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/*
 * Copyright (c) 2019. JetBrains s.r.o.
 * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 */

package jetbrains.datalore.base.observable.event

import jetbrains.datalore.base.registration.Registration

internal class MappingEventSource(
        private val mySourceEventSource: EventSource,
        private val myFunction: (SourceEventT) -> TargetEventT) : EventSource {

    override fun addHandler(handler: EventHandler): Registration {
        return mySourceEventSource.addHandler(object : EventHandler {
            override fun onEvent(event: SourceEventT) {
                handler.onEvent(myFunction(event))
            }
        })
    }
}