////////////////////////////////////////////////////////////////////////////////
// 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.indentation;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
/**
* Handler for synchronized statements.
*
* @author liscju piotr.listkiewicz@gmail.com
*/
public class SynchronizedHandler extends BlockParentHandler {
/**
* Determine that "synchronized" token used as modifier of method.
*/
private final boolean methodModifier;
/**
* Construct an instance of this handler with the given indentation check,
* name, abstract syntax tree, and parent handler.
*
* @param indentCheck the indentation check
* @param ast the abstract syntax tree
* @param parent the parent handler
*/
public SynchronizedHandler(IndentationCheck indentCheck, DetailAST ast,
AbstractExpressionHandler parent) {
super(indentCheck, "synchronized", ast, parent);
methodModifier = isMethodModifier(ast);
}
@Override
public void checkIndentation() {
if (!methodModifier) {
super.checkIndentation();
checkSynchronizedExpr();
checkWrappingIndentation(getMainAst(),
getSynchronizedStatementRightParen(getMainAst()));
}
}
/**
* Check indentation of expression we synchronized on.
*/
private void checkSynchronizedExpr() {
final DetailAST syncAst = getMainAst().findFirstToken(TokenTypes.LPAREN)
.getNextSibling();
final IndentLevel expected =
new IndentLevel(getIndent(), getBasicOffset());
checkExpressionSubtree(syncAst, expected, false, false);
}
/**
* Checks if given synchronized is modifier of method*
* @param ast synchronized(TokenTypes.LITERAL_SYNCHRONIZED) to check
* @return true if synchronized only modifies method
*/
private static boolean isMethodModifier(DetailAST ast) {
return ast.getParent().getType() == TokenTypes.MODIFIERS;
}
/**
* Returns right parenthesis of synchronized statement.
* @param syncStatementAST ast node(TokenTypes.LITERAL_SYNCHRONIZED)
* @return right parenthesis of synchronized statement.
*/
private static DetailAST getSynchronizedStatementRightParen(DetailAST syncStatementAST) {
return syncStatementAST.findFirstToken(TokenTypes.RPAREN);
}
}