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Checkstyle is a development tool to help programmers write Java code
that adheres to a coding standard
////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2020 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.checks;
import java.util.regex.Pattern;
import com.puppycrawl.tools.checkstyle.StatelessCheck;
import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
/**
*
* Checks for {@code TODO:} comments. Actually it is a generic
*
* regular expression matcher on Java comments. To check for other patterns
* in Java comments, set the {@code format} property.
*
*
* Using {@code TODO:} comments is a great way to keep track of tasks that need to be done.
* Having them reported by Checkstyle makes it very hard to forget about them.
*
*
* -
* Property {@code format} - Specify pattern to match comments against.
* Default value is {@code "TODO:"}.
*
*
*
* To configure the check:
*
*
* <module name="TodoComment"/>
*
*
* Example:
*
*
* i++; // TODO: do differently in future // violation
* i++; // todo: do differently in future // OK
*
*
* To configure the check for comments that contain {@code TODO} and {@code FIXME}:
*
*
* <module name="TodoComment">
* <property name="format" value="(TODO)|(FIXME)"/>
* </module>
*
*
* Example:
*
*
* i++; // TODO: do differently in future // violation
* i++; // todo: do differently in future // OK
* i=i/x; // FIXME: handle x = 0 case // violation
* i=i/x; // FIX : handle x = 0 case // OK
*
*
* @since 3.0
*/
@StatelessCheck
public class TodoCommentCheck
extends AbstractCheck {
/**
* A key is pointing to the warning message text in "messages.properties"
* file.
*/
public static final String MSG_KEY = "todo.match";
/**
* Specify pattern to match comments against.
*/
private Pattern format = Pattern.compile("TODO:");
@Override
public boolean isCommentNodesRequired() {
return true;
}
/**
* Setter to specify pattern to match comments against.
*
* @param pattern
* pattern of 'todo' comment.
*/
public void setFormat(Pattern pattern) {
format = pattern;
}
@Override
public int[] getDefaultTokens() {
return getRequiredTokens();
}
@Override
public int[] getAcceptableTokens() {
return getRequiredTokens();
}
@Override
public int[] getRequiredTokens() {
return new int[] {TokenTypes.COMMENT_CONTENT };
}
@Override
public void visitToken(DetailAST ast) {
final String[] lines = ast.getText().split("\n");
for (String line : lines) {
if (format.matcher(line).find()) {
log(ast, MSG_KEY, format.pattern());
}
}
}
}