[jira] [Created] (TAP5-2376) Add a "switch" component

[Michael Wyraz (JIRA)]

Michael Wyraz created TAP5-2376:
-----------------------------------

             Summary: Add a "switch" component
                 Key: TAP5-2376
                 URL: https://issues.apache.org/jira/browse/TAP5-2376
             Project: Tapestry 5
          Issue Type: New Feature
          Components: tapestry-core
            Reporter: Michael Wyraz
            Priority: Trivial


Like the "if" component, a simple switch component should be added to the set 
of default components. The documentation in 
http://tapestry.apache.org/switching-cases.html should be changed accordingly.

Example:


import javax.inject.Inject;

import org.apache.tapestry5.Block;
import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.annotations.SupportsInformalParameters;

@SupportsInformalParameters
public class Switch
{
        @Parameter(required=true)
        protected String value;
        
        @Inject
        protected ComponentResources resources;
        
    Object beginRender(MarkupWriter writer)
    {
        if (value!=null)
        {
                Block block=resources.getBlockParameter(value);
                if (block!=null) return block;
        }
        
        return resources.getBody();
    }

    boolean beforeRenderBody()
    {
        return false;
    }
}





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