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https://issues.apache.org/jira/browse/ARROW-1866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16271940#comment-16271940
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ASF GitHub Bot commented on ARROW-1866:
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icexelloss commented on a change in pull request #1371: ARROW-1866: [Java]
Combine MapVector classes and remove NonNullableMapVector
URL: https://github.com/apache/arrow/pull/1371#discussion_r153962135
##########
File path:
java/vector/src/main/java/org/apache/arrow/vector/complex/MapVector.java
##########
@@ -35,27 +38,32 @@
import org.apache.arrow.vector.complex.impl.NullableMapWriter;
import org.apache.arrow.vector.holders.ComplexHolder;
import org.apache.arrow.vector.ipc.message.ArrowFieldNode;
+import org.apache.arrow.vector.types.Types;
import org.apache.arrow.vector.types.pojo.ArrowType;
import org.apache.arrow.vector.types.pojo.ArrowType.Struct;
import org.apache.arrow.vector.types.pojo.DictionaryEncoding;
import org.apache.arrow.vector.types.pojo.FieldType;
import org.apache.arrow.vector.types.pojo.Field;
import org.apache.arrow.vector.util.CallBack;
+import org.apache.arrow.vector.util.JsonStringHashMap;
import org.apache.arrow.vector.util.OversizedAllocationException;
import org.apache.arrow.vector.util.TransferPair;
-public class MapVector extends NonNullableMapVector implements FieldVector {
+import javax.annotation.Nullable;
+
+public class MapVector extends AbstractMapVector implements FieldVector {
public static MapVector empty(String name, BufferAllocator allocator) {
FieldType fieldType = FieldType.nullable(Struct.INSTANCE);
return new MapVector(name, allocator, fieldType, null);
}
- private final NullableMapReaderImpl reader = new NullableMapReaderImpl(this);
- private final NullableMapWriter writer = new NullableMapWriter(this);
-
protected ArrowBuf validityBuffer;
private int validityAllocationSizeInBytes;
+ private final FieldType fieldType;
+ private int valueCount;
+ private final NullableMapReaderImpl reader;
Review comment:
Do we want to do something with the name here? i.e `MapReaderImpl` and
`MapWriterImpl` ?
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> [Java] Combine MapVector and NonNullableMapVector Classes
> ---------------------------------------------------------
>
> Key: ARROW-1866
> URL: https://issues.apache.org/jira/browse/ARROW-1866
> Project: Apache Arrow
> Issue Type: Sub-task
> Components: Java - Vectors
> Reporter: Bryan Cutler
> Assignee: Bryan Cutler
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> {{NonNullableMapVector}} class can be merged into {{MapVector}} and removed
> as part of removing the non nullable vectors.
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