КиваКит Фрагмент #11

Jan 04 2023

Подробнее о KivaKit https://state-of-the-art.org/https://www.

Код

package com.telenav.kivakit.snippets;

import com.telenav.kivakit.core.language.trait.TryTrait;
import com.telenav.kivakit.core.messaging.listeners.MessageList;

import static com.telenav.kivakit.core.collections.list.StringList.stringList;

public class Snippet11 extends BaseSnippet implements TryTrait
{
    public static void main(String[] args)
    {
        new Snippet11().run();
    }

    @Override
    protected Object onSnippet()
    {
        var issues = new MessageList();
        var results = stringList();

        issues.listenTo(this);

        // 1, 2
        results.add("x = " + tryCatch(this::x));
        results.add("y = " + tryCatch(this::y));

        // 3, 4
        results.add("x = " + tryCatchDefault(this::x, -1));
        results.add("y = " + tryCatchDefault(this::y, -1));

        // 5, 6
        results.add("x = " + tryCatch(this::x, "Failed to x()"));
        results.add("y = " + tryCatch(this::y, "Failed to y()"));

        // 7
        results.addAll(issues.formatted());
        issues.clear();

        // 8
        results.add("x = " + tryCatchThrow(this::x, "Failed to x(): rethrowing"));
        try
        {
            results.add("y = " + tryCatchThrow(this::y, "Failed to y(): rethrowing"));
        }
        catch (Exception e)
        {
            // 9
            results.add("Caught rethrown exception");
        }

        // 10
        results.addAll(issues.formatted());
        issues.clear();

        return results.numbered().titledBox("Results");
    }

    private int x()
    {
        return 3;
    }

    private int y()
    {
        throw new IllegalStateException("Error in y()");
    }
}



      
                
                    
                    
       Output
      
                
            
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫ Results ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┋ 1. x = 3                                                                               ┋
┋ 2. y = null                                                                            ┋
┋ 3. x = 3                                                                               ┋
┋ 4. y = -1                                                                              ┋
┋ 5. x = 3                                                                               ┋
┋ 6. y = null                                                                            ┋
┋ 7. Failed to y(): Error in y()                                                         ┋
┋ Exception in thread "main"java.lang.IllegalStateException: Error in y()                ┋
┋     at com.telenav.kivakit.snippets.Snippet11.y(Snippet11.java:66)                     ┋
┋     at com.telenav.kivakit.core.language.trait.TryTrait.tryCatch(TryTrait.java:67)     ┋
┋     at com.telenav.kivakit.snippets.Snippet11.onSnippet(Snippet11.java:33)             ┋
┋     at com.telenav.kivakit.snippets.BaseSnippet.run(BaseSnippet.java:10)               ┋
┋     at com.telenav.kivakit.snippets.Snippet11.main(Snippet11.java:12)                  ┋
┋ 8. x = 3                                                                               ┋
┋ 9. Caught rethrown exception                                                           ┋
┋ 10. Failed to y(): rethrowing: Error in y()                                            ┋
┋ Exception in thread "main"java.lang.IllegalStateException: Error in y()                ┋
┋     at com.telenav.kivakit.snippets.Snippet11.y(Snippet11.java:66)                     ┋
┋     at com.telenav.kivakit.core.language.trait.TryTrait.tryCatchThrow(TryTrait.java:11 ┋
┋ 2)                                                                                     ┋
┋     at com.telenav.kivakit.snippets.Snippet11.onSnippet(Snippet11.java:44)             ┋
┋     at com.telenav.kivakit.snippets.BaseSnippet.run(BaseSnippet.java:10)               ┋
┋     at com.telenav.kivakit.snippets.Snippet11.main(Snippet11.java:12)                  ┋
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