001/*
002 * SonarQube
003 * Copyright (C) 2009-2017 SonarSource SA
004 * mailto:info AT sonarsource DOT com
005 *
006 * This program is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * This program is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020package org.sonar.api.scan.issue.filter;
021
022
023import javax.annotation.concurrent.ThreadSafe;
024
025import org.sonar.api.ExtensionPoint;
026import org.sonar.api.batch.ScannerSide;
027import org.sonarsource.api.sonarlint.SonarLintSide;
028
029@ScannerSide
030@SonarLintSide
031@ExtensionPoint
032@FunctionalInterface
033@ThreadSafe
034/**
035 * @since 5.3
036 */
037public interface IssueFilter {
038
039  /**
040   * The <code>accept</code> method is called for each {@link FilterableIssue} created during analysis, to check if it has to be persisted. Examples of use cases are:
041   * <ul>
042   *  <li>Ignoring or enforcing rules on specific resources</li>
043   *  <li>Switching-off an issue based on its context (<code>//NOSONAR</code> comments, semantic annotations)</li>
044   * </ul>
045   * The <code>chain</code> parameter allows for fine control of the filtering logic: it is each filter's duty to either pass the issue to the next filter, by calling
046   * the {@link IssueFilterChain#accept} method, or return directly if the issue has to be accepted or not
047   * 
048   * Implementations should be thread safe.
049   * 
050   * @param issue the issue being filtered
051   * @param chain the rest of the filters
052   * @return <code>true</code> to accept the issue, <code>false</code> to reject it, {@link IssueFilterChain#accept} to let the other filters decide.
053   */
054  boolean accept(FilterableIssue issue, IssueFilterChain chain);
055}