Fixed: Internal ServiceConfigurationError when Script Engine is created #8

Author: jpsacha

src/main/java/org/scijava/plugins/scripting/scala/ScalaScriptLanguage.java

@@ -6,13 +6,13 @@
  * %%
  * 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
@@ -29,17 +29,17 @@
 
 package org.scijava.plugins.scripting.scala;
 
-import javax.script.ScriptEngine;
-
 import org.scijava.log.LogService;
 import org.scijava.plugin.Parameter;
 import org.scijava.plugin.Plugin;
 import org.scijava.script.AdaptedScriptLanguage;
 import org.scijava.script.ScriptLanguage;
 
+import javax.script.ScriptEngine;
+
 /**
  * An adapter of the Scala interpreter to the SciJava scripting interface.
- * 
+ *
  * @author Curtis Rueden
  * @author Keith Schulze
  * @author Johannes Schindelin
@@ -49,16 +49,10 @@
 @Plugin(type = ScriptLanguage.class, name = "Scala")
 public class ScalaScriptLanguage extends AdaptedScriptLanguage {
 
-	@Parameter
-	private LogService log;
-
-	public ScalaScriptLanguage() {
-		super("scala");
-	}
+    @Parameter
+    private LogService log;
 
-	@Override
-	public ScriptEngine getScriptEngine() {
-		final ScriptEngine eng = new dotty.tools.repl.ScriptEngine();
-		return new ScalaAdaptedScriptEngine(eng);
-	}
+    public ScalaScriptLanguage() {
+        super(new ScalaAdaptedScriptEngineFactory());
+    }
 }

src/main/scala/org/scijava/plugins/scripting/scala/ScalaAdaptedScriptEngineFactory.scala

@@ -0,0 +1,66 @@
+/*
+ * #%L
+ * JSR-223-compliant Scala scripting language plugin.
+ * %%
+ * Copyright (C) 2013 - 2023 SciJava developers.
+ * %%
+ * 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.scala
+
+import org.scijava.plugins.scripting.scala.ScalaAdaptedScriptEngine
+
+import java.util
+import javax.script.{ScriptEngine, ScriptEngineFactory}
+
+/**
+ * A factory for ScalaAdaptedScriptEngine.
+ *
+ * @author Jarek Sacha
+ * @see ScriptEngineFactory
+ */
+class ScalaAdaptedScriptEngineFactory extends ScriptEngineFactory:
+
+  private val factory = new dotty.tools.repl.ScriptEngine.Factory
+
+  /**
+   * Returns an instance of the `ScalaAdaptedScriptEngine`.
+   * A new instance is returned.
+   *
+   * @return A new `ScalaAdaptedScriptEngine` instance.
+   */
+  override def getScriptEngine = new ScalaAdaptedScriptEngine(factory.getScriptEngine)
+
+  override def getEngineName: String                         = factory.getEngineName
+  override def getEngineVersion: String                      = factory.getEngineVersion
+  override def getExtensions: util.List[String]              = factory.getExtensions
+  override def getLanguageName: String                       = factory.getLanguageName
+  override def getLanguageVersion: String                    = factory.getLanguageVersion
+  override def getMimeTypes: util.List[String]               = factory.getMimeTypes
+  override def getNames: util.List[String]                   = factory.getNames
+  override def getOutputStatement(toDisplay: String): String = factory.getOutputStatement(toDisplay)
+  override def getParameter(key: String): AnyRef             = factory.getParameter(key)
+  override def getMethodCallSyntax(obj: String, m: String, args: String*): String =
+    factory.getMethodCallSyntax(obj, m, args*)
+  override def getProgram(statements: String*): String = factory.getProgram(statements*)