Beispiel #1
0
  BuildMetaClass make(final String proxyClassName,
                      final MetaClass toProxy,
                      final String privateAccessorType) {
    final ClassStructureBuilder builder;



    final boolean renderEqualsAndHash;
    if (!toProxy.isInterface()) {
      renderEqualsAndHash = true;
      if (toProxy.isFinal()) {
        throw new UnproxyableClassException(toProxy, toProxy.getFullyQualifiedName()
            + " is an unproxiable class because it is final");
      }
      if (!toProxy.isDefaultInstantiable()) {
        throw new UnproxyableClassException(toProxy, toProxy.getFullyQualifiedName() + " must have a default " +
            "no-arg constructor");
      }

      builder = ClassBuilder.define(proxyClassName, toProxy).publicScope().body();
    }
    else {
      renderEqualsAndHash = false;
      builder = ClassBuilder.define(proxyClassName).publicScope().implementsInterface(toProxy).body();
    }

    final String proxyVar = "$$_proxy_$$";

    final Set<String> renderedMethods = new HashSet<String>();

    final Map<String, MetaType> typeVariableMap = new HashMap<String, MetaType>();
    final MetaParameterizedType metaParameterizedType = toProxy.getParameterizedType();

    if (metaParameterizedType != null) {
      int i = 0;
      for (final MetaTypeVariable metaTypeVariable : toProxy.getTypeParameters()) {
        typeVariableMap.put(metaTypeVariable.getName(), metaParameterizedType.getTypeParameters()[i++]);
      }
    }

    builder.privateField(proxyVar, toProxy).finish();

    final Set<Map.Entry<String, ProxyProperty>> entries = proxyProperties.entrySet();
    for (final Map.Entry<String, ProxyProperty> entry : entries) {
      builder.privateField(entry.getValue().getEncodedProperty(), entry.getValue().getType()).finish();
      builder.packageMethod(void.class, "$set_" + entry.getKey(), Parameter.of(entry.getValue().getType(), "o"))
          .append(Stmt.loadVariable(entry.getValue().getEncodedProperty()).assignValue(Refs.get("o")))
          .finish();
    }

    for (final MetaMethod method : toProxy.getMethods()) {
      final String methodString = GenUtil.getMethodString(method);
      if (renderedMethods.contains(methodString) || method.getName().equals("hashCode")
          || (method.getName().equals("equals") && method.getParameters().length == 1
          && method.getParameters()[0].getType().getFullyQualifiedName().equals(Object.class.getName()))) continue;

      renderedMethods.add(methodString);

      if ((!method.isPublic() && !method.isProtected()) ||
          method.isSynthetic() ||
          method.isFinal() ||
          method.isStatic() ||
          method.getDeclaringClass().getFullyQualifiedName().equals(Object.class.getName()))
        continue;

      final List<Parameter> methodParms = new ArrayList<Parameter>();
      final MetaParameter[] parameters = method.getParameters();

      for (int i = 0; i < parameters.length; i++) {
        methodParms.add(Parameter.of(parameters[i].getType().getErased(), "a" + i));
      }

      final DefParameters defParameters = DefParameters.fromParameters(methodParms);
      final BlockBuilder methBody = builder.publicMethod(method.getReturnType(), method.getName())
          .annotatedWith(OVERRIDE_ANNOTATION)
          .parameters(defParameters)
          .throws_(method.getCheckedExceptions());

      methBody.appendAll(getAroundInvokeStatements(method));
      methBody.appendAll(getBeforeStatements(method));

      final List<Parameter> parms = defParameters.getParameters();

      final Statement[] statementVars = new Statement[parms.size()];
      for (int i = 0; i < parms.size(); i++) {
        statementVars[i] = loadVariable(parms.get(i).getName());
      }

      if (!method.isPublic()) {
        PrivateAccessUtil.addPrivateAccessStubs(privateAccessorType, builder, method, new Modifier[0]);

        final Statement[] privateAccessStmts = new Statement[statementVars.length + 1];
        privateAccessStmts[0] = Refs.get(proxyVar);
        System.arraycopy(statementVars, 0, privateAccessStmts, 1, statementVars.length);

        if (method.getReturnType().isVoid()) {
          methBody._(loadVariable("this").invoke(PrivateAccessUtil.getPrivateMethodName(method), privateAccessStmts));
        }
        else {
          methBody._(loadVariable("this").invoke(PrivateAccessUtil.getPrivateMethodName(method), privateAccessStmts).returnValue());
        }
      }
      else {
        if (method.getReturnType().isVoid()) {
          methBody._(loadVariable(proxyVar).invoke(method, statementVars));
        }
        else {
          methBody._(loadVariable(proxyVar).invoke(method, statementVars).returnValue());
        }
      }

      methBody.appendAll(getAfterStatements(method));
      methBody.appendAll(getAroundInvokeStatements(method));

      methBody.finish();
    }

    if (renderEqualsAndHash) {
      // implement hashCode()
      builder.publicMethod(int.class, "hashCode")
          .annotatedWith(OVERRIDE_ANNOTATION)
          .body()
          ._(
              If.isNull(loadVariable(proxyVar))
                  ._(throw_(IllegalStateException.class, "call to hashCode() on an unclosed proxy."))
                  .finish()
                  .else_()
                  ._(Stmt.loadVariable(proxyVar).invoke("hashCode").returnValue())
                  .finish()
          )
          .finish();

