hg/bck2brwsr: javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/PageProcessor.java@607f062485cc

     1 /**

     2  * Back 2 Browser Bytecode Translator

     3  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

     4  *

     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.

     8  *

     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.

    13  *

    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.

    17  */

    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.Collection;

    26 import java.util.Collections;

    27 import java.util.HashMap;

    28 import java.util.LinkedHashSet;

    29 import java.util.List;

    30 import java.util.Locale;

    31 import java.util.Map;

    32 import java.util.Set;

    33 import javax.annotation.processing.AbstractProcessor;

    34 import javax.annotation.processing.Completion;

    35 import javax.annotation.processing.Completions;

    36 import javax.annotation.processing.Processor;

    37 import javax.annotation.processing.RoundEnvironment;

    38 import javax.annotation.processing.SupportedAnnotationTypes;

    39 import javax.lang.model.element.AnnotationMirror;

    40 import javax.lang.model.element.Element;

    41 import javax.lang.model.element.ElementKind;

    42 import javax.lang.model.element.ExecutableElement;

    43 import javax.lang.model.element.Modifier;

    44 import javax.lang.model.element.PackageElement;

    45 import javax.lang.model.element.TypeElement;

    46 import javax.lang.model.element.VariableElement;

    47 import javax.lang.model.type.MirroredTypeException;

    48 import javax.lang.model.type.TypeMirror;

    49 import javax.tools.Diagnostic;

    50 import javax.tools.FileObject;

    51 import javax.tools.StandardLocation;

    52 import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;

    53 import org.apidesign.bck2brwsr.htmlpage.api.On;

    54 import org.apidesign.bck2brwsr.htmlpage.api.Page;

    55 import org.apidesign.bck2brwsr.htmlpage.api.Property;

    56 import org.openide.util.lookup.ServiceProvider;

    58 /** Annotation processor to process an XHTML page and generate appropriate

    59  * "id" file.

    60  *

    61  * @author Jaroslav Tulach <jtulach@netbeans.org>

    62  */

    63 @ServiceProvider(service=Processor.class)

    64 @SupportedAnnotationTypes({

    65     "org.apidesign.bck2brwsr.htmlpage.api.Page",

    66     "org.apidesign.bck2brwsr.htmlpage.api.On"

    67 })

    68 public final class PageProcessor extends AbstractProcessor {

    69     @Override

    70     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

    71         for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {

    72             Page p = e.getAnnotation(Page.class);

    73             PackageElement pe = (PackageElement)e.getEnclosingElement();

    74             String pkg = pe.getQualifiedName().toString();

    76             ProcessPage pp;

    77             try {

    78                 InputStream is = openStream(pkg, p.xhtml());

    79                 pp = ProcessPage.readPage(is);

    80                 is.close();

    81             } catch (IOException iOException) {

    82                 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't read " + p.xhtml(), e);

    83                 return false;

    84             }

    85             Writer w;

    86             String className = p.className();

    87             if (className.isEmpty()) {

    88                 int indx = p.xhtml().indexOf('.');

    89                 className = p.xhtml().substring(0, indx);

    90             }

    91             try {

    92                 FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);

    93                 w = new OutputStreamWriter(java.openOutputStream());

    94                 try {

    95                     w.append("package " + pkg + ";\n");

    96                     w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");

    97                     w.append("class ").append(className).append(" {\n");

    98                     w.append("  private ").append(className).append("() {}\n");

    99                     for (String id : pp.ids()) {

   100                         String tag = pp.tagNameForId(id);

   101                         String type = type(tag);

   102                         w.append("  ").append("public static final ").

   103                             append(type).append(' ').append(cnstnt(id)).append(" = new ").

   104                             append(type).append("(\"").append(id).append("\");\n");

   105                     }

   106                     w.append("  static {\n");

   107                     if (!initializeOnClick((TypeElement) e, w, pp)) {

   108                         return false;

   109                     }

   110                     w.append("  }\n");

   111                     List<String> propsGetSet = new ArrayList<String>();

   112                     Map<String,Collection<String>> propsDeps = new HashMap<String, Collection<String>>();

   113                     generateComputedProperties(w, e.getEnclosedElements(), propsGetSet, propsDeps);

   114                     generateProperties(w, p.properties(), propsGetSet, propsDeps);

   115                     w.append("  private static org.apidesign.bck2brwsr.htmlpage.Knockout ko;\n");

   116                     if (!propsGetSet.isEmpty()) {

   117                         w.write("public static void applyBindings() {\n");

   118                         w.write("  ko = org.apidesign.bck2brwsr.htmlpage.Knockout.applyBindings(");

