org.basex.query.util.index

Class IndexCosts

java.lang.Object

org.basex.query.util.index.IndexCosts

All Implemented Interfaces:

Comparable<IndexCosts>

public final class IndexCosts
extends Object
implements Comparable<IndexCosts>

Costs of index request.

Author:

BaseX Team 2005-21, BSD License, Christian Gruen

Field Summary

Fields

Modifier and Type	Field and Description
static IndexCosts	ENFORCE_DYNAMIC Enforce index creation (dynamic query terms).
static IndexCosts	ENFORCE_STATIC Enforce index creation (static query terms).
static IndexCosts	ZERO No results.

Method Summary

Modifier and Type	Method and Description
static IndexCosts	add(IndexCosts ic1, IndexCosts ic2) Adds index costs.
int	compareTo(IndexCosts ic)
static IndexCosts	get(int results) Constructor.
int	results() Number of expected results.
boolean	tooExpensive(Data data) Checks if index access is too expensive.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ENFORCE_STATIC

public static final IndexCosts ENFORCE_STATIC

Enforce index creation (static query terms).

ENFORCE_DYNAMIC

public static final IndexCosts ENFORCE_DYNAMIC

Enforce index creation (dynamic query terms).

ZERO

public static final IndexCosts ZERO

No results.

Method Detail

get

public static IndexCosts get(int results)

Constructor.

Parameters:

results - number of expected results

Returns:

costs

add

public static IndexCosts add(IndexCosts ic1,
                             IndexCosts ic2)

Adds index costs.

Parameters:

ic1 - first costs

ic2 - second costs

Returns:

new costs

results

public int results()

Number of expected results.

Returns:

results

tooExpensive

public boolean tooExpensive(Data data)

Checks if index access is too expensive.

Parameters:

data - data reference (can be null)

Returns:

result of check

compareTo

public int compareTo(IndexCosts ic)

Specified by:

compareTo in interface Comparable<IndexCosts>

toString

public String toString()

Overrides:

toString in class Object