Package net.hydromatic.morel.foreign

Class RelList

java.lang.Object

java.util.AbstractCollection<Object>

java.util.AbstractList<Object>

net.hydromatic.morel.foreign.RelList

All Implemented Interfaces:

Iterable<Object>, Collection<Object>, List<Object>, SequencedCollection<Object>

public class RelList
extends AbstractList<Object>

A list whose contents are computed by evaluating a relational expression.

Field Summary

Fields

Modifier and Type	Field	Description
final org.apache.calcite.rel.RelNode	rel
static final String	RELATION	Value printed instead of the contents of an external relation.
private final Supplier<List<Object>>	supplier

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
RelList(org.apache.calcite.rel.RelNode rel, org.apache.calcite.DataContext dataContext, Function<Object[],Object> converter)

Method Summary

Modifier and Type	Method	Description
String	asString()	Returns the contents of this list as a string.
Object	get(int index)
int	size()
String	toString()	Returns "<list>".

Methods inherited from class java.util.AbstractList

add, add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.List

addAll, addFirst, addLast, contains, containsAll, getFirst, getLast, isEmpty, remove, removeAll, removeFirst, removeLast, replaceAll, retainAll, reversed, sort, spliterator, toArray, toArray

Field Details

RELATION

public static final String RELATION

Value printed instead of the contents of an external relation.

See Also:

• Constant Field Values

rel

public final org.apache.calcite.rel.RelNode rel

supplier

private final Supplier<List<Object>> supplier

Constructor Details

RelList

RelList(org.apache.calcite.rel.RelNode rel,
 org.apache.calcite.DataContext dataContext,
 Function<Object[],Object> converter)

Method Details

get

public Object get(int index)

Specified by:

get in interface List<Object>

Specified by:

get in class AbstractList<Object>

size

public int size()

Specified by:

size in interface Collection<Object>

Specified by:

size in interface List<Object>

Specified by:

size in class AbstractCollection<Object>

toString

public String toString()

Returns "<list>". Does not obey the usual behavior for collections, concatenating the string representations of all elements, because some tables are huge.

Overrides:

toString in class AbstractCollection<Object>

See Also:

• asString()

asString

public String asString()

Returns the contents of this list as a string.

This method does not override the toString() method; if we did, debuggers would invoke it automatically, burning lots of CPU and memory.

See Also:

• Environment.asString()