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package com.sun.jersey.server.impl.inject;
import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.spi.inject.Injectable;
import java.util.ArrayList;
import java.util.List;
/**
* An injectable that obtains an injectable value given the {@link HttpContext}.
*
* @param the type of the injectable value.
* @author [email protected]
*/
public abstract class AbstractHttpContextInjectable implements Injectable {
/**
* This implementation throws an {@link IllegalStateException}.
*
*/
@Override
public T getValue() {
throw new IllegalStateException();
}
/**
* Get the injectable value given the {@link HttpContext}.
*
* @param c the http context,
* @return the value.
*
*/
public abstract T getValue(HttpContext c);
/**
* Transform a list of {@link Injectable} into a list of this class.
*
* @param l the list of injectable.
* @return the list of this class.
*/
public static List transform(List l) {
List al = new ArrayList(l.size());
for (Injectable i : l) {
al.add(transform(i));
}
return al;
}
/**
* Transform a {@link Injectable} into an instance of this class.
*
* @param i the injectable.
* @return an instance of this class.
*/
public static AbstractHttpContextInjectable transform(final Injectable i) {
if (i == null) {
return null;
} else if (i instanceof AbstractHttpContextInjectable) {
return (AbstractHttpContextInjectable)i;
} else {
return new AbstractHttpContextInjectable() {
@Override
public Object getValue(HttpContext c) {
return i.getValue();
}
};
}
}
}