revert LUCENE-781 for now

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@499176 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -332,11 +332,6 @@ Bug fixes
     life" due to this, just a possible future problem).  (Chuck
     Williams via Mike McCandless)
 
-33. LUCENE-781: Fixed the NullPointerException in MultiReader.isCurrent()
-    and MultiReader.getVersion(). isCurrent() now returns true only if
-    all its readers are current. getVersion() now throws an
-    UnsupportedOperationException.  (Daniel Naber)
-
 Optimizations
 
   1. LUCENE-586: TermDocs.skipTo() is now more efficient for

src/java/org/apache/lucene/index/MultiReader.java

@@ -263,29 +263,6 @@ public class MultiReader extends IndexReader {
     return fieldSet;
   }
   
-  /**
-   * Returns <code>true</code> if all readers are still up-to-date.
-   * 
-   * @throws IOException
-   */
-  public boolean isCurrent() throws IOException {
-    for (int i = 0; i < subReaders.length; i++) {
-      IndexReader reader = subReaders[i];
-      if (!reader.isCurrent())
-        return false;
-    }
-    return true;
-  }
-
-  /**
-   * Not implemented.
-   * @throws UnsupportedOperationException
-   */
-  public long getVersion() {
-    throw new UnsupportedOperationException("This method is only implemented in " +
-        "IndexReader, not in MultiReader");
-  }
-
 }
 
 class MultiTermEnum extends TermEnum {

src/test/org/apache/lucene/index/TestMultiReader.java

@@ -106,6 +106,7 @@ public class TestMultiReader extends TestCase {
     assertTrue(reader != null);
   }
   
+  /* known to fail, see https://issues.apache.org/jira/browse/LUCENE-781
   public void testIsCurrent() throws IOException {
     RAMDirectory ramDir1=new RAMDirectory();
     addDoc(ramDir1, "test foo", true);
@@ -134,5 +135,6 @@ public class TestMultiReader extends TestCase {
     iw.addDocument(doc);
     iw.close();
   }
+  */
 
 }