Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/18680#discussion_r128425617
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ArrowColumnVector.java
---
@@ -0,0 +1,545 @@
+/*
+ * 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.spark.sql.execution.vectorized;
+
+import org.apache.arrow.vector.*;
+import org.apache.arrow.vector.complex.*;
+import org.apache.arrow.vector.holders.NullableVarCharHolder;
+
+import org.apache.spark.memory.MemoryMode;
+import org.apache.spark.sql.execution.arrow.ArrowUtils;
+import org.apache.spark.sql.types.*;
+import org.apache.spark.unsafe.types.UTF8String;
+
+/**
+ * A column backed by Apache Arrow.
+ */
+public final class ArrowColumnVector extends ReadOnlyColumnVector {
+
+ private final ArrowVectorAccessor accessor;
+
+ @Override
+ public long nullsNativeAddress() {
+ throw new RuntimeException("Cannot get native address for arrow
column");
+ }
+
+ @Override
+ public long valuesNativeAddress() {
+ throw new RuntimeException("Cannot get native address for arrow
column");
+ }
+
+ @Override
+ public void close() {
+ if (childColumns != null) {
+ for (int i = 0; i < childColumns.length; i++) {
+ childColumns[i].close();
+ }
+ }
+ accessor.close();
+ }
+
+ //
+ // APIs dealing with nulls
+ //
+
+ @Override
+ public boolean isNullAt(int rowId) {
+ return accessor.isNullAt(rowId);
+ }
+
+ //
+ // APIs dealing with Booleans
+ //
+
+ @Override
+ public boolean getBoolean(int rowId) {
+ return accessor.getBoolean(rowId);
+ }
+
+ @Override
+ public boolean[] getBooleans(int rowId, int count) {
+ boolean[] array = new boolean[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getBoolean(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with Bytes
+ //
+
+ @Override
+ public byte getByte(int rowId) {
+ return accessor.getByte(rowId);
+ }
+
+ @Override
+ public byte[] getBytes(int rowId, int count) {
+ byte[] array = new byte[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getByte(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with Shorts
+ //
+
+ @Override
+ public short getShort(int rowId) {
+ return accessor.getShort(rowId);
+ }
+
+ @Override
+ public short[] getShorts(int rowId, int count) {
+ short[] array = new short[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getShort(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with Ints
+ //
+
+ @Override
+ public int getInt(int rowId) {
+ return accessor.getInt(rowId);
+ }
+
+ @Override
+ public int[] getInts(int rowId, int count) {
+ int[] array = new int[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getInt(rowId + i);
+ }
+ return array;
+ }
+
+ @Override
+ public int getDictId(int rowId) {
+ throw new UnsupportedOperationException();
+ }
+
+ //
+ // APIs dealing with Longs
+ //
+
+ @Override
+ public long getLong(int rowId) {
+ return accessor.getLong(rowId);
+ }
+
+ @Override
+ public long[] getLongs(int rowId, int count) {
+ long[] array = new long[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getLong(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with floats
+ //
+
+ @Override
+ public float getFloat(int rowId) {
+ return accessor.getFloat(rowId);
+ }
+
+ @Override
+ public float[] getFloats(int rowId, int count) {
+ float[] array = new float[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getFloat(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with doubles
+ //
+
+ @Override
+ public double getDouble(int rowId) {
+ return accessor.getDouble(rowId);
+ }
+
+ @Override
+ public double[] getDoubles(int rowId, int count) {
+ double[] array = new double[count];
+ for (int i = 0; i < count; ++i) {
+ array[i] = accessor.getDouble(rowId + i);
+ }
+ return array;
+ }
+
+ //
+ // APIs dealing with Arrays
+ //
+
+ @Override
+ public int getArrayLength(int rowId) {
+ return accessor.getArrayLength(rowId);
+ }
+
+ @Override
+ public int getArrayOffset(int rowId) {
+ return accessor.getArrayOffset(rowId);
+ }
+
+ @Override
+ public void loadBytes(Array array) {
+ throw new UnsupportedOperationException();
+ }
+
+ //
+ // APIs dealing with Decimals
+ //
+
+ @Override
+ public Decimal getDecimal(int rowId, int precision, int scale) {
+ return accessor.getDecimal(rowId, precision, scale);
+ }
+
+ //
+ // APIs dealing with UTF8Strings
+ //
+
+ @Override
+ public UTF8String getUTF8String(int rowId) {
+ return accessor.getUTF8String(rowId);
+ }
+
+ //
+ // APIs dealing with Binaries
+ //
+
+ @Override
+ public byte[] getBinary(int rowId) {
+ return accessor.getBinary(rowId);
+ }
+
+ public ArrowColumnVector(ValueVector vector) {
+ super(vector.getValueCapacity(), MemoryMode.OFF_HEAP);
+
+ type = ArrowUtils.fromArrowField(vector.getField());
+ if (vector instanceof NullableBitVector) {
+ accessor = new BooleanAccessor((NullableBitVector) vector);
+ } else if (vector instanceof NullableTinyIntVector) {
+ accessor = new ByteAccessor((NullableTinyIntVector) vector);
+ } else if (vector instanceof NullableSmallIntVector) {
+ accessor = new ShortAccessor((NullableSmallIntVector) vector);
+ } else if (vector instanceof NullableIntVector) {
+ accessor = new IntAccessor((NullableIntVector) vector);
+ } else if (vector instanceof NullableBigIntVector) {
+ accessor = new LongAccessor((NullableBigIntVector) vector);
+ } else if (vector instanceof NullableFloat4Vector) {
+ accessor = new FloatAccessor((NullableFloat4Vector) vector);
+ } else if (vector instanceof NullableFloat8Vector) {
+ accessor = new DoubleAccessor((NullableFloat8Vector) vector);
+ } else if (vector instanceof NullableDecimalVector) {
+ accessor = new DecimalAccessor((NullableDecimalVector) vector);
+ } else if (vector instanceof NullableVarCharVector) {
+ accessor = new StringAccessor((NullableVarCharVector) vector);
+ } else if (vector instanceof NullableVarBinaryVector) {
+ accessor = new BinaryAccessor((NullableVarBinaryVector) vector);
+ } else if (vector instanceof ListVector) {
+ ListVector listVector = (ListVector) vector;
+ accessor = new ArrayAccessor(listVector);
+
+ childColumns = new ColumnVector[1];
+ childColumns[0] = new ArrowColumnVector(listVector.getDataVector());
+ resultArray = new Array(childColumns[0]);
+ } else if (vector instanceof MapVector) {
+ MapVector mapVector = (MapVector) vector;
+ accessor = new StructAccessor(mapVector);
+
+ childColumns = new ArrowColumnVector[mapVector.size()];
+ for (int i = 0; i < childColumns.length; ++i) {
+ childColumns[i] = new
ArrowColumnVector(mapVector.getVectorById(i));
+ }
+ resultStruct = new ColumnarBatch.Row(childColumns);
+ } else {
+ throw new UnsupportedOperationException();
--- End diff --
Unfortunately, this class is written in Java, so we can't use a pattern
match.
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