org.apidesign.bck2brwsr.htmlpage.PageProcessor Maven / Gradle / Ivy
/**
* Back 2 Browser Bytecode Translator
* Copyright (C) 2012-2018 Jaroslav Tulach
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. Look for COPYING file in the top folder.
* If not, see http://opensource.org/licenses/GPL-2.0.
*/
package org.apidesign.bck2brwsr.htmlpage;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.annotation.AnnotationTypeMismatchException;
import java.lang.annotation.IncompleteAnnotationException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Completion;
import javax.annotation.processing.Completions;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.ArrayType;
import javax.lang.model.type.MirroredTypeException;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
import org.apidesign.bck2brwsr.core.ExtraJavaScript;
import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;
import org.apidesign.bck2brwsr.htmlpage.api.Model;
import org.apidesign.bck2brwsr.htmlpage.api.On;
import org.apidesign.bck2brwsr.htmlpage.api.OnFunction;
import org.apidesign.bck2brwsr.htmlpage.api.OnPropertyChange;
import org.apidesign.bck2brwsr.htmlpage.api.OnReceive;
import org.apidesign.bck2brwsr.htmlpage.api.Page;
import org.apidesign.bck2brwsr.htmlpage.api.Property;
import org.openide.util.lookup.ServiceProvider;
/** Annotation processor to process an XHTML page and generate appropriate
* "id" file.
*
* @author Jaroslav Tulach
*/
@ExtraJavaScript(processByteCode = false, resource = "")
@ServiceProvider(service=Processor.class)
@SupportedAnnotationTypes({
"org.apidesign.bck2brwsr.htmlpage.api.Model",
"org.apidesign.bck2brwsr.htmlpage.api.Page",
"org.apidesign.bck2brwsr.htmlpage.api.OnFunction",
"org.apidesign.bck2brwsr.htmlpage.api.OnReceive",
"org.apidesign.bck2brwsr.htmlpage.api.OnPropertyChange",
"org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty",
"org.apidesign.bck2brwsr.htmlpage.api.On"
})
public final class PageProcessor extends AbstractProcessor {
private final Map models = new WeakHashMap<>();
private final Map verify = new WeakHashMap<>();
@Override
public boolean process(Set annotations, RoundEnvironment roundEnv) {
boolean ok = true;
for (Element e : roundEnv.getElementsAnnotatedWith(Model.class)) {
if (!processModel(e)) {
ok = false;
}
}
for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {
if (!processPage(e)) {
ok = false;
}
}
if (roundEnv.processingOver()) {
models.clear();
for (Map.Entry entry : verify.entrySet()) {
TypeElement te = (TypeElement)entry.getKey();
String fqn = processingEnv.getElementUtils().getBinaryName(te).toString();
Element finalElem = processingEnv.getElementUtils().getTypeElement(fqn);
if (finalElem == null) {
continue;
}
Prprt[] props;
Model m = finalElem.getAnnotation(Model.class);
if (m != null) {
props = Prprt.wrap(processingEnv, finalElem, m.properties());
} else {
Page p = finalElem.getAnnotation(Page.class);
props = Prprt.wrap(processingEnv, finalElem, p.properties());
}
for (Prprt p : props) {
boolean[] isModel = { false };
boolean[] isEnum = { false };
boolean[] isPrimitive = { false };
String t = checkType(p, isModel, isEnum, isPrimitive);
if (isEnum[0]) {
continue;
}
if (isPrimitive[0]) {
continue;
}
if (isModel[0]) {
continue;
}
if ("java.lang.String".equals(t)) {
continue;
}
error("The type " + t + " should be defined by @Model annotation", entry.getKey());
}
}
verify.clear();
}
return ok;
}
private InputStream openStream(String pkg, String name) throws IOException {
try {
FileObject fo = processingEnv.getFiler().getResource(
StandardLocation.SOURCE_PATH, pkg, name);
return fo.openInputStream();
} catch (IOException ex) {
return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();
}
}
private void error(String msg, Element e) {
processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, msg, e);
}
private boolean processModel(Element e) {
boolean ok = true;
Model m = e.getAnnotation(Model.class);
if (m == null) {
return true;
}
String pkg = findPkgName(e);
Writer w;
String className = m.className();
models.put(e, className);
try {
StringWriter body = new StringWriter();
List propsGetSet = new ArrayList<>();
List functions = new ArrayList<>();
Map> propsDeps = new HashMap<>();
Map> functionDeps = new HashMap<>();
Prprt[] props = createProps(e, m.properties());
if (!generateComputedProperties(body, props, e.getEnclosedElements(), propsGetSet, propsDeps)) {
ok = false;
}
if (!generateOnChange(e, propsDeps, props, className, functionDeps)) {
ok = false;
}
if (!generateProperties(e, body, props, propsGetSet, propsDeps, functionDeps)) {
ok = false;
}
if (!generateFunctions(e, body, className, e.getEnclosedElements(), functions)) {
ok = false;
}
FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
w = new OutputStreamWriter(java.openOutputStream());
try {
w.append("package " + pkg + ";\n");
w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
w.append("import org.apidesign.bck2brwsr.htmlpage.KOList;\n");
w.append("import org.apidesign.bck2brwsr.core.Exported;\n");
