Context-class: Evaluation Contexts
In rsolr: R to Solr Interface
Context-class R Documentation
Evaluation Contexts
Description
The Context class is for representing contexts in which
expressions are evaluated. This might be an R environment, a database,
or some other external system.
Translation
Contexts play an important role in translation. When extracting an
object by name, the context can delegate to a
SymbolFactory to create a
Symbol object that is a lazy reference to the
object. The reference is expressed in the target language. If there is
no SymbolFactory, i.e., it has been set to NULL, then
evaluation is eager.
The intent is to decouple the type of the context from a particular
language, since a context could support the evaluation of multiple
languages. The accessors below effectively allow one to specify the
desired target language.
-
symbolFactory(x), symbolFactory(x) <- value: Get or
set the current SymbolFactory (may be NULL).
Author(s)
Michael Lawrence
rsolr documentation built on May 18, 2022, 9:07 a.m.
R Package Documentation
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Note that we can't provide technical support on individual packages. You should contact the package authors for that.
| Context-class | R Documentation |
Evaluation Contexts
Description
The Context class is for representing contexts in which
expressions are evaluated. This might be an R environment, a database,
or some other external system.
Translation
Contexts play an important role in translation. When extracting an
object by name, the context can delegate to a
SymbolFactory to create a
Symbol object that is a lazy reference to the
object. The reference is expressed in the target language. If there is
no SymbolFactory, i.e., it has been set to NULL, then
evaluation is eager.
The intent is to decouple the type of the context from a particular language, since a context could support the evaluation of multiple languages. The accessors below effectively allow one to specify the desired target language.
-
symbolFactory(x),symbolFactory(x) <- value: Get or set the currentSymbolFactory(may be NULL).
Author(s)
Michael Lawrence
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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