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.ArrayList;
25 import java.util.Collections;
26 import java.util.List;
27 import java.util.Locale;
29 import javax.annotation.processing.AbstractProcessor;
30 import javax.annotation.processing.Completion;
31 import javax.annotation.processing.Completions;
32 import javax.annotation.processing.Processor;
33 import javax.annotation.processing.RoundEnvironment;
34 import javax.annotation.processing.SupportedAnnotationTypes;
35 import javax.lang.model.element.AnnotationMirror;
36 import javax.lang.model.element.Element;
37 import javax.lang.model.element.ElementKind;
38 import javax.lang.model.element.ExecutableElement;
39 import javax.lang.model.element.Modifier;
40 import javax.lang.model.element.PackageElement;
41 import javax.lang.model.element.TypeElement;
42 import javax.tools.Diagnostic;
43 import javax.tools.FileObject;
44 import javax.tools.StandardLocation;
45 import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
46 import org.apidesign.bck2brwsr.htmlpage.api.Page;
47 import org.openide.util.lookup.ServiceProvider;
49 /** Annotation processor to process an XHTML page and generate appropriate
52 * @author Jaroslav Tulach <jtulach@netbeans.org>
54 @ServiceProvider(service=Processor.class)
55 @SupportedAnnotationTypes({
56 "org.apidesign.bck2brwsr.htmlpage.api.Page",
57 "org.apidesign.bck2brwsr.htmlpage.api.OnClick"
59 public final class PageProcessor extends AbstractProcessor {
61 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
62 for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {
63 Page p = e.getAnnotation(Page.class);
64 PackageElement pe = (PackageElement)e.getEnclosingElement();
65 String pkg = pe.getQualifiedName().toString();
69 InputStream is = openStream(pkg, p.xhtml());
70 pp = ProcessPage.readPage(is);
72 } catch (IOException iOException) {
73 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't read " + p.xhtml(), e);
77 String className = p.className();
78 if (className.isEmpty()) {
79 int indx = p.xhtml().indexOf('.');
80 className = p.xhtml().substring(0, indx);
83 FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
84 w = new OutputStreamWriter(java.openOutputStream());
86 w.append("package " + pkg + ";\n");
87 w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
88 w.append("class ").append(className).append(" {\n");
89 for (String id : pp.ids()) {
90 String tag = pp.tagNameForId(id);
91 String type = type(tag);
92 w.append(" ").append("public static final ").
93 append(type).append(' ').append(cnstnt(id)).append(" = new ").
94 append(type).append("(\"").append(id).append("\");\n");
96 w.append(" static {\n");
97 if (!initializeOnClick(pe, w, pp)) {
105 } catch (IOException ex) {
106 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + className + ".java", e);
113 private InputStream openStream(String pkg, String name) throws IOException {
115 FileObject fo = processingEnv.getFiler().getResource(
116 StandardLocation.SOURCE_PATH, pkg, name);
117 return fo.openInputStream();
118 } catch (IOException ex) {
119 return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();
123 private static String type(String tag) {
124 if (tag.equals("title")) {
127 if (tag.equals("button")) {
130 if (tag.equals("input")) {
136 private static String cnstnt(String id) {
137 return id.toUpperCase(Locale.ENGLISH).replace('.', '_');
140 private boolean initializeOnClick(PackageElement pe, Writer w, ProcessPage pp) throws IOException {
141 for (Element clazz : pe.getEnclosedElements()) {
142 if (clazz.getKind() != ElementKind.CLASS) {
145 TypeElement type = (TypeElement)clazz;
146 for (Element method : clazz.getEnclosedElements()) {
147 OnClick oc = method.getAnnotation(OnClick.class);
149 if (pp.tagNameForId(oc.id()) == null) {
150 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "id = " + oc.id() + " does not exist in the HTML page. Found only " + pp.ids(), method);
153 ExecutableElement ee = (ExecutableElement)method;
154 if (!ee.getParameters().isEmpty()) {
155 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method can't take arguments", ee);
158 if (!ee.getModifiers().contains(Modifier.STATIC)) {
159 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method has to be static", ee);
162 if (ee.getModifiers().contains(Modifier.PRIVATE)) {
163 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClose method can't be private", ee);
166 w.append(" ").append(cnstnt(oc.id())).
167 append(".addOnClick(new Runnable() { public void run() {\n");
168 w.append(" ").append(type.getSimpleName().toString()).
169 append('.').append(ee.getSimpleName()).append("();\n");
178 public Iterable<? extends Completion> getCompletions(
179 Element element, AnnotationMirror annotation,
180 ExecutableElement member, String userText
182 if (!userText.startsWith("\"")) {
183 return Collections.emptyList();
186 Element cls = findClass(element);
187 Page p = cls.getAnnotation(Page.class);
188 PackageElement pe = (PackageElement) cls.getEnclosingElement();
189 String pkg = pe.getQualifiedName().toString();
192 InputStream is = openStream(pkg, p.xhtml());
193 pp = ProcessPage.readPage(is);
195 } catch (IOException iOException) {
196 return Collections.emptyList();
199 List<Completion> cc = new ArrayList<Completion>();
200 userText = userText.substring(1);
201 for (String id : pp.ids()) {
202 if (id.startsWith(userText)) {
203 cc.add(Completions.of("\"" + id + "\"", id));
209 private static Element findClass(Element e) {
213 Page p = e.getAnnotation(Page.class);
217 return e.getEnclosingElement();