com.liferay.source.formatter.checkstyle.checks.LambdaCheck Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* 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.
*/
package com.liferay.source.formatter.checkstyle.checks;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
/**
* @author Hugo Huijser
*/
public class LambdaCheck extends BaseCheck {
@Override
public int[] getDefaultTokens() {
return new int[] {TokenTypes.LAMBDA};
}
@Override
protected void doVisitToken(DetailAST detailAST) {
DetailAST lastChildDetailAST = detailAST.getLastChild();
if (lastChildDetailAST.getType() != TokenTypes.SLIST) {
return;
}
DetailAST firstChildDetailAST = lastChildDetailAST.getFirstChild();
if (lastChildDetailAST.getChildCount() == 2) {
if (firstChildDetailAST.getType() == TokenTypes.LITERAL_RETURN) {
log(detailAST, _MSG_SIMPLIFY_LAMBDA);
}
return;
}
if ((lastChildDetailAST.getChildCount() != 3) ||
(firstChildDetailAST.getType() != TokenTypes.EXPR)) {
return;
}
DetailAST nextSiblingDetailAST = firstChildDetailAST.getNextSibling();
if (nextSiblingDetailAST.getType() == TokenTypes.SEMI) {
log(detailAST, _MSG_SIMPLIFY_LAMBDA);
}
}
private static final String _MSG_SIMPLIFY_LAMBDA = "lambda.simplify";
}