platform/core-api/src/com/intellij/psi/stubs/EmptyStubElementType.java

/*
 * Copyright 2000-2014 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.psi.stubs;

import com.intellij.lang.Language;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.IOException;

/**
 * @author peter
 */
public abstract class EmptyStubElementType<T extends PsiElement> extends IStubElementType<EmptyStub, T> {
  protected EmptyStubElementType(@NotNull @NonNls String debugName, @Nullable Language language) {
    super(debugName, language);
  }

  @Override
  public final EmptyStub createStub(@NotNull T psi, StubElement parentStub) {
    return createStub(parentStub);
  }

  protected EmptyStub createStub(StubElement parentStub) {
    return new EmptyStub(parentStub, this);
  }

  @NotNull
  @Override
  public String getExternalId() {
    return getLanguage().getID() + toString();
  }

  @Override
  public final void serialize(@NotNull EmptyStub stub, @NotNull StubOutputStream dataStream) throws IOException {
  }

  @NotNull
  @Override
  public final EmptyStub deserialize(@NotNull StubInputStream dataStream, StubElement parentStub) throws IOException {
    return createStub(parentStub);
  }

  @Override
  public final void indexStub(@NotNull EmptyStub stub, @NotNull IndexSink sink) {
  }
}