1 files changed, 8 insertions, 4 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java b/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
index ae9ec0369e..ae0c358a1e 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/RuleClass.java
@@ -57,6 +57,7 @@ import com.google.devtools.build.lib.vfs.PathFragment;
 import java.util.ArrayList;
 import java.util.BitSet;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
@@ -422,10 +423,6 @@ public class RuleClass {
         this.ruleClasses = ImmutableSet.copyOf(ruleClasses);
       }
 
-      public RuleClassNamePredicate() {
-        this(ImmutableSet.<String>of());
-      }
-
       @Override
       public boolean apply(RuleClass ruleClass) {
         return ruleClasses.contains(ruleClass.getName());
@@ -442,6 +439,13 @@ public class RuleClass {
             && ruleClasses.equals(((RuleClassNamePredicate) o).ruleClasses);
       }
 
+      /**
+       * Returns true if this and the other predicate have common rule class entries.
+       */
+      public boolean intersects(RuleClassNamePredicate other) {
+        return !Collections.disjoint(ruleClasses, other.ruleClasses);
+      }
+
       @Override
       public String toString() {
         return ruleClasses.isEmpty() ? "nothing" : StringUtil.joinEnglishList(ruleClasses);