AddNullableNotNullAnnotationFix.java

/*
 * Copyright 2000-2009 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.intellij.codeInsight.intention.impl;

import com.intellij.codeInsight.AnnotationUtil;
import com.intellij.codeInsight.intention.AddAnnotationPsiFix;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import org.jetbrains.annotations.NotNull;

public class AddNullableNotNullAnnotationFix extends AddAnnotationPsiFix {
  public AddNullableNotNullAnnotationFix(@NotNull String fqn, @NotNull PsiModifierListOwner owner, @NotNull String... annotationToRemove) {
    super(fqn, owner, PsiNameValuePair.EMPTY_ARRAY, annotationToRemove);
  }

  @Override
  public boolean isAvailable(@NotNull Project project,
                             @NotNull PsiFile file,
                             @NotNull PsiElement startElement,
                             @NotNull PsiElement endElement) {
    if (!super.isAvailable(project, file, startElement, endElement)) {
      return false;
    }
    PsiModifierListOwner owner = getContainer(file, startElement.getTextRange().getStartOffset());
    if (owner == null || AnnotationUtil.isAnnotated(owner, getAnnotationsToRemove()[0], false, false)) {
      return false;
    }
    return canAnnotate(owner);
  }

  static boolean canAnnotate(@NotNull PsiModifierListOwner owner) {
    if (owner instanceof PsiMethod) {
      PsiType returnType = ((PsiMethod)owner).getReturnType();
      return returnType != null && !(returnType instanceof PsiPrimitiveType);
    }

    if (owner instanceof PsiClass) {
      return false;
    }

    return true;
  }

}