/*
 * Copyright (c) 2013, grossmann
 * All rights reserved.
 * 
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 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
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 *   documentation and/or other materials provided with the distribution.
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 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package org.jowidgets.examples.common.workbench.demo4.command;

import org.jowidgets.api.command.EnabledState;
import org.jowidgets.api.command.IEnabledState;
import org.jowidgets.examples.common.workbench.demo4.model.BeanTableModel;
import org.jowidgets.tools.command.AbstractEnabledChecker;
import org.jowidgets.tools.controller.TableDataModelAdapter;

public final class SingleSelectionEnabledChecker extends AbstractEnabledChecker {

    private final BeanTableModel<?> model;

    public SingleSelectionEnabledChecker(final BeanTableModel<?> model) {
        this.model = model;

        model.addDataModelListener(new TableDataModelAdapter() {
            @Override
            public void selectionChanged() {
                fireEnabledStateChanged();
            }
        });
    }

    @Override
    public IEnabledState getEnabledState() {
        if (model.getSelection().size() == 1) {
            return EnabledState.ENABLED;
        }
        else {
            return EnabledState.disabled("Exactly one dataset must be selected!");
        }
    }
}