org.teiid.query.sql.util

Interface ValueIteratorSource

All Known Implementing Classes:

DependentValueSource

public interface ValueIteratorSource

The ValueIteratorSource lets a language object that needs a ValueIterator hold this reference to the source of the ValueIterator as a reference until the ValueIterator can be ready.

Since:

5.0.1

Method Summary

Modifier and Type	Method and Description
Set<Object>	getCachedSet(Expression valueExpression)
ValueIterator	getValueIterator(Expression valueExpression) Attempt to obtain a ValueIterator from this source.
boolean	isUnused()
void	setUnused(boolean unused)

Method Detail

getValueIterator

ValueIterator getValueIterator(Expression valueExpression)
                        throws TeiidComponentException

Attempt to obtain a ValueIterator from this source. If the iterator is not ready yet, return null to indicate that.

Parameters:

valueExpression - The expression we are retrieving an iterator for

Returns:

ValueIterator if ready, null otherwise

Throws:

TeiidComponentException

Since:

5.0.1

getCachedSet

Set<Object> getCachedSet(Expression valueExpression)
                  throws TeiidComponentException,
                         TeiidProcessingException

Throws:

TeiidComponentException

TeiidProcessingException

setUnused

void setUnused(boolean unused)

isUnused

boolean isUnused()