ARROW-17: set some vector fields to package level access for Drill compatibility

Author: StevenMPhillips

java/vector/src/main/codegen/templates/BasicTypeHelper.java

@@ -231,6 +231,7 @@ public static ValueVector getNewVector(MaterializedField field, BufferAllocator
     return getNewVector(field, allocator, null);
   }
   public static ValueVector getNewVector(MaterializedField field, BufferAllocator allocator, CallBack callBack){
+    field = field.clone();
     MajorType type = field.getType();
 
     switch (type.getMinorType()) {

java/vector/src/main/codegen/templates/NullableValueVectors.java

@@ -45,8 +45,10 @@ public final class ${className} extends BaseDataValueVector implements <#if type
   private final FieldReader reader = new Nullable${minor.class}ReaderImpl(Nullable${minor.class}Vector.this);
 
   private final MaterializedField bitsField = MaterializedField.create("$bits$", new MajorType(MinorType.UINT1, DataMode.REQUIRED));
-  private final UInt1Vector bits = new UInt1Vector(bitsField, allocator);
-  private final ${valuesName} values = new ${minor.class}Vector(field, allocator);
+  private final MaterializedField valuesField = MaterializedField.create("$values$", new MajorType(field.getType().getMinorType(), DataMode.REQUIRED, field.getPrecision(), field.getScale()));
+
+  final UInt1Vector bits = new UInt1Vector(bitsField, allocator);
+  final ${valuesName} values = new ${minor.class}Vector(valuesField, allocator);
 
   private final Mutator mutator = new Mutator();
   private final Accessor accessor = new Accessor();

java/vector/src/main/codegen/templates/RepeatedValueVectors.java

@@ -42,7 +42,7 @@ public final class Repeated${minor.class}Vector extends BaseRepeatedValueVector
   //private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(Repeated${minor.class}Vector.class);
 
   // we maintain local reference to concrete vector type for performance reasons.
-  private ${minor.class}Vector values;
+  ${minor.class}Vector values;
   private final FieldReader reader = new Repeated${minor.class}ReaderImpl(Repeated${minor.class}Vector.this);
   private final Mutator mutator = new Mutator();
   private final Accessor accessor = new Accessor();

java/vector/src/main/codegen/templates/UnionVector.java

@@ -51,9 +51,9 @@ public class UnionVector implements ValueVector {
   private BufferAllocator allocator;
   private Accessor accessor = new Accessor();
   private Mutator mutator = new Mutator();
-  private int valueCount;
+  int valueCount;
 
-  private MapVector internalMap;
+  MapVector internalMap;
   private UInt1Vector typeVector;
 
   private MapVector mapVector;

java/vector/src/main/codegen/templates/VariableLengthVectors.java

@@ -57,7 +57,7 @@ public final class ${minor.class}Vector extends BaseDataValueVector implements V
 
   public final static String OFFSETS_VECTOR_NAME = "$offsets$";
   private final MaterializedField offsetsField = MaterializedField.create(OFFSETS_VECTOR_NAME, new MajorType(MinorType.UINT4, DataMode.REQUIRED));
-  private final UInt${type.width}Vector offsetVector = new UInt${type.width}Vector(offsetsField, allocator);
+  final UInt${type.width}Vector offsetVector = new UInt${type.width}Vector(offsetsField, allocator);
   private final FieldReader reader = new ${minor.class}ReaderImpl(${minor.class}Vector.this);
 
   private final Accessor accessor;

java/vector/src/main/java/org/apache/arrow/vector/BitVector.java

@@ -41,7 +41,7 @@ public final class BitVector extends BaseDataValueVector implements FixedWidthVe
   private final Accessor accessor = new Accessor();
   private final Mutator mutator = new Mutator();
 
-  private int valueCount;
+  int valueCount;
   private int allocationSizeInBytes = INITIAL_VALUE_ALLOCATION;
   private int allocationMonitor = 0;
 
@@ -64,7 +64,7 @@ public int getBufferSizeFor(final int valueCount) {
     return getSizeFromCount(valueCount);
   }
 
-  private int getSizeFromCount(int valueCount) {
+  int getSizeFromCount(int valueCount) {
     return (int) Math.ceil(valueCount / 8.0);
   }
 

java/vector/src/main/java/org/apache/arrow/vector/complex/ListVector.java

@@ -47,8 +47,8 @@
 
 public class ListVector extends BaseRepeatedValueVector {
 
-  private UInt4Vector offsets;
-  private final UInt1Vector bits;
+  UInt4Vector offsets;
+  final UInt1Vector bits;
   private Mutator mutator = new Mutator();
   private Accessor accessor = new Accessor();
   private UnionListWriter writer;

java/vector/src/main/java/org/apache/arrow/vector/complex/MapVector.java

@@ -52,7 +52,7 @@ public class MapVector extends AbstractMapVector {
   private final SingleMapReaderImpl reader = new SingleMapReaderImpl(MapVector.this);
   private final Accessor accessor = new Accessor();
   private final Mutator mutator = new Mutator();
-  private int valueCount;
+  int valueCount;
 
   public MapVector(String path, BufferAllocator allocator, CallBack callBack){
     this(MaterializedField.create(path, TYPE), allocator, callBack);

java/vector/src/main/java/org/apache/arrow/vector/complex/RepeatedListVector.java

@@ -49,7 +49,7 @@ public class RepeatedListVector extends AbstractContainerVector
 
   public final static MajorType TYPE = new MajorType(MinorType.LIST, DataMode.REPEATED);
   private final RepeatedListReaderImpl reader = new RepeatedListReaderImpl(null, this);
-  private final DelegateRepeatedVector delegate;
+  final DelegateRepeatedVector delegate;
 
   protected static class DelegateRepeatedVector extends BaseRepeatedValueVector {
 
@@ -313,7 +313,6 @@ public <T extends ValueVector> AddOrGetResult<T> addOrGetVector(VectorDescriptor
     if (result.isCreated() && callBack != null) {
       callBack.doWork();
     }
-    this.field = delegate.getField();
     return result;
   }
 

java/vector/src/main/java/org/apache/arrow/vector/complex/RepeatedMapVector.java

@@ -53,7 +53,7 @@ public class RepeatedMapVector extends AbstractMapVector
 
   public final static MajorType TYPE = new MajorType(MinorType.MAP, DataMode.REPEATED);
 
-  private final UInt4Vector offsets;   // offsets to start of each record (considering record indices are 0-indexed)
+  final UInt4Vector offsets;   // offsets to start of each record (considering record indices are 0-indexed)
   private final RepeatedMapReaderImpl reader = new RepeatedMapReaderImpl(RepeatedMapVector.this);
   private final RepeatedMapAccessor accessor = new RepeatedMapAccessor();
   private final Mutator mutator = new Mutator();