/*
 * Copyright 2010-2015 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.
 */

package org.jetbrains.kotlin.codegen

import org.jetbrains.kotlin.storage.LockBasedStorageManager

class ClassBuilderOnDemand(createClassBuilder: () -> ClassBuilder) : DelegatingClassBuilder() {
    private val classBuilder = LockBasedStorageManager.NO_LOCKS.createLazyValue(createClassBuilder)

    val isComputed: Boolean
        get() = classBuilder.isComputed()

    override fun getDelegate() = classBuilder()

    fun ensureGenerated() {
        classBuilder()
    }

    override fun done() {
        if (isComputed) {
            classBuilder().done()
        }
    }
}
