/*
* Copyright 2016-present Facebook, Inc.
*
* 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.facebook.buck.versions;
import com.facebook.buck.model.BuildTarget;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
/**
* Interface for selecting versions for a versioned sub-graph represented by a root node and its
* version domain.
*/
public interface VersionSelector {
/**
* @param root the root of the versioned sub-graph.
* @param domain the versioned nodes and their version domain.
* @return the map of versioned nodes to their selected versions.
* @throws VersionException
*/
ImmutableMap<BuildTarget, Version> resolve(
BuildTarget root, ImmutableMap<BuildTarget, ImmutableSet<Version>> domain)
throws VersionException;
}