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The core artifact of AutomataLib. This library contains concrete implementations for many of the automaton model interfaces defined in the API artifact, as well as abstract base classes that facilitate implementing new automaton model classes. Note that concrete algorithms (traversal, reachability analysis etc.) are not in the scope of this artifact.

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/* Copyright (C) 2013-2018 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.automata.base.fast;

import java.util.Collection;
import java.util.HashSet;

import net.automatalib.commons.util.array.ResizingObjectArray;
import net.automatalib.commons.util.nid.AbstractMutableNumericID;

public abstract class AbstractFastNondetState extends AbstractMutableNumericID {

    private final ResizingObjectArray transitions;

    public AbstractFastNondetState(int initialNumOfInputs) {
        this.transitions = new ResizingObjectArray(initialNumOfInputs);
    }

    /**
     * See {@link ResizingObjectArray#ensureCapacity(int)}.
     */
    public final boolean ensureInputCapacity(int capacity) {
        return this.transitions.ensureCapacity(capacity);
    }

    @SuppressWarnings("unchecked")
    public final Collection getTransitions(int inputIdx) {
        return (Collection) transitions.array[inputIdx];
    }

    public final void setTransitions(int inputIdx, Collection transitions) {
        this.transitions.array[inputIdx] = new HashSet(transitions);
    }

    @SuppressWarnings("unchecked")
    public void clearTransitions() {
        for (int i = 0; i < transitions.array.length; i++) {
            ((Collection) transitions.array[i]).clear();
        }
    }

}