com.puppycrawl.tools.checkstyle.checks.whitespace.TypecastParenPadCheck Maven / Gradle / Ivy
////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2015 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.whitespace;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;
/**
* Checks the padding of parentheses for typecasts. That is whether a space
* is required after a left parenthesis and before a right parenthesis, or such
* spaces are forbidden.
*
*
* The policy to verify is specified using the {@link PadOption} class and
* defaults to {@link PadOption#NOSPACE}.
*
*
* An example of how to configure the check is:
*
*
* <module name="TypecastParenPad"/>
*
*
* An example of how to configure the check to require spaces for the
* parentheses of constructor, method, and super constructor invocations is:
*
*
* <module name="TypecastParenPad">
* <property name="option" value="space"/>
* </module>
*
* @author Oliver Burn
*/
public class TypecastParenPadCheck extends AbstractParenPadCheck {
@Override
public int[] getRequiredTokens() {
return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST};
}
@Override
public int[] getDefaultTokens() {
return getRequiredTokens();
}
@Override
public int[] getAcceptableTokens() {
return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST};
}
@Override
public void visitToken(DetailAST ast) {
// Strange logic in this method to guard against checking RPAREN tokens
// that are not associated with a TYPECAST token.
if (ast.getType() == TokenTypes.TYPECAST) {
processLeft(ast);
}
else if (ast.getParent().getType() == TokenTypes.TYPECAST
&& ast.getParent().findFirstToken(TokenTypes.RPAREN) == ast) {
processRight(ast);
}
}
}