import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / vector / src / main / java / org / apache / arrow / vector / complex / impl / NullableStructReaderImpl.java

diff --git a/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/complex/impl/NullableStructReaderImpl.java b/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/complex/impl/NullableStructReaderImpl.java
new file mode 100644 (file)
index 0000000..5c098f6
--- /dev/null
+++ b/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/complex/impl/NullableStructReaderImpl.java
@@ -0,0 +1,59 @@
+/*
+ * 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.vector.complex.impl;
+
+import org.apache.arrow.vector.complex.NonNullableStructVector;
+import org.apache.arrow.vector.complex.StructVector;
+import org.apache.arrow.vector.complex.writer.BaseWriter.StructWriter;
+import org.apache.arrow.vector.types.pojo.Field;
+
+/**
+ * An {@link org.apache.arrow.vector.complex.reader.FieldReader} for
+ * reading nullable struct vectors.
+ */
+public class NullableStructReaderImpl extends SingleStructReaderImpl {
+
+  private StructVector nullableStructVector;
+
+  public NullableStructReaderImpl(NonNullableStructVector vector) {
+    super(vector);
+    this.nullableStructVector = (StructVector) vector;
+  }
+
+  @Override
+  public Field getField() {
+    return nullableStructVector.getField();
+  }
+
+  @Override
+  public void copyAsValue(StructWriter writer) {
+    NullableStructWriter impl = (NullableStructWriter) writer;
+    impl.container.copyFromSafe(idx(), impl.idx(), nullableStructVector);
+  }
+
+  @Override
+  public void copyAsField(String name, StructWriter writer) {
+    NullableStructWriter impl = (NullableStructWriter) writer.struct(name);
+    impl.container.copyFromSafe(idx(), impl.idx(), nullableStructVector);
+  }
+
+  @Override
+  public boolean isSet() {
+    return !nullableStructVector.isNull(idx());
+  }
+}