python/src/com/jetbrains/python/inspections/quickfix/PyCreatePropertyQuickFix.java

/*
 * 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.quickfix;

import com.intellij.codeInspection.LocalQuickFix;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.jetbrains.python.PyBundle;
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.TypeEvalContext;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;

public class PyCreatePropertyQuickFix implements LocalQuickFix {
  private final AccessDirection myAccessDirection;

  public PyCreatePropertyQuickFix(AccessDirection dir) {
    myAccessDirection = dir;
  }

  @NotNull
  public String getName() {
    return PyBundle.message("QFIX.create.property");
  }

  @NonNls
  @NotNull
  public String getFamilyName() {
    return getName();
  }

  public void applyFix(@NotNull final Project project, @NotNull final ProblemDescriptor descriptor) {
    final PsiElement element = descriptor.getPsiElement();
    if (element instanceof PyQualifiedExpression) {
      final PyExpression qualifier = ((PyQualifiedExpression)element).getQualifier();
      if (qualifier != null) {
        final PyType type = TypeEvalContext.codeAnalysis(element.getContainingFile()).getType(qualifier);
        if (type instanceof PyClassType) {
          final PyClass cls = ((PyClassType)type).getPyClass();
          final String propertyName = ((PyQualifiedExpression)element).getName();
          if (propertyName == null) return;
          final String fieldName = "_" + propertyName;
          final PyElementGenerator generator = PyElementGenerator.getInstance(project);
          final PyFunction property = generator.createProperty(LanguageLevel.forElement(cls), propertyName, fieldName, myAccessDirection);
          PyUtil.addElementToStatementList(property, cls.getStatementList(), myAccessDirection == AccessDirection.READ);
        }
      }
    }
  }
}