| //////////////////////////////////////////////////////////////////////////////// |
| // checkstyle: Checks Java source code for adherence to a set of rules. |
| // Copyright (C) 2001-2017 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.coding; |
| |
| 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 that no method having zero parameters is defined |
| * using the name <em>finalize</em>. |
| * |
| * @author fqian@google.com (Feng Qian) |
| * @author smckay@google.com (Steve McKay) |
| * @author lkuehne |
| */ |
| @StatelessCheck |
| public class NoFinalizerCheck extends AbstractCheck { |
| |
| /** |
| * A key is pointing to the warning message text in "messages.properties" |
| * file. |
| */ |
| public static final String MSG_KEY = "avoid.finalizer.method"; |
| |
| @Override |
| public int[] getDefaultTokens() { |
| return getAcceptableTokens(); |
| } |
| |
| @Override |
| public int[] getAcceptableTokens() { |
| return new int[] {TokenTypes.METHOD_DEF}; |
| } |
| |
| @Override |
| public int[] getRequiredTokens() { |
| return getAcceptableTokens(); |
| } |
| |
| @Override |
| public void visitToken(DetailAST aAST) { |
| final DetailAST mid = aAST.findFirstToken(TokenTypes.IDENT); |
| final String name = mid.getText(); |
| |
| if ("finalize".equals(name)) { |
| |
| final DetailAST params = aAST.findFirstToken(TokenTypes.PARAMETERS); |
| final boolean hasEmptyParamList = |
| params.findFirstToken(TokenTypes.PARAMETER_DEF) == null; |
| |
| if (hasEmptyParamList) { |
| log(aAST.getLineNo(), MSG_KEY); |
| } |
| } |
| } |
| } |