moved to Kotlin multiplatform

Jenkinsfile

@@ -7,8 +7,8 @@ pipeline {
         stage("Build") {
             steps {
                 sh "./gradlew clean build"
-                junit testResults: "build/test-results/test/*.xml"
-                archiveArtifacts artifacts: 'build/libs/*.jar,benchmark/build/libs/*.jar',
+                junit testResults: "build/test-results/*Test/*.xml"
+                archiveArtifacts artifacts: 'build/libs/*.jar,build/libs/*.klib,benchmark/build/distributions/*.jar',
                                  allowEmptyArchive: true,
                                  fingerprint: true,
                                  onlyIfSuccessful: true

benchmark/build.gradle

@@ -1,13 +1,27 @@
 plugins {
-    alias catalog.plugins.kotlin.jvm
-    alias catalog.plugins.envelope
+    alias catalog.plugins.kotlin.multiplatform
+    alias catalog.plugins.envelope apply false
+}
+
+import net.woggioni.gradle.envelope.EnvelopeJarTask
+
+kotlin {
+    jvm()
 }
 
 dependencies {
-    implementation catalog.jwo
-    implementation(rootProject)
+    jvmMainImplementation catalog.jwo
+    jvmMainImplementation(rootProject)
 }
 
-envelopeJar {
+Provider<EnvelopeJarTask> envelopeJarTaskProvider = project.tasks.register("envelopeJar", EnvelopeJarTask.class) {
+    group = BasePlugin.BUILD_GROUP
+    description = "Package the application in a single executable jar file"
+    includeLibraries(project.configurations.named("jvmRuntimeClasspath"))
+    includeLibraries(project.getTasks().named("jvmJar", Jar.class))
     mainClass = "net.woggioni.klevtree.benchmark.BenchmarkKt"
 }
+
+project.tasks.named(BasePlugin.ASSEMBLE_TASK_NAME, DefaultTask.class) {
+    dependsOn(envelopeJarTaskProvider)
+}

build.gradle

@@ -1,9 +1,10 @@
 plugins {
     id 'maven-publish'
-    alias catalog.plugins.kotlin.jvm
-    alias catalog.plugins.multi.release.jar
+    alias catalog.plugins.kotlin.multiplatform
 }
 
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
 
 allprojects {
     group = "net.woggioni"
@@ -17,34 +18,41 @@ allprojects {
     }
 }
 
-ext {
-    setProperty('jpms.module.name', 'net.woggioni.klevtree')
-}
-
-dependencies {
-    implementation catalog.jwo
-
-    testImplementation catalog.junit.jupiter.api
-    testImplementation catalog.junit.jupiter.params
-    testRuntimeOnly catalog.junit.jupiter.engine
-    testRuntimeOnly catalog.log4j.slf4j.impl
-}
-
-compileJava {
-    options.release = 8
-    options.compilerArgs << '-parameters'
-}
-
-compileKotlin {
-    kotlinOptions.with {
-        jvmTarget = '1.8'
+kotlin {
+    sourceSets {
+        commonTest {
+            dependencies {
+                implementation group: 'org.jetbrains.kotlin',
+                        name: 'kotlin-test',
+                        version: catalog.versions.kotlin.get()
+            }
+        }
+    }
+    jvm {
+        jvmToolchain(17)
+        withJava()
+        compilations.main {
+            Action<KotlinJvmCompilerOptions> action = { KotlinJvmCompilerOptions kjco ->
+                kjco.javaParameters = true
+                kjco.jvmTarget = JvmTarget.JVM_1_8
+                kjco.moduleName = "net.woggioni.klevtree"
+            }
+            compilerOptions.configure(action)
+        }
+    }
+    linuxX64()
+    js(IR) {
+        nodejs()
     }
 }
 
-test {
-    useJUnitPlatform()
+compileJava {
+    options.release = 11
+    String patchString = 'net.woggioni.klevtree=' + kotlin.targets.jvm.compilations.main.output.classesDirs.asPath
+    options.compilerArgs << '--patch-module' << patchString
 }
 
