Loading SAM adapters with wildcard types.

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/sam/SingleAbstractMethodUtils.java

@@ -137,7 +137,8 @@ public class SingleAbstractMethodUtils {
     private static boolean isSamType(@NotNull JetType type) {
         ClassifierDescriptor classifier = type.getConstructor().getDeclarationDescriptor();
         return classifier instanceof ClassDescriptorFromJvmBytecode &&
-               ((ClassDescriptorFromJvmBytecode) classifier).isSamInterface();
+               ((ClassDescriptorFromJvmBytecode) classifier).isSamInterface() &&
+               getAbstractMembers(type).size() == 1; // Comparator<*> is not a SAM type, because substituted compare() method doesn't exist
     }
 
     public static boolean isSamAdapterNecessary(@NotNull SimpleFunctionDescriptor fun) {

compiler/testData/loadJava/compiledJava/singleAbstractMethod/adapter/NonTrivialFunctionType.java

@@ -9,4 +9,10 @@ public class NonTrivialFunctionType {
 
     public void foo(Comparator<String> comparator) {
     }
+
+    public void wildcardUnbound(Comparator<?> comparator) {
+    }
+
+    public void wildcardBound(Comparator<? super CharSequence> comparator) {
+    }
 }

compiler/testData/loadJava/compiledJava/singleAbstractMethod/adapter/NonTrivialFunctionType.txt

@@ -6,4 +6,7 @@ public open class NonTrivialFunctionType : java.lang.Object {
     public open /*synthesized*/ fun foo(/*0*/ p0 : ((jet.String?, jet.String?) -> jet.Int)?) : jet.Unit
     public open fun foo(/*0*/ p0 : java.io.FilenameFilter?) : jet.Unit
     public open fun foo(/*0*/ p0 : java.util.Comparator<jet.String>?) : jet.Unit
+    public open /*synthesized*/ fun wildcardBound(/*0*/ p0 : ((jet.CharSequence?, jet.CharSequence?) -> jet.Int)?) : jet.Unit
+    public open fun wildcardBound(/*0*/ p0 : java.util.Comparator<in jet.CharSequence?>?) : jet.Unit
+    public open fun wildcardUnbound(/*0*/ p0 : java.util.Comparator<out jet.Any?>?) : jet.Unit
 }