001///////////////////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code and other text files for adherence to a set of rules.
003// Copyright (C) 2001-2026 the original author or authors.
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018///////////////////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle.api;
021
022import java.util.Collections;
023import java.util.HashSet;
024import java.util.Set;
025
026/**
027 * A filter set applies filters to AuditEvents.
028 * If a filter in the set rejects an AuditEvent, then the
029 * AuditEvent is rejected. Otherwise, the AuditEvent is accepted.
030 */
031public class FilterSet
032    implements Filter {
033
034    /** Filter set. */
035    private final Set<Filter> filters = new HashSet<>();
036
037    /**
038     * Creates a new {@code FilterSet} instance.
039     */
040    public FilterSet() {
041        // no code by default
042    }
043
044    /**
045     * Adds a Filter to the set.
046     *
047     * @param filter the Filter to add.
048     */
049    public void addFilter(Filter filter) {
050        filters.add(filter);
051    }
052
053    /**
054     * Removes filter.
055     *
056     * @param filter filter to remove.
057     */
058    public void removeFilter(Filter filter) {
059        filters.remove(filter);
060    }
061
062    /**
063     * Returns the Filters of the filter set.
064     *
065     * @return the Filters of the filter set.
066     */
067    public Set<Filter> getFilters() {
068        return Collections.unmodifiableSet(filters);
069    }
070
071    @Override
072    public String toString() {
073        return filters.toString();
074    }
075
076    @Override
077    public boolean accept(AuditEvent event) {
078        boolean result = true;
079        for (Filter filter : filters) {
080            if (!filter.accept(event)) {
081                result = false;
082                break;
083            }
084        }
085        return result;
086    }
087
088    /** Clears the FilterSet. */
089    public void clear() {
090        filters.clear();
091    }
092
093}