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.coding;
020
021import com.puppycrawl.tools.checkstyle.api.DetailAST;
022import com.puppycrawl.tools.checkstyle.api.TokenTypes;
023
024import com.puppycrawl.tools.checkstyle.checks.DescendantTokenCheck;
025
026/**
027 * <p>
028 * Checks that classes (except abstract one) define a ctor and don't rely
029 * on the default one.
030 * </p>
031 * <p>
032 * An example of how to configure the check is:
033 * </p>
034 * <pre>
035 * &lt;module name="MissingCtor"/&gt;
036 * </pre>
037 *
038 * @author o_sukhodolsky
039 */
040public class MissingCtorCheck extends DescendantTokenCheck
041{
042    /** Creates new instance of the check. */
043    public MissingCtorCheck()
044    {
045        setLimitedTokens(new String[] {
046            TokenTypes.getTokenName(TokenTypes.CTOR_DEF),
047        });
048        setMinimumNumber(1);
049        setMaximumDepth(2);
050        setMinimumMessage("missing.ctor");
051    }
052
053    @Override
054    public int[] getDefaultTokens()
055    {
056        return new int[]{TokenTypes.CLASS_DEF};
057    }
058
059    @Override
060    public int[] getAcceptableTokens()
061    {
062        return getDefaultTokens();
063    }
064
065    @Override
066    public void visitToken(DetailAST ast)
067    {
068        final DetailAST modifiers = ast.findFirstToken(TokenTypes.MODIFIERS);
069        if ((modifiers != null)
070            && modifiers.branchContains(TokenTypes.ABSTRACT))
071        {
072            // should apply the check to abstract class
073            return;
074        }
075
076        super.visitToken(ast);
077    }
078}