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/*
 * GroupLens Common Utilities
 * Copyright © 2011 Regents of the University of Minnesota
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 *  * Neither the name of the University of Minnesota nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software has been partly funded by NSF grant IIS 08-08692.
 */
package org.grouplens.common.test;

import java.lang.annotation.Annotation;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Module;
import com.google.inject.TypeLiteral;

/**
 * Helpers for testing Guice code
 * @author Michael Ekstrand 
 *
 */
public class GuiceHelpers {

	public static  T inject(Module module, Class type, Class  annotation) {
		Injector inj = Guice.createInjector(module);
		return inject(inj, type, annotation);
	}

	public static  T inject(Injector injector, Class type, Class  annotation) {
		Key key = Key.get(type, annotation);
		return injector.getInstance(key);
	}
	
	public static  T inject(Module module, TypeLiteral type, Class  annotation) {
		Injector inj = Guice.createInjector(module);
		return inject(inj, type, annotation);
	}
	
	public static  T inject(Injector injector, TypeLiteral type, Class  annotation) {
		Key key = Key.get(type, annotation);
		return injector.getInstance(key);
	}
	
	public static  T inject(Module module, Class type) {
		return inject(Guice.createInjector(module), type);
	}
	
	public static  T inject(Injector injector, Class type) {
		return injector.getInstance(type);
	}
}