Test whether the provided subject can read an object.

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Description

Using the AccessPolicy, tests whether the subject has read permission for the object. This method is meant work prior to submission to a repository, and will show the permissions that would be enfirced by the repository on submission. Currently it only uses the AccessPolicy to determine who can read (and not the rightsHolder field, which always can read an object). If an object has been granted read access by the special "public" subject, then all subjects have read access.

Usage

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canRead(x, ...)

## S4 method for signature 'DataObject'
canRead(x, subject)

Arguments

x

DataObject

...

Additional arguments

subject

: the subject name of the person/system to check for read permissions

Details

The subject name used in both the AccessPolicy and in the 'subject' argument to this method is a string value, but is generally formatted as an X.509 name formatted according to RFC 2253.

Value

boolean TRUE if the subject has read permission, or FALSE otherwise

See Also

DataObject-class

Examples

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data <- charToRaw("1,2,3\n4,5,6\n")
obj <- new("DataObject", id="1234", data=data, format="text/csv")
obj <- addAccessRule(obj, "smith", "read")
access <- canRead(obj, "smith")

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