Denis Zharkov
58 lines
1.5 KiB
Kotlin
Vendored
58 lines
1.5 KiB
Kotlin
Vendored
open class IEquality {
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fun equals(other : Any) : Boolean
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= (this as java.lang.Object).equals(other as java.lang.Object)
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}
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open class IHashable : IEquality {
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val hashCode : Integer
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get() = (this as java.lang.Object).hashCode()
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}
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open class IMap<K, V> {
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fun get(key : K) : V
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fun set(key : K, value : V) : V
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fun remove(key : K) : V
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fun containsKey(key : K) : Boolean
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}
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class HashableWrapper(val obj : Any) : IHashable
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// equals and hashCode implementations are inherited
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@[inline] fun Any.hashable() : HashableWrapper = HashableWrapper(this)
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open class IHashingStrategy<K> {
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fun equals(a : K, b : K) : Boolean
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fun hashCode(a : K) : Integer
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}
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class DefaultHashingStrategy<in K : IHashable> : IHashingStrategy<K> {
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override fun equals(a : K, b : K) : Boolean = a.equals(b)
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override fun hashCode(a : K) : Integer = a.hashCode
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}
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class JavaObjectHashingStrategy<K> : IHashingStrategy<K> {
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override fun equals(a : K, b : K) : Boolean
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= a.hashable().equals(b)
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override fun hashCode(a : K) : Integer
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= a.hashable().hashCode
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}
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class HashMap<K, V> : IMap<K, V> {
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private @[inline] fun hashCode(a : K) = a.hashable().hashCode
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private @[inline] fun equals(a : K, b : K) = a.hashable() == b
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// everything else uses these equals() and hashCode()...
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}
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class StrategyHashMap<K, V>(hashingStrategy : IHashingStrategy<K>) : IMap<K, V> {
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// where !(K : IHashable)
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//this() : this(JavaObjectHashingStrategy<K>()) {}
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//this() where (K : IHashable) : this(DefaultHashingStrategy<K>()) {}
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//...
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} |