platform/indexing-api/src/com/intellij/psi/stubs/StubIndexExtension.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.
 */

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

import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.psi.PsiElement;
import com.intellij.util.io.KeyDescriptor;
import org.jetbrains.annotations.NotNull;

public interface StubIndexExtension<Key, Psi extends PsiElement> {
  ExtensionPointName<StubIndexExtension> EP_NAME = ExtensionPointName.create("com.intellij.stubIndex");

  @NotNull
  StubIndexKey<Key, Psi> getKey();

  int getVersion();

  @NotNull
  KeyDescriptor<Key> getKeyDescriptor();

  int getCacheSize();
}