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// $Id: Query.java 11282 2007-03-14 22:05:59Z epbernard $
package javax.persistence;

import java.util.Calendar;
import java.util.Date;
import java.util.List;


/**
 * Interface used to control query execution.
 */
public interface Query
{
   /**
    * Execute the query and return the query results as a List.
    *
    * @return a list of the results
    * @throws IllegalStateException f called for a Java Persistence query language UPDATE or DELETE statement
    */
   public List getResultList();

   /**
    * Execute a SELECT query that returns a single 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
    */
   public 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
    * @throws TransactionRequiredException if there is no transaction
    */
   public int executeUpdate();

   /**
    * Set the maximum number of results to retrieve.
    *
    * @param maxResult
    * @return the same query instance
    * @throws IllegalArgumentException if argument is negative
    */
   public Query setMaxResults(int maxResult);

   /**
    * 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 argument is negative
    */
   public Query setFirstResult(int startPosition);

   /**
    * Set an implementation-specific hint. If the hint name is not recognized, it is silently
    * ignored.
    *
    * @param hintName
    * @param value
    * @return the same query instance
    * @throws IllegalArgumentException if the second argument is not valid for the implementation
    */
   public Query setHint(String hintName, Object value);

   /**
    * Bind an argument to a named parameter.
    *
    * @param name  the parameter name
    * @param value
    * @return the same query instance
    * @throws IllegalArgumentException if parameter name does not correspond to parameter in query
    *                                  string or argument is of incorrect type
    */
   public Query setParameter(String name, Object value);

   /**
    * Bind an instance of java.util.Date to a named parameter.
    *
    * @param name
    * @param value
    * @param temporalType
    * @return the same query instance
    * @throws IllegalArgumentException if parameter name does not correspond to parameter in query
    *                                  string
    */
   public Query setParameter(String name, Date value, TemporalType temporalType);

   /**
    * Bind an instance of java.util.Calendar to a named parameter.
    *
    * @param name
    * @param value
    * @param temporalType
    * @return the same query instance
    * @throws IllegalArgumentException if parameter name does not correspond to parameter in query
    *                                  string
    */
   public Query setParameter(String name, Calendar value, TemporalType temporalType);

   /**
    * Bind an argument to a positional parameter.
    *
    * @param position
    * @param value
    * @return the same query instance
    * @throws IllegalArgumentException if position does not correspond to positional parameter of
    *                                  query or argument is of incorrect type
    */
   public Query setParameter(int position, Object value);

   /**
    * Bind an instance of java.util.Date to a positional parameter.
    *
    * @param position
    * @param value
    * @param temporalType
    * @return the same query instance
    * @throws IllegalArgumentException if position does not correspond to positional parameter of
    *                                  query
    */
   public Query setParameter(int position, Date value, TemporalType temporalType);

   /**
    * Bind an instance of java.util.Calendar to a positional parameter.
    *
    * @param position
    * @param value
    * @param temporalType
    * @return the same query instance } correspond to positional parameter of query
    */
   public Query setParameter(int position, Calendar value, TemporalType temporalType);

   /**
    * 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
    */
   public Query setFlushMode(FlushModeType flushMode);

}