   119                         w.write(className + ".class, new " + className + "(), ");

   120                         w.write("new String[] {\n");

   121                         String sep = "";

   122                         for (String n : propsGetSet) {

   123                             w.write(sep);

   124                             if (n == null) {

   125                                 w.write("    null");

   126                             } else {

   127                                 w.write("    \"" + n + "\"");

   128                             }

   129                             sep = ",\n";

   130                         }

   131                         w.write("\n  });\n}\n");

   132                         //w.write("static { applyBindings(); }\n");

   133                     }

   134                     w.append("}\n");

   135                 } finally {

   136                     w.close();

   137                 }

   138             } catch (IOException ex) {

   139                 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + className + ".java", e);

   140                 return false;

   141             }

   142         }

   143         return true;

   144     }

   146     private InputStream openStream(String pkg, String name) throws IOException {

   147         try {

   148             FileObject fo = processingEnv.getFiler().getResource(

   149                 StandardLocation.SOURCE_PATH, pkg, name);

   150             return fo.openInputStream();

   151         } catch (IOException ex) {

   152             return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();

   153         }

   154     }

   156     private static String type(String tag) {

   157         if (tag.equals("title")) {

   158             return "Title";

   159         }

   160         if (tag.equals("button")) {

   161             return "Button";

   162         }

   163         if (tag.equals("input")) {

   164             return "Input";

   165         }

   166         return "Element";

   167     }

   169     private static String cnstnt(String id) {

   170         return id.toUpperCase(Locale.ENGLISH).replace('.', '_');

   171     }

   173     private boolean initializeOnClick(TypeElement type, Writer w, ProcessPage pp) throws IOException {

   174         TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();

   175         { //for (Element clazz : pe.getEnclosedElements()) {

   176           //  if (clazz.getKind() != ElementKind.CLASS) {

   177             //    continue;

   178            // }

   179             for (Element method : type.getEnclosedElements()) {

   180                 On oc = method.getAnnotation(On.class);

   181                 if (oc != null) {

   182                     for (String id : oc.id()) {

   183                         if (pp.tagNameForId(id) == null) {

   184                             processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "id = " + id + " does not exist in the HTML page. Found only " + pp.ids(), method);

   185                             return false;

   186                         }

   187                         ExecutableElement ee = (ExecutableElement)method;

   188                         boolean hasParam;

   189                         if (ee.getParameters().isEmpty()) {

   190                             hasParam = false;

   191                         } else {

   192                             if (ee.getParameters().size() != 1 || ee.getParameters().get(0).asType() != stringType) {

   193                                 processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method should either have no arguments or one String argument", ee);

   194                                 return false;

   195                             }

   196                             hasParam = true;

   197                         }

   198                         if (!ee.getModifiers().contains(Modifier.STATIC)) {

   199                             processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method has to be static", ee);

   200                             return false;

   201                         }

   202                         if (ee.getModifiers().contains(Modifier.PRIVATE)) {

   203                             processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@On method can't be private", ee);

   204                             return false;

   205                         }

   206                         w.append("  OnEvent." + oc.event()).append(".of(").append(cnstnt(id)).

   207                             append(").perform(new Runnable() { public void run() {\n");

   208                         w.append("    ").append(type.getSimpleName().toString()).

   209                             append('.').append(ee.getSimpleName()).append("(");

   210                         if (hasParam) {

   211                             w.append("\"").append(id).append("\"");

   212                         }

   213                         w.append(");\n");

   214                         w.append("  }});\n");

   215                     }

   216                 }

   217             }

   218         }

   219         return true;

   220     }

   222     @Override

   223     public Iterable<? extends Completion> getCompletions(

   224         Element element, AnnotationMirror annotation,

   225         ExecutableElement member, String userText

   226     ) {

   227         if (!userText.startsWith("\"")) {

   228             return Collections.emptyList();

   229         }

   231         Element cls = findClass(element);

   232         Page p = cls.getAnnotation(Page.class);

   233         PackageElement pe = (PackageElement) cls.getEnclosingElement();

   234         String pkg = pe.getQualifiedName().toString();

   235         ProcessPage pp;

   236         try {

   237             InputStream is = openStream(pkg, p.xhtml());

   238             pp = ProcessPage.readPage(is);

   239             is.close();

   240         } catch (IOException iOException) {

   241             return Collections.emptyList();

   242         }

   244         List<Completion> cc = new ArrayList<Completion>();

   245         userText = userText.substring(1);

   246         for (String id : pp.ids()) {

   247             if (id.startsWith(userText)) {

   248                 cc.add(Completions.of("\"" + id + "\"", id));

