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'Databene Formats' is an open source software library for supporting
data file and other formats like CSV, fixed width files, XLS, Properties and Regex.
It is designed for multithreaded use and high performance.
/*
* Copyright (C) 2011-2014 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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 org.databene.formats.regex;
import java.util.Arrays;
/**
* Represents a sequence of regular expression factors.
*
* @see Factor
*/
public class Sequence implements RegexPart {
/** The represented sequence of regular expression factors */
private RegexPart[] factors;
// constructors ----------------------------------------------------------------------------------------------------
public Sequence(RegexPart ... factors) {
this.factors = factors;
}
public RegexPart[] getFactors() {
return factors;
}
// RegexPart interface implementation ------------------------------------------------------------------------------
@Override
public int minLength() {
int min = 0;
for (RegexPart part : factors)
min += part.minLength();
return min;
}
@Override
public Integer maxLength() {
int max = 0;
for (RegexPart part : factors) {
Integer partMaxLength = part.maxLength();
if (partMaxLength == null) // if one sequence component is unlimited, then the whole sequence is unlimited
return null;
max += partMaxLength;
}
return max;
}
// java.lang.Object overrides --------------------------------------------------------------------------------------
/** @see java.lang.Object#equals(Object) */
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
final Sequence that = (Sequence) o;
return Arrays.equals(this.factors, that.factors);
}
/** @see java.lang.Object#equals(Object) */
@Override
public int hashCode() {
return Arrays.hashCode(factors);
}
/** @see java.lang.Object#equals(Object) */
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
for (Object factor : factors)
buffer.append(factor);
return buffer.toString();
}
}