Package org.apache.druid.frame.field
Class DoubleFieldWriter
- java.lang.Object
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- org.apache.druid.frame.field.NumericFieldWriter
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- org.apache.druid.frame.field.DoubleFieldWriter
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- All Implemented Interfaces:
Closeable
,AutoCloseable
,FieldWriter
public class DoubleFieldWriter extends NumericFieldWriter
Wraps aBaseDoubleColumnValueSelector
and writes field values.
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Field Summary
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Fields inherited from class org.apache.druid.frame.field.NumericFieldWriter
ARRAY_ELEMENT_NOT_NULL_BYTE, ARRAY_ELEMENT_NULL_BYTE, NOT_NULL_BYTE, NULL_BYTE
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static DoubleFieldWriter
forArray(BaseDoubleColumnValueSelector selector)
static DoubleFieldWriter
forPrimitive(BaseDoubleColumnValueSelector selector)
int
getNumericSizeBytes()
void
writeNullToMemory(org.apache.datasketches.memory.WritableMemory memory, long position)
Writes the default value for the type to the memory.void
writeSelectorToMemory(org.apache.datasketches.memory.WritableMemory memory, long position)
Writes the value pointed by the selector to memory.-
Methods inherited from class org.apache.druid.frame.field.NumericFieldWriter
close, writeTo
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Method Detail
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forPrimitive
public static DoubleFieldWriter forPrimitive(BaseDoubleColumnValueSelector selector)
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forArray
public static DoubleFieldWriter forArray(BaseDoubleColumnValueSelector selector)
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getNumericSizeBytes
public int getNumericSizeBytes()
- Specified by:
getNumericSizeBytes
in classNumericFieldWriter
- Returns:
- The size in bytes of the numeric datatype that the implementation of this writer occupies
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writeSelectorToMemory
public void writeSelectorToMemory(org.apache.datasketches.memory.WritableMemory memory, long position)
Description copied from class:NumericFieldWriter
Writes the value pointed by the selector to memory. The caller should ensure that the selector gives out the correct primitive type- Specified by:
writeSelectorToMemory
in classNumericFieldWriter
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writeNullToMemory
public void writeNullToMemory(org.apache.datasketches.memory.WritableMemory memory, long position)
Description copied from class:NumericFieldWriter
Writes the default value for the type to the memory. For long, it is 0L, for double, it is 0.0d etc. Useful mainly when the SQL incompatible mode is turned off, and maintains the fact that the size of the numeric field written doesn't vary irrespective of whether the value is null- Specified by:
writeNullToMemory
in classNumericFieldWriter
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