IDEA-COMMUNITY-CR-2175 (explicit archive handler cleanup)

platform/core-api/src/com/intellij/openapi/vfs/impl/ArchiveHandler.java

@@ -92,6 +92,10 @@ public abstract class ArchiveHandler {
     return ArrayUtil.toStringArray(names);
   }
 
+  public void dispose() {
+    myEntries.clear();
+  }
+
   @Nullable
   protected EntryInfo getEntryInfo(@NotNull String relativePath) {
     return getEntriesMap().get(relativePath);

platform/core-impl/src/com/intellij/openapi/vfs/impl/ZipHandler.java

@@ -119,7 +119,9 @@ public class ZipHandler extends ArchiveHandler {
     return getFile();
   }
 
-  public void dispose() { // todo it would be nice to dispose ZipHandler
+  @Override
+  public void dispose() {
+    super.dispose();
     ourZipFileFileAccessorCache.remove(this);
   }
 

platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/VfsImplUtil.java

@@ -302,6 +302,7 @@ public class VfsImplUtil {
     static InvalidationState invalidate(@Nullable InvalidationState state, final String path) {
       Pair<ArchiveFileSystem, ArchiveHandler> handlerPair = ourHandlers.remove(path);
       if (handlerPair != null) {
+        handlerPair.second.dispose();
         forEachDirectoryComponent(path, new Consumer<String>() {
           @Override
           public void consume(String containingDirectoryPath) {