org.basex.index.value

Class ValueBuilder

java.lang.Object

org.basex.core.Progress

org.basex.index.IndexBuilder

org.basex.index.value.ValueBuilder

public final class ValueBuilder
extends IndexBuilder

This class builds an index for attribute values and text contents in a tree structure and stores the result to disk.

The data is stored on disk in the following format:

• DATATXT/ATV + 'l': contains the index values, which are dense id lists to all text nodes/attribute values, stored in the Num format: [size0, id1, id2, ...]. The number of index keys is stored in the first 4 bytes of the file.
• DATATXT/ATV + 'r': contains 5-byte references to the id lists for all keys. To save space, the keys itself are not stored in the index structure. Instead, they can be found by following the id references to the main table.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.index.IndexBuilder

csize, data, merge, pre, size

Fields inherited from class org.basex.core.Progress

updating

Constructor Summary

Constructors

Constructor and Description
ValueBuilder(Data d, boolean txt) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	abort() Aborts a failed or interrupted progress.
DiskValues	build() Builds the index structure and returns an index instance.
protected java.lang.String	det() Returns short information on this process.

Methods inherited from class org.basex.index.IndexBuilder

check, memFull, prog, tit

Methods inherited from class org.basex.core.Progress

checkStop, detail, progress, progress, startTimeout, stop, stopTimeout, title

Methods inherited from class java.lang.Object

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

Constructor Detail

ValueBuilder

public ValueBuilder(Data d,
            boolean txt)

Constructor.

Parameters:

d - data reference

txt - value type (text/attribute)

Method Detail

build

public DiskValues build()
                 throws java.io.IOException

Description copied from class: IndexBuilder

Builds the index structure and returns an index instance.

Specified by:

build in class IndexBuilder

Returns:

index instance

Throws:

java.io.IOException - I/O Exception

abort

public void abort()

Description copied from class: Progress

Aborts a failed or interrupted progress.

Overrides:

abort in class Progress

det

protected java.lang.String det()

Description copied from class: Progress

Returns short information on this process.

Overrides:

det in class Progress

Returns:

header information