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From "Simone Tripodi (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SANDBOX-387) [BeanUtils2] Implement possibility to find out if a property readable and/or wirtable
Date Sun, 05 Feb 2012 21:21:59 GMT

    [ https://issues.apache.org/jira/browse/SANDBOX-387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13200903#comment-13200903
] 

Simone Tripodi commented on SANDBOX-387:
----------------------------------------

Good thought.

I honestly started to prefer much more compact and less explicit (and verbose) sentences,
like {{on( myBean ).set( "propertyName" ).with( valueObject )}}, (that involves actual APIs
change) so {{on( myBean ).isReadble( "propertyName" )}} is my preferred on.

Anyway,

{code}
if ( on( myBean ).isWritable( "propertyName" )
{
    on( myBean ).setProperty( "propertyName" ).withValue( "This is a String value!" );
}
{code}

looks less functional and redundant, we could move to a new option, something like (more or
less):

{code}
ifIsWritable( "propertyName" ).on( myBean ).set( "This is a String value!" );
{code}
                
> [BeanUtils2] Implement possibility to find out if a property readable and/or wirtable
> -------------------------------------------------------------------------------------
>
>                 Key: SANDBOX-387
>                 URL: https://issues.apache.org/jira/browse/SANDBOX-387
>             Project: Commons Sandbox
>          Issue Type: Improvement
>          Components: BeanUtils2
>    Affects Versions: Nightly Builds
>            Reporter: Benedikt Ritter
>
> Currently there is no possibility to find out, if a property is readable and/or writable.
> For example, one has to pass a value to {{setProperty(name).withValue(argument)}} and
hope, that the property is writeable (because a {{NoSucheMethodExcpetion}} will be thrown,
if it is not). For this reason it would be nice, if one could do something like:
> {code:java}
> if (on(myBean).isWritable("writeableProperty") {
>     on(myBean).setProperty("writableProperty").withValue("This is a String value!");
> }
> {code}
> Solution:
> * Add {{public boolean isWritable(String propertyName)}} and {{public boolean isReadable(String
propertyName)}} to {{BeanAccessor}}.
> * in {{isWritable()}} check if a {{PropertyDescriptor}} can be obtained from PropertyRegistry
(if not, throw {{NoSuchMethodException}}).
> ** if so, return true, if {{propertyDescriptor.getWriteMethod() != null}} and false otherwise.
> * in {{isReadable()}} check if a {{PropertyDescriptor}} can be obtained from PropertyRegistry
(if not, throw {{NoSuchMethodException}}).
> ** if so, return true, if {{propertyDescriptor.getReadMethod() != null}} and false otherwise.

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