      // implements equals()
      builder.publicMethod(boolean.class, "equals", Parameter.of(Object.class, "o"))
          .annotatedWith(OVERRIDE_ANNOTATION)
          .body()
          ._(
              If.isNull(loadVariable(proxyVar))
                  ._(throw_(IllegalStateException.class, "call to equals() on an unclosed proxy."))
                  .finish()
                  .else_()
                  ._(Stmt.loadVariable(proxyVar).invoke("equals", Refs.get("o")).returnValue())
                  .finish()
          )
          .finish();
    }

    builder.publicMethod(void.class, PROXY_BIND_METHOD).parameters(DefParameters.of(Parameter.of(toProxy, "proxy")))
        ._(loadVariable(proxyVar).assignValue(loadVariable("proxy"))).finish();

    return builder.getClassDefinition();
  }
  private void appendPageShowMethod(
      AnonymousClassStructureBuilder pageImplBuilder,
      MetaClass pageClass,
      Class<? extends Annotation> annotation,
      boolean addPrivateAccessors) {
    BlockBuilder<?> method =
        pageImplBuilder
            .publicMethod(
                void.class,
                createMethodNameFromAnnotation(annotation),
                Parameter.of(pageClass, "widget"),
                Parameter.of(HistoryToken.class, "state"))
            .body();

    int idx = 0;

    method.append(Stmt.declareFinalVariable("pageState", Map.class, new HashMap<String, Object>()));
    for (MetaField field : pageClass.getFieldsAnnotatedWith(PageState.class)) {
      PageState psAnno = field.getAnnotation(PageState.class);
      String fieldName = field.getName();
      String queryParamName = psAnno.value();
      if (queryParamName == null || queryParamName.trim().isEmpty()) {
        queryParamName = fieldName;
      }

      if (addPrivateAccessors) {
        PrivateAccessUtil.addPrivateAccessStubs(
            PrivateAccessType.Write, "jsni", pageImplBuilder, field, new Modifier[] {});
      }

      String injectorName = PrivateAccessUtil.getPrivateFieldInjectorName(field);

      MetaClass erasedFieldType = field.getType().getErased();
      if (erasedFieldType.isAssignableTo(Collection.class)) {
        MetaClass elementType =
            MarshallingGenUtil.getConcreteCollectionElementType(field.getType());
        if (elementType == null) {
          throw new UnsupportedOperationException(
              "Found a @PageState field with a Collection type but without a concrete type parameter. "
                  + "Collection-typed @PageState fields must specify a concrete type parameter.");
        }
        if (erasedFieldType.equals(MetaClassFactory.get(Set.class))) {
          method.append(Stmt.declareVariable(fieldName, Stmt.newObject(HashSet.class)));
        } else if (erasedFieldType.equals(MetaClassFactory.get(List.class))
            || erasedFieldType.equals(MetaClassFactory.get(Collection.class))) {
          method.append(Stmt.declareVariable(fieldName, Stmt.newObject(ArrayList.class)));
        } else {
          throw new UnsupportedOperationException(
              "Found a @PageState field which is a collection of type "
                  + erasedFieldType.getFullyQualifiedName()
                  + ". For collection-valued fields, only the exact types java.util.Collection, java.util.Set, and "
                  + "java.util.List are supported at this time.");
        }

        // for (String fv{idx} : state.get({fieldName}))
        method.append(
            Stmt.loadVariable("state")
                .invoke("getState")
                .invoke("get", queryParamName)
                .foreach("elem", Object.class)
                .append(
                    Stmt.declareVariable(
                        "fv" + idx, Stmt.castTo(String.class, Stmt.loadVariable("elem"))))
                .append(
                    Stmt.loadVariable(fieldName)
                        .invoke(
                            "add",
                            paramFromStringStatement(elementType, Stmt.loadVariable("fv" + idx))))
                .append(
                    Stmt.loadVariable("pageState")
                        .invoke("put", fieldName, Stmt.loadVariable(fieldName)))
                .finish());
        method.append(
            Stmt.loadVariable("this")
                .invoke(injectorName, Stmt.loadVariable("widget"), Stmt.loadVariable(fieldName)));
      } else {
        method.append(
            Stmt.declareFinalVariable(
                "fv" + idx,
                Collection.class,
                Stmt.loadVariable("state").invoke("getState").invoke("get", queryParamName)));
        method.append(
            If.cond(
                    Bool.or(
                        Bool.isNull(Stmt.loadVariable("fv" + idx)),
                        Stmt.loadVariable("fv" + idx).invoke("isEmpty")))
                .append(
                    Stmt.loadVariable("this")
                        .invoke(
                            injectorName,
                            Stmt.loadVariable("widget"),
                            defaultValueStatement(erasedFieldType)))
                .finish()
                .else_()
                .append(
                    Stmt.loadVariable("this")
                        .invoke(
                            injectorName,
                            Stmt.loadVariable("widget"),
                            paramFromStringStatement(
                                erasedFieldType,
                                Stmt.loadVariable("fv" + idx).invoke("iterator").invoke("next"))))
                .append(
                    Stmt.loadVariable("pageState")
                        .invoke(
                            "put",
                            fieldName,
                            Stmt.loadVariable("fv" + idx).invoke("iterator").invoke("next")))
                .finish());
      }
      idx++;
    }

    if (addPrivateAccessors) {
      method.append(
          Stmt.invokeStatic(
              CDI.class,
              "fireEvent",
              Stmt.newObject(NavigationEvent.class)
                  .withParameters(
                      Stmt.newObject(PageRequest.class)
                          .withParameters(
                              getPageName(pageClass), Stmt.loadVariable("pageState")))));
    }

    checkMethodAndAddPrivateAccessors(
        pageImplBuilder, method, pageClass, annotation, HistoryToken.class, "state");

    method.finish();
  }