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

Methods

Modifier and Type	Method and Description
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