w.append("import org.apidesign.bck2brwsr.core.JavaScriptOnly;\n");
w.append("final class ").append(className).append(" implements Cloneable {\n");
w.append(" private boolean locked;\n");
w.append(" private org.apidesign.bck2brwsr.htmlpage.Knockout ko;\n");
w.append(body.toString());
w.append(" private static Class<" + inPckName(e) + "> modelFor() { return null; }\n");
w.append(" public ").append(className).append("() {\n");
w.append(" intKnckt();\n");
w.append(" };\n");
w.append(" private void intKnckt() {\n");
w.append(" ko = org.apidesign.bck2brwsr.htmlpage.Knockout.applyBindings(this, ");
writeStringArray(propsGetSet, w);
w.append(", ");
writeStringArray(functions, w);
w.append(" );\n");
w.append(" };\n");
w.append(" ").append(className).append("(Object json) {\n");
int values = 0;
for (int i = 0; i < propsGetSet.size(); i += 4) {
Prprt p = findPrprt(props, propsGetSet.get(i));
if (p == null) {
continue;
}
values++;
}
w.append(" Object[] ret = new Object[" + values + "];\n");
w.append(" org.apidesign.bck2brwsr.htmlpage.ConvertTypes.extractJSON(json, new String[] {\n");
for (int i = 0; i < propsGetSet.size(); i += 4) {
Prprt p = findPrprt(props, propsGetSet.get(i));
if (p == null) {
continue;
}
w.append(" \"").append(propsGetSet.get(i)).append("\",\n");
}
w.append(" }, ret);\n");
for (int i = 0, cnt = 0, prop = 0; i < propsGetSet.size(); i += 4) {
final String pn = propsGetSet.get(i);
Prprt p = findPrprt(props, pn);
if (p == null) {
continue;
}
boolean[] isModel = { false };
boolean[] isEnum = { false };
boolean isPrimitive[] = { false };
String type = checkType(props[prop++], isModel, isEnum, isPrimitive);
if (p.array()) {
w.append("if (ret[" + cnt + "] instanceof Object[]) {\n");
w.append(" for (Object e : ((Object[])ret[" + cnt + "])) {\n");
if (isModel[0]) {
w.append(" this.prop_").append(pn).append(".add(new ");
w.append(type).append("(e));\n");
} else if (isEnum[0]) {
w.append(" this.prop_").append(pn);
w.append(".add(e == null ? null : ");
w.append(type).append(".valueOf((String)e));\n");
} else {
if (isPrimitive(type)) {
w.append(" this.prop_").append(pn).append(".add(((Number)e).");
w.append(type).append("Value());\n");
} else {
w.append(" this.prop_").append(pn).append(".add((");
w.append(type).append(")e);\n");
}
}
w.append(" }\n");
w.append("}\n");
} else {
if (isEnum[0]) {
w.append(" this.prop_").append(pn);
w.append(" = ret[" + cnt + "] == null ? null : ");
w.append(type).append(".valueOf((String)ret[" + cnt + "]);\n");
} else if (isPrimitive(type)) {
w.append(" this.prop_").append(pn);
w.append(" = ((Number)").append("ret[" + cnt + "]).");
w.append(type).append("Value();\n");
} else {
w.append(" this.prop_").append(pn);
w.append(" = (").append(type).append(')');
w.append("ret[" + cnt + "];\n");
}
}
cnt++;
}
w.append(" intKnckt();\n");
w.append(" };\n");
writeToString(props, w);
writeClone(className, props, w);
w.append("}\n");
} finally {
w.close();
}
} catch (IOException ex) {
error("Can't create " + className + ".java", e);
return false;
}
return ok;
}
private boolean processPage(Element e) {
boolean ok = true;
Page p = e.getAnnotation(Page.class);
if (p == null) {
return true;
}
String pkg = findPkgName(e);
ProcessPage pp;
try (InputStream is = openStream(pkg, p.xhtml())) {
pp = ProcessPage.readPage(is);
is.close();
} catch (IOException iOException) {
error("Can't read " + p.xhtml() + " as " + iOException.getMessage(), e);
ok = false;
pp = null;
}
Writer w;
String className = p.className();
if (className.isEmpty()) {
int indx = p.xhtml().indexOf('.');
className = p.xhtml().substring(0, indx);
}
try {
StringWriter body = new StringWriter();
List propsGetSet = new ArrayList<>();
List functions = new ArrayList<>();
Map> propsDeps = new HashMap<>();
Map> functionDeps = new HashMap<>();
Prprt[] props = createProps(e, p.properties());
if (!generateComputedProperties(body, props, e.getEnclosedElements(), propsGetSet, propsDeps)) {
ok = false;
}
if (!generateOnChange(e, propsDeps, props, className, functionDeps)) {
ok = false;
}
if (!generateProperties(e, body, props, propsGetSet, propsDeps, functionDeps)) {
ok = false;
}
if (!generateFunctions(e, body, className, e.getEnclosedElements(), functions)) {
ok = false;
}
if (!generateReceive(e, body, className, e.getEnclosedElements(), functions)) {
ok = false;
}
FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
w = new OutputStreamWriter(java.openOutputStream());
try {
w.append("package " + pkg + ";\n");
w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
w.append("import org.apidesign.bck2brwsr.htmlpage.KOList;\n");
w.append("import org.apidesign.bck2brwsr.core.Exported;\n");
w.append("final class ").append(className).append(" {\n");
w.append(" private boolean locked;\n");
if (!initializeOnClick(className, (TypeElement) e, w, pp)) {
ok = false;
} else {
if (pp != null) for (String id : pp.ids()) {
String tag = pp.tagNameForId(id);
String type = type(tag);
w.append(" ").append("public final ").
