1 files changed, 113 insertions, 0 deletions
diff --git a/java/com/google/gerrit/lucene/ChangeSubIndex.java b/java/com/google/gerrit/lucene/ChangeSubIndex.java
new file mode 100644
index 0000000000..7d7cbef64f
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+++ b/java/com/google/gerrit/lucene/ChangeSubIndex.java
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+// Copyright (C) 2016 The Android Open Source Project
+//
+// 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.google.gerrit.lucene;
+
+import static com.google.common.collect.Iterables.getOnlyElement;
+import static com.google.gerrit.lucene.LuceneChangeIndex.ID_SORT_FIELD;
+import static com.google.gerrit.lucene.LuceneChangeIndex.UPDATED_SORT_FIELD;
+import static com.google.gerrit.server.index.change.ChangeSchemaDefinitions.NAME;
+
+import com.google.gerrit.index.FieldDef;
+import com.google.gerrit.index.QueryOptions;
+import com.google.gerrit.index.Schema;
+import com.google.gerrit.index.Schema.Values;
+import com.google.gerrit.index.query.DataSource;
+import com.google.gerrit.index.query.FieldBundle;
+import com.google.gerrit.index.query.Predicate;
+import com.google.gerrit.index.query.QueryParseException;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.server.config.SitePaths;
+import com.google.gerrit.server.index.change.ChangeField;
+import com.google.gerrit.server.index.change.ChangeIndex;
+import com.google.gerrit.server.query.change.ChangeData;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.sql.Timestamp;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.NumericDocValuesField;
+import org.apache.lucene.search.SearcherFactory;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.store.FSDirectory;
+
+public class ChangeSubIndex extends AbstractLuceneIndex<Change.Id, ChangeData>
+    implements ChangeIndex {
+  ChangeSubIndex(
+      Schema<ChangeData> schema,
+      SitePaths sitePaths,
+      Path path,
+      GerritIndexWriterConfig writerConfig,
+      SearcherFactory searcherFactory)
+      throws IOException {
+    this(
+        schema,
+        sitePaths,
+        FSDirectory.open(path),
+        path.getFileName().toString(),
+        writerConfig,
+        searcherFactory);
+  }
+
+  ChangeSubIndex(
+      Schema<ChangeData> schema,
+      SitePaths sitePaths,
+      Directory dir,
+      String subIndex,
+      GerritIndexWriterConfig writerConfig,
+      SearcherFactory searcherFactory)
+      throws IOException {
+    super(schema, sitePaths, dir, NAME, subIndex, writerConfig, searcherFactory);
+  }
+
+  @Override
+  public void replace(ChangeData obj) throws IOException {
+    throw new UnsupportedOperationException("don't use ChangeSubIndex directly");
+  }
+
+  @Override
+  public void delete(Change.Id key) throws IOException {
+    throw new UnsupportedOperationException("don't use ChangeSubIndex directly");
+  }
+
+  @Override
+  public DataSource<ChangeData> getSource(Predicate<ChangeData> p, QueryOptions opts)
+      throws QueryParseException {
+    throw new UnsupportedOperationException("don't use ChangeSubIndex directly");
+  }
+
+  // Make method public so that it can be used in LuceneChangeIndex
+  @Override
+  public FieldBundle toFieldBundle(Document doc) {
+    return super.toFieldBundle(doc);
+  }
+
+  @Override
+  void add(Document doc, Values<ChangeData> values) {
+    // Add separate DocValues fields for those fields needed for sorting.
+    FieldDef<ChangeData, ?> f = values.getField();
+    if (f == ChangeField.LEGACY_ID) {
+      int v = (Integer) getOnlyElement(values.getValues());
+      doc.add(new NumericDocValuesField(ID_SORT_FIELD, v));
+    } else if (f == ChangeField.UPDATED) {
+      long t = ((Timestamp) getOnlyElement(values.getValues())).getTime();
+      doc.add(new NumericDocValuesField(UPDATED_SORT_FIELD, t));
+    }
+    super.add(doc, values);
+  }
+
+  @Override
+  protected ChangeData fromDocument(Document doc) {
+    throw new UnsupportedOperationException("don't use ChangeSubIndex directly");
+  }
+}