/**
* Copyright (C) 2015 Valkyrie RCP
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.valkyriercp.list;
import org.valkyriercp.binding.value.ValueModel;
import org.valkyriercp.core.Guarded;
/**
* This class applies a guard to a {@link Guarded} object that only enables the
* guarded object if the provided list selection model value holder has exactly
* one item selected.
*
* @author Larry Streepy
*
*/
public class ListSingleSelectionGuard extends AbstractListSelectionGuard {
/**
* Constructor.
*
* @param selectionHolder ValueModel holding the list selection (value must
* be an array of int (<code>int[]</code).
* @param guarded Object to guard
*/
public ListSingleSelectionGuard( ValueModel selectionHolder, Guarded guarded ) {
super(selectionHolder, guarded);
}
/**
* Determine if the guarded object should be enabled based on the contents
* of the current selection model value.
*
* @param selected The array of selected rows
* @return boolean true if the guarded object should be enabled
*/
protected boolean shouldEnable( int[] selected ) {
return selected != null && selected.length == 1;
}
}