/*
 * Copyright 2010-2016 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 org.jetbrains.kotlin.idea.stubindex

import com.intellij.openapi.project.Project
import com.intellij.psi.search.GlobalSearchScope
import com.intellij.psi.stubs.StringStubIndexExtension
import com.intellij.psi.stubs.StubIndex
import com.intellij.psi.stubs.StubIndexKey
import org.jetbrains.kotlin.psi.KtTypeAlias

class KotlinTopLevelTypeAliasFqNameIndex : StringStubIndexExtension<KtTypeAlias>() {
    override fun getKey(): StubIndexKey<String, KtTypeAlias> = KEY

    override fun get(s: String, project: Project, scope: GlobalSearchScope): Collection<KtTypeAlias> =
            StubIndex.getElements<String, KtTypeAlias>(
                    KEY, s, project,
                    scope, KtTypeAlias::class.java
            )

    companion object {
        val KEY = KotlinIndexUtil.createIndexKey(KotlinTopLevelTypeAliasFqNameIndex::class.java)
        val INSTANCE = KotlinTopLevelTypeAliasFqNameIndex()

        @JvmStatic fun getInstance() = INSTANCE
    }
}

