Query (EclipseLink 2.6.4, API Reference)

All Known Subinterfaces:

JpaQuery<X>, StoredProcedureQuery, TypedQuery<X>
```
public interface Query
```
Interface used to control query execution.

See Also:
TypedQuery, StoredProcedureQuery, Parameter
Since:

Java Persistence 1.0

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`executeUpdate()` Execute an update or delete statement.
`int`	`getFirstResult()` The position of the first result the query object was set to retrieve.
`FlushModeType`	`getFlushMode()` Get the flush mode in effect for the query execution.
`java.util.Map<java.lang.String,java.lang.Object>`	`getHints()` Get the properties and hints and associated values that are in effect for the query instance.
`LockModeType`	`getLockMode()` Get the current lock mode for the query.
`int`	`getMaxResults()` The maximum number of results the query object was set to retrieve.
`Parameter<?>`	`getParameter(int position)` Get the parameter object corresponding to the declared positional parameter with the given position.
`<T> Parameter<T>`	`getParameter(int position, java.lang.Class<T> type)` Get the parameter object corresponding to the declared positional parameter with the given position and type.
`Parameter<?>`	`getParameter(java.lang.String name)` Get the parameter object corresponding to the declared parameter of the given name.
`<T> Parameter<T>`	`getParameter(java.lang.String name, java.lang.Class<T> type)` Get the parameter object corresponding to the declared parameter of the given name and type.
`java.util.Set<Parameter<?>>`	`getParameters()` Get the parameter objects corresponding to the declared parameters of the query.
`java.lang.Object`	`getParameterValue(int position)` Return the input value bound to the positional parameter.
`<T> T`	`getParameterValue(Parameter<T> param)` Return the input value bound to the parameter.
`java.lang.Object`	`getParameterValue(java.lang.String name)` Return the input value bound to the named parameter.
`java.util.List`	`getResultList()` Execute a SELECT query and return the query results as an untyped List.
`java.lang.Object`	`getSingleResult()` Execute a SELECT query that returns a single untyped result.
`boolean`	`isBound(Parameter<?> param)` Return a boolean indicating whether a value has been bound to the parameter.
`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(java.lang.String hintName, java.lang.Object value)` Set a query property or hint.
`Query`	`setLockMode(LockModeType lockMode)` Set the lock mode type to be used for the query execution.
`Query`	`setMaxResults(int maxResult)` Set the maximum number of results to retrieve.
`Query`	`setParameter(int position, java.util.Calendar value, TemporalType temporalType)` Bind an instance of `java.util.Calendar` to a positional parameter.
`Query`	`setParameter(int position, java.util.Date value, TemporalType temporalType)` Bind an instance of `java.util.Date` to a positional parameter.
`Query`	`setParameter(int position, java.lang.Object value)` Bind an argument value to a positional parameter.
`Query`	`setParameter(Parameter<java.util.Calendar> param, java.util.Calendar value, TemporalType temporalType)` Bind an instance of `java.util.Calendar` to a `Parameter` object.
`Query`	`setParameter(Parameter<java.util.Date> param, java.util.Date value, TemporalType temporalType)` Bind an instance of `java.util.Date` to a `Parameter` object.
`<T> Query`	`setParameter(Parameter<T> param, T value)` Bind the value of a `Parameter` object.
`Query`	`setParameter(java.lang.String name, java.util.Calendar value, TemporalType temporalType)` Bind an instance of `java.util.Calendar` to a named parameter.
`Query`	`setParameter(java.lang.String name, java.util.Date value, TemporalType temporalType)` Bind an instance of `java.util.Date` to a named parameter.
`Query`	`setParameter(java.lang.String name, java.lang.Object value)` Bind an argument value to a named parameter.
`<T> T`	`unwrap(java.lang.Class<T> cls)` Return an object of the specified type to allow access to the provider-specific API.

- Method Detail
  - getResultList
```
java.util.List getResultList()
```
    Execute a SELECT query and return the query results as an untyped List.
    
