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/*******************************************************************************
* Copyright (c) 2008 - 2017 Oracle Corporation. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Lukas Jungmann - Java Persistence 2.2
* Linda DeMichiel - Java Persistence 2.1
* Linda DeMichiel - Java Persistence 2.0
*
******************************************************************************/
package javax.persistence;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Set;
import java.util.Map;
import java.util.stream.Stream;
/**
* Interface used to control query execution.
*
* @see TypedQuery
* @see StoredProcedureQuery
* @see Parameter
*
* @since Java Persistence 1.0
*/
public interface Query {
/**
* Execute a SELECT query and return the query results
* as an untyped List.
* @return a list of the results
* @throws IllegalStateException if called for a Java
* Persistence query language UPDATE or DELETE statement
* @throws QueryTimeoutException if the query execution exceeds
* the query timeout value set and only the statement is
* rolled back
* @throws 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
* @throws PessimisticLockException if pessimistic locking
* fails and the transaction is rolled back
* @throws LockTimeoutException if pessimistic locking
* fails and only the statement is rolled back
* @throws PersistenceException if the query execution exceeds
* the query timeout value set and the transaction
* is rolled back
*/
List getResultList();
/**
* Execute a SELECT query and return the query results
* as an untyped java.util.stream.Stream.
* By default this method delegates to getResultList().stream(),
* however persistence provider may choose to override this method
* to provide additional capabilities.
*
* @return a stream of the results
* @throws IllegalStateException if called for a Java
* Persistence query language UPDATE or DELETE statement
* @throws QueryTimeoutException if the query execution exceeds
* the query timeout value set and only the statement is
* rolled back
* @throws 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
* @throws PessimisticLockException if pessimistic locking
* fails and the transaction is rolled back
* @throws LockTimeoutException if pessimistic locking
* fails and only the statement is rolled back
* @throws PersistenceException if the query execution exceeds
* the query timeout value set and the transaction
* is rolled back
* @see Stream
* @see #getResultList()
* @since 2.2
*/
default Stream getResultStream() {
return getResultList().stream();
}
/**
* Execute a SELECT query that returns a single untyped result.
* @return the result
* @throws NoResultException if there is no result
* @throws NonUniqueResultException if more than one result
* @throws IllegalStateException if called for a Java
* Persistence query language UPDATE or DELETE statement
* @throws QueryTimeoutException if the query execution exceeds
* the query timeout value set and only the statement is
* rolled back
* @throws 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
* @throws PessimisticLockException if pessimistic locking
* fails and the transaction is rolled back
* @throws LockTimeoutException if pessimistic locking
* fails and only the statement is rolled back
* @throws PersistenceException if the query execution exceeds
* the query timeout value set and the transaction
* is rolled back
*/
Object getSingleResult();
/**
* Execute an update or delete statement.
* @return the number of entities updated or deleted
* @throws IllegalStateException if called for a Java
* Persistence query language SELECT statement or for
* a criteria query
* @throws TransactionRequiredException if there is
* no transaction or the persistence context has not
* been joined to the transaction
* @throws QueryTimeoutException if the statement execution
* exceeds the query timeout value set and only
* the statement is rolled back
* @throws PersistenceException if the query execution exceeds
* the query timeout value set and the transaction
* is rolled back
*/
int executeUpdate();
/**
* Set the maximum number of results to retrieve.
* @param maxResult maximum number of results to retrieve
* @return the same query instance
* @throws IllegalArgumentException if the argument is negative
*/
Query setMaxResults(int maxResult);
/**
* 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.
* @return maximum number of results
* @since Java Persistence 2.0
*/
int getMaxResults();
/**
* Set the position of the first result to retrieve.
* @param startPosition position of the first result,
* numbered from 0
* @return the same query instance
* @throws IllegalArgumentException if the argument is negative
*/
Query setFirstResult(int startPosition);
/**
* The position of the first result the query object was set to
* retrieve. Returns 0 if setFirstResult was not applied to the
* query object.
* @return position of the first result
* @since Java Persistence 2.0
*/
int getFirstResult();
/**
* 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.
* @param hintName name of the property or hint
* @param value value for the property or hint
* @return the same query instance
* @throws IllegalArgumentException if the second argument is not
* valid for the implementation
*/
Query setHint(String hintName, Object value);
/**
* Get the properties and hints and associated values that are
* in effect for the query instance.
* @return query properties and hints
* @since Java Persistence 2.0
*/
Map getHints();
/**
* Bind the value of a Parameter object.
* @param param parameter object
* @param value parameter value
* @return the same query instance
* @throws IllegalArgumentException if the parameter
* does not correspond to a parameter of the
* query
* @since Java Persistence 2.0
*/
Query setParameter(Parameter param, T value);
/**
* Bind an instance of java.util.Calendar to a Parameter object.
* @param param parameter object
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if the parameter does not
* correspond to a parameter of the query
* @since Java Persistence 2.0
*/
Query setParameter(Parameter param, Calendar value,
TemporalType temporalType);
/**
* Bind an instance of java.util.Date to a Parameter object.
* @param param parameter object
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if the parameter does not
* correspond to a parameter of the query
* @since Java Persistence 2.0
*/
Query setParameter(Parameter param, Date value,
TemporalType temporalType);
/**
* Bind an argument value to a named parameter.