append(type).append(' ').append(cnstnt(id)).append(" = new ").
append(type).append("(\"").append(id).append("\");\n");
}
}
w.append(" private org.apidesign.bck2brwsr.htmlpage.Knockout ko;\n");
w.append(body.toString());
if (!propsGetSet.isEmpty()) {
w.write("public " + className + " applyBindings() {\n");
w.write(" ko = org.apidesign.bck2brwsr.htmlpage.Knockout.applyBindings(");
w.write(className + ".class, this, ");
writeStringArray(propsGetSet, w);
w.append(", ");
writeStringArray(functions, w);
w.write(");\n return this;\n}\n");
w.write("public void triggerEvent(Element e, OnEvent ev) {\n");
w.write(" org.apidesign.bck2brwsr.htmlpage.Knockout.triggerEvent(e.getId(), ev.getElementPropertyName());\n");
w.write("}\n");
}
w.append("}\n");
} finally {
w.close();
}
} catch (IOException ex) {
error("Can't create " + className + ".java", e);
return false;
}
return ok;
}
private static String type(String tag) {
if (tag.equals("title")) {
return "Title";
}
if (tag.equals("button")) {
return "Button";
}
if (tag.equals("input")) {
return "Input";
}
if (tag.equals("canvas")) {
return "Canvas";
}
if (tag.equals("img")) {
return "Image";
}
return "Element";
}
private static String cnstnt(String id) {
return id.replace('.', '_').replace('-', '_');
}
private boolean initializeOnClick(
String className, TypeElement type, Writer w, ProcessPage pp
) throws IOException {
boolean ok = true;
TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();
{ //for (Element clazz : pe.getEnclosedElements()) {
// if (clazz.getKind() != ElementKind.CLASS) {
// continue;
// }
w.append(" public ").append(className).append("() {\n");
StringBuilder dispatch = new StringBuilder();
int dispatchCnt = 0;
for (Element method : type.getEnclosedElements()) {
On oc = method.getAnnotation(On.class);
if (oc != null) {
for (String id : oc.id()) {
if (pp == null) {
error("id = " + id + " not found in HTML page.", method);
ok = false;
continue;
}
if (pp.tagNameForId(id) == null) {
error("id = " + id + " does not exist in the HTML page. Found only " + pp.ids(), method);
ok = false;
continue;
}
ExecutableElement ee = (ExecutableElement)method;
CharSequence params = wrapParams(ee, id, className, "ev", null);
if (!ee.getModifiers().contains(Modifier.STATIC)) {
error("@On method has to be static", ee);
ok = false;
continue;
}
if (ee.getModifiers().contains(Modifier.PRIVATE)) {
error("@On method can't be private", ee);
ok = false;
continue;
}
w.append(" OnEvent." + oc.event()).append(".of(").append(cnstnt(id)).
append(").perform(new OnDispatch(" + dispatchCnt + "));\n");
dispatch.
append(" case ").append(dispatchCnt).append(": ").
append(type.getSimpleName().toString()).
append('.').append(ee.getSimpleName()).append("(").
append(params).
