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Java Source Code / Java Documentation » Scripting » oscript 2.10.4 » oscript

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

oscript .OscriptInterpreter

All known Subclasses:   oscript .Main,
OscriptInterpreter
public class OscriptInterpreter (Code)
The toplevel and main interface for the interpreter. There can only be one instance of this object. The scope object can be used to create logically isolated interpreter "instances".
This does need some cleanup, and perhaps should be a front-end for other stuff someone embedding this in an application might want, such as creating a new scope...
Description of properties that are interesting:

property description regular default webstart default

oscript.cache.path where the cache directory is created $CWD/.cache $HOME/.cache

oscript.cwd the current working directory $CWD $HOME/Desktop || $HOME

author:
   Rob Clark (rob@ti.com)

Inner Class :public static class CacheEntry

Field Summary
final public static String CACHE_VERSION
     the CACHE_VERSION should change any time a change is made in the interpreter that could cause incompatibility with previously serialized cache entries.
public static Value DEFAULT_ARRAY_SORT_COMPARISION_FXN

final public static NodeEvaluator EMPTY_EXPR_LIST_EVALUATOR

public static long et


Method Summary
final public static void __declareInScope(String name, Value val, Scope scope)

final public static Value __eval(String str)

final public static Value __eval(String str, Scope scope)

public static void addParser(Parser parser)
     Add the parser to list of recognized parsers.
public static void addScriptPath(String path)
     Add the specified path to the paths that are searched to import a file.
public static NodeEvaluator createNodeEvaluator(String name, Node node)
     Create a NodeEvaluator to evaluate a node.
public static Value eval(AbstractFile file)
     Evaluate from the specified abstract file.
public static Value eval(AbstractFile file, Scope scope)
     Evaluate from the specified abstract file.
public static Value eval(String str)
     Evaluate the specified sting.
public static Value eval(String str, Scope scope)
     Evaluate the specified sting.
static void flushNodeEvaluatorCache()
     Flush the node-evaluator-cache...
public static Scope getGlobalScope()
     Get the global scope object.
public static Iterator getScriptPath()
     Return an iterator of entries in the script-path.
public static String getVersionString()
     Get a descriptive version string.
public static Value importHelper(String path, Scope scope)
     helper function to implement import statements.
public static Class loadClassFromCache(String className)

final public static void mountJarFile(AbstractFile file)

public static Node parse(AbstractFile file)
     Parse the input stream to a syntaxtree.
public static Node parse(String str)
     Parse the string to a syntaxtree.
public static void registerClassLoader(ClassLoader loader)
     Register a class loader that we can delegate the act of resolving classes.
public static void removeParser(Parser parser)
     Remove the parser from list of recognized parsers.
public static void removeScriptPath(String path)
     Remove the specified path to the paths that are searched to import a file.
public static AbstractFile resolve(String path, boolean create)
     Try to load the specified file from one of the registered filesystems.
public static void setErr(PrintStream err)
     Set the error stream.
public static void setIn(InputStream in)
     Set the input stream.
public static void setOut(PrintStream out)
     Set the output stream.
public static void useCompiler(boolean useCompiler)
     Set whether the compiler should be used or not.

Field Detail
CACHE_VERSION
final public static String CACHE_VERSION(Code)
the CACHE_VERSION should change any time a change is made in the interpreter that could cause incompatibility with previously serialized cache entries. It is made part of the path to serialized cache entry, so entries serialized with different cache versions will not conflict.

