LUCENE-970: FilterIndexReader now implements isOptimized().

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@561162 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -54,6 +54,9 @@ Bug fixes
     in case the index has multiple segments. The public MultiReader 
     now extends MultiSegmentReader and is intended to be used by users
     who want to add their own subreaders. (Daniel Naber, Michael Busch)
+
+ 8. LUCENE-970: FilterIndexReader now implements isOptimized(). Before
+    a call of isOptimized() would throw a NPE. (Michael Busch)
       
 New features
 

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

@@ -217,4 +217,9 @@ public class FilterIndexReader extends IndexReader {
     ensureOpen();
     return in.isCurrent();
   }
+  
+  public boolean isOptimized() {
+    ensureOpen();
+    return in.isOptimized();
+  }
 }

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

@@ -112,6 +112,8 @@ public class TestFilterIndexReader extends TestCase {
 
     IndexReader reader = new TestReader(IndexReader.open(directory));
 
+    assertTrue(reader.isOptimized());
+    
     TermEnum terms = reader.terms();
     while (terms.next()) {
       assertTrue(terms.term().text().indexOf('e') != -1);