import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / adapter / avro / src / main / java / org / apache / arrow / AvroToArrow.java

diff --git a/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/AvroToArrow.java b/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/AvroToArrow.java
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+++ b/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/AvroToArrow.java
@@ -0,0 +1,67 @@
+/*
+ * 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;
+
+import java.io.IOException;
+
+import org.apache.arrow.util.Preconditions;
+import org.apache.arrow.vector.VectorSchemaRoot;
+import org.apache.avro.Schema;
+import org.apache.avro.io.Decoder;
+
+/**
+ * Utility class to convert Avro objects to columnar Arrow format objects.
+ */
+public class AvroToArrow {
+
+  /**
+   * Fetch the data from {@link Decoder} and convert it to Arrow objects.
+   * Only for testing purpose.
+   * @param schema avro schema.
+   * @param decoder avro decoder
+   * @param config configuration of the conversion.
+   * @return Arrow Data Objects {@link VectorSchemaRoot}
+   */
+  static VectorSchemaRoot avroToArrow(Schema schema, Decoder decoder, AvroToArrowConfig config)
+      throws IOException {
+    Preconditions.checkNotNull(schema, "Avro schema object can not be null");
+    Preconditions.checkNotNull(decoder, "Avro decoder object can not be null");
+    Preconditions.checkNotNull(config, "config can not be null");
+
+    return AvroToArrowUtils.avroToArrowVectors(schema, decoder, config);
+  }
+
+  /**
+   * Fetch the data from {@link Decoder} and iteratively convert it to Arrow objects.
+   * @param schema avro schema
+   * @param decoder avro decoder
+   * @param config configuration of the conversion.
+   * @throws IOException on error
+   */
+  public static AvroToArrowVectorIterator avroToArrowIterator(
+      Schema schema,
+      Decoder decoder,
+      AvroToArrowConfig config) throws IOException {
+
+    Preconditions.checkNotNull(schema, "Avro schema object can not be null");
+    Preconditions.checkNotNull(decoder, "Avro decoder object can not be null");
+    Preconditions.checkNotNull(config, "config can not be null");
+
+    return AvroToArrowVectorIterator.create(decoder, schema, config);
+  }
+}