org.jglrxavpok.hephaistos.collections.ImmutableByteArray.kt Maven / Gradle / Ivy
package org.jglrxavpok.hephaistos.collections
/**
* Immutable object of [ByteArray].
*
* Can not be modified -- if needed, use [copyArray] to create a mutable [ByteArray] copy.
*/
class ImmutableByteArray constructor(private vararg val numbers: Byte): Iterable {
constructor(length: Int, generator: (Int) -> Byte) : this(*ByteArray(length).apply {
repeat(length) {
this[it] = generator(it)
}
})
fun copyInto(destination: ByteArray, destinationOffset: Int = 0, startIndex: Int = 0, endIndex: Int = size): ByteArray {
System.arraycopy(this.numbers, startIndex, destination, destinationOffset, endIndex - startIndex)
return destination
}
fun copyArray(): ByteArray = ByteArray(numbers.size).also { copyInto(it) }
val size get() = numbers.size
operator fun get(index: Int): Byte = numbers[index]
infix fun contentEquals(other: ImmutableByteArray?) = numbers.contentEquals(other?.numbers)
override fun hashCode() = numbers.contentHashCode()
fun joinToString(separator: CharSequence = ", ", prefix: CharSequence = "", postfix: CharSequence = "", limit: Int = -1, truncated: CharSequence = "...", transform: ((Byte) -> CharSequence)? = null): String {
return numbers.joinTo(StringBuilder(), separator, prefix, postfix, limit, truncated, transform).toString()
}
override fun toString() = "[${joinToString(", ")}]"
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (javaClass != other?.javaClass) return false
other as ImmutableByteArray
if (!numbers.contentEquals(other.numbers)) return false
return true
}
companion object {
@JvmStatic
val EMPTY = ImmutableByteArray()
@JvmStatic
fun from(vararg numbers: Int) = ImmutableByteArray(*numbers.map { it.toByte() }.toByteArray())
}
override fun iterator(): Iterator = object : Iterator {
var index = 0
override fun hasNext() = index < numbers.size
override fun next() = numbers[index.also { index++ }]
}
}