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Injectable.java
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Injectable.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.server.plugins;
/**
* Used to allow custom values to be injected into JAX-RS classes.
*
* @param <T> the type of the value, or an interface the value implements.
*/
public interface Injectable<T>
{
/**
* Get the injectable value.
*
* @return the injectable value
*/
T getValue();
/**
* The type that resources should ask for to get this value;
* this can either be the concrete class, or some interface the
* value instance implements.
*
* @return a class that methods that want this value injected should ask for
*/
Class<T> getType();
/**
* Utility to wrap a singleton value as an injectable.
*
* @param type the type that JAX-RS classes should ask for
* @param obj the value
* @param <T> same as type
* @return
*/
static <T> Injectable<T> injectable( Class<T> type, T obj )
{
return new Injectable<T>()
{
@Override
public T getValue()
{
return obj;
}
@Override
public Class<T> getType()
{
return type;
}
};
}
}