javax.persistence

Interface Query

public interface Query

Interface used to control query execution.

Method Summary

Methods

Modifier and Type	Method and Description
int	executeUpdate() Execute an update or delete statement.
List	getResultList() Execute the query and return the query results as a List.
Object	getSingleResult() Execute a SELECT query that returns a single result.
Query	setFirstResult(int startPosition) Set the position of the first result to retrieve.
Query	setFlushMode(FlushModeType flushMode) Set the flush mode type to be used for the query execution.
Query	setHint(String hintName, Object value) Set an implementation-specific hint.
Query	setMaxResults(int maxResult) Set the maximum number of results to retrieve.
Query	setParameter(int position, Calendar value, TemporalType temporalType) Bind an instance of java.util.Calendar to a positional parameter.
Query	setParameter(int position, Date value, TemporalType temporalType) Bind an instance of java.util.Date to a positional parameter.
Query	setParameter(int position, Object value) Bind an argument to a positional parameter.
Query	setParameter(String name, Calendar value, TemporalType temporalType) Bind an instance of java.util.Calendar to a named parameter.
Query	setParameter(String name, Date value, TemporalType temporalType) Bind an instance of java.util.Date to a named parameter.
Query	setParameter(String name, Object value) Bind an argument to a named parameter.

Method Detail

getResultList

List getResultList()

Execute the query and return the query results as a List.

Returns:

a list of the results

Throws:

IllegalStateException - f called for a Java Persistence query language UPDATE or DELETE statement

getSingleResult

Object getSingleResult()

Execute a SELECT query that returns a single result.

Returns:

the result

Throws:

NoResultException - if there is no result

NonUniqueResultException - if more than one result

IllegalStateException - if called for a Java Persistence query language UPDATE or DELETE statement

executeUpdate

int executeUpdate()

Execute an update or delete statement.

Returns:

the number of entities updated or deleted

Throws:

IllegalStateException - if called for a Java Persistence query language SELECT statement

TransactionRequiredException - if there is no transaction

setMaxResults

Query setMaxResults(int maxResult)

Set the maximum number of results to retrieve.

Parameters:

maxResult -

Returns:

the same query instance

Throws:

IllegalArgumentException - if argument is negative

setFirstResult

Query setFirstResult(int startPosition)

Set the position of the first result to retrieve.

Parameters:

startPosition - position of the first result, numbered from 0

Returns:

the same query instance

Throws:

IllegalArgumentException - if argument is negative

setHint

Query setHint(String hintName,
            Object value)

Set an implementation-specific hint. If the hint name is not recognized, it is silently ignored.

Parameters:

hintName -

value -

Returns:

the same query instance

Throws:

IllegalArgumentException - if the second argument is not valid for the implementation

setParameter

Query setParameter(String name,
                 Object value)

Bind an argument to a named parameter.

Parameters:

name - the parameter name

value -

Returns:

the same query instance

Throws:

IllegalArgumentException - if parameter name does not correspond to parameter in query string or argument is of incorrect type

setParameter

Query setParameter(String name,
                 Date value,
                 TemporalType temporalType)

Bind an instance of java.util.Date to a named parameter.

Parameters:

name -

value -

temporalType -

Returns:

the same query instance

Throws:

IllegalArgumentException - if parameter name does not correspond to parameter in query string

setParameter

Query setParameter(String name,
                 Calendar value,
                 TemporalType temporalType)

Bind an instance of java.util.Calendar to a named parameter.

Parameters:

name -

value -

temporalType -

Returns:

the same query instance

Throws:

IllegalArgumentException - if parameter name does not correspond to parameter in query string

setParameter

Query setParameter(int position,
                 Object value)

Bind an argument to a positional parameter.

Parameters:

position -

value -

Returns:

the same query instance

Throws:

IllegalArgumentException - if position does not correspond to positional parameter of query or argument is of incorrect type

setParameter

Query setParameter(int position,
                 Date value,
                 TemporalType temporalType)

Bind an instance of java.util.Date to a positional parameter.

Parameters:

position -

value -

temporalType -

Returns:

the same query instance

Throws:

IllegalArgumentException - if position does not correspond to positional parameter of query

setParameter

Query setParameter(int position,
                 Calendar value,
                 TemporalType temporalType)

Bind an instance of java.util.Calendar to a positional parameter.

Parameters:

position -

value -

temporalType -

Returns:

the same query instance } correspond to positional parameter of query

setFlushMode

Query setFlushMode(FlushModeType flushMode)

Set the flush mode type to be used for the query execution. The flush mode type applies to the query regardless of the flush mode type in use for the entity manager.

Parameters:

flushMode -