Package de.espirit.or.query

Interface Select

All Superinterfaces:

Cloneable, Serializable

public interface Select
extends Cloneable, Serializable

Model representing a Select statement to query entites from an or session. A Select is related to one entityType and can be created via Session.createSelect(entityTypeName) with the name of the entity type.

Since:

4.0.17

See Also:

• Session.executeQuery(Select)
• Session.createSelect(String)

Method Summary

Modifier and Type	Method	Description
void	add(@NotNull Order order)	Appends the given order criteria to the list of defined orders of this select.
void	add(@NotNull Parameter parameter)	Adds the given parameter to this select.
Select	applyLanguage(@NotNull String languageAbbreviation)	Make a clone of this select and replace all place holders %lang% contained in constaints with the given languageAbbreviation
void	clearOrdering()	Clears the defined order criterias of this select.
boolean	containsParameter(@NotNull String identifier)	Indicates whether a parameter specified by the given identifier exists or not.
@NotNull Optional<String>	getAppliedLanguage()	Get the current language applied to this select, if available.
@Nullable Constraint	getConstraint()	Return the constraint defined by this select.
String	getEntityTypeName()	Return the name of the entity type which entities in the result set belong to.
List<de.espirit.or.query.FetchMode>	getFetchModes()	Returns all fetch modes defined by this select.
int	getFetchSize()	Return the fetch size which will applied to the JDBC ResultSet to retrieve data from the database.
int	getMaxResultCount()	The maximum number of entities this select will return.
@NotNull List<Order>	getOrders()	Returns an unmodifiable list of defined orders of this select.
Parameter	getParameter(@NotNull String identifier)	Return the parameter with the given identifier.
Collection<Parameter>	getParameters()	Return all parameters defined by this select.
Object	getParameterValue(@NotNull String identifier)	Returns the value of the parameter specified by given identifier or null if no parameter exists with the given identifier.
String	getXML()	Returns the xml representation of this select model.
boolean	isDeprecated()	Return true if this select is constructed from a 3.1 query document.
boolean	isOrdered(@NotNull String attributeName)	Return true if an order of the attribute attributeName is already defined in this select.
void	setConstraint(Constraint constraint)	Set the select constraint to constraint.
void	setDeprecated(boolean flag)	Set this select to deprecated or not.
void	setFetchSize(int size)	Sets the fetch size for this select which will be applied to the result EntityList returned by executeQuery(Select).
void	setMaxResultCount(int maxResultCount)	Set the maximum number of entities this select will return.
void	setParameter(@NotNull String identifier, Object value)	Sets the value for the parameter specified by the given identifier.

Method Details

isDeprecated

boolean isDeprecated()

Return true if this select is constructed from a 3.1 query document.

Since:

4.0.17

setDeprecated

void setDeprecated(boolean flag)

Set this select to deprecated or not. A deprcated select is the one was constructed from a 3.1 query.

Since:

4.0.17

getEntityTypeName

String getEntityTypeName()

Return the name of the entity type which entities in the result set belong to. Each select produces results from one entity type (table) even more than one entity types can be involved in the constraint of the select.

Since:

4.0.17

setConstraint

void setConstraint(Constraint constraint)
            throws ORException

Set the select constraint to constraint.

Throws:

ORException

Since:

4.0.17

getConstraint

@Nullable
@Nullable Constraint getConstraint()

Return the constraint defined by this select.

Since:

4.0.17

getParameter

Parameter getParameter(@NotNull
 @NotNull String identifier)
                throws ORException

Return the parameter with the given identifier.

Throws:

ORException

Since:

4.0.17

getParameters

Collection<Parameter> getParameters()

Return all parameters defined by this select.

Since:

4.0.17

See Also:

• add(Parameter)

add

void add(@NotNull
 @NotNull Parameter parameter)

Adds the given parameter to this select.

Since:

4.0.17

See Also:

• getParameters()

getFetchModes

List<de.espirit.or.query.FetchMode> getFetchModes()

Returns all fetch modes defined by this select.

Since:

4.0.17

getParameterValue

Object getParameterValue(@NotNull
 @NotNull String identifier)

Returns the value of the parameter specified by given identifier or null if no parameter exists with the given identifier.

Since:

4.0.17

See Also:

• setParameter(String, Object)
• add(Parameter)

setParameter

void setParameter(@NotNull
 @NotNull String identifier,
 Object value)
           throws ORException

Sets the value for the parameter specified by the given identifier. The given value must match the value class of the parameter. The parameter needs to be registered with add(Parameter) first.

Throws:

IllegalArgumentException - if no parameter exists with the given identifier

ORException

Since:

4.0.17

See Also:

• add(Parameter)

getOrders

@NotNull
@NotNull List<Order> getOrders()

Returns an unmodifiable list of defined orders of this select. The sequence of the list defines the priority of the ordering.

Since:

4.0.17

See Also:

• add(Order)
• clearOrdering()

isOrdered

boolean isOrdered(@NotNull
 @NotNull String attributeName)

Return true if an order of the attribute attributeName is already defined in this select.

Since:

4.0.30

add

void add(@NotNull
 @NotNull Order order)

Appends the given order criteria to the list of defined orders of this select.

Since:

4.0.17

See Also:

• getOrders()
• clearOrdering()

setFetchSize

void setFetchSize(int size)

Sets the fetch size for this select which will be applied to the result EntityList returned by executeQuery(Select). The given fetchsize defines the block size of the EntityList which is a lazy list and queries its data in blocks of a specific size. The given fetch size defines the block size of the entity list. If fetch size is not specified the default block size (40 items) will be used for the query result, which is suited for the most use cases.

Since:

4.0.17

See Also:

• getFetchSize()

getFetchSize

int getFetchSize()

Return the fetch size which will applied to the JDBC ResultSet to retrieve data from the database.

Since:

4.0.17

See Also:

• setFetchSize(int)

getXML

String getXML()

Returns the xml representation of this select model.

Since:

4.0.17

clearOrdering

void clearOrdering()

Clears the defined order criterias of this select.

Since:

4.0.17

See Also:

• add(Order)
• getOrders()

containsParameter

boolean containsParameter(@NotNull
 @NotNull String identifier)

Indicates whether a parameter specified by the given identifier exists or not.

Returns:

true if a parameter specified by the given identifier exists, false otherwise

Since:

4.0.17

getMaxResultCount

int getMaxResultCount()

The maximum number of entities this select will return. A value of 0 means no restriction (default).

Since:

4.0.19

See Also:

• setMaxResultCount(int)

setMaxResultCount

void setMaxResultCount(int maxResultCount)

Set the maximum number of entities this select will return. A value of 0 means no restriction (default).

Since:

4.0.19

See Also:

• getMaxResultCount()

applyLanguage

Select applyLanguage(@NotNull
 @NotNull String languageAbbreviation)

Make a clone of this select and replace all place holders %lang% contained in constaints with the given languageAbbreviation

Returns:

the clone of this select for the language languageAbbreviation

Since:

4.0.26

getAppliedLanguage

@Experimental
@NotNull
@NotNull Optional<String> getAppliedLanguage()

Get the current language applied to this select, if available.

Returns:

The language abbreviation if available.

Since:

5.2.250604