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 * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

package compiler.lib.ir_framework.driver.irmatching.parser.hotspot;

/**
 * This class represents a writer thread that emits log messages with LogCompilation. It saves and restores a currently
 * parsed {@link LoggedMethod} if a {@link CompilePhaseBlock} was interrupted before reaching the block end tag.
 *
 * @see LoggedMethod
 * @see CompilePhaseBlock
 */
class WriterThread {
    private LoggedMethod loggedMethod = LoggedMethod.DONT_CARE;

    public static boolean isWriterThreadLine(String line) {
        return line.startsWith("<writer");
    }

    public void saveLoggedMethod(LoggedMethod loggedMethod) {
        this.loggedMethod = loggedMethod;
    }

    public LoggedMethod restoreLoggedMethod() {
        LoggedMethod restoredLoggedMethod = loggedMethod;
        if (restoredLoggedMethod != LoggedMethod.DONT_CARE) {
            loggedMethod = LoggedMethod.DONT_CARE;
        }
        return restoredLoggedMethod;
    }
}
