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 import java.io.*;
  26 import java.util.*;





  27 import java.util.Map.Entry;

  28 
  29 /**
  30  * An option value.
  31  */
  32 public class OptionValue<T> {
  33     /**
  34      * Temporarily changes the value for an option. The {@linkplain OptionValue#getValue() value} of
  35      * {@code option} is set to {@code value} until {@link OverrideScope#close()} is called on the
  36      * object returned by this method.
  37      * <p>
  38      * Since the returned object is {@link AutoCloseable} the try-with-resource construct can be
  39      * used:
  40      *
  41      * <pre>
  42      * try (OverrideScope s = OptionValue.override(myOption, myValue) {
  43      *     // code that depends on myOption == myValue
  44      * }
  45      * </pre>
  46      */
  47     public static OverrideScope override(OptionValue<?> option, Object value) {

   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 import java.io.PrintStream;
  26 import java.util.ArrayList;
  27 import java.util.Collection;
  28 import java.util.Collections;
  29 import java.util.Comparator;
  30 import java.util.HashMap;
  31 import java.util.Map;
  32 import java.util.Map.Entry;
  33 import java.util.Objects;
  34 
  35 /**
  36  * An option value.
  37  */
  38 public class OptionValue<T> {
  39     /**
  40      * Temporarily changes the value for an option. The {@linkplain OptionValue#getValue() value} of
  41      * {@code option} is set to {@code value} until {@link OverrideScope#close()} is called on the
  42      * object returned by this method.
  43      * <p>
  44      * Since the returned object is {@link AutoCloseable} the try-with-resource construct can be
  45      * used:
  46      *
  47      * <pre>
  48      * try (OverrideScope s = OptionValue.override(myOption, myValue) {
  49      *     // code that depends on myOption == myValue
  50      * }
  51      * </pre>
  52      */
  53     public static OverrideScope override(OptionValue<?> option, Object value) {