Package io.deephaven.engine.table.impl

Class RenameColumnHelper

java.lang.Object

io.deephaven.engine.table.impl.RenameColumnHelper

public class RenameColumnHelper
extends Object

Constructor Summary

Constructors

Constructor	Description
RenameColumnHelper()

Method Summary

Modifier and Type	Method	Description
static Map<String,String>	createLookupAndValidate(TableDefinition definition, Collection<Pair> pairs)	Create a lookup map from the provided pairs while validating that the pairs are valid (i.e.
static Set<String>	getMaskedColumns(TableDefinition definition, Collection<Pair> pairs)	Get the set of column names that will be masked by a rename operation (i.e.
static Set<String>	getNewColumns(Collection<Pair> pairs)	Get the set of new column names from the provided pairs.

Methods inherited from class java.lang.Object

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

Constructor Details

RenameColumnHelper

public RenameColumnHelper()

Method Details

createLookupAndValidate

public static Map<String,String> createLookupAndValidate(TableDefinition definition,
 Collection<Pair> pairs)

Create a lookup map from the provided pairs while validating that the pairs are valid (i.e. ensure source columns exist, no duplicate source columns, no duplicate destination columns).

getNewColumns

public static Set<String> getNewColumns(Collection<Pair> pairs)

Get the set of new column names from the provided pairs.

getMaskedColumns

public static Set<String> getMaskedColumns(TableDefinition definition,
 Collection<Pair> pairs)

Get the set of column names that will be masked by a rename operation (i.e. table columns that are being replaced by a different renamed column).