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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.util.HashSet;
import java.util.Set;
import com.vaadin.server.SerializablePredicate;
/**
* Item enabled provider class for declarative support.
* <p>
* Provides a straightforward mapping between an item and its enable state.
*
* @param <T>
* item type
*/
class DeclarativeItemEnabledProvider<T> implements SerializablePredicate<T> {
private Set<T> disabled = new HashSet<>();
@Override
public boolean test(T item) {
return !disabled.contains(item);
}
/**
* Adds the {@code item} to disabled items list.
*
* @param item
* a data item
* @param caption
* a caption for the {@code item}
*/
protected void addDisabled(T item) {
disabled.add(item);
}
}
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