Rewrite in Kotlin

Author: hanslovsky

src/main/java/org/scijava/plugins/scripting/kotlin/KotlinScriptLanguage.java

@@ -0,0 +1,113 @@
+/*
+ * #%L
+ * JSR-223-compliant Kotlin scripting language plugin.
+ * %%
+ * Copyright (C) 2016 - 2019 Board of Regents of the University of
+ * Wisconsin-Madison.
+ * %%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+package org.scijava.plugins.scripting.kotlin
+
+import org.scijava.plugins.scripting.kotlin.KotlinScriptLanguage.MyScriptEngineFactory
+import org.jetbrains.kotlin.cli.common.repl.KotlinJsr223JvmScriptEngineFactoryBase
+import org.scijava.plugin.Plugin
+import org.scijava.plugins.scripting.kotlin.KotlinScriptLanguage.SynchronizedScriptEngine
+import org.scijava.script.AdaptedScriptLanguage
+import org.scijava.script.ScriptLanguage
+import java.io.Reader
+import java.util.*
+import javax.script.*
+
+/**
+ * A SciJava [ScriptLanguage] for Kotlin.
+ *
+ * @author Curtis Rueden
+ * @see ScriptEngine
+ */
+@Plugin(type = ScriptLanguage::class, name = "Kotlin")
+class KotlinScriptLanguage : AdaptedScriptLanguage(MyScriptEngineFactory()) {
+    // NB: The wrapped ScriptEngineFactory does not include Kotlin in its list.
+    override fun getNames() = listOf("kotlin", "Kotlin")
+
+    // NB: The wrapped ScriptEngineFactory does not include .kt in its list.
+    override fun getExtensions() = listOf("kt", "kts")
+
+    class MyScriptEngineFactory : KotlinJsr223JvmScriptEngineFactoryBase() {
+        override fun getScriptEngine(): ScriptEngine {
+            return SynchronizedScriptEngine(ScriptEngineManager().getEngineByExtension("kts"))
+        }
+    }
+
+    class SynchronizedScriptEngine(private val delegate: ScriptEngine) : ScriptEngine {
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(s: String, scriptContext: ScriptContext): Any? = delegate.eval(s, scriptContext)
+
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(reader: Reader, scriptContext: ScriptContext): Any? = delegate.eval(reader, scriptContext)
+
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(s: String): Any? = delegate.eval(s)
+
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(reader: Reader): Any? = delegate.eval(reader)
+
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(s: String, bindings: Bindings): Any? = delegate.eval(s, bindings)
+
+        @Synchronized
+        @Throws(ScriptException::class)
+        override fun eval(reader: Reader, bindings: Bindings): Any? = delegate.eval(reader, bindings)
+
+        @Synchronized
+        override fun put(s: String, o: Any) = delegate.put(s, o)
+
+        @Synchronized
+        override fun get(s: String): Any? = delegate[s]
+
+        @Synchronized
+        override fun getBindings(i: Int): Bindings? = delegate.getBindings(i)
+
+        @Synchronized
+        override fun setBindings(bindings: Bindings, i: Int) = delegate.setBindings(bindings, i)
+
+        @Synchronized
+        override fun createBindings(): Bindings = delegate.createBindings()
+
+        @Synchronized
+        override fun getContext(): ScriptContext = delegate.context
+
+        @Synchronized
+        override fun setContext(scriptContext: ScriptContext) {
+            delegate.context = scriptContext
+        }
+
+        @Synchronized
+        override fun getFactory(): ScriptEngineFactory = delegate.factory
+    }
+}