2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.htmlpage;
20 import java.io.IOException;
21 import java.io.InputStream;
22 import java.io.OutputStreamWriter;
23 import java.io.Writer;
24 import java.util.Locale;
26 import javax.annotation.processing.AbstractProcessor;
27 import javax.annotation.processing.Processor;
28 import javax.annotation.processing.RoundEnvironment;
29 import javax.annotation.processing.SupportedAnnotationTypes;
30 import javax.lang.model.element.Element;
31 import javax.lang.model.element.ElementKind;
32 import javax.lang.model.element.ExecutableElement;
33 import javax.lang.model.element.Modifier;
34 import javax.lang.model.element.PackageElement;
35 import javax.lang.model.element.TypeElement;
36 import javax.tools.Diagnostic;
37 import javax.tools.FileObject;
38 import javax.tools.StandardLocation;
39 import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
40 import org.apidesign.bck2brwsr.htmlpage.api.Page;
41 import org.openide.util.lookup.ServiceProvider;
43 /** Annotation processor to process an XHTML page and generate appropriate
46 * @author Jaroslav Tulach <jtulach@netbeans.org>
48 @ServiceProvider(service=Processor.class)
49 @SupportedAnnotationTypes({
50 "org.apidesign.bck2brwsr.htmlpage.api.Page",
51 "org.apidesign.bck2brwsr.htmlpage.api.OnClick"
53 public final class PageProcessor extends AbstractProcessor {
55 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
56 for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {
57 Page p = e.getAnnotation(Page.class);
58 PackageElement pe = (PackageElement)e.getEnclosingElement();
59 String pkg = pe.getQualifiedName().toString();
63 InputStream is = openStream(pkg, p.xhtml());
64 pp = ProcessPage.readPage(is);
66 } catch (IOException iOException) {
67 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't read " + p.xhtml(), e);
72 FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + p.name(), e);
73 w = new OutputStreamWriter(java.openOutputStream());
75 w.append("package " + pkg + ";\n");
76 w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
77 w.append("class ").append(p.name()).append(" {\n");
78 for (String id : pp.ids()) {
79 String tag = pp.tagNameForId(id);
80 String type = type(tag);
81 w.append(" ").append("public static final ").
82 append(type).append(' ').append(cnstnt(id)).append(" = new ").
83 append(type).append("(\"").append(id).append("\");\n");
85 w.append(" static {\n");
86 if (!initializeOnClick(pe, w, pp)) {
94 } catch (IOException ex) {
95 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + p.name() + ".java", e);
102 private InputStream openStream(String pkg, String name) throws IOException {
103 FileObject fo = processingEnv.getFiler().getResource(
104 StandardLocation.SOURCE_PATH, pkg, name);
106 return fo.openInputStream();
107 } catch (IOException ex) {
108 return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();
112 private static String type(String tag) {
113 if (tag.equals("title")) {
116 if (tag.equals("button")) {
119 if (tag.equals("input")) {
125 private static String cnstnt(String id) {
126 return id.toUpperCase(Locale.ENGLISH).replace('.', '_');
129 private boolean initializeOnClick(PackageElement pe, Writer w, ProcessPage pp) throws IOException {
130 for (Element clazz : pe.getEnclosedElements()) {
131 if (clazz.getKind() != ElementKind.CLASS) {
134 TypeElement type = (TypeElement)clazz;
135 for (Element method : clazz.getEnclosedElements()) {
136 OnClick oc = method.getAnnotation(OnClick.class);
138 if (pp.tagNameForId(oc.id()) == null) {
139 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "id = " + oc.id() + " does not exist in the HTML page. Found only " + pp.ids(), method);
142 ExecutableElement ee = (ExecutableElement)method;
143 if (!ee.getParameters().isEmpty()) {
144 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method can't take arguments", ee);
147 if (!ee.getModifiers().contains(Modifier.STATIC)) {
148 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method has to be static", ee);
151 if (ee.getModifiers().contains(Modifier.PRIVATE)) {
152 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method can't be private", ee);
155 w.append(" ").append(cnstnt(oc.id())).
156 append(".addOnClick(new Runnable() { public void run() {\n");
157 w.append(" ").append(type.getSimpleName().toString()).
158 append('.').append(ee.getSimpleName()).append("();\n");