append("); break;\n");
dispatchCnt++;
}
}
}
w.append(" }\n");
if (dispatchCnt > 0) {
w.append("class OnDispatch implements OnHandler {\n");
w.append(" private final int dispatch;\n");
w.append(" OnDispatch(int d) { dispatch = d; }\n");
w.append(" public void onEvent(Object ev) {\n");
w.append(" switch (dispatch) {\n");
w.append(dispatch);
w.append(" }\n");
w.append(" }\n");
w.append("}\n");
}
}
return ok;
}
@Override
public Iterable getCompletions(
Element element, AnnotationMirror annotation,
ExecutableElement member, String userText
) {
if (!userText.startsWith("\"")) {
return Collections.emptyList();
}
Element cls = findClass(element);
Page p = cls.getAnnotation(Page.class);
String pkg = findPkgName(cls);
ProcessPage pp;
try {
InputStream is = openStream(pkg, p.xhtml());
pp = ProcessPage.readPage(is);
is.close();
} catch (IOException iOException) {
return Collections.emptyList();
}
List cc = new ArrayList<>();
userText = userText.substring(1);
for (String id : pp.ids()) {
if (id.startsWith(userText)) {
cc.add(Completions.of("\"" + id + "\"", id));
}
}
return cc;
}
private static Element findClass(Element e) {
if (e == null) {
return null;
}
Page p = e.getAnnotation(Page.class);
if (p != null) {
return e;
}
return e.getEnclosingElement();
}
private boolean generateProperties(
Element where,
Writer w, Prprt[] properties,
Collection props,
Map> deps,
Map> functionDeps
) throws IOException {
boolean ok = true;
for (Prprt p : properties) {
final String tn;
tn = typeName(where, p);
String[] gs = toGetSet(p.name(), tn, p.array());
if (p.array()) {
w.write("private KOList<" + tn + "> prop_" + p.name() + " = new KOList<" + tn + ">(\""
+ p.name() + "\"");
Collection dependants = deps.get(p.name());
if (dependants != null) {
for (String depProp : dependants) {
w.write(", ");
w.write('\"');
w.write(depProp);
w.write('\"');
}
}
w.write(")");
dependants = functionDeps.get(p.name());
if (dependants != null) {
w.write(".onChange(new Runnable() { public void run() {\n");
for (String call : dependants) {
w.append(call);
}
w.write("}})");
}
w.write(";\n");
w.write("@Exported\n");
w.write("public java.util.List<" + tn + "> " + gs[0] + "() {\n");
w.write(" if (locked) throw new IllegalStateException();\n");
w.write(" prop_" + p.name() + ".assign(ko);\n");
w.write(" return prop_" + p.name() + ";\n");
w.write("}\n");
} else {
w.write("private " + tn + " prop_" + p.name() + ";\n");
w.write("@Exported\n");
w.write("public " + tn + " " + gs[0] + "() {\n");
w.write(" if (locked) throw new IllegalStateException();\n");
w.write(" return prop_" + p.name() + ";\n");
w.write("}\n");
w.write("@Exported\n");
w.write("public void " + gs[1] + "(" + tn + " v) {\n");
w.write(" if (locked) throw new IllegalStateException();\n");
w.write(" prop_" + p.name() + " = v;\n");
w.write(" if (ko != null) {\n");
w.write(" ko.valueHasMutated(\"" + p.name() + "\");\n");
Collection dependants = deps.get(p.name());
if (dependants != null) {
for (String depProp : dependants) {
w.write(" ko.valueHasMutated(\"" + depProp + "\");\n");
}
}
w.write(" }\n");
dependants = functionDeps.get(p.name());
if (dependants != null) {
for (String call : dependants) {
w.append(call);
}
}
w.write("}\n");
}
props.add(p.name());
props.add(gs[2]);
props.add(gs[3]);
props.add(gs[0]);
}
return ok;
}
private boolean generateComputedProperties(
Writer w, Prprt[] fixedProps,
Collection arr, Collection props,
Map> deps
) throws IOException {
boolean ok = true;
for (Element e : arr) {
if (e.getKind() != ElementKind.METHOD) {
continue;
}
if (e.getAnnotation(ComputedProperty.class) == null) {
continue;
}
ExecutableElement ee = (ExecutableElement)e;
final TypeMirror rt = ee.getReturnType();
final Types tu = processingEnv.getTypeUtils();
TypeMirror ert = tu.erasure(rt);
String tn = fqn(ert, ee);
boolean array = false;
if (tn.equals("java.util.List")) {
array = true;
}
final String sn = ee.getSimpleName().toString();
String[] gs = toGetSet(sn, tn, array);
w.write("@Exported\n");
w.write("public " + tn + " " + gs[0] + "() {\n");
w.write(" if (locked) throw new IllegalStateException();\n");
int arg = 0;
for (VariableElement pe : ee.getParameters()) {
final String dn = pe.getSimpleName().toString();
if (!verifyPropName(pe, dn, fixedProps)) {
ok = false;
}
final String dt = fqn(pe.asType(), ee);
String[] call = toGetSet(dn, dt, false);
w.write(" " + dt + " arg" + (++arg) + " = ");
w.write(call[0] + "();\n");
Collection depends = deps.get(dn);
if (depends == null) {
depends = new LinkedHashSet<>();
deps.put(dn, depends);
}
depends.add(sn);
}
w.write(" try {\n");
w.write(" locked = true;\n");
w.write(" return " + fqn(ee.getEnclosingElement().asType(), ee) + '.' + e.getSimpleName() + "(");
String sep = "";
for (int i = 1; i <= arg; i++) {
