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Merge pull request #8 from ngti/release-1.1
Release 1.1
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79 changes: 79 additions & 0 deletions
79
lib-androscope/src/main/java/nl/ngti/androscope/responses/files/SortParams.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package nl.ngti.androscope.responses.files | ||
|
|
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| import java.lang.IllegalArgumentException | ||
| import java.util.Collections | ||
| import kotlin.Comparator | ||
|
|
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| internal data class SortParams( | ||
| private val sortOrder: String?, | ||
| private val sortColumn: String? | ||
| ) { | ||
|
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| val comparator: Comparator<FileSystemEntry> | ||
| get() { | ||
| var result = folderComparator | ||
| sortOrderComparator?.let { | ||
| result = result then it | ||
| } | ||
| return result | ||
| } | ||
|
|
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| private val sortOrderComparator: Comparator<FileSystemEntry>? | ||
| get() = | ||
| sortOrder?.let { order -> | ||
| sortColumn?.let { column -> | ||
| getSortingComparator(order, column) | ||
| } | ||
| } | ||
|
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| companion object { | ||
| val folderComparator: Comparator<FileSystemEntry> | ||
| get() = compare(valueSelector = { | ||
| it.isFolder | ||
| }) { a, b -> | ||
| // Folders should be shown first | ||
| java.lang.Boolean.compare(b, a) | ||
| } | ||
|
|
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| fun getSortingComparator(order: String, column: String): Comparator<FileSystemEntry> { | ||
| val nameComparator = compareStrings(FileSystemEntry::name) | ||
| val mainComparator: Comparator<FileSystemEntry> = when (column) { | ||
| "name" -> nameComparator | ||
| "extension" -> compareStrings(FileSystemEntry::extension) | ||
| "date" -> compareLong(FileSystemEntry::dateAsLong) | ||
| "size" -> compareLong(FileSystemEntry::sizeAsLong) | ||
| else -> throw IllegalArgumentException("Illegal sort column: $column") | ||
| } | ||
| var comparator: Comparator<FileSystemEntry> = if (mainComparator !== nameComparator) { | ||
| mainComparator then nameComparator | ||
| } else { | ||
| mainComparator | ||
| } | ||
| if ("desc" == order) { | ||
| comparator = Collections.reverseOrder(comparator) | ||
| } | ||
| return comparator | ||
| } | ||
|
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| private fun compareStrings(selector: FileSystemEntryValueSelector<String>) = compare(selector) { a, b -> | ||
| a.compareTo(b, ignoreCase = true) | ||
| } | ||
|
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| private fun compareLong(selector: FileSystemEntryValueSelector<Long>) = compare(selector) { a, b -> | ||
| a.compareTo(b) | ||
| } | ||
|
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| private inline fun <T> compare( | ||
| valueSelector: FileSystemEntryValueSelector<T>, | ||
| crossinline compareBlock: (a: T, b: T) -> Int | ||
| ): Comparator<FileSystemEntry> { | ||
| return Comparator { a: FileSystemEntry, b: FileSystemEntry -> | ||
| compareBlock(valueSelector(a), valueSelector(b)) | ||
| } | ||
| } | ||
|
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| private fun interface FileSystemEntryValueSelector<T> { | ||
| operator fun invoke(entry: FileSystemEntry): T | ||
| } | ||
| } | ||
| } |
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