1 files changed, 149 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnBasedSet.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnBasedSet.java
new file mode 100644
index 0000000000..47a582e222
--- /dev/null
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnBasedSet.java
@@ -0,0 +1,149 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.hive.service.cli;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.apache.hive.service.cli.thrift.TColumn;
+import org.apache.hive.service.cli.thrift.TRow;
+import org.apache.hive.service.cli.thrift.TRowSet;
+
+/**
+ * ColumnBasedSet.
+ */
+public class ColumnBasedSet implements RowSet {
+
+  private long startOffset;
+
+  private final Type[] types; // non-null only for writing (server-side)
+  private final List<Column> columns;
+
+  public ColumnBasedSet(TableSchema schema) {
+    types = schema.toTypes();
+    columns = new ArrayList<Column>();
+    for (ColumnDescriptor colDesc : schema.getColumnDescriptors()) {
+      columns.add(new Column(colDesc.getType()));
+    }
+  }
+
+  public ColumnBasedSet(TRowSet tRowSet) {
+    types = null;
+    columns = new ArrayList<Column>();
+    for (TColumn tvalue : tRowSet.getColumns()) {
+      columns.add(new Column(tvalue));
+    }
+    startOffset = tRowSet.getStartRowOffset();
+  }
+
+  private ColumnBasedSet(Type[] types, List<Column> columns, long startOffset) {
+    this.types = types;
+    this.columns = columns;
+    this.startOffset = startOffset;
+  }
+
+  @Override
+  public ColumnBasedSet addRow(Object[] fields) {
+    for (int i = 0; i < fields.length; i++) {
+      columns.get(i).addValue(types[i], fields[i]);
+    }
+    return this;
+  }
+
+  public List<Column> getColumns() {
+    return columns;
+  }
+
+  @Override
+  public int numColumns() {
+    return columns.size();
+  }
+
+  @Override
+  public int numRows() {
+    return columns.isEmpty() ? 0 : columns.get(0).size();
+  }
+
+  @Override
+  public ColumnBasedSet extractSubset(int maxRows) {
+    int numRows = Math.min(numRows(), maxRows);
+
+    List<Column> subset = new ArrayList<Column>();
+    for (int i = 0; i < columns.size(); i++) {
+      subset.add(columns.get(i).extractSubset(0, numRows));
+    }
+    ColumnBasedSet result = new ColumnBasedSet(types, subset, startOffset);
+    startOffset += numRows;
+    return result;
+  }
+
+  @Override
+  public long getStartOffset() {
+    return startOffset;
+  }
+
+  @Override
+  public void setStartOffset(long startOffset) {
+    this.startOffset = startOffset;
+  }
+
+  public TRowSet toTRowSet() {
+    TRowSet tRowSet = new TRowSet(startOffset, new ArrayList<TRow>());
+    for (int i = 0; i < columns.size(); i++) {
+      tRowSet.addToColumns(columns.get(i).toTColumn());
+    }
+    return tRowSet;
+  }
+
+  @Override
+  public Iterator<Object[]> iterator() {
+    return new Iterator<Object[]>() {
+
+      private int index;
+      private final Object[] convey = new Object[numColumns()];
+
+      @Override
+      public boolean hasNext() {
+        return index < numRows();
+      }
+
+      @Override
+      public Object[] next() {
+        for (int i = 0; i < columns.size(); i++) {
+          convey[i] = columns.get(i).get(index);
+        }
+        index++;
+        return convey;
+      }
+
+      @Override
+      public void remove() {
+        throw new UnsupportedOperationException("remove");
+      }
+    };
+  }
+
+  public Object[] fill(int index, Object[] convey) {
+    for (int i = 0; i < columns.size(); i++) {
+      convey[i] = columns.get(i).get(index);
+    }
+    return convey;
+  }
+}