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- /*
- * Copyright (c) 2006-2015 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
- package com.dmdirc.events;
-
- import java.util.Collections;
- import java.util.Map;
- import java.util.Optional;
- import java.util.concurrent.ConcurrentHashMap;
-
- /**
- * Provides a map of {@link DisplayProperty}s to values, maintaining type safety.
- */
- public class DisplayPropertyMap {
-
- public static final DisplayPropertyMap EMPTY = new ReadOnlyDisplayPropertyMap();
-
- private final Map<DisplayProperty<?>, Object> properties = new ConcurrentHashMap<>();
-
- /**
- * Gets the value of the specified property, if present.
- *
- * @param property The property to be retrieved.
- * @param <T> The type of value the property takes.
- * @return An optional containing the value of the property if it was present.
- */
- @SuppressWarnings("unchecked")
- public <T> Optional<T> get(final DisplayProperty<T> property) {
- return Optional.ofNullable((T) properties.get(property));
- }
-
- /**
- * Adds a new value for the specified property. Any previous value will be replaced.
- *
- * @param property The property to set.
- * @param value The new value of the property.
- * @param <T> The type of value the property takes.
- */
- public <T> void put(final DisplayProperty<T> property, final T value) {
- properties.put(property, value);
- }
-
- /**
- * Adds all properties from the other map to this one.
- *
- * @param other The map to add properties from.
- */
- public void putAll(final DisplayPropertyMap other) {
- properties.putAll(other.getProperties());
- }
-
- /**
- * Removes a value for the specified property.
- *
- * @param property The property to be removed
- * @param <T> The type of value the property takes
- */
- public <T> void remove(final DisplayProperty<T> property) {
- properties.remove(property);
- }
-
- /**
- * Returns a readonly copy of this map's properties
- *
- * @return This map's properties.
- */
- Map<DisplayProperty<?>, Object> getProperties() {
- return Collections.unmodifiableMap(properties);
- }
-
- private static class ReadOnlyDisplayPropertyMap extends DisplayPropertyMap {
- @Override
- public <T> void put(final DisplayProperty<T> property, final T value) {
- throw new UnsupportedOperationException("Read only");
- }
- }
-
- }
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