From 3bd17f6768b9130f7aa57fda84abea19cc600877 Mon Sep 17 00:00:00 2001
From: Daniil Ovchinnikov <daniil.ovchinnikov@jetbrains.com>
Date: Tue, 12 Sep 2017 14:47:19 +0200
Subject: [PATCH] [jvm-lang] update JvmSubstitutor API, add
 JvmSubstitutor.getParameters()

---
 .../src/com/intellij/lang/jvm/types/JvmSubstitutor.java  | 5 +++++
 .../src/com/intellij/psi/PsiJvmSubstitutor.java          | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/java/java-psi-api/src/com/intellij/lang/jvm/types/JvmSubstitutor.java b/java/java-psi-api/src/com/intellij/lang/jvm/types/JvmSubstitutor.java
index 73fd43e1da3e..e46d560634a8 100644
--- a/java/java-psi-api/src/com/intellij/lang/jvm/types/JvmSubstitutor.java
+++ b/java/java-psi-api/src/com/intellij/lang/jvm/types/JvmSubstitutor.java
@@ -19,8 +19,13 @@ import com.intellij.lang.jvm.JvmTypeParameter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Collection;
+
 public interface JvmSubstitutor {
 
+  @NotNull
+  Collection<JvmTypeParameter> getTypeParameters();
+
   @Nullable
   JvmType substitute(@NotNull JvmTypeParameter typeParameter);
 }
diff --git a/java/java-psi-api/src/com/intellij/psi/PsiJvmSubstitutor.java b/java/java-psi-api/src/com/intellij/psi/PsiJvmSubstitutor.java
index 6c8f715561f7..a3f4c57a3096 100644
--- a/java/java-psi-api/src/com/intellij/psi/PsiJvmSubstitutor.java
+++ b/java/java-psi-api/src/com/intellij/psi/PsiJvmSubstitutor.java
@@ -19,10 +19,13 @@ import com.intellij.lang.jvm.JvmTypeParameter;
 import com.intellij.lang.jvm.types.JvmSubstitutor;
 import com.intellij.lang.jvm.types.JvmType;
 import com.intellij.openapi.project.Project;
+import com.intellij.util.SmartList;
 import org.jetbrains.annotations.ApiStatus.Experimental;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Collection;
+
 @Experimental
 public class PsiJvmSubstitutor implements JvmSubstitutor {
 
@@ -34,6 +37,12 @@ public class PsiJvmSubstitutor implements JvmSubstitutor {
     mySubstitutor = substitutor;
   }
 
+  @NotNull
+  @Override
+  public Collection<JvmTypeParameter> getTypeParameters() {
+    return new SmartList<>(mySubstitutor.getSubstitutionMap().keySet());
+  }
+
   @Nullable
   @Override
   public JvmType substitute(@NotNull JvmTypeParameter typeParameter) {