Paul Holmes-Higgin cefda8c965 Updated header to LGPL
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@18931 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
2010-03-01 22:48:39 +00:00

88 lines
2.8 KiB
Java

/*
* Copyright (C) 2005-2010 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco 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.
*
* Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.service.cmr.dictionary;
import java.util.Map;
/**
* The interface for classes that implement constraints on property values.
* <p>
* Implementations of the actual constraint code should must not synchronize
* or in any other way block threads. Concurrent access of the evaluation
* method is expected, but will always occur after initialization has completed.
* <p>
* Attention to performance is <u>crucial</u> for all implementations as
* instances of this class are heavily used.
* <p>
* The constraint implementations can provide standard setter methods that will
* be populated by bean setter injection. Once all the available properties have
* been set, the contraint will be initialized.
*
* @author Derek Hulley
*/
public interface Constraint
{
/**
* Returns the 'type' of the constraint, this is the identifier given to
* constraint in the configuration.
*
* @return The type
*/
public String getType();
/**
* @return the human-readable constraint title (optional)
*/
public String getTitle();
/**
* Gets the constraint name.
*
* @return the constraint name.
*/
public String getShortName();
/**
* Returns the parameters passed to the instance of the constraint.
*
* @return Map of parameters or an empty <tt>Map</tt> if none exist
*/
public Map<String, Object> getParameters();
/**
* Initializes the constraint with appropriate values, which will depend
* on the implementation itself. This method can be implemented as a
* once-off, i.e. reinitialization does not have to be supported.
*
* @param parameters constraint parameters
*/
public void initialize();
/**
* Evaluates a property value according to the implementation and initialization
* parameters provided.
*
* @param value the property value to check
*
* @throws ConstraintException if the value doesn't pass all constraints
*/
public void evaluate(Object value);
}