Package com.apple.foundationdb.record.query.plan.temp

Class AliasMap.Builder

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.AliasMap.Builder

Enclosing class:

AliasMap

public static class AliasMap.Builder
extends Object

Builder class for the AliasMap.

Method Summary

Modifier and Type	Method	Description
AliasMap	build()	Build a new AliasMap.
AliasMap.Builder	identitiesFor(Set<CorrelationIdentifier> aliases)	Method to update the builder to contain entries a -> a, b -> b, ... for each alias contained in the set of CorrelationIdentifiers passed in.
AliasMap.Builder	put(CorrelationIdentifier source, CorrelationIdentifier target)	Put a new binding between source and target.
AliasMap.Builder	putAll(AliasMap other)	Put all binding that are contained in another AliasMap.
AliasMap.Builder	zip(List<CorrelationIdentifier> left, List<CorrelationIdentifier> right)	Method to update the builder to additionally contain the zip of two parallel lists of aliases.

Methods inherited from class java.lang.Object

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

Method Detail

put

@Nonnull
public AliasMap.Builder put(@Nonnull
                            CorrelationIdentifier source,
                            @Nonnull
                            CorrelationIdentifier target)

Put a new binding between source and target. Note that if there is already a binding for source, the binding will remain untouched if target.equals(oldTarget), it will be replaced with source -> target otherwise. Also, putting a binding for a target that already exists will fail.

Parameters:

source - a source alias

target - a target alias

Returns:

this that has been modified to contain source -> target

Throws:

IllegalArgumentException - if target is already contained in the builder

putAll

@Nonnull
public AliasMap.Builder putAll(@Nonnull
                               AliasMap other)

Put all binding that are contained in another AliasMap. Note that if there are already bindings for sources contained in other, these bindings will remain untouched if target.equals(oldTarget), they will be replaced otherwise. Also, this call will fail if a target contained in other already exists in this,

Parameters:

other - another AliasMap

Returns:

this that has been modified to contain all bindings from other

Throws:

IllegalArgumentException - if any target contained in other is already contained in the builder

identitiesFor

@Nonnull
public AliasMap.Builder identitiesFor(Set<CorrelationIdentifier> aliases)

Method to update the builder to contain entries a -> a, b -> b, ... for each alias contained in the set of CorrelationIdentifiers passed in.

Parameters:

aliases - set of aliases that this method should create identity-bindings for

Returns:

this that has been modified to contain identity-bindings for all aliases contained in aliases

zip

@Nonnull
public AliasMap.Builder zip(@Nonnull
                            List<CorrelationIdentifier> left,
                            @Nonnull
                            List<CorrelationIdentifier> right)

Method to update the builder to additionally contain the zip of two parallel lists of aliases.

Parameters:

left - one list

right - other list

Returns:

this that has been modified to contain the zip of left and right as bindings l -> r;

build

@Nonnull
public AliasMap build()

Build a new AliasMap. This will entail a copy of the mappings in order to gain immutability guarantees.

Returns:

a new AliasMap