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A packaging of the IntelliJ Community Edition core-api library. This is release number 1 of trunk branch 142.

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/*
 * Copyright 2000-2015 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.
 */

/*
 * @author max
 */
package com.intellij.psi.stubs;

import com.intellij.lang.Language;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.psi.PsiFile;
import com.intellij.psi.tree.IStubFileElementType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class PsiFileStubImpl extends StubBase implements PsiFileStub {
  public static final IStubFileElementType TYPE = new IStubFileElementType(Language.ANY);
  private volatile T myFile;
  private volatile String myInvalidationReason;
  private volatile PsiFileStub[] myStubRoots;

  public PsiFileStubImpl(final T file) {
    super(null, null);
    myFile = file;
  }

  @Override
  public T getPsi() {
    return myFile;
  }

  @Override
  public void setPsi(@NotNull final T psi) {
    myFile = psi;
  }

  public void clearPsi(@NotNull String reason) {
    myInvalidationReason = reason;
    myFile = null;
  }

  @Nullable
  public String getInvalidationReason() {
    return myInvalidationReason;
  }

  @Override
  public IStubElementType getStubType() {
    return null;
  }

  @Override
  public IStubFileElementType getType() {
    return TYPE;
  }

  @NotNull
  @Override
  public PsiFileStub[] getStubRoots() {
    PsiFileStub[] roots = myStubRoots;
    return roots == null ? new PsiFileStub[]{this} : roots;
  }

  public void setStubRoots(@NotNull PsiFileStub[] roots) {
    if (roots.length == 0) {
      Logger.getInstance(getClass()).error("Incorrect psi file stub roots count" + this + "," + getStubType());
    }
    myStubRoots = roots;
  }
}