platform/lang-impl/src/com/intellij/ide/impl/PsiElementDataValidator.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.ide.impl;

import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.Nullable;

public class PsiElementDataValidator extends DataValidator<PsiElement> {
  @Override
  @Nullable
  public PsiElement findInvalid(final String dataId, PsiElement psiElement, final Object dataSource) {
    return psiElement.isValid() ? null : psiElement;
  }
}