1 files changed, 119 insertions, 0 deletions
diff --git a/java/java-impl/src/com/intellij/psi/RefQueueIndex.java b/java/java-impl/src/com/intellij/psi/RefQueueIndex.java
new file mode 100644
index 000000000000..d65fa4473c2f
--- /dev/null
+++ b/java/java-impl/src/com/intellij/psi/RefQueueIndex.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.impl.file.impl.ResolveScopeManagerImpl;
+import com.intellij.util.indexing.*;
+import com.intellij.util.io.DataExternalizer;
+import com.intellij.util.io.KeyDescriptor;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.util.Collections;
+import java.util.Map;
+
+// all it does is take files it was fed and queue them to the resolve
+public class RefQueueIndex extends FileBasedIndexExtension<Void,Void> {
+  private static final ID<Void, Void> ID = com.intellij.util.indexing.ID.create("RefQueueIndex");
+
+  @NotNull
+  @Override
+  public ID<Void, Void> getName() {
+    return ID;
+  }
+
+  @NotNull
+  @Override
+  public DataIndexer<Void, Void, FileContent> getIndexer() {
+    return new DataIndexer<Void, Void, FileContent>() {
+      @NotNull
+      @Override
+      public Map<Void, Void> map(@NotNull FileContent inputData) {
+        if (ResolveScopeManagerImpl.ENABLED_REF_BACK) {
+          Project project = inputData.getProject();
+          RefResolveService.getInstance(project).queue(Collections.singletonList(inputData.getFile()), "Cache updater");
+        }
+        return Collections.emptyMap();
+      }
+    };
+  }
+
+  @NotNull
+  @Override
+  public KeyDescriptor<Void> getKeyDescriptor() {
+    return new KeyDescriptor<Void>() {
+      @Override
+      public void save(@NotNull DataOutput out, Void value) {
+
+      }
+
+      @Override
+      public Void read(@NotNull DataInput in) {
+        return null;
+      }
+
+      @Override
+      public int getHashCode(Void value) {
+        return 0;
+      }
+
+      @Override
+      public boolean isEqual(Void val1, Void val2) {
+        return false;
+      }
+    };
+  }
+
+  @NotNull
+  @Override
+  public DataExternalizer<Void> getValueExternalizer() {
+    return new DataExternalizer<Void>() {
+      @Override
+      public void save(@NotNull DataOutput out, Void value) {
+
+      }
+
+      @Override
+      public Void read(@NotNull DataInput in) {
+        return null;
+      }
+    };
+  }
+
+  @NotNull
+  @Override
+  public FileBasedIndex.InputFilter getInputFilter() {
+    return new FileBasedIndex.InputFilter() {
+      @Override
+      public boolean acceptInput(@NotNull VirtualFile file) {
+        return !file.isDirectory();
+      }
+    };
+  }
+
+  @Override
+  public boolean dependsOnFileContent() {
+    return true;
+  }
+
+  @Override
+  public int getVersion() {
+    return 0;
+  }
+}