commonMain.implementations.immutableMap.PersistentHashMapContentViews.kt Maven / Gradle / Ivy

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Kotlin Immutable Collections multiplatform library

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/*
 * Copyright 2016-2019 JetBrains s.r.o.
 * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
 */

package kotlinx.collections.immutable.implementations.immutableMap

import kotlinx.collections.immutable.ImmutableCollection
import kotlinx.collections.immutable.ImmutableSet
import kotlinx.collections.immutable.internal.MapImplementation

internal class PersistentHashMapEntries(private val map: PersistentHashMap) : ImmutableSet>, AbstractSet>() {
    override val size: Int get() = map.size

    override fun contains(element: Map.Entry): Boolean {
        return MapImplementation.containsEntry(map, element)
    }

    override fun iterator(): Iterator> {
        return PersistentHashMapEntriesIterator(map.node)
    }
}

internal class PersistentHashMapKeys(private val map: PersistentHashMap) : ImmutableSet, AbstractSet() {
    override val size: Int
        get() = map.size

    override fun contains(element: K): Boolean {
        return map.containsKey(element)
    }

    override fun iterator(): Iterator {
        return PersistentHashMapKeysIterator(map.node)
    }
}

internal class PersistentHashMapValues(private val map: PersistentHashMap) : ImmutableCollection, AbstractCollection() {
    override val size: Int
        get() = map.size

    override fun contains(element: V): Boolean {
        return map.containsValue(element)
    }

    override fun iterator(): Iterator {
        return PersistentHashMapValuesIterator(map.node)
    }
}