pnuts.lang
Interface Implementation

All Known Implementing Classes:

CachedPnutsImpl, CompilerPnutsImpl, ImplementationAdapter, JAASPnutsImpl, PnutsImpl, PnutsImplAdapter, SecurePnutsImpl

public interface Implementation

Defines an abstract interface of script interpreter's implementation,

See Also:

Context.setImplementation(Implementation), Context.getImplementation()

Method Summary

java.lang.Object	accept(SimpleNode node, Context context) Interpret an AST
java.lang.Object	eval(java.lang.String expr, Context context) Evaluate an expreesion
java.lang.Object	load(java.lang.String file, Context context) Load a script file using classloader
java.lang.Object	load(java.net.URL scriptURL, Context context) Load a script file from a URL
java.lang.Object	loadFile(java.lang.String filename, Context context) Load a script file from local file system

Method Detail

eval

java.lang.Object eval(java.lang.String expr,
                      Context context)

Evaluate an expreesion

Parameters:

expr - the expression to be evaluated

context - the context in which the expression is evaluated

Returns:

the result of the evaluation

loadFile

java.lang.Object loadFile(java.lang.String filename,
                          Context context)
                          throws java.io.FileNotFoundException

Load a script file from local file system

Parameters:

filename - the file name of the script

context - the context in which the expression is evaluated

Returns:

the result of the evaluation

Throws:

java.io.FileNotFoundException

load

java.lang.Object load(java.lang.String file,
                      Context context)
                      throws java.io.FileNotFoundException

Load a script file using classloader

Parameters:

file - the name of the script

context - the context in which the script is executed

Returns:

the result of the evaluation

Throws:

java.io.FileNotFoundException

load

java.lang.Object load(java.net.URL scriptURL,
                      Context context)

Load a script file from a URL

Parameters:

scriptURL - the URL of the script

context - the context in which the script is executed

Returns:

the result of the evaluation

accept

java.lang.Object accept(SimpleNode node,
                        Context context)

Interpret an AST

Parameters:

node - the AST

context - the context in which the AST is interpreted