   249             }

   250         }

   251         return cc;

   252     }

   254     private static Element findClass(Element e) {

   255         if (e == null) {

   256             return null;

   257         }

   258         Page p = e.getAnnotation(Page.class);

   259         if (p != null) {

   260             return e;

   261         }

   262         return e.getEnclosingElement();

   263     }

   265     private static void generateProperties(

   266         Writer w, Property[] properties, Collection<String> props,

   267         Map<String,Collection<String>> deps

   268     ) throws IOException {

   269         for (Property p : properties) {

   270             final String tn = typeName(p);

   271             String[] gs = toGetSet(p.name(), tn);

   273             w.write("private static " + tn + " prop_" + p.name() + ";\n");

   274             w.write("public static " + tn + " " + gs[0] + "() {\n");

   275             w.write("  return prop_" + p.name() + ";\n");

   276             w.write("}\n");

   277             w.write("public static void " + gs[1] + "(" + tn + " v) {\n");

   278             w.write("  prop_" + p.name() + " = v;\n");

   279             w.write("  if (ko != null) {\n");

   280             w.write("    ko.valueHasMutated(\"" + p.name() + "\");\n");

   281             final Collection<String> dependants = deps.get(p.name());

   282             if (dependants != null) {

   283                 for (String depProp : dependants) {

   284                     w.write("    ko.valueHasMutated(\"" + depProp + "\");\n");

   285                 }

   286             }

   287             w.write("  }\n");

   288             w.write("}\n");

   290             props.add(p.name());

   291             props.add(gs[2]);

   292             props.add(gs[3]);

   293         }

   294     }

   296     private boolean generateComputedProperties(

   297         Writer w, Collection<? extends Element> arr, Collection<String> props,

   298         Map<String,Collection<String>> deps

   299     ) throws IOException {

   300         for (Element e : arr) {

   301             if (e.getKind() != ElementKind.METHOD) {

   302                 continue;

   303             }

   304             if (e.getAnnotation(ComputedProperty.class) == null) {

   305                 continue;

   306             }

   307             ExecutableElement ee = (ExecutableElement)e;

   308             final String tn = ee.getReturnType().toString();

   309             final String sn = ee.getSimpleName().toString();

   310             String[] gs = toGetSet(sn, tn);

   312             w.write("public static " + tn + " " + gs[0] + "() {\n");

   313             w.write("  return " + e.getEnclosingElement().getSimpleName() + '.' + e.getSimpleName() + "(");

   314             String sep = "";

   315             for (VariableElement pe : ee.getParameters()) {

   316                 final String dn = pe.getSimpleName().toString();

   317                 String[] call = toGetSet(dn, pe.asType().toString());

   318                 w.write(sep);

   319                 w.write(call[0] + "()");

   320                 sep = ", ";

   322                 Collection<String> depends = deps.get(dn);

   323                 if (depends == null) {

   324                     depends = new LinkedHashSet<String>();

   325                     deps.put(dn, depends);

   326                 }

   327                 depends.add(sn);

   328             }

   329             w.write(");\n");

   330             w.write("}\n");

   332             props.add(e.getSimpleName().toString());

   333             props.add(gs[2]);

   334             props.add(null);

   335         }

   337         return true;

   338     }

   340     private static String[] toGetSet(String name, String type) {

   341         String n = Character.toUpperCase(name.charAt(0)) + name.substring(1);

   342         String bck2brwsrType = "L" + type.replace('.', '_') + "_2";

   343         if ("int".equals(type)) {

   344             bck2brwsrType = "I";

   345         }

   346         if ("double".equals(type)) {

   347             bck2brwsrType = "D";

   348         }

   349         String pref = "get";

   350         if ("boolean".equals(type)) {

   351             pref = "is";

   352             bck2brwsrType = "Z";

   353         }

   354         final String nu = n.replace('.', '_');

   355         return new String[]{

   356             pref + n,

   357             "set" + n,

   358             pref + nu + "__" + bck2brwsrType,

   359             "set" + nu + "__V" + bck2brwsrType

   360         };

   361     }

   363     private static String typeName(Property p) {

   364         try {

   365             return p.type().getName();

   366         } catch (MirroredTypeException ex) {

   367             return ex.getTypeMirror().toString();

   368         }

   369     }

   370 }

author	Jaroslav Tulach <jaroslav.tulach@apidesign.org>
	Mon, 21 Jan 2013 07:00:56 +0100
branch	model
changeset 498	607f062485cc
parent 496	a06c98795b01
child 500	f9e80d48e9b4
permissions	-rw-r--r--