net.automatalib.automata.base.StateIDGrowingMapping Maven / Gradle / Ivy
/* Copyright (C) 2013 TU Dortmund
* This file is part of AutomataLib, http://www.automatalib.net/.
*
* AutomataLib is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 3.0 as published by the Free Software Foundation.
*
* AutomataLib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with AutomataLib; if not, see
* http://www.gnu.de/documents/lgpl.en.html.
*/
package net.automatalib.automata.base;
import net.automatalib.automata.Automaton;
import net.automatalib.automata.concepts.StateIDs;
import net.automatalib.commons.util.array.ResizingObjectArray;
import net.automatalib.commons.util.mappings.MutableMapping;
public class StateIDGrowingMapping implements MutableMapping {
private final Automaton automaton;
private final StateIDs stateIds;
private final ResizingObjectArray storage;
public StateIDGrowingMapping(Automaton automaton, StateIDs stateIds) {
this.automaton = automaton;
this.stateIds = stateIds;
this.storage = new ResizingObjectArray(automaton.size());
}
/*
* (non-Javadoc)
* @see net.automatalib.commons.util.mappings.Mapping#get(java.lang.Object)
*/
@Override
@SuppressWarnings("unchecked")
public V get(S elem) {
int id = stateIds.getStateId(elem);
if(id < storage.array.length)
return (V)storage.array[id];
return null;
}
/*
* (non-Javadoc)
* @see net.automatalib.commons.util.mappings.MutableMapping#put(java.lang.Object, java.lang.Object)
*/
@Override
@SuppressWarnings("unchecked")
public V put(S key, V value) {
int id = stateIds.getStateId(key);
if(id >= storage.array.length)
storage.ensureCapacity(automaton.size());
V old = (V)storage.array[id];
storage.array[id] = value;
return old;
}
}