/**
* Copyright (C) 2008 Google 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.google.inject.grapher;
import com.google.inject.Key;
/**
* Factory for abstract identifiers for elements on the graph. Most graph nodes
* will correspond directly to {@link Key}s, but we do this for additional
* flexibility and because instances do not have separate {@link Key}s from the
* interfaces they are bound to.
* <p>
* Node IDs are treated as opaque values by {@link GraphingVisitor} and the
* other classes in this package.
*
* @author phopkins@gmail.com (Pete Hopkins)
*
* @param <K> The type for node IDs.
*/
public interface NodeIdFactory<K> {
K getClassNodeId(Key<?> key);
K getInstanceNodeId(Key<?> key);
}