pnuts.ext
Class CachedScript

java.lang.Object
  pnuts.lang.Pnuts
      pnuts.ext.CachedScript

All Implemented Interfaces:

java.io.Serializable, Executable

public class CachedScript
extends Pnuts

Executable script that is automatically recompiled

See Also:

Serialized Form

Field Summary

protected java.lang.String	encoding
protected long	parsedTime
protected Pnuts	script
protected java.net.URL	scriptURL

Fields inherited from class pnuts.lang.Pnuts

pnuts_version, prompt, scriptSource, startNodes

Constructor Summary

CachedScript(java.net.URL scriptURL)
Constructor

CachedScript(java.net.URL scriptURL, java.lang.String encoding, Context context)
Constructor

Method Summary

java.lang.Object	accept(Visitor v, Context c) traverse the parsed tree with the specified Visitor and Context
protected Compiler	getCompiler() Returns a compiler.
protected boolean	needToUpdate() Determin if the script should be recompiled
java.lang.Object	run(Context c) Executes a Pnuts object with the specified Context
java.lang.String	unparse() Obtain the script code from a parsed object
protected void	update(Context context) Parse/compile the script and update the timestamp.

Methods inherited from class pnuts.lang.Pnuts

accept, createClassLoader, createClassLoader, eval, evalDepth, format, get, get, getDefaults, getResource, getScriptSource, isJava2, isVerbose, load, load, load, load, load, load, loadClass, loadFile, parse, parse, parse, parse, parse, parse, require, require, set, set, setDefaults, setPrompt, setScriptSource, setVerbose, unparse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

scriptURL

protected java.net.URL scriptURL

parsedTime

protected long parsedTime

script

protected Pnuts script

encoding

protected java.lang.String encoding

Constructor Detail

CachedScript

public CachedScript(java.net.URL scriptURL)
             throws java.io.IOException,
                    ParseException

Constructor

Parameters:

scriptURL - the URL of the script

Throws:

java.io.IOException

ParseException

CachedScript

public CachedScript(java.net.URL scriptURL,
                    java.lang.String encoding,
                    Context context)
             throws java.io.IOException,
                    ParseException

Constructor

Parameters:

scriptURL - the URL of the script

encoding - the character encoding of the script. If null, the default encoding is used.

context - the context in which the script is first parsed/compiled.

Throws:

java.io.IOException

ParseException

Method Detail

unparse

public java.lang.String unparse()

Description copied from class: Pnuts

Obtain the script code from a parsed object

Overrides:

unparse in class Pnuts

Returns:

the script code

run

public java.lang.Object run(Context c)

Description copied from class: Pnuts

Executes a Pnuts object with the specified Context

Specified by:

run in interface Executable

Overrides:

run in class Pnuts

Parameters:

c - the Context

Returns:

the result

accept

public java.lang.Object accept(Visitor v,
                               Context c)

Description copied from class: Pnuts

traverse the parsed tree with the specified Visitor and Context

Overrides:

accept in class Pnuts

c - the Context

Returns:

the result

needToUpdate

protected boolean needToUpdate()

Determin if the script should be recompiled

Returns:

true if the script should be recompiled

getCompiler

protected Compiler getCompiler()

Returns a compiler. If this method returns null, script won't be compiled.

update

protected void update(Context context)
               throws java.io.IOException,
                      ParseException

Parse/compile the script and update the timestamp.

Parameters:

context - the context in which the script is compiled.

Throws:

java.io.IOException

ParseException