javax.lang.model.element.ElementKind#RESOURCE_VARIABLE源码实例Demo

@DefinedBy(Api.LANGUAGE_MODEL)
public ElementKind getKind() {
    long flags = flags();
    if ((flags & PARAMETER) != 0) {
        if (isExceptionParameter())
            return ElementKind.EXCEPTION_PARAMETER;
        else
            return ElementKind.PARAMETER;
    } else if ((flags & ENUM) != 0) {
        return ElementKind.ENUM_CONSTANT;
    } else if (owner.kind == TYP || owner.kind == ERR) {
        return ElementKind.FIELD;
    } else if (isResourceVariable()) {
        return ElementKind.RESOURCE_VARIABLE;
    } else {
        return ElementKind.LOCAL_VARIABLE;
    }
}
 

public Object getConstValue() {
    // TODO: Consider if getConstValue and getConstantValue can be collapsed
    if (data == ElementKind.EXCEPTION_PARAMETER ||
        data == ElementKind.RESOURCE_VARIABLE) {
        return null;
    } else if (data instanceof Callable<?>) {
        // In this case, this is a final variable, with an as
        // yet unevaluated initializer.
        Callable<?> eval = (Callable<?>)data;
        data = null; // to make sure we don't evaluate this twice.
        try {
            data = eval.call();
        } catch (Exception ex) {
            throw new AssertionError(ex);
        }
    }
    return data;
}
 

protected static boolean isVariableValidForVarHint(HintContext ctx) {
    CompilationInfo info = ctx.getInfo();
    TreePath treePath = ctx.getPath();
    // hint will be enable only for JDK-10 or above.
    if (info.getSourceVersion().compareTo(SourceVersion.RELEASE_9) < 1) {
        return false;
    }
     if (treePath.getLeaf().getKind() == Tree.Kind.ENHANCED_FOR_LOOP) {
        EnhancedForLoopTree efl = (EnhancedForLoopTree) treePath.getLeaf();
        TypeMirror expressionType = ctx.getInfo().getTrees().getTypeMirror(new TreePath(treePath, efl.getExpression()));
        if (!Utilities.isValidType(expressionType)) {
            return false;
        }
    } else {
        Element treePathELement = info.getTrees().getElement(treePath);
        // should be local variable
        if (treePathELement != null && (treePathELement.getKind() != ElementKind.LOCAL_VARIABLE && treePathELement.getKind() != ElementKind.RESOURCE_VARIABLE)) {
            return false;
        }
    }
    return true;
}
 

@DefinedBy(Api.LANGUAGE_MODEL)
public ElementKind getKind() {
    long flags = flags();
    if ((flags & PARAMETER) != 0) {
        if (isExceptionParameter())
            return ElementKind.EXCEPTION_PARAMETER;
        else
            return ElementKind.PARAMETER;
    } else if ((flags & ENUM) != 0) {
        return ElementKind.ENUM_CONSTANT;
    } else if (owner.kind == TYP || owner.kind == ERR) {
        return ElementKind.FIELD;
    } else if (isResourceVariable()) {
        return ElementKind.RESOURCE_VARIABLE;
    } else {
        return ElementKind.LOCAL_VARIABLE;
    }
}
 

public Object getConstValue() {
    // TODO: Consider if getConstValue and getConstantValue can be collapsed
    if (data == ElementKind.EXCEPTION_PARAMETER ||
        data == ElementKind.RESOURCE_VARIABLE) {
        return null;
    } else if (data instanceof Callable<?>) {
        // In this case, this is a final variable, with an as
        // yet unevaluated initializer.
        Callable<?> eval = (Callable<?>)data;
        data = null; // to make sure we don't evaluate this twice.
        try {
            data = eval.call();
        } catch (Exception ex) {
            throw new AssertionError(ex);
        }
    }
    return data;
}
 

@Override
public Void visitVariable(VariableElement e, Boolean highlightName) {
    modifier(e.getModifiers());
    
    result.append(getTypeName(info, e.asType(), true));
    
    result.append(' ');
    
    boldStartCheck(highlightName);

    result.append(e.getSimpleName());
    
    boldStopCheck(highlightName);
    
    if (highlightName) {
        if (e.getConstantValue() != null) {
            result.append(" = ");
            result.append(StringEscapeUtils.escapeHtml(e.getConstantValue().toString()));
        }
        
        Element enclosing = e.getEnclosingElement();
        
        if (e.getKind() != ElementKind.PARAMETER && e.getKind() != ElementKind.LOCAL_VARIABLE
                && e.getKind() != ElementKind.RESOURCE_VARIABLE && e.getKind() != ElementKind.EXCEPTION_PARAMETER
                && !TreeShims.BINDING_VARIABLE.equals(e.getKind().name())) {
            result.append(" in ");

            //short typename:
            result.append(getTypeName(info, enclosing.asType(), true));
        }
    }
    
    return null;
}
 

private Expression convertIdent(JCIdent identifier) {
  if (isThisExpression(identifier)) {
    return new ThisReference(getCurrentType().getTypeDescriptor());
  }
  if (isSuperExpression(identifier)) {
    return new SuperReference(getCurrentType().getTypeDescriptor());
  }
  Symbol symbol = identifier.sym;
  if (symbol instanceof ClassSymbol) {
    return new JavaScriptConstructorReference(
        environment.createDeclarationForType((ClassSymbol) identifier.sym));
  }
  if (symbol instanceof MethodSymbol) {
    return NullLiteral.get().withComment(identifier.toString());
  }

  VarSymbol varSymbol = (VarSymbol) symbol;
  if (symbol.getKind() == ElementKind.LOCAL_VARIABLE
      || symbol.getKind() == ElementKind.RESOURCE_VARIABLE
      || symbol.getKind() == ElementKind.PARAMETER
      || symbol.getKind() == ElementKind.EXCEPTION_PARAMETER) {
    Variable variable = variableByVariableElement.get(symbol);
    return resolveVariableReference(variable);
  }

  FieldDescriptor fieldDescriptor = environment.createFieldDescriptor(varSymbol, identifier.type);
  Expression qualifier =
      fieldDescriptor.isStatic()
          ? null
          : resolveOuterClassReference(fieldDescriptor.getEnclosingTypeDescriptor(), false);
  return FieldAccess.newBuilder()
      .setQualifier(qualifier)
      .setTargetFieldDescriptor(fieldDescriptor)
      .build();
}
 

public boolean isResourceVariable() {
    return data == ElementKind.RESOURCE_VARIABLE;
}
 

public boolean isResourceVariable() {
    return data == ElementKind.RESOURCE_VARIABLE;
}
 

public static boolean isVariable(Element element) {
  ElementKind kind = element.getKind();
  return kind == ElementKind.FIELD || kind == ElementKind.LOCAL_VARIABLE
      || kind == ElementKind.PARAMETER || kind == ElementKind.EXCEPTION_PARAMETER
      || kind == ElementKind.RESOURCE_VARIABLE || kind == ElementKind.ENUM_CONSTANT;
}