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 implements Filter {
032
033    /** Filter set. */
034    private final Set<Filter> filters = new HashSet<>();
035
036    /**
037     * Creates a new {@code FilterSet} instance.
038     */
039    public FilterSet() {
040        // no code by default
041    }
042
043    /**
044     * Adds a Filter to the set.
045     *
046     * @param filter the Filter to add.
047     */
048    public void addFilter(Filter filter) {
049        filters.add(filter);
050    }
051
052    /**
053     * Removes filter.
054     *
055     * @param filter filter to remove.
056     */
057    public void removeFilter(Filter filter) {
058        filters.remove(filter);
059    }
060
061    /**
062     * Returns the Filters of the filter set.
063     *
064     * @return the Filters of the filter set.
065     */
066    public Set<Filter> getFilters() {
067        return Collections.unmodifiableSet(filters);
068    }
069
070    @Override
071    public String toString() {
072        return filters.toString();
073    }
074
075    @Override
076    public boolean accept(AuditEvent event) {
077        boolean result = true;
078        for (Filter filter : filters) {
079            if (!filter.accept(event)) {
080                result = false;
081                break;
082            }
083        }
084        return result;
085    }
086
087    /** Clears the FilterSet. */
088    public void clear() {
089        filters.clear();
090    }
091
092}