/*
* Copyright 2014 Google Inc.
*
* 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.google.gwt.dev.javac;
import com.google.gwt.dev.jjs.SourceInfo;
import com.google.gwt.dev.jjs.ast.JClassType;
import com.google.gwt.dev.jjs.ast.JDeclaredType;
import com.google.gwt.dev.jjs.ast.JField;
import com.google.gwt.dev.jjs.ast.JInterfaceType;
import com.google.gwt.dev.jjs.ast.JMethod;
import com.google.gwt.dev.js.ast.JsNameRef;
import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.lookup.AnnotationBinding;
/**
* Utility functions to interact with JDT classes for JsInterop.
*/
public final class JsInteropUtil {
public static final String JSEXPORT_CLASS = "com.google.gwt.core.client.js.JsExport";
public static final String JSNAMESPACE_CLASS = "com.google.gwt.core.client.js.JsNamespace";
public static final String JSNOEXPORT_CLASS = "com.google.gwt.core.client.js.JsNoExport";
public static final String JSPROPERTY_CLASS = "com.google.gwt.core.client.js.JsProperty";
public static final String JSTYPE_CLASS = "com.google.gwt.core.client.js.JsType";
public static final String JSTYPEPROTOTYPE_CLASS =
"com.google.gwt.core.client.js.impl.PrototypeOfJsType";
public static String maybeGetJsNamespace(TypeDeclaration x) {
if (x.annotations != null) {
AnnotationBinding jsNamespace = JdtUtil.getAnnotation(x.binding, JSNAMESPACE_CLASS);
if (jsNamespace != null) {
return JdtUtil.getAnnotationParameterString(jsNamespace, "value");
}
}
return null;
}
public static void maybeSetExportedField(FieldDeclaration x, JField field) {
if (x.annotations != null) {
AnnotationBinding jsExport = JdtUtil.getAnnotation(x.binding, JSEXPORT_CLASS);
if (jsExport != null) {
String value = JdtUtil.getAnnotationParameterString(jsExport, "value");
if (value == null) {
value = ""; // JDT bug? returns null sometimes instead of "" for default value
}
field.setExportName(value);
}
}
}
public static void maybeSetJsinteropMethodProperties(AbstractMethodDeclaration x,
JMethod method) {
if (x.annotations != null) {
AnnotationBinding jsExport = JdtUtil.getAnnotation(x.binding, JSEXPORT_CLASS);
AnnotationBinding jsProperty = JdtUtil.getAnnotation(x.binding, JSPROPERTY_CLASS);
if (jsExport != null) {
String value = JdtUtil.getAnnotationParameterString(jsExport, "value");
if (value == null) {
// JDT bug? returns null instead of "" sometimes for default
value = "";
}
method.setExportName(value);
}
if (jsProperty != null) {
method.setJsProperty(true);
}
if (JdtUtil.getAnnotation(x.binding, JSNOEXPORT_CLASS) != null) {
method.setNoExport(true);
}
}
}
public static JInterfaceType.JsInteropType maybeGetJsInteropType(TypeDeclaration x,
String jsPrototype, JInterfaceType.JsInteropType interopType) {
if (x.annotations != null) {
AnnotationBinding jsInterface = JdtUtil.getAnnotation(x.binding, JSTYPE_CLASS);
if (jsInterface != null) {
boolean isNative = JdtUtil.getAnnotationParameterBoolean(jsInterface, "isNative");
interopType = jsPrototype != null ?
(isNative ? JDeclaredType.JsInteropType.NATIVE_PROTOTYPE :
JDeclaredType.JsInteropType.JS_PROTOTYPE) : JDeclaredType.JsInteropType.NO_PROTOTYPE;
}
}
return interopType;
}
public static String maybeGetJsTypePrototype(TypeDeclaration x, String jsPrototype) {
if (x.annotations != null) {
AnnotationBinding jsType = JdtUtil.getAnnotation(x.binding, JSTYPE_CLASS);
if (jsType != null) {
jsPrototype = JdtUtil.getAnnotationParameterString(jsType, "prototype");
}
}
return jsPrototype;
}
public static void maybeSetJsPrototypeFlag(TypeDeclaration x, JClassType type) {
if (JdtUtil.getAnnotation(x.binding, JSTYPEPROTOTYPE_CLASS) != null) {
((JClassType) type).setJsPrototypeStub(true);
}
}
public static boolean isClassWideJsExport(TypeDeclaration x) {
if (x.annotations != null) {
AnnotationBinding jsExport = JdtUtil.getAnnotation(x.binding, JSEXPORT_CLASS);
if (jsExport != null) {
return true;
}
}
return false;
}
public static void maybeSetJsNamespace(JDeclaredType type, TypeDeclaration x) {
if (x.annotations != null) {
AnnotationBinding jsNamespace = JdtUtil.getAnnotation(x.binding, JSNAMESPACE_CLASS);
if (jsNamespace != null) {
type.setJsNamespace(JdtUtil.getAnnotationParameterString(jsNamespace, "value"));
} else {
if (type.getSuperClass() != null && x.enclosingType != null) {
maybeSetJsNamespace(type.getSuperClass(), x.enclosingType);
}
}
}
}
public static JsNameRef convertQualifiedPrototypeToNameRef(SourceInfo sourceInfo, String jsPrototype) {
String parts[] = jsPrototype.split("\\.");
JsNameRef toReturn = new JsNameRef(sourceInfo, parts[parts.length - 1]);
JsNameRef ref = toReturn;
for (int i = parts.length - 2; i >= 0; i--) {
JsNameRef qualifier = new JsNameRef(sourceInfo, parts[i]);
ref.setQualifier(qualifier);
ref = qualifier;
}
return toReturn;
}
}