////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2008 Oliver Burn
//
// 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 assignements.
*
* @author o_sukhodolsky
*/
public class AssignHandler extends BlockParentHandler
{
/**
* Construct an instance of this handler with the given indentation check,
* abstract syntax tree, and parent handler.
*
* @param aIndentCheck the indentation check
* @param aAst the abstract syntax tree
* @param aParent the parent handler
*/
public AssignHandler(IndentationCheck aIndentCheck,
DetailAST aAst, ExpressionHandler aParent)
{
super(aIndentCheck, "assign", aAst, aParent);
}
@Override
public void checkIndentation()
{
final IndentLevel expectedLevel = getChildrenExpectedLevel();
// check indentation of assign if it starts line
final DetailAST assign = getMainAst();
if (startsLine(assign)
&& !expectedLevel.accept(expandedTabsColumnNo(assign)))
{
logError(assign, "" , expandedTabsColumnNo(assign), expectedLevel);
}
// check indentation of rvalue
DetailAST child = (DetailAST) assign.getFirstChild();
// if this is assign in expression then skip first child,
// because it's lvalue.
final DetailAST parent = assign.getParent();
if ((parent != null) && (parent.getType() == TokenTypes.EXPR)) {
child = (DetailAST) child.getNextSibling();
}
if ((parent != null)
&& (parent.getType() == TokenTypes.ANNOTATION_MEMBER_VALUE_PAIR))
{
child = (DetailAST) assign.getNextSibling();
}
checkExpressionSubtree(child, expectedLevel, false, true);
}
@Override
protected boolean shouldIncreaseIndent()
{
return false;
}
@Override
public IndentLevel suggestedChildLevel(ExpressionHandler aChild)
{
final DetailAST assign = getMainAst();
final DetailAST child = aChild.getMainAst();
if (child == assign.getFirstChild()) {
// left side of assignment should have the same
// indentation as "assignment"
return getLevel();
}
if (startsLine(assign)) {
return new IndentLevel(expandedTabsColumnNo(assign));
}
return super.suggestedChildLevel(aChild);
}
}