cz.o2.proxima.direct.randomaccess

Class MultiAccessBuilder

java.lang.Object

cz.o2.proxima.direct.randomaccess.MultiAccessBuilder

All Implemented Interfaces:

java.io.Serializable

@Stable
public class MultiAccessBuilder
extends java.lang.Object
implements java.io.Serializable

A builder for RandomAccessReader reading from multiple attribute families.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	MultiAccessBuilder.SequentialOffset

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Map<AttributeDescriptor<?>,RandomAccessReader.Factory<?>>	attrMapToFactory
private Context	context
private Repository	repo
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
MultiAccessBuilder(Repository repo, Context context)

Method Summary

Modifier and Type	Method and Description
MultiAccessBuilder	addAttributes(RandomAccessReader reader, AttributeDescriptor<?>... attrs) Add specified attributes to be read with given reader.
MultiAccessBuilder	addFamily(AttributeFamilyDescriptor family) Add specified family to be read with given reader.
RandomAccessReader	build() Create RandomAccessReader for attributes and/or families specified in this builder.
private EntityDescriptor	getSingleEntityOrNull(java.util.Map<AttributeDescriptor<?>,RandomAccessReader> attrMap)
private java.util.Map<AttributeDescriptor<?>,RandomAccessReader>	materializeReaders(Repository repo)

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

repo

private transient Repository repo

context

private final Context context

attrMapToFactory

private final java.util.Map<AttributeDescriptor<?>,RandomAccessReader.Factory<?>> attrMapToFactory

Constructor Detail

MultiAccessBuilder

MultiAccessBuilder(Repository repo,
                   Context context)

Method Detail

addAttributes

public MultiAccessBuilder addAttributes(RandomAccessReader reader,
                                        AttributeDescriptor<?>... attrs)

Add specified attributes to be read with given reader.

Parameters:

reader - the reader to use to read attributes

attrs - the attributes to read with specified reader

Returns:

this

addFamily

public MultiAccessBuilder addFamily(AttributeFamilyDescriptor family)

Add specified family to be read with given reader.

Parameters:

family - family to access with the built reader

Returns:

this

build

public RandomAccessReader build()

Create RandomAccessReader for attributes and/or families specified in this builder.

Returns:

RandomAccessReader capable of reading from multiple attribute families.

materializeReaders

private java.util.Map<AttributeDescriptor<?>,RandomAccessReader> materializeReaders(Repository repo)

getSingleEntityOrNull

@Nullable
private EntityDescriptor getSingleEntityOrNull(java.util.Map<AttributeDescriptor<?>,RandomAccessReader> attrMap)