////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2020 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;

/**
 * <p>
 * Checks the policy on 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.
 * </p>
 * <ul>
 * <li>
 * Property {@code option} - Specify policy on how to pad parentheses.
 * Type is {@code com.puppycrawl.tools.checkstyle.checks.whitespace.PadOption}.
 * Default value is {@code nospace}.
 * </li>
 * </ul>
 * <p>
 * To configure the check:
 * </p>
 * <pre>
 * &lt;module name=&quot;TypecastParenPad&quot;/&gt;
 * </pre>
 * <p>
 * Example:
 * </p>
 * <pre>
 * class Foo {
 *
 *   float f1 = 3.14f;
 *
 *   int n = ( int ) f1; // violation, space after left parenthesis and before right parenthesis
 *
 *   double d = 1.234567;
 *
 *   float f2 = (float ) d; // violation, space before right parenthesis
 *
 *   float f3 = (float) d; // OK
 *
 *   float f4 = ( float) d; // violation, space after left parenthesis
 *
 * }
 * </pre>
 * <p>
 * To configure the check to require spaces:
 * </p>
 * <pre>
 * &lt;module name=&quot;TypecastParenPad&quot;&gt;
 *   &lt;property name=&quot;option&quot; value=&quot;space&quot;/&gt;
 * &lt;/module&gt;
 * </pre>
 * <p>
 * Example:
 * </p>
 * <pre>
 * class Bar {
 *
 *   double d1 = 3.14;
 *
 *   int n = ( int ) d1; // OK
 *
 *   int m = (int ) d1; // violation, no space after left parenthesis
 *
 *   double d2 = 9.8;
 *
 *   int x = (int) d2; // violation, no space after left parenthesis and before right parenthesis
 *
 *   int y = ( int) d2; // violation, no space before right parenthesis
 *
 * }
 * </pre>
 * <p>
 * Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
 * </p>
 * <p>
 * Violation Message Keys:
 * </p>
 * <ul>
 * <li>
 * {@code ws.followed}
 * </li>
 * <li>
 * {@code ws.notFollowed}
 * </li>
 * <li>
 * {@code ws.notPreceded}
 * </li>
 * <li>
 * {@code ws.preceded}
 * </li>
 * </ul>
 *
 * @since 3.2
 */
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 getRequiredTokens();
    }

    @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);
        }
    }

}
