001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2014  Oliver Burn
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018////////////////////////////////////////////////////////////////////////////////
019package com.puppycrawl.tools.checkstyle.checks.indentation;
020
021import com.puppycrawl.tools.checkstyle.api.DetailAST;
022import com.puppycrawl.tools.checkstyle.api.TokenTypes;
023
024/**
025 * Handler for method definitions.
026 *
027 * @author jrichard
028 * @author Maikel Steneker
029 */
030public class MethodDefHandler extends BlockParentHandler
031{
032    /**
033     * Construct an instance of this handler with the given indentation check,
034     * abstract syntax tree, and parent handler.
035     *
036     * @param indentCheck   the indentation check
037     * @param ast           the abstract syntax tree
038     * @param parent        the parent handler
039     */
040    public MethodDefHandler(IndentationCheck indentCheck,
041        DetailAST ast, ExpressionHandler parent)
042    {
043        super(indentCheck, (ast.getType() == TokenTypes.CTOR_DEF)
044            ? "ctor def" : "method def", ast, parent);
045    }
046
047    @Override
048    protected DetailAST getToplevelAST()
049    {
050        // we check this stuff ourselves below
051        return null;
052    }
053
054    @Override
055    protected void checkModifiers()
056    {
057        final DetailAST modifier = getMainAst().findFirstToken(TokenTypes.MODIFIERS);
058        if (startsLine(modifier)
059            && !getLevel().accept(expandedTabsColumnNo(modifier)))
060        {
061            logError(modifier, "modifier", expandedTabsColumnNo(modifier));
062        }
063    }
064
065    @Override
066    public void checkIndentation()
067    {
068        checkModifiers();
069
070        final LineWrappingHandler lineWrap =
071            new LineWrappingHandler(getIndentCheck(), getMainAst()) {
072                @Override
073                public DetailAST findLastNode(DetailAST firstNode)
074                {
075                    return firstNode.getLastChild().getPreviousSibling();
076                }
077            };
078        lineWrap.checkIndentation();
079        if (getLCurly() == null) {
080            // asbtract method def -- no body
081            return;
082        }
083        super.checkIndentation();
084    }
085}