001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2018 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.io.File;
023import java.util.SortedSet;
024
025/**
026 * Interface for Checking a set of files for some criteria.
027 *
028 */
029public interface FileSetCheck
030    extends Configurable, Contextualizable {
031
032    /**
033     * Sets the MessageDispatcher that is used to dispatch error
034     * messages to AuditListeners during processing.
035     * @param dispatcher the dispatcher
036     */
037    void setMessageDispatcher(MessageDispatcher dispatcher);
038
039    /**
040     * Initialise the instance. This is the time to verify that everything
041     * required to perform it job.
042     */
043    void init();
044
045    /** Cleans up the object. **/
046    void destroy();
047
048    /**
049     * Called when about to be called to process a set of files.
050     * @param charset the character set used to read the files.
051     */
052    void beginProcessing(String charset);
053
054    /**
055     * Request to process a file. The implementation should use the supplied
056     * contents and not read the contents again. This reduces the amount of
057     * file I/O.
058     * <p>
059     * The file set to process might contain files that are not
060     * interesting to the FileSetCheck. Such files should be ignored,
061     * no error message should be fired for them. For example a FileSetCheck
062     * that checks java files should ignore HTML or properties files.
063     * </p>
064     * <p>
065     * The method should return the set of messages to be logged.
066     * </p>
067     *
068     * @param file the file to be processed
069     * @param fileText the contents of the file.
070     * @return the sorted set of messages to be logged.
071     * @throws CheckstyleException if error condition within Checkstyle occurs
072     */
073    SortedSet<LocalizedMessage> process(File file, FileText fileText) throws CheckstyleException;
074
075    /**
076     * Called when all the files have been processed. This is the time to
077     * perform any checks that need to be done across a set of files. In this
078     * method, the implementation is responsible for the logging of messages.
079     */
080    void finishProcessing();
081
082}