    Returns:
    a list of the results
    
    Throws:
    
    java.lang.IllegalStateException - if called for a Java Persistence query language UPDATE or DELETE statement
    
    QueryTimeoutException - if the query execution exceeds the query timeout value set and only the statement is rolled back
    
    TransactionRequiredException - if a lock mode other than NONE has been set and there is no transaction or the persistence context has not been joined to the transaction
    
    PessimisticLockException - if pessimistic locking fails and the transaction is rolled back
    
    LockTimeoutException - if pessimistic locking fails and only the statement is rolled back
    
    PersistenceException - if the query execution exceeds the query timeout value set and the transaction is rolled back
  - getSingleResult
```
java.lang.Object getSingleResult()
```
    Execute a SELECT query that returns a single untyped result.
    
    Returns:
    the result
    
    Throws:
    
    NoResultException - if there is no result
    
    NonUniqueResultException - if more than one result
    
    java.lang.IllegalStateException - if called for a Java Persistence query language UPDATE or DELETE statement
    
    QueryTimeoutException - if the query execution exceeds the query timeout value set and only the statement is rolled back
    
    TransactionRequiredException - if a lock mode other than NONE has been set and there is no transaction or the persistence context has not been joined to the transaction
    
    PessimisticLockException - if pessimistic locking fails and the transaction is rolled back
    
    LockTimeoutException - if pessimistic locking fails and only the statement is rolled back
    
    PersistenceException - if the query execution exceeds the query timeout value set and the transaction is rolled back
  - executeUpdate
```
int executeUpdate()
```
    Execute an update or delete statement.
    
    Returns:
    the number of entities updated or deleted
    
    Throws:
    
    java.lang.IllegalStateException - if called for a Java Persistence query language SELECT statement or for a criteria query
    
    TransactionRequiredException - if there is no transaction or the persistence context has not been joined to the transaction
    
    QueryTimeoutException - if the statement execution exceeds the query timeout value set and only the statement is rolled back
    
    PersistenceException - if the query execution exceeds the query timeout value set and the transaction is rolled back
  - setMaxResults
```
Query setMaxResults(int maxResult)
```
    Set the maximum number of results to retrieve.
    
    Parameters:
    maxResult - maximum number of results to retrieve
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the argument is negative
  - getMaxResults
```
int getMaxResults()
```
    The maximum number of results the query object was set to retrieve. Returns Integer.MAX_VALUE if setMaxResults was not applied to the query object.
    
    Returns:
    maximum number of results
    Since:
    
    Java Persistence 2.0
  - 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:
    
    java.lang.IllegalArgumentException - if the argument is negative
  - getFirstResult
```
int getFirstResult()
```
    The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object.
    
    Returns:
    position of the first result
    Since:
    
    Java Persistence 2.0
  - setHint
```
Query setHint(java.lang.String hintName,
            java.lang.Object value)
```
    Set a query property or hint. The hints elements may be used to specify query properties and hints. Properties defined by this specification must be observed by the provider. Vendor-specific hints that are not recognized by a provider must be silently ignored. Portable applications should not rely on the standard timeout hint. Depending on the database in use and the locking mechanisms used by the provider, this hint may or may not be observed.
    
    Parameters:
    hintName - name of the property or hint
    value - value for the property or hint
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the second argument is not valid for the implementation
  - getHints
```
java.util.Map<java.lang.String,java.lang.Object> getHints()
```
    Get the properties and hints and associated values that are in effect for the query instance.
    
    Returns:
    query properties and hints
    Since:
    
    Java Persistence 2.0
  - setParameter
```
<T> Query setParameter(Parameter<T> param,
                     T value)
```
    Bind the value of a Parameter object.
    
    Parameters:
    param - parameter object
    value - parameter value
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter does not correspond to a parameter of the query
    Since:
    
    Java Persistence 2.0
  - setParameter
```
Query setParameter(Parameter<java.util.Calendar> param,
                 java.util.Calendar value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Calendar to a Parameter object.
    
    Parameters:
    param - parameter object
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter does not correspond to a parameter of the query
    Since:
    
    Java Persistence 2.0
  - setParameter
```
Query setParameter(Parameter<java.util.Date> param,
                 java.util.Date value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Date to a Parameter object.
    
