com.puppycrawl.tools.checkstyle.checks.coding.NoFinalizerCheck Maven / Gradle / Ivy
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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) 2001-2017 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.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 finalize.
*
* @author [email protected] (Feng Qian)
* @author [email protected] (Steve McKay)
* @author lkuehne
*/
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.branchContains(TokenTypes.PARAMETER_DEF);
if (hasEmptyParamList) {
log(aAST.getLineNo(), MSG_KEY);
}
}
}
}