import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / adapter / jdbc / src / main / java / org / apache / arrow / adapter / jdbc / consumer / BigIntConsumer.java

diff --git a/ceph/src/arrow/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/consumer/BigIntConsumer.java b/ceph/src/arrow/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/consumer/BigIntConsumer.java
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+++ b/ceph/src/arrow/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/consumer/BigIntConsumer.java
@@ -0,0 +1,87 @@
+/*
+ * 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.arrow.adapter.jdbc.consumer;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import org.apache.arrow.vector.BigIntVector;
+
+/**
+ * Consumer which consume bigint type values from {@link ResultSet}.
+ * Write the data to {@link org.apache.arrow.vector.BigIntVector}.
+ */
+public class BigIntConsumer {
+
+  /**
+   * Creates a consumer for {@link BigIntVector}.
+   */
+  public static JdbcConsumer<BigIntVector> createConsumer(BigIntVector vector, int index, boolean nullable) {
+    if (nullable) {
+      return new NullableBigIntConsumer(vector, index);
+    } else {
+      return new NonNullableBigIntConsumer(vector, index);
+    }
+  }
+
+  /**
+   * Nullable consumer for big int.
+   */
+  static class NullableBigIntConsumer extends BaseConsumer<BigIntVector> {
+
+    /**
+     * Instantiate a BigIntConsumer.
+     */
+    public NullableBigIntConsumer(BigIntVector vector, int index) {
+      super(vector, index);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      long value = resultSet.getLong(columnIndexInResultSet);
+      if (!resultSet.wasNull()) {
+        // for fixed width vectors, we have allocated enough memory proactively,
+        // so there is no need to call the setSafe method here.
+        vector.set(currentIndex, value);
+      }
+      currentIndex++;
+    }
+  }
+
+  /**
+   * Non-nullable consumer for big int.
+   */
+  static class NonNullableBigIntConsumer extends BaseConsumer<BigIntVector> {
+
+    /**
+     * Instantiate a BigIntConsumer.
+     */
+    public NonNullableBigIntConsumer(BigIntVector vector, int index) {
+      super(vector, index);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      long value = resultSet.getLong(columnIndexInResultSet);
+      // for fixed width vectors, we have allocated enough memory proactively,
+      // so there is no need to call the setSafe method here.
+      vector.set(currentIndex, value);
+      currentIndex++;
+    }
+  }
+}