/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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 org.apache.wicket.util.time; | |
import java.io.Serializable; | |
import java.util.Map; | |
import java.util.concurrent.ConcurrentHashMap; | |
/** | |
* This class maps <code>ITimeFrame</code>s to <code>Object</code>s. Since values are stored using | |
* <code>ITimeFrameSource</code> implementing objects, the value returned by the source may vary | |
* over time. For example, one implementation of <code>ITimeFrameSource</code> might return the | |
* start and end time of lunch on any given day. | |
* <p> | |
* To associate an object with a dynamic <code>TimeFrame</code> (via <code>ITimeFrameSource</code>), | |
* call <code>put(ITimeFrameSource, Object)</code>. You can later retrieve the first object for a | |
* point in time with <code>get(Time)</code>. The <code>get</code> method is provided for | |
* convenience and is equivalent to <code>get(Time.now())</code>. | |
* <p> | |
* This class is not thread-safe. | |
* | |
* @author Jonathan Locke | |
* @since 1.2.6 | |
*/ | |
public final class TimeMap implements Serializable | |
{ | |
private static final long serialVersionUID = 1L; | |
/** | |
* <code>Map</code> from <code>ITimeFrameSource</code> implementing objects to | |
* <code>Object</code> values. | |
*/ | |
private final Map<ITimeFrameSource, Object> sources = new ConcurrentHashMap<>(); | |
/** | |
* Retrieves an <code>Object</code> for the current <code>Time</code> value. | |
* | |
* @return <code>Object</code> for the current <code>Time</code> value | |
*/ | |
public Object get() | |
{ | |
return get(Time.now()); | |
} | |
/** | |
* Retrieves an <code>Object</code> for the given <code>Time</code> value. | |
* | |
* @param time | |
* the <code>Time</code> value | |
* @return gets an <code>Object</code> for the given <code>Time</code> value or | |
* <code>null</code> if none exists | |
*/ | |
public Object get(final Time time) | |
{ | |
for (ITimeFrameSource source : sources.keySet()) | |
{ | |
final TimeFrame current = source.getTimeFrame(); | |
if (current.contains(time)) | |
{ | |
return sources.get(current); | |
} | |
} | |
return null; | |
} | |
/** | |
* Associates an <code>Object</code> with a dynamic <code>TimeFrame</code>. | |
* | |
* @param source | |
* a source that can produce a <code>TimeFrame</code> with which to compare a | |
* <code>Time</code> value | |
* @param o | |
* the <code>Object</code> to be returned for the given dynamic | |
* <code>TimeFrame</code> | |
*/ | |
public void put(final ITimeFrameSource source, final Object o) | |
{ | |
final TimeFrame timeframe = source.getTimeFrame(); | |
for (ITimeFrameSource tfs : sources.keySet()) | |
{ | |
final TimeFrame current = tfs.getTimeFrame(); | |
if (timeframe.overlaps(current)) | |
{ | |
throw new IllegalArgumentException("Timeframe " + timeframe + | |
" overlaps timeframe " + current); | |
} | |
} | |
sources.put(source, o); | |
} | |
} |