hg/apidesign: samples/misuse/src/org/apidesign/misuse/projectconfig/ProjectConfigurationCorrect.java@3bc4c54f4bcc

     1 package org.apidesign.misuse.projectconfig;

     3 public class ProjectConfigurationCorrect {

     4     // BEGIN: misuse.prjconfig.correct

     5     interface ProjectConfigurationProvider

     6         <Configuration extends ProjectConfiguration> {

     7         Configuration[] getConfigurations();

     8         Configuration getActive();

     9         void setActive(Configuration c);

    10     }

    11     interface ProjectConfiguration {

    12         public String getDisplayName();

    13     }

    14     // END: misuse.prjconfig.correct

    18     /* Following does not work:

    19     static {

    20         // BEGIN: misuse.prjconfig.correct.trivial.access

    21         ProjectConfigurationProvider<?> provider = null; // obtain elsewhere;

    22         provider.setActive(provider.getConfigurations()[0]);

    23         // END: misuse.prjconfig.correct.trivial.access

    24     }

    25     */

    27     static {

    28         // BEGIN: misuse.prjconfig.correct.access

    29         ProjectConfigurationProvider<?> provider = null; // obtain elsewhere;

    30         resetToZero(provider);

    31         // END: misuse.prjconfig.correct.access

    32     }

    34     // BEGIN: misuse.prjconfig.correct.openmethod

    35     private static <C extends ProjectConfiguration> void resetToZero(

    36         ProjectConfigurationProvider<C> provider

    37     ) {

    38         provider.setActive(provider.getConfigurations()[0]);

    39     }

    40     // END: misuse.prjconfig.correct.openmethod

    42     // BEGIN: misuse.prjconfig.correct.openclass

    43     static void workWithProjectConfigurationProvider(

    44         ProjectConfigurationProvider<?> p

    45     ) {

    46         ResetToZero<?> rtz = ResetToZero.create(p);

    47         rtz.obtainFirst();

    48         // after a while

    49         rtz.apply();

    50     }

    52     static class ResetToZero<C extends ProjectConfiguration> {

    53         C active;

    54         final ProjectConfigurationProvider<C> provider;

    56         ResetToZero(ProjectConfigurationProvider<C> provider) {

    57             this.provider = provider;

    58         }

    60         static <C extends ProjectConfiguration> ResetToZero<C> create(

    61             ProjectConfigurationProvider<C> p

    62         ) {

    63             return new ResetToZero<C>(p);

    64         }

    66         public void obtainFirst() {

    67             active = provider.getConfigurations()[0];

    68         }

    70         public void apply() {

    71             provider.setActive(active);

    72         }

    73     }

    74     // END: misuse.prjconfig.correct.openclass

    76 }

author	Jaroslav Tulach <jtulach@netbeans.org>
	Sat, 14 Jun 2008 09:56:12 +0200
changeset 132	3bc4c54f4bcc
parent 101	c27834b52df0
child 153	b5cbb797ec0a
permissions	-rw-r--r--