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 * 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).
 *
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 * 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 org.graalvm.compiler.options;

A nested Boolean OptionKey that can be overridden by a master
option. 

If the option is present on the command line the specified value is used.
Otherwise getValue depends on the masterOption and evaluates as follows: 

If masterOption is set, this value equals to initialValue. 
Otherwise, if masterOption is false, this option is false. /**
 * A nested Boolean {@link OptionKey} that can be overridden by a {@link #masterOption master
 * option}.
 * <p>
 * <li>If the option is present on the command line the specified value is used.
 * <li>Otherwise {@link #getValue} depends on the {@link #masterOption} and evaluates as follows:
 * <ul>
 * <li>If {@link #masterOption} is set, this value equals to {@link #initialValue}.
 * <li>Otherwise, if {@link #masterOption} is {@code false}, this option is {@code false}.
 */
public class NestedBooleanOptionKey extends OptionKey<Boolean> {
    private final OptionKey<Boolean> masterOption;
    private final Boolean initialValue;

    public NestedBooleanOptionKey(OptionKey<Boolean> masterOption, Boolean initialValue) {
        super(null);
        this.masterOption = masterOption;
        this.initialValue = initialValue;
    }

    public OptionKey<Boolean> getMasterOption() {
        return masterOption;
    }

    @Override
    public Boolean getValue(OptionValues options) {
        Boolean v = super.getValue(options);
        if (v == null) {
            return initialValue && masterOption.getValue(options);
        }
        return v;
    }
}