+
 publishing {
     repositories {
         maven {
@@ -53,7 +61,7 @@ publishing {
     }
     publications {
         maven(MavenPublication) {
-            from(components["java"])
+            from(components.kotlin)
         }
     }
 }

gradle.properties

@@ -1,6 +1,7 @@
 kotlin.code.style=official
+kotlin.jvm.target.validation.mode=ignore
 
 woggioniMavenRepositoryUrl=https://woggioni.net/mvn/
 
 klevtree.version = 2023.03
-lys.version = 2023.05
+lys.version = 2023.05.20

src/commonMain/kotlin/net.woggioni.klevtree/DistanceCalculator.kt

@@ -1,12 +1,14 @@
 package net.woggioni.klevtree
 
-import net.woggioni.jwo.TreeNodeVisitor
+import net.woggioni.klevtree.tree.TreeNodeVisitor
+import kotlin.math.min
+
 
 sealed class DistanceCalculator {
     abstract fun compute(keyChecker : Trie.Keychecker<Char>,
-                stack: List<TreeNodeVisitor.StackContext<LevNode, Unit>>,
-                wordkey: String,
-                worstCase : Int) : TreeNodeVisitor.VisitOutcome
+                         stack: List<TreeNodeVisitor.StackContext<LevNode, Unit>>,
+                         wordkey: String,
+                         worstCase : Int) : TreeNodeVisitor.VisitOutcome
 
     object LevenshteinDistanceCalculator : DistanceCalculator() {
         override fun compute(keyChecker : Trie.Keychecker<Char>,
@@ -21,7 +23,7 @@ sealed class DistanceCalculator {
                 if(keyChecker.check(wordkey[i - 1], currentStackElement.node.key)) {
                     currentRow[i] = previousRow[i - 1]
                 } else {
-                    currentRow[i] = Math.min(Math.min(currentRow[i - 1], previousRow[i -1]), previousRow[i]) + 1
+                    currentRow[i] = min(min(currentRow[i - 1], previousRow[i -1]), previousRow[i]) + 1
                 }
             }
             return if(worstCase >= 0 && worstCase <= currentRow.minOrNull()!!) {
@@ -45,13 +47,13 @@ sealed class DistanceCalculator {
                 if (keyChecker.check(wordkey[i - 1], cse.node.key)) {
                     crow[i] = prow[i - 1]
                 } else {
-                    crow[i] = Math.min(Math.min(crow[i - 1], prow[i - 1]), prow[i]) + 1
+                    crow[i] = min(min(crow[i - 1], prow[i - 1]), prow[i]) + 1
                 }
                 if (stack.size > 2 && i > 1 && keyChecker.check(wordkey[i - 2], cse.node.key)
                     && keyChecker.check(wordkey[i - 1], pse.node.key)) {
                     val ppse = stack[stack.size - 3]
                     val pprow: IntArray = ppse.node.payload!!
-                    crow[i] = Math.min(crow[i], pprow[i - 2] + 1)
+                    crow[i] = min(crow[i], pprow[i - 2] + 1)
                 }
             }
             return if(worstCase >= 0 && worstCase <= prow.minOrNull()!!) {

src/commonMain/kotlin/net.woggioni.klevtree/LevTrie.kt

@@ -1,9 +1,9 @@
 package net.woggioni.klevtree
 
-import net.woggioni.jwo.TreeNodeVisitor
-import net.woggioni.jwo.TreeWalker
 import net.woggioni.klevtree.node.CharNode
 import net.woggioni.klevtree.node.TrieNode
+import net.woggioni.klevtree.tree.TreeNodeVisitor
+import net.woggioni.klevtree.tree.TreeWalker
 
 internal typealias LevNode = TrieNode<Char, IntArray>
 
@@ -41,7 +41,8 @@ class LevTrie : CharTrie<IntArray>() {
         }
 
     fun fuzzySearch(word : String, maxResult: Int) : List<Pair<String, Int>> {
-        val result = sortedSetOf<Pair<String, Int>>(compareBy({ it.second }, { it.first }))
+        val comparator : Comparator<Pair<String, Int>> = compareBy({ it.second }, { it.first })
+        val result = mutableListOf<Pair<String, Int>>()
         val requiredSize = word.length + 1
         val visitor = object: TreeNodeVisitor<LevNode, Unit> {
             override fun visitPre(stack: List<TreeNodeVisitor.StackContext<LevNode, Unit>>): TreeNodeVisitor.VisitOutcome {
@@ -64,6 +65,7 @@ class LevTrie : CharTrie<IntArray>() {
                         val candidate = sb.toString()
                         val distance = stack[stack.size - 2].node.payload!![word.length]
                         result.add(candidate to distance)
+                        result.sortWith(comparator)
                         if(result.size > maxResult) {
                             result.remove(result.last())
                         }

src/commonMain/kotlin/net.woggioni.klevtree/Trie.kt

@@ -1,8 +1,8 @@
 package net.woggioni.klevtree
 
-import net.woggioni.jwo.TreeNodeVisitor
-import net.woggioni.jwo.TreeWalker
 import net.woggioni.klevtree.node.TrieNode
+import net.woggioni.klevtree.tree.TreeNodeVisitor
+import net.woggioni.klevtree.tree.TreeWalker
 