w.write(sep);
w.write("arg" + i);
sep = ", ";
}
w.write(");\n");
w.write(" } finally {\n");
w.write(" locked = false;\n");
w.write(" }\n");
w.write("}\n");
props.add(e.getSimpleName().toString());
props.add(gs[2]);
props.add(null);
props.add(gs[0]);
}
return ok;
}
private static String[] toGetSet(String name, String type, boolean array) {
String n = Character.toUpperCase(name.charAt(0)) + name.substring(1);
String bck2brwsrType = "L" + type.replace('.', '_') + "_2";
if ("int".equals(type)) {
bck2brwsrType = "I";
}
if ("double".equals(type)) {
bck2brwsrType = "D";
}
String pref = "get";
if ("boolean".equals(type)) {
pref = "is";
bck2brwsrType = "Z";
}
final String nu = n.replace('.', '_');
if (array) {
return new String[] {
"get" + n,
null,
"get" + nu + "__Ljava_util_List_2",
null
};
}
return new String[]{
pref + n,
"set" + n,
pref + nu + "__" + bck2brwsrType,
"set" + nu + "__V" + bck2brwsrType
};
}
private String typeName(Element where, Prprt p) {
String ret;
boolean[] isModel = { false };
boolean[] isEnum = { false };
boolean isPrimitive[] = { false };
ret = checkType(p, isModel, isEnum, isPrimitive);
if (p.array()) {
String bt = findBoxedType(ret);
if (bt != null) {
return bt;
}
}
return ret;
}
private static String findBoxedType(String ret) {
if (ret.equals("boolean")) {
return Boolean.class.getName();
}
if (ret.equals("byte")) {
return Byte.class.getName();
}
if (ret.equals("short")) {
return Short.class.getName();
}
if (ret.equals("char")) {
return Character.class.getName();
}
if (ret.equals("int")) {
return Integer.class.getName();
}
if (ret.equals("long")) {
return Long.class.getName();
}
if (ret.equals("float")) {
return Float.class.getName();
}
if (ret.equals("double")) {
return Double.class.getName();
}
return null;
}
private boolean verifyPropName(Element e, String propName, Prprt[] existingProps) {
StringBuilder sb = new StringBuilder();
String sep = "";
for (Prprt Prprt : existingProps) {
if (Prprt.name().equals(propName)) {
return true;
}
sb.append(sep);
sb.append('"');
sb.append(Prprt.name());
sb.append('"');
sep = ", ";
}
error(
propName + " is not one of known properties: " + sb
, e
);
return false;
}
private static String findPkgName(Element e) {
for (;;) {
if (e.getKind() == ElementKind.PACKAGE) {
return ((PackageElement)e).getQualifiedName().toString();
}
e = e.getEnclosingElement();
}
}
private boolean generateFunctions(
Element clazz, StringWriter body, String className,
List enclosedElements, List functions
) {
for (Element m : enclosedElements) {
if (m.getKind() != ElementKind.METHOD) {
continue;
}
ExecutableElement e = (ExecutableElement)m;
OnFunction onF = e.getAnnotation(OnFunction.class);
if (onF == null) {
continue;
}
if (!e.getModifiers().contains(Modifier.STATIC)) {
error("@OnFunction method needs to be static", e);
return false;
}
if (e.getModifiers().contains(Modifier.PRIVATE)) {
error("@OnFunction method cannot be private", e);
return false;
}
if (e.getReturnType().getKind() != TypeKind.VOID) {
error("@OnFunction method should return void", e);
return false;
}
String n = e.getSimpleName().toString();
body.append("@Exported\n");
body.append("private void ").append(n).append("(Object data, Object ev) {\n");
body.append(" ").append(clazz.getSimpleName()).append(".").append(n).append("(");
body.append(wrapParams(e, null, className, "ev", "data"));
body.append(");\n");
body.append("}\n");
functions.add(n);
functions.add(n + "__VLjava_lang_Object_2Ljava_lang_Object_2");
}
return true;
}
private boolean generateOnChange(Element clazz, Map> propDeps,
Prprt[] properties, String className,
Map> functionDeps
) {
for (Element m : clazz.getEnclosedElements()) {
if (m.getKind() != ElementKind.METHOD) {
continue;
}
ExecutableElement e = (ExecutableElement) m;
OnPropertyChange onPC = e.getAnnotation(OnPropertyChange.class);
if (onPC == null) {
continue;
}
for (String pn : onPC.value()) {
if (findPrprt(properties, pn) == null && findDerivedFrom(propDeps, pn).isEmpty()) {
error("No Prprt named '" + pn + "' in the model", clazz);
return false;
}
}
if (!e.getModifiers().contains(Modifier.STATIC)) {
error("@OnPrprtChange method needs to be static", e);
return false;
}
if (e.getModifiers().contains(Modifier.PRIVATE)) {
error("@OnPrprtChange method cannot be private", e);
return false;
}
if (e.getReturnType().getKind() != TypeKind.VOID) {
error("@OnPrprtChange method should return void", e);
return false;
}
String n = e.getSimpleName().toString();
for (String pn : onPC.value()) {
StringBuilder call = new StringBuilder();
call.append(" ").append(clazz.getSimpleName()).append(".").append(n).append("(");
call.append(wrapPropName(e, className, "name", pn));
call.append(");\n");
Collection change = functionDeps.get(pn);
if (change == null) {
