method)) {
JPrimitiveType pType = method.getReturnType().isPrimitive();
if (pType != null) {
if (pType != JPrimitiveType.BOOLEAN) {
sw.println("final public " + pType.getSimpleSourceName() + " " + method.getName() + "() {");
sw.indent();
sw.println("return (" + pType.getSimpleSourceName() + ") json().getNumber(" +
quotedFieldName(method) + ");");
sw.outdent();
sw.println("}");
} else if (pType == JPrimitiveType.BOOLEAN) {
sw.println("final public boolean " + method.getName() + "() {");
sw.indent();
sw.println("return json().getBoolean(" + quotedFieldName(method) + ");");
sw.outdent();
sw.println("}");
} else {
// shouldn't reach here (only void left)
throw new UnableToCompleteException();
}
} else {
JClassType cType = method.getReturnType().isClassOrInterface();
if (cType.isAssignableTo(stringType)) {
sw.println("final public String " + method.getName() + "() {");
sw.indent();
sw.println("return json().getString(" + quotedFieldName(method) + ");");
sw.outdent();
sw.println("}");
} else {
sw.println(
"final public " + method.getReturnType().getParameterizedQualifiedSourceName() +
" " + method.getName() + "() {");
sw.indent();
generateDependentType(logger, context, method.getReturnType().isClassOrInterface());
sw.println("return Util.reinterpret_cast(json().get(" + quotedFieldName(method) + "));");
sw.outdent();
sw.println("}");
// handle arrays
// handle nested models
}
}
} else if (isSetter(method)) {
JPrimitiveType pType = method.getParameters()[0].getType().isPrimitive();
if (pType != null) {
if (pType != JPrimitiveType.BOOLEAN) {
sw.println(
"final public " + fluentOrVoid(method) + " " + method.getName() + "(" + pType
.getSimpleSourceName() + " arg) {");
sw.indent();
sw.println("json().put(" + quotedFieldName(method) + ", arg);");
maybeFluentReturn(sw, method);
sw.outdent();
sw.println("}");
} else if (pType == JPrimitiveType.BOOLEAN) {
sw.println("final public " + fluentOrVoid(method) + " " + method.getName() + "" +
"(boolean arg) {");
sw.indent();
sw.println("json().put(" + quotedFieldName(method) + ", arg);");
maybeFluentReturn(sw, method);
sw.outdent();
sw.println("}");
} else {
// shouldn't reach here (only void left)
throw new UnableToCompleteException();
}
} else {
JClassType cType = method.getParameters()[0].getType().isClassOrInterface();
if (cType.isAssignableTo(stringType)) {
sw.println(
"final public " + fluentOrVoid(method) + " " + method.getName() + "(String arg) {");
sw.indent();
sw.println("json().put(" + quotedFieldName(method) + ", arg);");
maybeFluentReturn(sw, method);
sw.outdent();
sw.println("}");
} else {
String paramType =
method.getParameters()[0].getType().getParameterizedQualifiedSourceName();
sw.println("final public " + fluentOrVoid(method) + " " + method.getName() + "(" +
paramType + " arg) {");
sw.indent();
generateDependentType(logger, context, method.getReturnType().isClassOrInterface());
String arg = "Util.reinterpret_cast(arg)";
sw.println("json().put(" + quotedFieldName(method) + ", " + arg + ");");
maybeFluentReturn(sw, method);
sw.outdent();
sw.println("}");
// handle arrays
// handle nested models
}
}
}
}
}
private void generateDependentType(TreeLogger logger, GeneratorContext context,
JClassType classOrInterface) throws UnableToCompleteException {
if (classOrInterface != null) {
if (classOrInterface.isAssignableTo(scopeType)) {
generateScope(logger, context, classOrInterface);
} else if (classOrInterface.isAssignableTo(modelType)) {
generateModelType(logger, context, classOrInterface);
} else if (classOrInterface.isAssignableTo(arrayOfType) &&
classOrInterface.isParameterized() != null) {
generateDependentType(logger, context, classOrInterface.isParameterized().getTypeArgs()[0]);
}
}
}
private void maybeFluentReturn(SourceWriter sw, JMethod method) {
if (method.getReturnType() != JPrimitiveType.VOID) {
sw.println("return this;");
}
}
private String fluentOrVoid(JMethod method) {
return method.getReturnType() != JPrimitiveType.VOID ? method.getEnclosingType()
.getSimpleSourceName() : "void";
}
private String quotedFieldName(JMethod method) {
String name = method.getName().substring(isBeanStyle(method) ? 3 : 0);
return "\"" + Character.toLowerCase(name.charAt(0)) + name.substring(1) + "\"";
}
private boolean isBeanStyle(JMethod method) {
return method.getName().startsWith("get") || method.getName().startsWith("set");
}
private JMethod findInitMethod(JClassType type, TreeLogger logger)
throws UnableToCompleteException {
JMethod onInit = null;
for (JMethod method : type.getMethods()) {
if (method.getName().equals("onInit")) {
if (onInit == null) {
onInit = method;
} else {
logger.log(TreeLogger.Type.ERROR, type.getName() + " has two onInit methods.");
throw new UnableToCompleteException();
}
}
}
return onInit;
}
private List declareControllerParams(JParameter[] parameters) {
List params = new ArrayList();
for (JParameter param : parameters) {
JClassType type = param.getType().isClassOrInterface();
if (isScope(type)) {
params.add("$scope");
} else if (isElement(type)) {
params.add("$element");
} else {
NgInject ngInject = type.getAnnotation(NgInject.class);
if (ngInject != null) {
params.add(ngInject.name());
}
}
}
return params;
}
private boolean isElement(JClassType ctype) {
return ctype != null && (ctype.isAssignableTo(elementType)
|| ctype.isAssignableTo(gwtElementType));
}
private boolean isScope(JClassType ctype) {
return ctype != null && ctype.isAssignableTo(scopeType);
}
}
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