From a2287326ad947a5cc5b544da04ffaaf1c80da238 Mon Sep 17 00:00:00 2001
From: Eugene Zhuravlev <jeka@intellij.com>
Date: Fri, 29 Apr 2011 12:42:25 +0200
Subject: [PATCH] assertions added

---
 .../intellij/util/indexing/FileBasedIndex.java   | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
index 3e8da841c78e..f41adec1079f 100644
--- a/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
+++ b/platform/lang-impl/src/com/intellij/util/indexing/FileBasedIndex.java
@@ -379,7 +379,11 @@ public class FileBasedIndex implements ApplicationComponent {
         final MapIndexStorage<K, V> storage = new MapIndexStorage<K, V>(IndexInfrastructure.getStorageFile(name), extension.getKeyDescriptor(), extension.getValueExternalizer(), extension.getCacheSize());
         final MemoryIndexStorage<K, V> memStorage = new MemoryIndexStorage<K, V>(storage);
         final UpdatableIndex<K, V, FileContent> index = createIndex(name, extension, memStorage);
-        myIndices.put(name, new Pair<UpdatableIndex<?,?, FileContent>, InputFilter>(index, new IndexableFilesFilter(extension.getInputFilter())));
+        final InputFilter inputFilter = extension.getInputFilter();
+        
+        assert inputFilter != null : "Index extension " + name + " must provide non-null input filter";
+        
+        myIndices.put(name, new Pair<UpdatableIndex<?,?, FileContent>, InputFilter>(index, new IndexableFilesFilter(inputFilter)));
         myUnsavedDataIndexingSemaphores.put(name, new Semaphore());
         myNoLimitCheckTypes.addAll(extension.getFileTypesWithSizeLimitNotApplicable());
         break;
@@ -1289,13 +1293,19 @@ public class FileBasedIndex implements ApplicationComponent {
 
   private <K, V> UpdatableIndex<K, V, FileContent> getIndex(ID<K, V> indexId) {
     final Pair<UpdatableIndex<?, ?, FileContent>, InputFilter> pair = myIndices.get(indexId);
+    
+    assert pair != null : "Index data is absent for index " + indexId;
+
     //noinspection unchecked
-    return pair != null? (UpdatableIndex<K,V, FileContent>)pair.getFirst() : null;
+    return (UpdatableIndex<K,V, FileContent>)pair.getFirst();
   }
 
   private InputFilter getInputFilter(ID<?, ?> indexId) {
     final Pair<UpdatableIndex<?, ?, FileContent>, InputFilter> pair = myIndices.get(indexId);
-    return pair != null? pair.getSecond() : null;
+    
+    assert pair != null : "Index data is absent for index " + indexId;
+
+    return pair.getSecond();
   }
 
   public int getNumberOfPendingInvalidations() {