change = new ArrayList<>();
functionDeps.put(pn, change);
}
change.add(call.toString());
for (String dpn : findDerivedFrom(propDeps, pn)) {
change = functionDeps.get(dpn);
if (change == null) {
change = new ArrayList<>();
functionDeps.put(dpn, change);
}
change.add(call.toString());
}
}
}
return true;
}
private boolean generateReceive(
Element clazz, StringWriter body, String className,
List enclosedElements, List functions
) {
for (Element m : enclosedElements) {
if (m.getKind() != ElementKind.METHOD) {
continue;
}
ExecutableElement e = (ExecutableElement)m;
OnReceive onR = e.getAnnotation(OnReceive.class);
if (onR == null) {
continue;
}
if (!e.getModifiers().contains(Modifier.STATIC)) {
error("@OnReceive method needs to be static", e);
return false;
}
if (e.getModifiers().contains(Modifier.PRIVATE)) {
error("@OnReceive method cannot be private", e);
return false;
}
if (e.getReturnType().getKind() != TypeKind.VOID) {
error("@OnReceive method should return void", e);
return false;
}
String modelClass = null;
boolean expectsList = false;
List args = new ArrayList<>();
{
for (VariableElement ve : e.getParameters()) {
TypeMirror modelType = null;
if (ve.asType().toString().equals(className)) {
args.add(className + ".this");
} else if (isModel(ve.asType())) {
modelType = ve.asType();
} else if (ve.asType().getKind() == TypeKind.ARRAY) {
modelType = ((ArrayType)ve.asType()).getComponentType();
expectsList = true;
}
if (modelType != null) {
if (modelClass != null) {
error("There can be only one model class among arguments", e);
} else {
modelClass = modelType.toString();
if (expectsList) {
args.add("arr");
} else {
args.add("arr[0]");
}
}
}
}
}
if (modelClass == null) {
error("The method needs to have one @Model class as parameter", e);
}
String n = e.getSimpleName().toString();
body.append("public void ").append(n).append("(");
StringBuilder assembleURL = new StringBuilder();
String jsonpVarName = null;
{
String sep = "";
boolean skipJSONP = onR.jsonp().isEmpty();
for (String p : findParamNames(e, onR.url(), assembleURL)) {
if (!skipJSONP && p.equals(onR.jsonp())) {
skipJSONP = true;
jsonpVarName = p;
continue;
}
body.append(sep);
body.append("String ").append(p);
sep = ", ";
}
if (!skipJSONP) {
error(
"Name of jsonp attribute ('" + onR.jsonp() +
"') is not used in url attribute '" + onR.url() + "'", e
);
}
}
body.append(") {\n");
body.append(" final Object[] result = { null };\n");
body.append(
" class ProcessResult implements Runnable {\n" +
" @Override\n" +
" public void run() {\n" +
" Object value = result[0];\n");
body.append(
" " + modelClass + "[] arr;\n");
body.append(
" if (value instanceof Object[]) {\n" +
" Object[] data = ((Object[])value);\n" +
" arr = new " + modelClass + "[data.length];\n" +
" for (int i = 0; i < data.length; i++) {\n" +
" arr[i] = new " + modelClass + "(data[i]);\n" +
" }\n" +
" } else {\n" +
" arr = new " + modelClass + "[1];\n" +
" arr[0] = new " + modelClass + "(value);\n" +
" }\n"
);
{
body.append(clazz.getSimpleName()).append(".").append(n).append("(");
String sep = "";
for (String arg : args) {
body.append(sep);
body.append(arg);
sep = ", ";
}
body.append(");\n");
}
body.append(
" }\n" +
" }\n"
);
body.append(" ProcessResult pr = new ProcessResult();\n");
if (jsonpVarName != null) {
body.append(" String ").append(jsonpVarName).
append(" = org.apidesign.bck2brwsr.htmlpage.ConvertTypes.createJSONP(result, pr);\n");
}
body.append(" org.apidesign.bck2brwsr.htmlpage.ConvertTypes.loadJSON(\n ");
body.append(assembleURL);
body.append(", result, pr, ").append(jsonpVarName).append("\n );\n");
// body.append(" ").append(clazz.getSimpleName()).append(".").append(n).append("(");
// body.append(wrapParams(e, null, className, "ev", "data"));
// body.append(");\n");
body.append("}\n");
}
return true;
}
private CharSequence wrapParams(
ExecutableElement ee, String id, String className, String evName, String dataName
) {
TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();
StringBuilder params = new StringBuilder();
boolean first = true;
for (VariableElement ve : ee.getParameters()) {
if (!first) {
params.append(", ");
}
first = false;
String toCall = null;
if (ve.asType() == stringType) {
if (ve.getSimpleName().contentEquals("id")) {
params.append('"').append(id).append('"');
continue;
}
toCall = "org.apidesign.bck2brwsr.htmlpage.ConvertTypes.toString(";
}
if (ve.asType().getKind() == TypeKind.DOUBLE) {
toCall = "org.apidesign.bck2brwsr.htmlpage.ConvertTypes.toDouble(";
}
if (ve.asType().getKind() == TypeKind.INT) {
toCall = "org.apidesign.bck2brwsr.htmlpage.ConvertTypes.toInt(";
}
if (dataName != null && ve.getSimpleName().contentEquals(dataName) && isModel(ve.asType())) {
