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* Copyright (C) 2009-2011 Mathias Doenitz
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.parboiled.trees;
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import java.util.List;
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* A node in a directed graph (that may have cycles).
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* The children list must not contain null entries.
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* @param <T> the actual implementation type of this graph node
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public interface GraphNode<T extends GraphNode<T>> {
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* Returns the sub nodes of this node.
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* @return the sub nodes
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List<T> getChildren();