plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/j2me/AnonymousInnerClassMayBeStaticInspectionBase.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.siyeh.ig.j2me;

import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseInspection;
import com.siyeh.ig.BaseInspectionVisitor;
import com.siyeh.ig.performance.InnerClassReferenceVisitor;
import org.jetbrains.annotations.NotNull;

public class AnonymousInnerClassMayBeStaticInspectionBase extends BaseInspection {
  @Override
  @NotNull
  public String getDisplayName() {
    return InspectionGadgetsBundle.message(
      "anonymous.inner.may.be.named.static.inner.class.display.name");
  }

  @Override
  @NotNull
  public String buildErrorString(Object... infos) {
    return InspectionGadgetsBundle.message(
      "anonymous.inner.may.be.named.static.inner.class.problem.descriptor");
  }

  @Override
  public BaseInspectionVisitor buildVisitor() {
    return new AnonymousInnerClassMayBeStaticVisitor();
  }

  private static class AnonymousInnerClassMayBeStaticVisitor
    extends BaseInspectionVisitor {

    @Override
    public void visitClass(@NotNull PsiClass aClass) {
      if (!(aClass instanceof PsiAnonymousClass)) {
        return;
      }
      if (aClass instanceof PsiEnumConstantInitializer) {
        return;
      }
      final PsiMember containingMember =
        PsiTreeUtil.getParentOfType(aClass, PsiMember.class);
      if (containingMember == null ||
          containingMember.hasModifierProperty(PsiModifier.STATIC)) {
        return;
      }
      final PsiAnonymousClass anAnonymousClass =
        (PsiAnonymousClass)aClass;
      final InnerClassReferenceVisitor visitor =
        new InnerClassReferenceVisitor(anAnonymousClass);
      anAnonymousClass.accept(visitor);
      if (!visitor.canInnerClassBeStatic()) {
        return;
      }
      registerClassError(aClass);
    }
  }
}