toCall = "org.apidesign.bck2brwsr.htmlpage.ConvertTypes.toModel(" + ve.asType() + ".class, ";
}
if (toCall != null) {
params.append(toCall);
if (dataName != null && ve.getSimpleName().contentEquals(dataName)) {
params.append(dataName);
params.append(", null");
} else {
if (evName == null) {
final StringBuilder sb = new StringBuilder();
sb.append("Unexpected string parameter name.");
if (dataName != null) {
sb.append(" Try \"").append(dataName).append("\"");
}
error(sb.toString(), ee);
}
params.append(evName);
params.append(", \"");
params.append(ve.getSimpleName().toString());
params.append("\"");
}
params.append(")");
continue;
}
String rn = fqn(ve.asType(), ee);
int last = rn.lastIndexOf('.');
if (last >= 0) {
rn = rn.substring(last + 1);
}
if (rn.equals(className)) {
params.append(className).append(".this");
continue;
}
error(
"@On method can only accept String named 'id' or " + className + " arguments",
ee
);
}
return params;
}
private CharSequence wrapPropName(
ExecutableElement ee, String className, String propName, String propValue
) {
TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();
StringBuilder params = new StringBuilder();
boolean first = true;
for (VariableElement ve : ee.getParameters()) {
if (!first) {
params.append(", ");
}
first = false;
if (ve.asType() == stringType) {
if (propName != null && ve.getSimpleName().contentEquals(propName)) {
params.append('"').append(propValue).append('"');
} else {
error("Unexpected string parameter name. Try \"" + propName + "\".", ee);
}
continue;
}
String rn = fqn(ve.asType(), ee);
int last = rn.lastIndexOf('.');
if (last >= 0) {
rn = rn.substring(last + 1);
}
if (rn.equals(className)) {
params.append(className).append(".this");
continue;
}
error(
"@OnPrprtChange method can only accept String or " + className + " arguments",
ee);
}
return params;
}
private boolean isModel(TypeMirror tm) {
final Element e = processingEnv.getTypeUtils().asElement(tm);
if (e == null) {
return false;
}
for (Element ch : e.getEnclosedElements()) {
if (ch.getKind() == ElementKind.METHOD) {
ExecutableElement ee = (ExecutableElement)ch;
if (ee.getParameters().isEmpty() && ee.getSimpleName().contentEquals("modelFor")) {
return true;
}
}
}
return models.values().contains(e.getSimpleName().toString());
}
private void writeStringArray(List strings, Writer w) throws IOException {
w.write("new String[] {\n");
String sep = "";
for (String n : strings) {
w.write(sep);
if (n == null) {
w.write(" null");
} else {
w.write(" \"" + n + "\"");
}
sep = ",\n";
}
w.write("\n }");
}
private void writeToString(Prprt[] props, Writer w) throws IOException {
w.write(" public String toString() {\n");
w.write(" StringBuilder sb = new StringBuilder();\n");
w.write(" sb.append('{');\n");
String sep = "";
for (Prprt p : props) {
w.write(sep);
w.append(" sb.append('\"').append(\"" + p.name() + "\")");
w.append(".append('\"').append(\":\");\n");
w.append(" sb.append(org.apidesign.bck2brwsr.htmlpage.ConvertTypes.toJSON(prop_");
w.append(p.name()).append("));\n");
sep = " sb.append(',');\n";
}
w.write(" sb.append('}');\n");
w.write(" return sb.toString();\n");
w.write(" }\n");
}
private void writeClone(String className, Prprt[] props, Writer w) throws IOException {
w.write(" public " + className + " clone() {\n");
w.write(" " + className + " ret = new " + className + "();\n");
for (Prprt p : props) {
if (!p.array()) {
boolean isModel[] = { false };
boolean isEnum[] = { false };
boolean isPrimitive[] = { false };
checkType(p, isModel, isEnum, isPrimitive);
if (!isModel[0]) {
w.write(" ret.prop_" + p.name() + " = prop_" + p.name() + ";\n");
continue;
}
w.write(" ret.prop_" + p.name() + " = prop_" + p.name() + ".clone();\n");
} else {
w.write(" ret.prop_" + p.name() + " = prop_" + p.name() + ".clone();\n");
}
}
w.write(" return ret;\n");
w.write(" }\n");
}
private String inPckName(Element e) {
StringBuilder sb = new StringBuilder();
while (e.getKind() != ElementKind.PACKAGE) {
if (sb.length() == 0) {
sb.append(e.getSimpleName());
} else {
sb.insert(0, '.');
sb.insert(0, e.getSimpleName());
}
e = e.getEnclosingElement();
}
return sb.toString();
}
private String fqn(TypeMirror pt, Element relative) {
if (pt.getKind() == TypeKind.ERROR) {
final Elements eu = processingEnv.getElementUtils();
PackageElement pckg = eu.getPackageOf(relative);
return pckg.getQualifiedName() + "." + pt.toString();
}
return pt.toString();
}
private String checkType(Prprt p, boolean[] isModel, boolean[] isEnum, boolean[] isPrimitive) {
TypeMirror tm;
try {
String ret = p.typeName(processingEnv);
TypeElement e = processingEnv.getElementUtils().getTypeElement(ret);
if (e == null) {
isModel[0] = true;
isEnum[0] = false;
isPrimitive[0] = false;
return ret;
}
tm = e.asType();
} catch (MirroredTypeException ex) {