    Parameters:
    param - parameter object
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter does not correspond to a parameter of the query
    Since:
    
    Java Persistence 2.0
  - setParameter
```
Query setParameter(java.lang.String name,
                 java.lang.Object value)
```
    Bind an argument value to a named parameter.
    
    Parameters:
    name - parameter name
    value - parameter value
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter name does not correspond to a parameter of the query or if the argument is of incorrect type
  - setParameter
```
Query setParameter(java.lang.String name,
                 java.util.Calendar value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Calendar to a named parameter.
    
    Parameters:
    name - parameter name
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter name does not correspond to a parameter of the query or if the value argument is of incorrect type
  - setParameter
```
Query setParameter(java.lang.String name,
                 java.util.Date value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Date to a named parameter.
    
    Parameters:
    name - parameter name
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter name does not correspond to a parameter of the query or if the value argument is of incorrect type
  - setParameter
```
Query setParameter(int position,
                 java.lang.Object value)
```
    Bind an argument value to a positional parameter.
    
    Parameters:
    position - position
    value - parameter value
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if position does not correspond to a positional parameter of the query or if the argument is of incorrect type
  - setParameter
```
Query setParameter(int position,
                 java.util.Calendar value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Calendar to a positional parameter.
    
    Parameters:
    position - position
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if position does not correspond to a positional parameter of the query or if the value argument is of incorrect type
  - setParameter
```
Query setParameter(int position,
                 java.util.Date value,
                 TemporalType temporalType)
```
    Bind an instance of java.util.Date to a positional parameter.
    
    Parameters:
    position - position
    value - parameter value
    temporalType - temporal type
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalArgumentException - if position does not correspond to a positional parameter of the query or if the value argument is of incorrect type
  - getParameters
```
java.util.Set<Parameter<?>> getParameters()
```
    Get the parameter objects corresponding to the declared parameters of the query. Returns empty set if the query has no parameters. This method is not required to be supported for native queries.
    
    Returns:
    set of the parameter objects
    
    Throws:
    
    java.lang.IllegalStateException - if invoked on a native query when the implementation does not support this use
    Since:
    
    Java Persistence 2.0
  - getParameter
```
Parameter<?> getParameter(java.lang.String name)
```
    Get the parameter object corresponding to the declared parameter of the given name. This method is not required to be supported for native queries.
    
    Parameters:
    name - parameter name
    
    Returns:
    parameter object
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter of the specified name does not exist
    
    java.lang.IllegalStateException - if invoked on a native query when the implementation does not support this use
    Since:
    
    Java Persistence 2.0
  - getParameter
```
<T> Parameter<T> getParameter(java.lang.String name,
                            java.lang.Class<T> type)
```
    Get the parameter object corresponding to the declared parameter of the given name and type. This method is required to be supported for criteria queries only.
    
    Parameters:
    name - parameter name
    type - type
    
    Returns:
    parameter object
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter of the specified name does not exist or is not assignable to the type
    
    java.lang.IllegalStateException - if invoked on a native query or Java Persistence query language query when the implementation does not support this use
    Since:
    
    Java Persistence 2.0
  - getParameter
```
Parameter<?> getParameter(int position)
```
    Get the parameter object corresponding to the declared positional parameter with the given position. This method is not required to be supported for native queries.
    
    Parameters:
    position - position
    
    Returns:
    parameter object
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter with the specified position does not exist
    
    java.lang.IllegalStateException - if invoked on a native query when the implementation does not support this use
