1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556 |
- /*
- * Copyright 2000-2018 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.HashMap;
- import java.util.Map;
-
- /**
- * Item caption generator class for declarative support.
- * <p>
- * Provides a straightforward mapping between an item and its caption.
- *
- * @param <T>
- * item type
- */
- class DeclarativeCaptionGenerator<T> implements ItemCaptionGenerator<T> {
-
- private ItemCaptionGenerator<T> fallback;
- private Map<T, String> captions = new HashMap<>();
-
- public DeclarativeCaptionGenerator(ItemCaptionGenerator<T> fallback) {
- this.fallback = fallback;
- }
-
- @Override
- public String apply(T item) {
- return captions.containsKey(item) ? captions.get(item)
- : fallback.apply(item);
- }
-
- /**
- * Sets a {@code caption} for the {@code item}.
- *
- * @param item
- * a data item
- * @param caption
- * a caption for the {@code item}
- */
- protected void setCaption(T item, String caption) {
- captions.put(item, caption);
- }
-
- }
|