tm = ex.getTypeMirror();
}
tm = processingEnv.getTypeUtils().erasure(tm);
isPrimitive[0] = tm.getKind().isPrimitive();
final Element e = processingEnv.getTypeUtils().asElement(tm);
final Model m = e == null ? null : e.getAnnotation(Model.class);
String ret;
if (m != null) {
ret = findPkgName(e) + '.' + m.className();
isModel[0] = true;
models.put(e, m.className());
} else if (findModelForMthd(e)) {
ret = ((TypeElement)e).getQualifiedName().toString();
isModel[0] = true;
} else {
ret = tm.toString();
int idx = ret.indexOf(".");
if (idx >= 0) {
ret = ret.substring(idx + 7);
isEnum[0] = false;
return ret;
}
}
TypeMirror enm = processingEnv.getElementUtils().getTypeElement("java.lang.Enum").asType();
enm = processingEnv.getTypeUtils().erasure(enm);
isEnum[0] = processingEnv.getTypeUtils().isSubtype(tm, enm);
return ret;
}
private static boolean findModelForMthd(Element clazz) {
if (clazz == null) {
return false;
}
for (Element e : clazz.getEnclosedElements()) {
if (e.getKind() == ElementKind.METHOD) {
ExecutableElement ee = (ExecutableElement)e;
if (
ee.getSimpleName().contentEquals("modelFor") &&
ee.getParameters().isEmpty()
) {
return true;
}
}
}
return false;
}
private Iterable findParamNames(Element e, String url, StringBuilder assembleURL) {
List params = new ArrayList<>();
for (int pos = 0; ;) {
int next = url.indexOf('{', pos);
if (next == -1) {
assembleURL.append('"')
.append(url.substring(pos))
.append('"');
return params;
}
int close = url.indexOf('}', next);
if (close == -1) {
error("Unbalanced '{' and '}' in " + url, e);
return params;
}
final String paramName = url.substring(next + 1, close);
params.add(paramName);
assembleURL.append('"')
.append(url.substring(pos, next))
.append("\" + ").append(paramName).append(" + ");
pos = close + 1;
}
}
private static Prprt findPrprt(Prprt[] properties, String propName) {
for (Prprt p : properties) {
if (propName.equals(p.name())) {
return p;
}
}
return null;
}
private boolean isPrimitive(String type) {
return
"int".equals(type) ||
"double".equals(type) ||
"long".equals(type) ||
"short".equals(type) ||
"byte".equals(type) ||
"float".equals(type);
}
private static Collection findDerivedFrom(Map> propsDeps, String derivedProp) {
Set names = new HashSet<>();
for (Map.Entry> e : propsDeps.entrySet()) {
if (e.getValue().contains(derivedProp)) {
names.add(e.getKey());
}
}
return names;
}
private Prprt[] createProps(Element e, Property[] arr) {
Prprt[] ret = Prprt.wrap(processingEnv, e, arr);
Prprt[] prev = verify.put(e, ret);
if (prev != null) {
error("Two sets of properties for ", e);
}
return ret;
}
@ExtraJavaScript(processByteCode = false, resource = "")
private static class Prprt {
private final Element e;
private final AnnotationMirror tm;
private final Property p;
public Prprt(Element e, AnnotationMirror tm, Property p) {
this.e = e;
this.tm = tm;
this.p = p;
}
String name() {
return p.name();
}
boolean array() {
return p.array();
}
String typeName(ProcessingEnvironment env) {
try {
return p.type().getName();
} catch (IncompleteAnnotationException | AnnotationTypeMismatchException ex) {
for (Object v : getAnnoValues(env)) {
String s = v.toString().replace(" ", "");
if (s.startsWith("type=") && s.endsWith(".class")) {
return s.substring(5, s.length() - 6);
}
}
throw ex;
}
}
static Prprt[] wrap(ProcessingEnvironment pe, Element e, Property[] arr) {
if (arr.length == 0) {
return new Prprt[0];
}
if (e.getKind() != ElementKind.CLASS) {
throw new IllegalStateException("" + e.getKind());
}
TypeElement te = (TypeElement)e;
List val = null;
for (AnnotationMirror an : te.getAnnotationMirrors()) {
for (Map.Entry entry : an.getElementValues().entrySet()) {
if (entry.getKey().getSimpleName().contentEquals("properties")) {
val = (List)entry.getValue().getValue();
break;
}
}
}
if (val == null || val.size() != arr.length) {
pe.getMessager().printMessage(Diagnostic.Kind.ERROR, "" + val, e);
return new Prprt[0];
}
Prprt[] ret = new Prprt[arr.length];
BIG: for (int i = 0; i < ret.length; i++) {
AnnotationMirror am = (AnnotationMirror)val.get(i).getValue();
ret[i] = new Prprt(e, am, arr[i]);
}
return ret;
}
private List getAnnoValues(ProcessingEnvironment pe) {
try {
Class trees = Class.forName("com.sun.tools.javac.api.JavacTrees");
Method m = trees.getMethod("instance", ProcessingEnvironment.class);
Object instance = m.invoke(null, pe);
m = instance.getClass().getMethod("getPath", Element.class, AnnotationMirror.class);
Object path = m.invoke(instance, e, tm);
m = path.getClass().getMethod("getLeaf");
Object leaf = m.invoke(path);
m = leaf.getClass().getMethod("getArguments");
return (List)m.invoke(leaf);
} catch (Exception ex) {
return Collections.emptyList();
}
}
}
}
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