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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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 com.vaadin.ui;
import java.lang.reflect.Method;
import java.util.Objects;
import com.vaadin.event.selection.MultiSelectionEvent;
import com.vaadin.event.selection.MultiSelectionListener;
import com.vaadin.shared.Registration;
import com.vaadin.shared.data.selection.SelectionModel.Multi;
import com.vaadin.util.ReflectTools;
/**
* Base class for listing components that allow selecting multiple items.
*
* @param <T>
* item type
* @author Vaadin Ltd
* @since 8.0
*/
public abstract class AbstractMultiSelect<T>
extends AbstractListing<T, Multi<T>> {
@Deprecated
private static final Method SELECTION_CHANGE_METHOD = ReflectTools
.findMethod(MultiSelectionListener.class, "accept",
MultiSelectionEvent.class);
/**
* Creates a new multi select with an empty data source.
*/
protected AbstractMultiSelect() {
super();
}
/**
* Adds a selection listener that will be called when the selection is
* changed either by the user or programmatically.
*
* @param listener
* the value change listener, not <code>null</code>
* @return a registration for the listener
*/
public Registration addSelectionListener(
MultiSelectionListener<T> listener) {
Objects.requireNonNull(listener, "listener cannot be null");
addListener(MultiSelectionEvent.class, listener,
SELECTION_CHANGE_METHOD);
return () -> removeListener(MultiSelectionEvent.class, listener);
}
}
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