package uws.job.parameters;
/*
* This file is part of UWSLibrary.
*
* UWSLibrary is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* UWSLibrary 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with UWSLibrary. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2012 - UDS/Centre de Données astronomiques de Strasbourg (CDS)
*/
import uws.UWSException;
/**
* <p>Lets controlling an input parameter of a UWS job.</p>
*
* @author Grégory Mantelet (CDS)
* @version 4.0
*/
public interface InputParamController {
/**
* Returns the default value of the controlled parameter.
*
* @return Default value (<i>null</i> is allowed).
*/
public Object getDefault();
/**
* <p>Checks the value of the controlled parameter and builds a new object from this value.</p>
*
* @param value Parameter value to check.
* @return The same value or a new object built from the given value.
* @throws UWSException If the given value is strongly incorrect.
*/
public Object check(final Object value) throws UWSException;
/**
* Tells whether the controlled parameter may be modified after initialization.
*
* @return <i>true</i> to allow the modification, <i>false</i> otherwise.
*/
public boolean allowModification();
}