/*
* LensKit, an open source recommender systems toolkit.
* Copyright 2010-2014 LensKit Contributors. See CONTRIBUTORS.md.
* Work on LensKit has been funded by the National Science Foundation under
* grants IIS 05-34939, 08-08692, 08-12148, and 10-17697.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 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, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.grouplens.lenskit.inject;
import com.google.common.base.Preconditions;
import org.grouplens.grapht.AbstractContext;
import org.grouplens.grapht.Binding;
import org.grouplens.grapht.Context;
import org.grouplens.lenskit.core.LenskitBinding;
import org.grouplens.lenskit.core.LenskitConfigContext;
import org.grouplens.lenskit.core.Parameter;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.lang.annotation.Annotation;
/**
* Helper for implementing Lenskit config contexts.
*
* @author <a href="http://www.grouplens.org">GroupLens Research</a>
* @since 1.0
*/
public abstract class AbstractConfigContext extends AbstractContext implements LenskitConfigContext {
/**
* Coerce a Grapht context to a LensKit context.
*
* @param ctx The context.
* @return A LensKit context, as a wrapper if necessary.
*/
protected static LenskitConfigContext wrapContext(Context ctx) {
if (ctx instanceof LenskitConfigContext) {
return (LenskitConfigContext) ctx;
} else {
return new ContextWrapper(ctx);
}
}
@Override
public <T> LenskitBinding<T> bind(Class<? extends Annotation> qual, Class<T> type) {
return LenskitBindingImpl.wrap(super.bind(qual, type));
}
@Override
public <T> LenskitBinding<T> bindAny(Class<T> type) {
return LenskitBindingImpl.wrap(super.bindAny(type));
}
@Override
@SuppressWarnings("rawtypes")
public Binding set(Class<? extends Annotation> param) {
Preconditions.checkNotNull(param);
final Parameter annot = param.getAnnotation(Parameter.class);
if (annot == null) {
throw new IllegalArgumentException(param.toString() + "has no Parameter annotation");
}
return bind(annot.value()).withQualifier(param);
}
@SuppressWarnings("unchecked")
@Override
public void addComponent(@Nonnull Object obj) {
bind((Class) obj.getClass()).toInstance(obj);
}
@SuppressWarnings("unchecked")
@Override
public void addComponent(@Nonnull Class<?> type) {
bind((Class) type).to(type);
}
@Override @Deprecated
public LenskitConfigContext in(Class<?> type) {
return within(type);
}
@Override @Deprecated
public LenskitConfigContext in(@Nullable Class<? extends Annotation> qualifier, Class<?> type) {
return within(qualifier, type);
}
@Override @Deprecated
public LenskitConfigContext in(@Nullable Annotation qualifier, Class<?> type) {
return within(qualifier, type);
}
}