/**
*
* Copyright (c) 2006-2017, Speedment, Inc. 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 com.speedment.common.injector.dependency;
import com.speedment.common.injector.State;
/**
* A dependency in the configuration graph.
*
* @author Emil Forslund
* @since 1.2.0
*/
public interface Dependency {
/**
* The node that is depended on.
*
* @return the depended node
*/
DependencyNode getNode();
/**
* The state that the node returned by {@link #getNode()} must be in for
* this dependency to be satisfied.
*
* @return the state that the dependency must be in
*/
State getRequiredState();
/**
* Returns {@code true} if this dependency is satisfied, else {@code false}.
*
* @return {@code true} if satisfied, else {@code false}
*/
default boolean isSatisfied() {
return getNode().is(getRequiredState());
}
}