net.automatalib.util.minimizer.BlockAutomaton Maven / Gradle / Ivy
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This artifact provides various common utility operations for analyzing and manipulating
automata and graphs, such as traversal, minimization and copying.
/* Copyright (C) 2013-2019 TU Dortmund
* This file is part of AutomataLib, http://www.automatalib.net/.
*
* 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 net.automatalib.util.minimizer;
import java.util.Arrays;
import java.util.List;
/**
* A "block automaton", i.e. an automaton-style representation of the minimization result in which each block forms a
* state.
*
* @param
* state class.
* @param
* transition label class.
*
* @author Malte Isberner
*/
public class BlockAutomaton {
// Edges array
private final BlockEdge[][] edges;
/**
* Constructor. Creates the block automaton.
*
* @param minResult
* the minimization result.
*/
@SuppressWarnings("unchecked")
BlockAutomaton(MinimizationResult minResult) {
edges = new BlockEdge[minResult.getNumBlocks()][];
for (Block block : minResult.getBlocks()) {
int id = block.getId();
State rep = block.getStates().choose();
List> outgoing = rep.getOutgoing();
BlockEdge[] array = new BlockEdge[outgoing.size()];
int i = 0;
for (Edge e : outgoing) {
array[i++] =
new BlockEdge<>(block, e.getTarget().getBlock(), e.getTransitionLabel().getOriginalLabel());
}
edges[id] = array;
}
}
/**
* Retrieves a list of outgoing edges of a block (state).
*
* @param block
* the block (state).
*
* @return the outgoing edges of the given block (state).
*/
public List> getOutgoingEdges(Block block) {
return Arrays.asList(edges[block.getId()]);
}
/**
* Retrieves an array of outgoing edges of a block (state).
*
* @see #getOutgoingEdges(Block)
*/
public BlockEdge[] getOutgoingEdgeArray(Block block) {
return edges[block.getId()];
}
}