* @param name parameter name
* @param value parameter value
* @return the same query instance
* @throws IllegalArgumentException if the parameter name does
* not correspond to a parameter of the query or if
* the argument is of incorrect type
*/
Query setParameter(String name, Object value);
/**
* Bind an instance of java.util.Calendar to a named parameter.
* @param name parameter name
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if the parameter name does
* not correspond to a parameter of the query or if
* the value argument is of incorrect type
*/
Query setParameter(String name, Calendar value,
TemporalType temporalType);
/**
* Bind an instance of java.util.Date to a named parameter.
* @param name parameter name
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if the parameter name does
* not correspond to a parameter of the query or if
* the value argument is of incorrect type
*/
Query setParameter(String name, Date value,
TemporalType temporalType);
/**
* Bind an argument value to a positional parameter.
* @param position position
* @param value parameter value
* @return the same query instance
* @throws IllegalArgumentException if position does not
* correspond to a positional parameter of the
* query or if the argument is of incorrect type
*/
Query setParameter(int position, Object value);
/**
* Bind an instance of java.util.Calendar to a positional
* parameter.
* @param position position
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if position does not
* correspond to a positional parameter of the query or
* if the value argument is of incorrect type
*/
Query setParameter(int position, Calendar value,
TemporalType temporalType);
/**
* Bind an instance of java.util.Date to a positional parameter.
* @param position position
* @param value parameter value
* @param temporalType temporal type
* @return the same query instance
* @throws IllegalArgumentException if position does not
* correspond to a positional parameter of the query or
* if the value argument is of incorrect type
*/
Query setParameter(int position, Date value,
TemporalType temporalType);
/**
* 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.
* @return set of the parameter objects
* @throws IllegalStateException if invoked on a native
* query when the implementation does not support
* this use
* @since Java Persistence 2.0
*/
Set> getParameters();
/**
* Get the parameter object corresponding to the declared
* parameter of the given name.
* This method is not required to be supported for native
* queries.
* @param name parameter name
* @return parameter object
* @throws IllegalArgumentException if the parameter of the
* specified name does not exist
* @throws IllegalStateException if invoked on a native
* query when the implementation does not support
* this use
* @since Java Persistence 2.0
*/
Parameter getParameter(String name);
/**
* 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.
* @param name parameter name
* @param type type
* @return parameter object
* @throws IllegalArgumentException if the parameter of the
* specified name does not exist or is not assignable
* to the type
* @throws 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
*/
Parameter getParameter(String name, Class type);
/**
* 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.
* @param position position
* @return parameter object
* @throws IllegalArgumentException if the parameter with the
* specified position does not exist
* @throws IllegalStateException if invoked on a native
* query when the implementation does not support
* this use
* @since Java Persistence 2.0
*/
Parameter getParameter(int position);
/**
* 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.
* @param position position
* @param type type
* @return parameter object
* @throws IllegalArgumentException if the parameter with the
* specified position does not exist or is not assignable
* to the type
* @throws 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
*/
Parameter getParameter(int position, Class type);
/**
* Return a boolean indicating whether a value has been bound
* to the parameter.
* @param param parameter object
* @return boolean indicating whether parameter has been bound
* @since Java Persistence 2.0
*/
boolean isBound(Parameter param);
/**
* Return the input value bound to the parameter.
* (Note that OUT parameters are unbound.)
* @param param parameter object
* @return parameter value
* @throws IllegalArgumentException if the parameter is not
* a parameter of the query
* @throws IllegalStateException if the parameter has not been
* been bound
* @since Java Persistence 2.0
*/
T getParameterValue(Parameter param);
/**
* Return the input value bound to the named parameter.
* (Note that OUT parameters are unbound.)
* @param name parameter name
* @return parameter value
* @throws IllegalStateException if the parameter has not been
* been bound
* @throws IllegalArgumentException if the parameter of the
* specified name does not exist
* @since Java Persistence 2.0
*/
Object getParameterValue(String name);
/**
* Return the input value bound to the positional parameter.
* (Note that OUT parameters are unbound.)
* @param position position
* @return parameter value
* @throws IllegalStateException if the parameter has not been
* been bound
* @throws IllegalArgumentException if the parameter with the
* specified position does not exist
* @since Java Persistence 2.0
*/
Object getParameterValue(int position);
/**
* 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.
* @param flushMode flush mode
* @return the same query instance
*/
Query setFlushMode(FlushModeType flushMode);
/**
* 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.
* @return flush mode
* @since Java Persistence 2.0
*/
FlushModeType getFlushMode();
/**
* Set the lock mode type to be used for the query execution.
* @param lockMode lock mode
* @return the same query instance
* @throws 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
*/
Query setLockMode(LockModeType lockMode);
/**
* Get the current lock mode for the query. Returns null if a lock
* mode has not been set on the query object.
* @return lock mode
* @throws 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
*/
LockModeType getLockMode();
/**
* 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.
* @param cls the class of the object to be returned. This is
* normally either the underlying query
* implementation class or an interface that it
* implements.
* @return an instance of the specified class
* @throws PersistenceException if the provider does not support
* the call
* @since Java Persistence 2.0
*/
T unwrap(Class cls);
}