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Parameter.java
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Parameter.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
* version.
* <p>
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model.query;
/**
* Type for query parameter objects.
*
* @param <T>
* the type of the parameter
*/
public interface Parameter<T> {
/**
* Return the parameter name, or null if the parameter is not a named
* parameter or no name has been assigned.
*
* @return parameter name
*/
String getName();
/**
* Return the parameter position, or null if the parameter is not a
* positional parameter.
*
* @return position of parameter
*/
Integer getPosition();
/**
* Return the Java type of the parameter. Values bound to the parameter must
* be assignable to this type. This method is required to be supported for
* criteria queries only. Applications that use this method for Java
* Persistence query language queries and native queries will not be
* portable.
*
* @return the Java type of the parameter
* @throws IllegalStateException
* if invoked on a parameter
*
* obtained from a Java persistence query language
*
* query or native query when the implementation does
*
* not support this use
*/
Class<T> getParameterType();
}