 abstract class Trie<T : TrieNode<KEY, PAYLOAD>, KEY, PAYLOAD> {
 

src/commonMain/kotlin/net.woggioni.klevtree/node/nodes.kt

@@ -1,6 +1,6 @@
 package net.woggioni.klevtree.node
 
-import net.woggioni.jwo.TreeNodeVisitor
+import net.woggioni.klevtree.tree.TreeNodeVisitor
 
 
 open class TrieNode<T, PAYLOAD>(val key : T?) : TreeNodeVisitor.TreeNode<TrieNode<T, PAYLOAD>> {

src/commonMain/kotlin/net.woggioni.klevtree/tree/TreeNodeVisitor.kt

@@ -0,0 +1,64 @@
+package net.woggioni.klevtree.tree
+
+/**
+ * This interface must be implemented by the user of [TreeWalker] and its methods will be called by
+ * [TreeWalker.walk]. The methods will receive as an input a list of [StackContext]
+ * instances each one correspond to a node in the tree, each node is preceded in the list
+ * by its parents in the tree. Each instance has a method, [StackContext.context]
+ * to set a custom object that can be used in the [.visitPre] method and the method
+ * [StackContext.context] that can be used in the [.visitPost] method to retrieve
+ * the same instance. This is to provide support for algorithms that require both pre-order and post-order logic.
+ * The last element of the list corresponds to the node currently being traversed.
+ * @param <T> the type of the context object used
+</T> */
+interface TreeNodeVisitor<NODE : TreeNodeVisitor.TreeNode<NODE>, T> {
+    interface TreeNode<NODE : TreeNode<NODE>> {
+        fun children(): Iterator<NODE>?
+    }
+
+    /**
+     * This interface exposes the methods that are visible to the user of
+     * [TreeWalker], it allows to
+     * set/get a custom object in the current stack context or to get the current link's Aci
+     * @param <T> the type of the context object used
+    </T> */
+    interface StackContext<NODE : TreeNode<*>?, T> {
+        /**
+         * @return the current user object
+         */
+        /**
+         * @param ctx the user object to set for this stack level
+         */
+        var context: T?
+
+        /**
+         * @return the current TreeNode
+         */
+        val node: NODE
+    }
+
+    enum class VisitOutcome {
+        CONTINUE,
+        SKIP,
+        EARLY_EXIT
+    }
+
+    /**
+     * This method will be called for each link using
+     * [a Depth-first pre-oder algorithm](https://en.wikipedia.org/wiki/Tree_traversal#Pre-order_(NLR))
+     * @param stack is a list of [StackContext] instances corresponding to the full path from the root to the
+     * current node in the tree
+     * @return a boolean that will be used to decide whether to traverse the subtree rooted in the current link or not
+     */
+    fun visitPre(stack: List<StackContext<NODE, T>>): VisitOutcome {
+        return VisitOutcome.CONTINUE
+    }
+
+    /**
+     * This method will be called for each node using
+     * [a Depth-first post-oder algorithm](https://en.wikipedia.org/wiki/Tree_traversal#Post-order_(LRN))
+     * @param stack is a list of [StackContext] instances corresponding to the full path from the root to the
+     * current node in the tree
+     */
+    fun visitPost(stack: List<StackContext<NODE, T>>) {}
+}

src/commonMain/kotlin/net.woggioni.klevtree/tree/TreeWalker.kt

@@ -0,0 +1,48 @@
+package net.woggioni.klevtree.tree
+
+
+class TreeWalker<NODE : TreeNodeVisitor.TreeNode<NODE>, T>(
+    private val visitor: TreeNodeVisitor<NODE, T>
+) {
+
+    private class StackElement<NODE : TreeNodeVisitor.TreeNode<NODE>, T>(override val node: NODE) :
+        TreeNodeVisitor.StackContext<NODE, T> {
+        override var context: T? = null
+        var childrenIterator: Iterator<NODE>? = null
+    }
+
+    /**
+     * This methods does the actual job of traversing the tree calling the methods of the provided
+     * [TreeNodeVisitor] instance
+     * @param root the root node of the tree
+     */
+    fun walk(root: NODE) {
+        val stack: MutableList<StackElement<NODE, T>> = mutableListOf()
+        val rootStackElement = StackElement<NODE, T>(root)
+        stack.add(rootStackElement)
+        val publicStack: List<TreeNodeVisitor.StackContext<NODE, T>> = stack
+        when (visitor.visitPre(publicStack)) {
+            TreeNodeVisitor.VisitOutcome.CONTINUE -> rootStackElement.childrenIterator = root.children()
+            TreeNodeVisitor.VisitOutcome.SKIP -> rootStackElement.childrenIterator = null
+            TreeNodeVisitor.VisitOutcome.EARLY_EXIT -> return
+        }
+        while (stack.isNotEmpty()) {
+            val lastElement: StackElement<NODE, T> = stack.last()
+            val childrenIterator = lastElement.childrenIterator
+            if (childrenIterator != null && childrenIterator.hasNext()) {
+                val childNode = childrenIterator.next()
+                val childStackElement = StackElement<NODE, T>(childNode)
+                stack.add(childStackElement)
+                when (visitor.visitPre(publicStack)) {
+                    TreeNodeVisitor.VisitOutcome.CONTINUE -> childStackElement.childrenIterator = childNode.children()
+                    TreeNodeVisitor.VisitOutcome.SKIP -> childStackElement.childrenIterator = null
+                    TreeNodeVisitor.VisitOutcome.EARLY_EXIT -> return
+                }
+            } else {
+                visitor.visitPost(publicStack)
+                stack.removeLast()
+            }
+        }
+    }
+}
+

