hg/apidesign: samples/misuse/src/org/apidesign/misuse/projectconfig/ProjectConfigurationCorrect.java@b5cbb797ec0a

     1 package org.apidesign.misuse.projectconfig;

     3 public class ProjectConfigurationCorrect {

     4     // BEGIN: misuse.prjconfig.correct

     5     interface ProjectConfigurationProvider<Configuration extends ProjectConfiguration> {

     6         Configuration[] getConfigurations();

     7         Configuration getActive();

     8         void setActive(Configuration c);

     9     }

    10     interface ProjectConfiguration {

    11         public String getDisplayName();

    12     }

    13     // END: misuse.prjconfig.correct

    17     /* Following does not work:

    18     static {

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

    20         ProjectConfigurationProvider<?> provider = null; // obtain from somewhere;

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

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

    23     }

    24     */

    26     static {

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

    28         ProjectConfigurationProvider<?> provider = null; // obtain from somewhere;

    29         resetToZero(provider);

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

    31     }

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

    34     private static <C extends ProjectConfiguration> void resetToZero(

    35         ProjectConfigurationProvider<C> provider

    36     ) {

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

    38     }

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

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

    42     static void workWithProjectConfigurationProvider(ProjectConfigurationProvider<?> p) {

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

    44         rtz.obtainFirst();

    45         // after a while

    46         rtz.apply();

    47     }

    49     static class ResetToZero<C extends ProjectConfiguration> {

    50         C active;

    51         final ProjectConfigurationProvider<C> provider;

    53         ResetToZero(ProjectConfigurationProvider<C> provider) {

    54             this.provider = provider;

    55         }

    57         static <C extends ProjectConfiguration> ResetToZero<C> create(ProjectConfigurationProvider<C> p) {

    58             return new ResetToZero<C>(p);

    59         }

    61         public void obtainFirst() {

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

    63         }

    65         public void apply() {

    66             provider.setActive(active);

    67         }

    68     }

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

    71 }

author	Jaroslav Tulach <jtulach@netbeans.org>
	Sat, 14 Jun 2008 09:58:08 +0200
changeset 153	b5cbb797ec0a
parent 132	3bc4c54f4bcc
child 154	0fd5e9c500b9
permissions	-rw-r--r--