org.apache.calcite.util

Class ImmutableBitSet.Rebuilder

java.lang.Object

org.apache.calcite.util.ImmutableBitSet.Builder

org.apache.calcite.util.ImmutableBitSet.Rebuilder

Enclosing class:

ImmutableBitSet

private static class ImmutableBitSet.Rebuilder
extends ImmutableBitSet.Builder

Refinement of ImmutableBitSet.Builder that remembers its original ImmutableBitSet and tries to use it when build() is called.

Field Summary

Fields

Modifier and Type	Field and Description
private ImmutableBitSet	originalBitSet

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Rebuilder(ImmutableBitSet originalBitSet)

Method Summary

Modifier and Type	Method and Description
ImmutableBitSet	build() Builds an ImmutableBitSet from the contents of this Builder.
ImmutableBitSet	build(ImmutableBitSet bitSet) Builds an ImmutableBitSet from the contents of this Builder, using an existing ImmutableBitSet if it happens to have the same contents.

Methods inherited from class org.apache.calcite.util.ImmutableBitSet.Builder

addAll, addAll, addAll, cardinality, clear, intersect, isEmpty, removeAll, set, set, wouldEqual

Methods inherited from class java.lang.Object

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

Field Detail

originalBitSet

private final ImmutableBitSet originalBitSet

Constructor Detail

Rebuilder

private Rebuilder(ImmutableBitSet originalBitSet)

Method Detail

build

public ImmutableBitSet build()

Description copied from class: ImmutableBitSet.Builder

Builds an ImmutableBitSet from the contents of this Builder.

After calling this method, the Builder cannot be used again.

Overrides:

build in class ImmutableBitSet.Builder

build

public ImmutableBitSet build(ImmutableBitSet bitSet)

Description copied from class: ImmutableBitSet.Builder

Builds an ImmutableBitSet from the contents of this Builder, using an existing ImmutableBitSet if it happens to have the same contents.

Supplying the existing bit set if useful for set operations, where there is a significant chance that the original bit set is unchanged. We save memory because we use the same copy. For example:

 ImmutableBitSet primeNumbers;
 ImmutableBitSet hundreds = ImmutableBitSet.of(100, 200, 300);
 return primeNumbers.except(hundreds);

After calling this method, the Builder cannot be used again.

Overrides:

build in class ImmutableBitSet.Builder