Test-specific column accessor implementation. Provides a simplified, unified set of access methods for value vectors specifically for wrting simple, compact unit test code.
* Interfaces for column readers and writers
* Interfaces for tuple (row and map) readers and writers
* Generated implementations
* Base implementation used by the generated code
* Factory class to create the proper reader or writer given a major
type (type and cardinality)
* Utilities for generic access, type conversions, etc.
Many vector types can be mapped to an int for get and set. One key
exception are the decimal types: decimals, by definition, require a
different representation. In Java, that is `BigDecimal`. Added get, set
and setSafe accessors as required for each decimal type that uses
`BigDecimal` to hold data.
The generated code builds on the `valueVectorTypes.tdd` file, adding
additional properties needed to generate the accessors.
The PR also includes a number of code cleanups done while reviewing
existing code. In particular `DecimalUtility` was very roughly
formatted and thus hard to follow.
Supports Drill’s interval types (INTERVAL, INTERVALDAY,
INTERVALYEAR) in the form of the Joda interval class.
Adds support for Map vectors. Maps are treated as nested tuples and are
expanded out to create a flattened row in the schema. The accessors
then access rows using the flattened column index or the combined name
(“a.b”).
Supports arrays via a writer interface that appends values as written,
and an indexed, random-access reader interface.
Removed HTTP log parser from JDBC jar to keep the JDBC jar from getting
too big.
close apache/drill#783
