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TriggerSink.kt
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TriggerSink.kt
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/*
* Copyright (c) 2022 Block, Inc.
*
* 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 mockwebserver3.internal
import okio.Buffer
import okio.Sink
/**
* A sink that executes [trigger] after [triggerByteCount] bytes are written, and then skips all
* subsequent bytes.
*/
internal class TriggerSink(
private val delegate: Sink,
private val triggerByteCount: Long,
private val trigger: () -> Unit,
) : Sink by delegate {
private var bytesWritten = 0L
override fun write(
source: Buffer,
byteCount: Long,
) {
if (byteCount == 0L) return // Avoid double-triggering.
if (bytesWritten == triggerByteCount) {
source.skip(byteCount)
return
}
val toWrite = minOf(byteCount, triggerByteCount - bytesWritten)
bytesWritten += toWrite
delegate.write(source, toWrite)
if (bytesWritten == triggerByteCount) {
trigger()
}
source.skip(byteCount - toWrite)
}
}