src/commonTest/kotlin/net/woggioni/klevtree/LevtreeTest.kt

@@ -1,7 +1,11 @@
 package net.woggioni.klevtree
 
-import org.junit.jupiter.api.Assertions
-import org.junit.jupiter.api.Test
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+
 
 class LevtreeTest {
 
@@ -13,23 +17,23 @@ class LevtreeTest {
         val word = "dailies"
         run {
             val pair = tree.add(word)
-            Assertions.assertTrue(pair.first)
+            assertTrue(pair.first)
             val node = tree.search(word)
-            Assertions.assertNotNull(node)
-            Assertions.assertEquals(
+            assertNotNull(node)
+            assertEquals(
                 word,
-                node!!.linealDescendant().fold(StringBuilder(), StringBuilder::append).toString()
+                node.linealDescendant().fold(StringBuilder(), StringBuilder::append).toString()
             )
             val result = tree.fuzzySearch(word, 5)
-            Assertions.assertEquals(1, result.size)
-            Assertions.assertEquals(word to 0, result[0])
+            assertEquals(1, result.size)
+            assertEquals(word to 0, result[0])
         }
         run {
             tree.remove(word)
             val node = tree.search(word)
-            Assertions.assertNull(node)
+            assertNull(node)
             val result = tree.fuzzySearch(word, 5)
-            Assertions.assertEquals(0, result.size)
+            assertEquals(0, result.size)
         }
     }
 
@@ -63,21 +67,21 @@ class LevtreeTest {
         run {
             val word = "fired"
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("tired" to 1, result[0])
+            assertEquals(4, result.size)
+            assertEquals("tired" to 1, result[0])
         }
         run {
             val word = "tierd"
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("tired" to 2, result[0])
+            assertEquals(4, result.size)
+            assertEquals("tired" to 2, result[0])
         }
         run {
             val word = "tierd"
             tree.remove("tired")
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("trail" to 4, result[0])
+            assertEquals(4, result.size)
+            assertEquals("trail" to 4, result[0])
         }
     }
 
@@ -89,22 +93,22 @@ class LevtreeTest {
         run {
             val word = "fired"
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("tired" to 1, result[0])
+            assertEquals(4, result.size)
+            assertEquals("tired" to 1, result[0])
         }
         run {
             val word = "capitvate"
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("captivate" to 1, result[0])
-            Assertions.assertEquals("captivity" to 3, result[1])
+            assertEquals(4, result.size)
+            assertEquals("captivate" to 1, result[0])
+            assertEquals("captivity" to 3, result[1])
         }
         run {
             tree.remove("captivate")
             val word = "capitvate"
             val result = tree.fuzzySearch(word, 4)
-            Assertions.assertEquals(4, result.size)
-            Assertions.assertEquals("captivity" to 3, result[0])
+            assertEquals(4, result.size)
+            assertEquals("captivity" to 3, result[0])
         }
     }
 }

src/jvmMain/java/module-info.java

@@ -1,4 +1,4 @@
 module net.woggioni.klevtree {
-    requires net.woggioni.jwo;
+    requires kotlin.stdlib;
     exports net.woggioni.klevtree;
 }

src/test/resources/log4j2.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Configuration status="WARN">
-    <Appenders>
-        <Console name="Console" target="SYSTEM_ERR">
-            <PatternLayout pattern="%d{HH:mm:ss,SSS} %highlight{[%p]} (%t) %c: %m%n"/>
-            <Filters>
-                <ThresholdFilter level="ERROR" onMatch="ACCEPT" />
-            </Filters>
-        </Console>
-    </Appenders>
-
-    <Loggers>
-        <Root level="ALL">
-            <AppenderRef ref="Console"/>
-        </Root>
-    </Loggers>
-</Configuration>