Package com.db4o.config

Class QueryEvaluationMode

java.lang.Object

com.db4o.config.QueryEvaluationMode

public class QueryEvaluationMode
extends java.lang.Object

This class provides static constants for the query evaluation modes that db4o supports.

For detailed documentation please see QueryConfiguration.evaluationMode(QueryEvaluationMode)

Field Summary

Fields

Modifier and Type	Field	Description
static QueryEvaluationMode	IMMEDIATE	Constant for immediate query evaluation.
static QueryEvaluationMode	LAZY	Constant for lazy query evaluation.
static QueryEvaluationMode	SNAPSHOT	Constant for snapshot query evaluation.

Method Summary

Modifier and Type	Method	Description
int	asInt()	internal method, ignore please.
static QueryEvaluationMode	fromInt(int i)	internal method, ignore please.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

IMMEDIATE

public static final QueryEvaluationMode IMMEDIATE

Constant for immediate query evaluation. The query is executed fully when Query.execute() is called.

For detailed documentation please see QueryConfiguration.evaluationMode(QueryEvaluationMode)

SNAPSHOT

public static final QueryEvaluationMode SNAPSHOT

Constant for snapshot query evaluation. When Query.execute() is called, the query processor chooses the best indexes, does all index processing and creates a snapshot of the index at this point in time. Non-indexed constraints are evaluated lazily when the application iterates through the ObjectSet resultset of the query.

For detailed documentation please see QueryConfiguration.evaluationMode(QueryEvaluationMode)

LAZY

public static final QueryEvaluationMode LAZY

Constant for lazy query evaluation. When Query.execute() is called, the query processor only chooses the best index and creates an iterator on this index. Indexes and constraints are evaluated lazily when the application iterates through the ObjectSet resultset of the query.

For detailed documentation please see QueryConfiguration.evaluationMode(QueryEvaluationMode)

Method Detail

asInt

public int asInt()

internal method, ignore please.

fromInt

public static QueryEvaluationMode fromInt(int i)

internal method, ignore please.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object