1 /* 2 * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.options; 24 25 /** 26 * A nested Boolean {@link OptionValue} that can be overridden by a {@link #masterOption master 27 * option}. 28 * <p> 29 * <li>If the option is present on the command line the specified value is used. 30 * <li>Otherwise {@link #getValue()} depends on the {@link #masterOption} and evaluates as follows: 31 * <ul> 32 * <li>If {@link #masterOption} is set, this value equals to {@link #initialValue}. 33 * <li>Otherwise, if {@link #masterOption} is {@code false}, this option is {@code false}. 34 */ 35 public class NestedBooleanOptionValue extends OptionValue<Boolean> { 36 private final OptionValue<Boolean> masterOption; 37 private final Boolean initialValue; 38 39 public NestedBooleanOptionValue(OptionValue<Boolean> masterOption, Boolean initialValue) { 40 super(null); 41 this.masterOption = masterOption; 42 this.initialValue = initialValue; 43 } 44 45 public OptionValue<Boolean> getMasterOption() { 46 return masterOption; 47 } 48 49 @Override 50 public Boolean getValue() { 51 Boolean v = super.getValue(); 52 if (v == null) { 53 return initialValue && masterOption.getValue(); 54 } 55 return v; 56 } 57 58 }