org.apache.parquet.filter2.predicate

Class ValidTypeMap

java.lang.Object

org.apache.parquet.filter2.predicate.ValidTypeMap

public class ValidTypeMap
extends Object

Contains all valid mappings from class -> parquet type (and vice versa) for use in FilterPredicates

This is a bit ugly, but it allows us to provide good error messages at runtime when there are type mismatches.

TODO: this has some overlap with PrimitiveType.PrimitiveTypeName.javaType TODO: (https://issues.apache.org/jira/browse/PARQUET-30)

Method Summary

Modifier and Type	Method and Description
static <T extends Comparable<T>> void	assertTypeValid(Operators.Column<T> foundColumn, PrimitiveType.PrimitiveTypeName primitiveType) Asserts that foundColumn was declared as a type that is compatible with the type for this column found in the schema of the parquet file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

assertTypeValid

public static <T extends Comparable<T>> void assertTypeValid(Operators.Column<T> foundColumn,
                                                             PrimitiveType.PrimitiveTypeName primitiveType)

Asserts that foundColumn was declared as a type that is compatible with the type for this column found in the schema of the parquet file.

Type Parameters:

T - the java Type of values in the column, must be Comparable

Parameters:

foundColumn - the column as declared by the user

primitiveType - the primitive type according to the schema

Throws:

IllegalArgumentException - if the types do not align