gradle-master/subprojects/base-services/src/main/java/org/gradle/internal/reflect/Instantiator.java
/*
 * Copyright 2012 the original author or authors.
 *
 * 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 org.gradle.internal.reflect;

import org.gradle.api.reflect.ObjectInstantiationException;
import org.gradle.internal.scan.UsedByScanPlugin;

/**
 * An object that can create new instances of various types. An {@code Instantiator}, depending on its implementation and configuration, may provide
 * a number of capabilities. Some examples:
 *
 * <ul>
 * <li>An implementation may decorate the instances in some fashion, for example to mix in the Groovy DSL, and so may return a subclass of the requested type.
 *
 * <li>An implementation may accept abstract classes or interfaces and provide implementations for the missing pieces, for example providing an implementation of ExtensionAware.
 *
 * <li>An implementation may provide injection of services and other dependencies into the instances it creates, for example exposing services via a getter method.
 *
 * </ul>
 *
 * <p>An implementation is not required to support any of these features. Implementations must be thread-safe.
 *
 * <p>A service of this type is available in all scopes. However, the recommended way to receive an {@code Instantiator} is via a {@link org.gradle.internal.instantiation.InstantiatorFactory}.</p>
 */
@UsedByScanPlugin("test-retry")
public interface Instantiator {

    /**
     * Create a new instance of T, using {@code parameters} as the construction parameters.
     *
     * @throws ObjectInstantiationException On failure to create the new instance.
     */
    <T> T newInstance(Class<? extends T> type, Object... parameters) throws ObjectInstantiationException;

}
