| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.jetbrains.python.inspections; |
| |
| import com.intellij.codeInspection.LocalInspectionToolSession; |
| import com.intellij.codeInspection.ProblemsHolder; |
| import com.intellij.psi.PsiElementVisitor; |
| import com.jetbrains.python.PyNames; |
| import com.jetbrains.python.inspections.quickfix.PyRemoveCallQuickFix; |
| import com.jetbrains.python.psi.*; |
| import com.jetbrains.python.psi.types.PyClassType; |
| import com.jetbrains.python.psi.types.PyType; |
| import com.jetbrains.python.psi.types.PyTypeChecker; |
| import com.jetbrains.python.psi.types.TypeEvalContext; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author yole |
| */ |
| public class PyCallingNonCallableInspection extends PyInspection { |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return "Trying to call a non-callable object"; |
| } |
| |
| @NotNull |
| @Override |
| public PsiElementVisitor buildVisitor(@NotNull ProblemsHolder holder, |
| boolean isOnTheFly, |
| @NotNull LocalInspectionToolSession session) { |
| return new Visitor(holder, session); |
| } |
| |
| public static class Visitor extends PyInspectionVisitor { |
| public Visitor(@Nullable ProblemsHolder holder, @NotNull LocalInspectionToolSession session) { |
| super(holder, session); |
| } |
| |
| @Override |
| public void visitPyCallExpression(PyCallExpression node) { |
| super.visitPyCallExpression(node); |
| checkCallable(node, node.getCallee(), null); |
| } |
| |
| @Override |
| public void visitPyDecoratorList(PyDecoratorList node) { |
| super.visitPyDecoratorList(node); |
| for (PyDecorator decorator : node.getDecorators()) { |
| final PyExpression callee = decorator.getCallee(); |
| checkCallable(decorator, callee, null); |
| if (decorator.hasArgumentList()) { |
| checkCallable(decorator, decorator, null); |
| } |
| } |
| } |
| |
| private void checkCallable(@NotNull PyElement node, @Nullable PyExpression callee, @Nullable PyType type) { |
| final Boolean callable = callee != null ? isCallable(callee, myTypeEvalContext) : PyTypeChecker.isCallable(type); |
| if (callable == null) { |
| return; |
| } |
| if (!callable) { |
| final PyType calleeType = callee != null ? myTypeEvalContext.getType(callee) : type; |
| String message = "Expression is not callable"; |
| if (calleeType instanceof PyClassType) { |
| message = String.format("'%s' object is not callable", calleeType.getName()); |
| } |
| else if (callee != null) { |
| final String name = callee.getName(); |
| if (name != null) { |
| message = String.format("'%s' is not callable", name); |
| } |
| } |
| registerProblem(node, message, new PyRemoveCallQuickFix()); |
| } |
| } |
| } |
| |
| @Nullable |
| private static Boolean isCallable(@NotNull PyExpression element, @NotNull TypeEvalContext context) { |
| if (element instanceof PyQualifiedExpression && PyNames.__CLASS__.equals(element.getName())) { |
| return true; |
| } |
| return PyTypeChecker.isCallable(context.getType(element)); |
| } |
| } |