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.ExecutableElement;
38 import javax.lang.model.element.Modifier;
39 import javax.lang.model.element.PackageElement;
40 import javax.lang.model.element.TypeElement;
41 import javax.lang.model.type.MirroredTypeException;
42 import javax.lang.model.type.TypeMirror;
43 import javax.tools.Diagnostic;
44 import javax.tools.FileObject;
45 import javax.tools.StandardLocation;
46 import org.apidesign.bck2brwsr.htmlpage.api.On;
47 import org.apidesign.bck2brwsr.htmlpage.api.Page;
48 import org.apidesign.bck2brwsr.htmlpage.api.Property;
49 import org.openide.util.lookup.ServiceProvider;
51 /** Annotation processor to process an XHTML page and generate appropriate
54 * @author Jaroslav Tulach <jtulach@netbeans.org>
56 @ServiceProvider(service=Processor.class)
57 @SupportedAnnotationTypes({
58 "org.apidesign.bck2brwsr.htmlpage.api.Page",
59 "org.apidesign.bck2brwsr.htmlpage.api.On"
61 public final class PageProcessor extends AbstractProcessor {
63 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
64 for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {
65 Page p = e.getAnnotation(Page.class);
66 PackageElement pe = (PackageElement)e.getEnclosingElement();
67 String pkg = pe.getQualifiedName().toString();
71 InputStream is = openStream(pkg, p.xhtml());
72 pp = ProcessPage.readPage(is);
74 } catch (IOException iOException) {
75 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't read " + p.xhtml(), e);
79 String className = p.className();
80 if (className.isEmpty()) {
81 int indx = p.xhtml().indexOf('.');
82 className = p.xhtml().substring(0, indx);
85 FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
86 w = new OutputStreamWriter(java.openOutputStream());
88 w.append("package " + pkg + ";\n");
89 w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
90 w.append("class ").append(className).append(" {\n");
91 for (String id : pp.ids()) {
92 String tag = pp.tagNameForId(id);
93 String type = type(tag);
94 w.append(" ").append("public static final ").
95 append(type).append(' ').append(cnstnt(id)).append(" = new ").
96 append(type).append("(\"").append(id).append("\");\n");
98 w.append(" static {\n");
99 if (!initializeOnClick((TypeElement) e, w, pp)) {
103 generateProperties(w, p.properties());
108 } catch (IOException ex) {
109 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + className + ".java", e);
116 private InputStream openStream(String pkg, String name) throws IOException {
118 FileObject fo = processingEnv.getFiler().getResource(
119 StandardLocation.SOURCE_PATH, pkg, name);
120 return fo.openInputStream();
121 } catch (IOException ex) {
122 return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();
126 private static String type(String tag) {
127 if (tag.equals("title")) {
130 if (tag.equals("button")) {
133 if (tag.equals("input")) {
139 private static String cnstnt(String id) {
140 return id.toUpperCase(Locale.ENGLISH).replace('.', '_');
143 private boolean initializeOnClick(TypeElement type, Writer w, ProcessPage pp) throws IOException {
144 TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();
145 { //for (Element clazz : pe.getEnclosedElements()) {
146 // if (clazz.getKind() != ElementKind.CLASS) {
149 for (Element method : type.getEnclosedElements()) {
150 On oc = method.getAnnotation(On.class);
152 for (String id : oc.id()) {
153 if (pp.tagNameForId(id) == null) {
154 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "id = " + id + " does not exist in the HTML page. Found only " + pp.ids(), method);
157 ExecutableElement ee = (ExecutableElement)method;
159 if (ee.getParameters().isEmpty()) {
162 if (ee.getParameters().size() != 1 || ee.getParameters().get(0).asType() != stringType) {
163 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method should either have no arguments or one String argument", ee);
168 if (!ee.getModifiers().contains(Modifier.STATIC)) {
169 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method has to be static", ee);
172 if (ee.getModifiers().contains(Modifier.PRIVATE)) {
173 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method can't be private", ee);
176 w.append(" OnEvent." + oc.event()).append(".of(").append(cnstnt(id)).
177 append(").perform(new Runnable() { public void run() {\n");
178 w.append(" ").append(type.getSimpleName().toString()).
179 append('.').append(ee.getSimpleName()).append("(");
181 w.append("\"").append(id).append("\"");
193 public Iterable<? extends Completion> getCompletions(
194 Element element, AnnotationMirror annotation,
195 ExecutableElement member, String userText
197 if (!userText.startsWith("\"")) {
198 return Collections.emptyList();
201 Element cls = findClass(element);
202 Page p = cls.getAnnotation(Page.class);
203 PackageElement pe = (PackageElement) cls.getEnclosingElement();
204 String pkg = pe.getQualifiedName().toString();
207 InputStream is = openStream(pkg, p.xhtml());
208 pp = ProcessPage.readPage(is);
210 } catch (IOException iOException) {
211 return Collections.emptyList();
214 List<Completion> cc = new ArrayList<Completion>();
215 userText = userText.substring(1);
216 for (String id : pp.ids()) {
217 if (id.startsWith(userText)) {
218 cc.add(Completions.of("\"" + id + "\"", id));
224 private static Element findClass(Element e) {
228 Page p = e.getAnnotation(Page.class);
232 return e.getEnclosingElement();
235 private static void generateProperties(Writer w, Property[] properties) throws IOException {
236 for (Property p : properties) {
237 String[] gs = toGetSet(p);
239 final String tn = typeName(p);
240 w.write("private static " + tn + " prop_" + p.name() + ";\n");
241 w.write("public static " + tn + " " + gs[0] + "() {\n");
242 w.write(" return prop_" + p.name() + ";\n");
244 w.write("public static void " + gs[1] + "(" + tn + " v) {\n");
245 w.write(" prop_" + p.name() + " = v;\n");
250 private static String[] toGetSet(Property p) {
251 String n = Character.toUpperCase(p.name().charAt(0)) + p.name().substring(1);
252 // if (p.type() == boolean.class) {
253 // return new String[] { "is" + n, "set" + n };
255 return new String[]{"get" + n, "set" + n};
259 private static String typeName(Property p) {
261 return p.type().getName();
262 } catch (MirroredTypeException ex) {
263 if (ex.getTypeMirror().getKind().isPrimitive()) {
264 return ex.getTypeMirror().toString();