import quincy 17.2.0

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

diff --git a/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/consumers/CompositeAvroConsumer.java b/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/consumers/CompositeAvroConsumer.java
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+++ b/ceph/src/arrow/java/adapter/avro/src/main/java/org/apache/arrow/consumers/CompositeAvroConsumer.java
@@ -0,0 +1,73 @@
+/*
+ * 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.consumers;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.arrow.util.AutoCloseables;
+import org.apache.arrow.vector.VectorSchemaRoot;
+import org.apache.avro.io.Decoder;
+
+/**
+ * Composite consumer which hold all consumers.
+ * It manages the consume and cleanup process.
+ */
+public class CompositeAvroConsumer implements AutoCloseable {
+
+  private final List<Consumer> consumers;
+
+  public List<Consumer> getConsumers() {
+    return consumers;
+  }
+
+  public CompositeAvroConsumer(List<Consumer> consumers) {
+    this.consumers = consumers;
+  }
+
+  /**
+   * Consume decoder data.
+   */
+  public void consume(Decoder decoder) throws IOException {
+    for (Consumer consumer : consumers) {
+      consumer.consume(decoder);
+    }
+  }
+
+  /**
+   * Reset vector of consumers with the given {@link VectorSchemaRoot}.
+   */
+  public void resetConsumerVectors(VectorSchemaRoot root) {
+    int index = 0;
+    for (Consumer consumer : consumers) {
+      if (consumer.resetValueVector(root.getFieldVectors().get(index))) {
+        index++;
+      }
+    }
+  }
+
+  @Override
+  public void close() {
+    // clean up
+    try {
+      AutoCloseables.close(consumers);
+    } catch (Exception e) {
+      throw new RuntimeException("Error occurs in close.", e);
+    }
+  }
+}