introduce PsiQualifiedExpression

java/openapi/src/com/intellij/psi/PsiQualifiedExpression.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi;
+
+import org.jetbrains.annotations.Nullable;
+
+public interface PsiQualifiedExpression extends PsiExpression {
+  @Nullable
+  PsiJavaCodeReferenceElement getQualifier();
+}

java/openapi/src/com/intellij/psi/PsiSuperExpression.java

@@ -21,7 +21,7 @@ import org.jetbrains.annotations.Nullable;
  * Represents a Java <code>super</code> expression in a super method call. Note that the qualifier of
  * a super constructor call is represented as a {@link PsiKeyword} rather than a <code>PsiSuperExpression</code>.  
  */
-public interface PsiSuperExpression extends PsiExpression {
+public interface PsiSuperExpression extends PsiQualifiedExpression {
   /**
    * Returns the expression representing the class name qualifying the <code>super</code>
    * expression.

java/openapi/src/com/intellij/psi/PsiThisExpression.java

@@ -20,7 +20,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents a Java <code>this</code> expression.
  */
-public interface PsiThisExpression extends PsiExpression {
+public interface PsiThisExpression extends PsiQualifiedExpression {
   /**
    * Returns the expression representing the class name qualifying the <code>this</code>
    * expression.