SingleLineCommentCheck.java

/*
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 * copyright notice, this list of conditions and the following
 * disclaimer. 2) Redistributions in binary form must reproduce the above
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 * disclaimer in the documentation and/or other materials provided
 * with the distribution. 3) Neither the name of the Qulice.com nor
 * the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
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package com.qulice.checkstyle;

import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
import com.puppycrawl.tools.checkstyle.api.DetailAST;
import com.puppycrawl.tools.checkstyle.api.TokenTypes;

/**
 * C++ style inline comment is not allowed.
 * Use //-style comment instead.
 * @since 0.18
 */
public final class SingleLineCommentCheck extends AbstractCheck {
    /**
     * When inside a block comment, holds begin line number.
     */
    private int begin;

    @Override
    public boolean isCommentNodesRequired() {
        return true;
    }

    @Override
    public int[] getDefaultTokens() {
        return new int[]{
            TokenTypes.BLOCK_COMMENT_BEGIN,
            TokenTypes.BLOCK_COMMENT_END,
        };
    }

    @Override
    public int[] getAcceptableTokens() {
        return this.getDefaultTokens();
    }

    @Override
    public int[] getRequiredTokens() {
        return this.getDefaultTokens();
    }

    @Override
    public void visitToken(final DetailAST ast) {
        if (ast.getType() == TokenTypes.BLOCK_COMMENT_BEGIN) {
            this.begin = ast.getLineNo();
        } else if (this.begin == ast.getLineNo()) {
            this.log(ast, "This kind of comment is not allowed.");
        }
    }
}