PrefixedInitializerMap.java

/***************************************************************************
   Copyright 2013 Emily Estes

   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 net.metanotion.web.concrete;


import net.metanotion.functor.Block;
import net.metanotion.util.MutableDictionary;
import net.metanotion.util.PrefixConcurrentDictionary;
import net.metanotion.web.RequestObject;

/** This class is designed to be used as a request parser (the functor) for the {@link FunctorSessionInitializer}
class. This class keys "uri prefixes" (accessible via the exposed {@link net.metanotion.util.MutableDictionary}
interface) to application specific objects (the type parameter D).
	@param <D> the type of objects this functor converts request objects into.
*/
public final class PrefixedInitializerMap<D> implements Block<RequestObject,D>, MutableDictionary<String,D> {
	private final PrefixConcurrentDictionary<D> map = new PrefixConcurrentDictionary<D>();
	@Override public D remove(final String prefix) { return map.remove(prefix); }
	@Override public void put(final String prefix, D val) { map.put(prefix, val); }
	@Override public D get(final String prefix) { return map.get(prefix); }
	@Override public D eval(final RequestObject ro) throws Exception { return map.get(ro.getResource()); }
}