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/*
* Copyright 2010-2017 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.cli.common.repl
import java.io.File
import java.util.concurrent.locks.ReentrantReadWriteLock
import kotlin.concurrent.write
open class GenericReplCompilingEvaluatorBase(
val compiler: ReplCompilerWithoutCheck,
val evaluator: ReplEvaluator,
private val fallbackScriptArgs: ScriptArgsWithTypes? = null
) : ReplFullEvaluator {
override fun createState(lock: ReentrantReadWriteLock): IReplStageState<*> = AggregatedReplStageState(compiler.createState(lock), evaluator.createState(lock), lock)
override fun compileAndEval(state: IReplStageState<*>, codeLine: ReplCodeLine, scriptArgs: ScriptArgsWithTypes?, invokeWrapper: InvokeWrapper?): ReplEvalResult {
if (codeLine.code.trim().isEmpty()) {
return ReplEvalResult.UnitResult()
}
return state.lock.write {
val aggregatedState = state.asState(AggregatedReplStageState::class.java)
val compiled = compiler.compile(state, codeLine)
when (compiled) {
is ReplCompileResult.Error -> {
aggregatedState.apply {
lock.write {
assert(state1.history.size == state2.history.size)
adjustHistories() // needed due to statefulness of AnalyzerEngine - in case of compilation errors the line name reuse leads to #KT-17921
}
}
ReplEvalResult.Error.CompileTime(compiled.message, compiled.location)
}
is ReplCompileResult.Incomplete -> ReplEvalResult.Incomplete(compiled.message)
is ReplCompileResult.CompiledClasses -> {
val result = eval(state, compiled, scriptArgs, invokeWrapper)
when (result) {
is ReplEvalResult.Error,
is ReplEvalResult.HistoryMismatch,
is ReplEvalResult.Incomplete -> {
aggregatedState.apply {
lock.write {
if (state1.history.size > state2.history.size) {
adjustHistories()
assert(state1.history.size == state2.history.size)
}
}
}
result
}
is ReplEvalResult.ValueResult,
is ReplEvalResult.UnitResult ->
result
}
}
}
}
}
override fun eval(state: IReplStageState<*>, compileResult: ReplCompileResult.CompiledClasses, scriptArgs: ScriptArgsWithTypes?, invokeWrapper: InvokeWrapper?): ReplEvalResult =
evaluator.eval(state, compileResult, scriptArgs, invokeWrapper)
override fun compileToEvaluable(state: IReplStageState<*>, codeLine: ReplCodeLine, defaultScriptArgs: ScriptArgsWithTypes?): Pair {
val compiled = compiler.compile(state, codeLine)
return when (compiled) {
// TODO: seems usafe when delayed evaluation may happen after some more compileAndEval calls on the same state; check and fix or protect
is ReplCompileResult.CompiledClasses -> Pair(compiled, DelayedEvaluation(state, compiled, evaluator, defaultScriptArgs ?: fallbackScriptArgs))
else -> Pair(compiled, null)
}
}
class DelayedEvaluation(private val state: IReplStageState<*>,
override val compiledCode: ReplCompileResult.CompiledClasses,
private val evaluator: ReplEvaluator,
private val defaultScriptArgs: ScriptArgsWithTypes?) : Evaluable {
override fun eval(scriptArgs: ScriptArgsWithTypes?, invokeWrapper: InvokeWrapper?): ReplEvalResult =
evaluator.eval(state, compiledCode, scriptArgs ?: defaultScriptArgs, invokeWrapper)
}
}
class GenericReplCompilingEvaluator(
compiler: ReplCompilerWithoutCheck,
baseClasspath: Iterable,
baseClassloader: ClassLoader? = Thread.currentThread().contextClassLoader,
fallbackScriptArgs: ScriptArgsWithTypes? = null,
repeatingMode: ReplRepeatingMode = ReplRepeatingMode.REPEAT_ONLY_MOST_RECENT
) : GenericReplCompilingEvaluatorBase(
compiler,
GenericReplEvaluator(baseClasspath, baseClassloader, fallbackScriptArgs, repeatingMode),
fallbackScriptArgs
)
private fun AggregatedReplStageState<*, *>.adjustHistories(): Iterable? =
state2.history.peek()?.let {
state1.history.resetTo(it.id)
}
?: state1.history.reset()
