org.apache.lucene.util.automaton.TooComplexToDeterminizeException Maven / Gradle / Ivy
package org.apache.lucene.util.automaton;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/**
* This exception is thrown when determinizing an automaton would result in one
* has too many states.
*/
public class TooComplexToDeterminizeException extends RuntimeException {
private transient final Automaton automaton;
private transient final RegExp regExp;
private transient final int maxDeterminizedStates;
/** Use this constructor when the RegExp failed to convert to an automaton. */
public TooComplexToDeterminizeException(RegExp regExp, TooComplexToDeterminizeException cause) {
super("Determinizing " + regExp.getOriginalString() + " would result in more than " +
cause.maxDeterminizedStates + " states.", cause);
this.regExp = regExp;
this.automaton = cause.automaton;
this.maxDeterminizedStates = cause.maxDeterminizedStates;
}
/** Use this constructor when the automaton failed to determinize. */
public TooComplexToDeterminizeException(Automaton automaton, int maxDeterminizedStates) {
super("Determinizing automaton with " + automaton.getNumStates() + " states and " + automaton.getNumTransitions() + " transitions would result in more than " + maxDeterminizedStates + " states.");
this.automaton = automaton;
this.regExp = null;
this.maxDeterminizedStates = maxDeterminizedStates;
}
/** Returns the automaton that caused this exception, if any. */
public Automaton getAutomaton() {
return automaton;
}
/**
* Return the RegExp that caused this exception if any.
*/
public RegExp getRegExp() {
return regExp;
}
/** Get the maximum number of allowed determinized states. */
public int getMaxDeterminizedStates() {
return maxDeterminizedStates;
}
}