/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource All rights reserved.
 *
 * 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 br.com.caelum.vraptor.util.test;

import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Vetoed;
import javax.enterprise.util.TypeLiteral;

/**
 * Fake implementation for {@link Instance} to test injection with list of elements.
 * @author Otávio Scherer Garcia
 */
@Vetoed
public class MockInstanceImpl<T> implements Instance<T> {

	private List<T> elements;

	public MockInstanceImpl(List<T> elements) {
		this.elements = elements;
	}

	public MockInstanceImpl(T... elements) {
		this.elements = new ArrayList<>();
		for(Object element: elements)
			this.elements.add((T) element);
	}

	@Override
	public Iterator<T> iterator() {
		return elements.iterator();
	}

	@Override
	public T get() {
		return elements.isEmpty() ? null : elements.get(0);
	}

	@Override
	public Instance<T> select(Annotation... qualifiers) {
		return null;
	}

	@Override
	public <U extends T> Instance<U> select(Class<U> subtype, Annotation... qualifiers) {
		return null;
	}

	@Override
	public <U extends T> Instance<U> select(TypeLiteral<U> subtype, Annotation... qualifiers) {
		return null;
	}

	@Override
	public boolean isUnsatisfied() {
		return false;
	}

	@Override
	public boolean isAmbiguous() {
		return false;
	}

	@Override
	public void destroy(T instance) {

	}
}