    Since:
    
    Java Persistence 2.0
  - getParameter
```
<T> Parameter<T> getParameter(int position,
                            java.lang.Class<T> type)
```
    Get the parameter object corresponding to the declared positional parameter with the given position and type. This method is not required to be supported by the provider.
    
    Parameters:
    position - position
    type - type
    
    Returns:
    parameter object
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter with the specified position does not exist or is not assignable to the type
    
    java.lang.IllegalStateException - if invoked on a native query or Java Persistence query language query when the implementation does not support this use
    Since:
    
    Java Persistence 2.0
  - isBound
```
boolean isBound(Parameter<?> param)
```
    Return a boolean indicating whether a value has been bound to the parameter.
    
    Parameters:
    param - parameter object
    
    Returns:
    boolean indicating whether parameter has been bound
    Since:
    
    Java Persistence 2.0
  - getParameterValue
```
<T> T getParameterValue(Parameter<T> param)
```
    Return the input value bound to the parameter. (Note that OUT parameters are unbound.)
    
    Parameters:
    param - parameter object
    
    Returns:
    parameter value
    
    Throws:
    
    java.lang.IllegalArgumentException - if the parameter is not a parameter of the query
    
    java.lang.IllegalStateException - if the parameter has not been been bound
    Since:
    
    Java Persistence 2.0
  - getParameterValue
```
java.lang.Object getParameterValue(java.lang.String name)
```
    Return the input value bound to the named parameter. (Note that OUT parameters are unbound.)
    
    Parameters:
    name - parameter name
    
    Returns:
    parameter value
    
    Throws:
    
    java.lang.IllegalStateException - if the parameter has not been been bound
    
    java.lang.IllegalArgumentException - if the parameter of the specified name does not exist
    Since:
    
    Java Persistence 2.0
  - getParameterValue
```
java.lang.Object getParameterValue(int position)
```
    Return the input value bound to the positional parameter. (Note that OUT parameters are unbound.)
    
    Parameters:
    position - position
    
    Returns:
    parameter value
    
    Throws:
    
    java.lang.IllegalStateException - if the parameter has not been been bound
    
    java.lang.IllegalArgumentException - if the parameter with the specified position does not exist
    Since:
    
    Java Persistence 2.0
  - 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 - flush mode
    
    Returns:
    the same query instance
  - getFlushMode
```
FlushModeType getFlushMode()
```
    Get the flush mode in effect for the query execution. If a flush mode has not been set for the query object, returns the flush mode in effect for the entity manager.
    
    Returns:
    flush mode
    Since:
    
    Java Persistence 2.0
  - setLockMode
```
Query setLockMode(LockModeType lockMode)
```
    Set the lock mode type to be used for the query execution.
    
    Parameters:
    lockMode - lock mode
    
    Returns:
    the same query instance
    
    Throws:
    
    java.lang.IllegalStateException - if the query is found not to be a Java Persistence query language SELECT query or a CriteriaQuery query
    Since:
    
    Java Persistence 2.0
  - getLockMode
```
LockModeType getLockMode()
```
    Get the current lock mode for the query. Returns null if a lock mode has not been set on the query object.
    
    Returns:
    lock mode
    
    Throws:
    
    java.lang.IllegalStateException - if the query is found not to be a Java Persistence query language SELECT query or a Criteria API query
    Since:
    
    Java Persistence 2.0
  - unwrap
```
<T> T unwrap(java.lang.Class<T> cls)
```
    Return an object of the specified type to allow access to the provider-specific API. If the provider's query implementation does not support the specified class, the PersistenceException is thrown.
    
    Parameters:
    cls - the class of the object to be returned. This is normally either the underlying query implementation class or an interface that it implements.
    
    Returns:
    an instance of the specified class
    
    Throws:
    
    PersistenceException - if the provider does not support the call
    Since:
    
    Java Persistence 2.0

Interface Query

Method Summary

Method Detail

getResultList

getSingleResult

executeUpdate

setMaxResults

getMaxResults

setFirstResult

getFirstResult

setHint

getHints

setParameter

setParameter

setParameter

setParameter

setParameter

setParameter

setParameter

setParameter

setParameter

getParameters

getParameter

getParameter

getParameter

getParameter

isBound

getParameterValue

getParameterValue

getParameterValue

setFlushMode

getFlushMode

setLockMode

getLockMode

unwrap