--- /dev/null
+package org.simantics.scl.compiler.constants.generic;
+
+import java.util.ArrayList;
+
+import org.cojen.classfile.TypeDesc;
+import org.objectweb.asm.Label;
+import org.simantics.scl.compiler.internal.codegen.utils.Constants;
+import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
+
+public enum ConvertToListFilter implements OutputFilter {
+ INSTANCE;
+
+ private static final TypeDesc ARRAY_LIST = TypeDesc.forClass(ArrayList.class);
+ private static final TypeDesc[] CONVERSION_PARAMS =
+ new TypeDesc[] {Constants.COLLECTION};
+
+ @Override
+ public void filter(MethodBuilder mb) {
+ Label conversionNeeded = mb.createLabel();
+ Label endFilter = mb.createLabel();
+
+ mb.dup();
+ mb.instanceOf(Constants.LIST);
+ mb.ifZeroComparisonBranch(conversionNeeded, "==");
+
+ // no conversion needed
+ mb.checkCast(Constants.LIST);
+ mb.branch(endFilter);
+
+ // conversion needed
+ mb.setLocation(conversionNeeded);
+
+ mb.newObject(ARRAY_LIST);
+ mb.dupX1();
+ mb.swap();
+ mb.invokeConstructor(ARRAY_LIST, CONVERSION_PARAMS);
+
+ // end
+ mb.setLocation(endFilter);
+ }
+
+}