Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.sessions

Class SimpleResultSetRecord

java.lang.Object

org.eclipse.persistence.internal.core.sessions.CoreAbstractRecord

org.eclipse.persistence.internal.sessions.AbstractRecord

org.eclipse.persistence.sessions.DatabaseRecord

org.eclipse.persistence.internal.sessions.ArrayRecord

org.eclipse.persistence.internal.sessions.ResultSetRecord

org.eclipse.persistence.internal.sessions.SimpleResultSetRecord

All Implemented Interfaces:

Serializable, Cloneable, Map, DataRecord

public class SimpleResultSetRecord
extends ResultSetRecord

PERF: Record used by ObjectLevelReadQuery ResultSet optimization. This is a subclass of ResultSetRecord that's used with simple descriptors (descriptor.getObjectBuilder().isSimple()) - those having only DirectToField mappings. In this case the record is not cached by any mapping therefore could be reused in ReadAllQuery - (which calls resultSet.next()). In case the cached object used instead of creating a new one from the record, the not needed fields' values are never obtained from resultSet (that's especially important for expensive LOBs). If alternatively the record is used to populate an object then all the values obtained from resultSet are nullified after use.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.persistence.internal.sessions.AbstractRecord

AbstractRecord.EntrySet, AbstractRecord.KeySet, AbstractRecord.NoEntry, AbstractRecord.RecordEntry, AbstractRecord.RecordEntryIterator, AbstractRecord.RecordKeyIterator, AbstractRecord.RecordValuesIterator, AbstractRecord.ValuesSet

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isPopulatingObject	Indicates that the whole object is being populated.
protected boolean	shouldKeepValues	Indicates whether the values requested while populating object (isPopulatingObject == true) should be saved in valuesArray
protected boolean	shouldUseOptimization	Indicates whether to use optimization while getting values from result set instead of calling accessor.getObject method.

Fields inherited from class org.eclipse.persistence.internal.sessions.ResultSetRecord

accessor, metaData, optimizeData, platform, resultSet, session

Fields inherited from class org.eclipse.persistence.internal.sessions.ArrayRecord

fieldsArray, valuesArray

Fields inherited from class org.eclipse.persistence.internal.sessions.AbstractRecord

fields, lookupField, noEntry, nullValueInFields, size, sopObject, values

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SimpleResultSetRecord()
	SimpleResultSetRecord(Vector fields, DatabaseField[] fieldsArray, ResultSet resultSet, ResultSetMetaData metaData, DatabaseAccessor accessor, AbstractSession session, DatabasePlatform platform, boolean optimizeData)

Method Summary

Modifier and Type	Method	Description
Object	get(DatabaseField key)	INTERNAL: Retrieve the value for the field.
Object	getIndicatingNoEntry(DatabaseField key)	INTERNAL: Retrieve the value for the field.
protected Object	getValueFromResultSet(int index, DatabaseField field)
boolean	hasValues()
boolean	isPopulatingObject()
void	loadAllValuesFromResultSet()	Obtains all the value from resultSet and removes it.
void	reset()
void	setShouldKeepValues(boolean shouldKeepValues)
void	setShouldUseOptimization(boolean shouldUseOptimization)
void	setSopObject(Object sopObject)	INTERNAL:
boolean	shouldKeepValues()
boolean	shouldUseOptimization()
protected String	toStringAditional()

Methods inherited from class org.eclipse.persistence.internal.sessions.ResultSetRecord

checkValues, clear, containsValue, hasResultSet, removAllValue, removeNonIndirectionValues, removeResultSet

Methods inherited from class org.eclipse.persistence.internal.sessions.ArrayRecord

add, clone, containsKey, getField, getFields, getValues, put, remove, replaceAt, replaceAt, setFields, setValues, size, toString

Methods inherited from class org.eclipse.persistence.internal.sessions.AbstractRecord

contains, containsKey, containsKey, elements, entrySet, get, get, getIndicatingNoEntry, getLookupField, getSopObject, getValues, getValues, hasNullValueInFields, hasSopObject, isEmpty, keys, keySet, mergeFrom, put, put, putAll, remove, remove, resetSize, setNullValueInFields, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Details

shouldKeepValues

protected transient boolean shouldKeepValues

Indicates whether the values requested while populating object (isPopulatingObject == true) should be saved in valuesArray

shouldUseOptimization

protected transient boolean shouldUseOptimization

Indicates whether to use optimization while getting values from result set instead of calling accessor.getObject method.

isPopulatingObject

protected transient boolean isPopulatingObject

Indicates that the whole object is being populated. At first the primary key is extracted from the row - to see if the object with the same pk is already in the cache. Then in case of refresh the locking field value is extracted, too. Indication of the object being populated from the record (looping through all the mappings) is request for a value, which has been already returned before (usually primary key, but may be version). At this point the flag is set to true.

Constructor Details

SimpleResultSetRecord

protected SimpleResultSetRecord()

SimpleResultSetRecord

public SimpleResultSetRecord(Vector fields,
 DatabaseField[] fieldsArray,
 ResultSet resultSet,
 ResultSetMetaData metaData,
 DatabaseAccessor accessor,
 AbstractSession session,
 DatabasePlatform platform,
 boolean optimizeData)

Method Details

loadAllValuesFromResultSet

public void loadAllValuesFromResultSet()

Obtains all the value from resultSet and removes it. resultSet must be non null.

Overrides:

loadAllValuesFromResultSet in class ResultSetRecord

get

public Object get(DatabaseField key)

INTERNAL: Retrieve the value for the field. If missing null is returned.

Overrides:

get in class ResultSetRecord

getIndicatingNoEntry

public Object getIndicatingNoEntry(DatabaseField key)

INTERNAL: Retrieve the value for the field. If missing DatabaseRow.noEntry is returned. PERF: This method is a clone of get() for performance.

Overrides:

getIndicatingNoEntry in class ResultSetRecord

getValueFromResultSet

protected Object getValueFromResultSet(int index,
 DatabaseField field)

reset

public void reset()

shouldKeepValues

public boolean shouldKeepValues()

setShouldKeepValues

public void setShouldKeepValues(boolean shouldKeepValues)

shouldUseOptimization

public boolean shouldUseOptimization()

setShouldUseOptimization

public void setShouldUseOptimization(boolean shouldUseOptimization)

hasValues

public boolean hasValues()

isPopulatingObject

public boolean isPopulatingObject()

toStringAditional

protected String toStringAditional()

Overrides:

toStringAditional in class ResultSetRecord

setSopObject

public void setSopObject(Object sopObject)

Description copied from class: AbstractRecord

INTERNAL:

Overrides:

setSopObject in class ResultSetRecord