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////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2017 the original author or authors.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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 this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
////////////////////////////////////////////////////////////////////////////////
package com.puppycrawl.tools.checkstyle.filters;
import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.StringTokenizer;
/**
* <p>
* This filter accepts an integer that matches a CSV value, where
* each value is an integer or a range of integers.
* </p>
* @author Rick Giles
* @author o_sukhodolsky
*/
class CsvFilter implements IntFilter {
/** Filter set. */
private final Set<IntFilter> filters = new HashSet<>();
/**
* Constructs a {@code CsvFilter} from a CSV, Comma-Separated Values,
* string. Each value is an integer, or a range of integers. A range of
* integers is of the form integer-integer, such as 1-10.
* Note: integers must be non-negative.
* @param pattern the CSV string.
* @throws NumberFormatException if a component substring does not
* contain a parsable integer.
*/
CsvFilter(String pattern) {
final StringTokenizer tokenizer = new StringTokenizer(pattern, ",");
while (tokenizer.hasMoreTokens()) {
final String token = tokenizer.nextToken().trim();
final int index = token.indexOf('-');
if (index == -1) {
final int matchValue = Integer.parseInt(token);
addFilter(new IntMatchFilter(matchValue));
}
else {
final int lowerBound =
Integer.parseInt(token.substring(0, index));
final int upperBound =
Integer.parseInt(token.substring(index + 1));
addFilter(new IntRangeFilter(lowerBound, upperBound));
}
}
}
/**
* Adds a IntFilter to the set.
* @param filter the IntFilter to add.
*/
public final void addFilter(IntFilter filter) {
filters.add(filter);
}
/**
* Returns the IntFilters of the filter set.
* @return the IntFilters of the filter set.
*/
protected Set<IntFilter> getFilters() {
return Collections.unmodifiableSet(filters);
}
/**
* Determines whether an Integer matches a CSV integer value.
* @param intValue the Integer to check.
* @return true if intValue is an Integer that matches a CSV value.
*/
@Override
public boolean accept(int intValue) {
for (IntFilter filter : getFilters()) {
if (filter.accept(intValue)) {
return true;
}
}
return false;
}
@Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (object == null || getClass() != object.getClass()) {
return false;
}
final CsvFilter csvFilter = (CsvFilter) object;
return Objects.equals(filters, csvFilter.filters);
}
@Override
public int hashCode() {
return Objects.hash(filters);
}
}
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