35 lines
1.1 KiB
Kotlin
35 lines
1.1 KiB
Kotlin
package cash.z.ecc.android.sdk.demoapp.preference.model.entry
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/**
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* Defines a preference key.
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*
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* Different preference providers may have unique restrictions on keys. This attempts to
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* find a least common denominator with some reasonable limits on what the keys can contain.
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*/
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@JvmInline
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value class Key(val key: String) {
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init {
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requireKeyConstraints(key)
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}
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companion object {
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private const val MIN_KEY_LENGTH = 1
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private const val MAX_KEY_LENGTH = 256
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private val REGEX = Regex("[a-zA-Z0-9_]*") // $NON-NLS
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/**
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* Checks a preference key against known constraints.
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*
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* @param key Key to check.
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*/
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private fun requireKeyConstraints(key: String) {
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require(key.length in 1..MAX_KEY_LENGTH) {
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"Invalid key $key. Length (${key.length}) should be [$MIN_KEY_LENGTH, $MAX_KEY_LENGTH]." // $NON-NLS
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}
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require(REGEX.matches(key)) { "Invalid key $key. Key must contain only letter and numbers." } // $NON-NLS
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}
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}
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}
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