jaroslav@432: /**
jaroslav@432:  * Back 2 Browser Bytecode Translator
jaroslav@432:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@432:  *
jaroslav@432:  * This program is free software: you can redistribute it and/or modify
jaroslav@432:  * it under the terms of the GNU General Public License as published by
jaroslav@432:  * the Free Software Foundation, version 2 of the License.
jaroslav@432:  *
jaroslav@432:  * This program is distributed in the hope that it will be useful,
jaroslav@432:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@432:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@432:  * GNU General Public License for more details.
jaroslav@432:  *
jaroslav@432:  * You should have received a copy of the GNU General Public License
jaroslav@432:  * along with this program. Look for COPYING file in the top folder.
jaroslav@432:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@432:  */
jaroslav@432: package org.apidesign.bck2brwsr.core.impl;
jaroslav@432: 
jaroslav@432: import java.util.Collections;
jaroslav@432: import java.util.HashSet;
jaroslav@432: import java.util.List;
jaroslav@432: import java.util.Set;
jaroslav@432: import javax.annotation.processing.AbstractProcessor;
jaroslav@432: import javax.annotation.processing.Completion;
jaroslav@432: import javax.annotation.processing.Completions;
jaroslav@757: import javax.annotation.processing.Messager;
jaroslav@432: import javax.annotation.processing.Processor;
jaroslav@432: import javax.annotation.processing.RoundEnvironment;
jaroslav@432: import javax.lang.model.element.AnnotationMirror;
jaroslav@432: import javax.lang.model.element.Element;
jaroslav@432: import javax.lang.model.element.ElementKind;
jaroslav@432: import javax.lang.model.element.ExecutableElement;
jaroslav@432: import javax.lang.model.element.TypeElement;
jaroslav@432: import javax.lang.model.element.VariableElement;
jaroslav@757: import javax.lang.model.type.TypeKind;
jaroslav@432: import javax.tools.Diagnostic;
jaroslav@432: import org.apidesign.bck2brwsr.core.JavaScriptBody;
jaroslav@432: import org.openide.util.lookup.ServiceProvider;
jaroslav@432: 
jaroslav@432: /**
jaroslav@432:  *
jaroslav@432:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@432:  */
jaroslav@432: @ServiceProvider(service = Processor.class)
jaroslav@432: public final class JavaScriptProcesor extends AbstractProcessor {
jaroslav@432:     @Override
jaroslav@432:     public Set<String> getSupportedAnnotationTypes() {
jaroslav@432:         Set<String> set = new HashSet<>();
jaroslav@432:         set.add(JavaScriptBody.class.getName());
jaroslav@432:         return set;
jaroslav@432:     }
jaroslav@432:     
jaroslav@432:     @Override
jaroslav@432:     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
jaroslav@757:         final Messager msg = processingEnv.getMessager();
jaroslav@432:         for (Element e : roundEnv.getElementsAnnotatedWith(JavaScriptBody.class)) {
jaroslav@443:             if (e.getKind() != ElementKind.METHOD && e.getKind() != ElementKind.CONSTRUCTOR) {
jaroslav@432:                 continue;
jaroslav@432:             }
jaroslav@432:             ExecutableElement ee = (ExecutableElement)e;
jaroslav@432:             List<? extends VariableElement> params = ee.getParameters();
jaroslav@432:             
jaroslav@432:             JavaScriptBody jsb = e.getAnnotation(JavaScriptBody.class);
jaroslav@575:             if (jsb == null) {
jaroslav@575:                 continue;
jaroslav@575:             }
jaroslav@432:             String[] arr = jsb.args();
jaroslav@443:             if (params.size() != arr.length) {
jaroslav@757:                 msg.printMessage(Diagnostic.Kind.ERROR, "Number of args arguments does not match real arguments!", e);
jaroslav@757:             }
jaroslav@757:             if (ee.getReturnType().getKind() == TypeKind.LONG) {
jaroslav@757:                 msg.printMessage(Diagnostic.Kind.WARNING, "Don't return long. Return double and convert it to long in Java code.", e);
jaroslav@432:             }
jaroslav@432:         }
jaroslav@432:         return true;
jaroslav@432:     }
jaroslav@432: 
jaroslav@432:     @Override
jaroslav@432:     public Iterable<? extends Completion> getCompletions(Element e, 
jaroslav@432:         AnnotationMirror annotation, ExecutableElement member, String userText
jaroslav@432:     ) {
jaroslav@432:         StringBuilder sb = new StringBuilder();
jaroslav@432:         if (e.getKind() == ElementKind.METHOD && member.getSimpleName().contentEquals("args")) {
jaroslav@432:             ExecutableElement ee = (ExecutableElement) e;
jaroslav@443:             String sep = "";
jaroslav@443:             sb.append("{ ");
jaroslav@432:             for (VariableElement ve : ee.getParameters()) {
jaroslav@432:                 sb.append(sep).append('"').append(ve.getSimpleName())
jaroslav@432:                     .append('"');
jaroslav@432:                 sep = ", ";
jaroslav@432:             }
jaroslav@432:             sb.append(" }");
jaroslav@432:             return Collections.nCopies(1, Completions.of(sb.toString()));
jaroslav@432:         }
jaroslav@432:         return null;
jaroslav@432:     }
jaroslav@432: 
jaroslav@432:     
jaroslav@432: }