DEFAULT_ARRAY_SORT_COMPARISION_FXN
public static Value DEFAULT_ARRAY_SORT_COMPARISION_FXN(Code)

EMPTY_EXPR_LIST_EVALUATOR
final public static NodeEvaluator EMPTY_EXPR_LIST_EVALUATOR(Code)

et
public static long et(Code)

Method Detail
__declareInScope
final public static void __declareInScope(String name, Value val, Scope scope)(Code)

__eval
final public static Value __eval(String str) throws ParseException(Code)

__eval
final public static Value __eval(String str, Scope scope) throws ParseException(Code)

addParser
public static void addParser(Parser parser)(Code)
Add the parser to list of recognized parsers. The registered parsers will determine what sorts of input the interpreter can handle.
Parameters:
  parser - the parser to register
See Also:   OscriptInterpreter.removeParser

addScriptPath
public static void addScriptPath(String path)(Code)
Add the specified path to the paths that are searched to import a file.
Parameters:
  path - a path to search for imports

createNodeEvaluator
public static NodeEvaluator createNodeEvaluator(String name, Node node)(Code)
Create a NodeEvaluator to evaluate a node. An application embedding the interpreter should use this method to convert the parsed syntax tree to something that can be evaluated within a scope, rather than directly using the visitors. This protects the application against changes to the parsed representation of the program.
Parameters:
  desc - description
Parameters:
  node - the node a NodeEvaluator

eval
public static Value eval(AbstractFile file) throws ParseException, IOException(Code)
Evaluate from the specified abstract file. The stream is evaluated until EOF is hit.
Parameters:
  file - the file to evaluate the result of evaluating the input
throws:
  ParseException - if error parsing input
throws:
  IOException - if something goes poorly when reading file

eval
public static Value eval(AbstractFile file, Scope scope) throws ParseException, IOException(Code)
Evaluate from the specified abstract file. The stream is evaluated until EOF is hit.
Parameters:
  file - the file to evaluate
Parameters:
  scope - the scope to evaluate in the result of evaluating the input
throws:
  ParseException - if error parsing input
throws:
  IOException - if something goes poorly when reading file

eval
public static Value eval(String str) throws ParseException(Code)
Evaluate the specified sting.
Parameters:
  str - the string to evaluate the result of evaluating the string
throws:
  ParseException - if error parsing string

eval
public static Value eval(String str, Scope scope) throws ParseException(Code)
Evaluate the specified sting.
Parameters:
  str - the string to evaluate
Parameters:
  scope - the scope to evaluate in the result of evaluating the string
throws:
  ParseException - if error parsing string

flushNodeEvaluatorCache
static void flushNodeEvaluatorCache()(Code)
Flush the node-evaluator-cache...

getGlobalScope
public static Scope getGlobalScope()(Code)
Get the global scope object. The globalScope is static, meaning that all script code in an application shares a single global scope. But, since the interpreter is multi-threaded, you can achieve the same effect of having multiple interpreter instances by creating a new level of scope (ie with globalScope as it's parent, an evaluate within that scope. the globalScope object

getScriptPath
public static Iterator getScriptPath()(Code)
Return an iterator of entries in the script-path. Each entry is a path that is prefixed to a relative path passed to OscriptInterpreter.resolve in the process of trying to resolve a file. an iterator of strings

getVersionString
public static String getVersionString()(Code)
Get a descriptive version string.

importHelper
public static Value importHelper(String path, Scope scope)(Code)
helper function to implement import statements.

loadClassFromCache
public static Class loadClassFromCache(String className) throws ClassNotFoundException(Code)

mountJarFile
final public static void mountJarFile(AbstractFile file) throws Exception(Code)
Mount a .jar file under /jar/file.jar and add to script path
Parameters:
  file - the jar file to mount

parse
public static Node parse(AbstractFile file) throws ParseException, IOException(Code)
Parse the input stream to a syntaxtree.
Parameters:
  file - the file to parse the parsed syntaxtree

parse
public static Node parse(String str) throws ParseException(Code)
Parse the string to a syntaxtree.
Parameters:
  str - the string to parse the parsed syntaxtree

registerClassLoader
public static void registerClassLoader(ClassLoader loader)(Code)
Register a class loader that we can delegate the act of resolving classes. This allows the user of ObjectScript to give us the ability to load classes that we might not otherwise have access to.

removeParser
public static void removeParser(Parser parser)(Code)
Remove the parser from list of recognized parsers. The registered parsers will determine what sorts of input the interpreter can handle.
Parameters:
  parser - the parser to register
See Also:   OscriptInterpreter.addParser

removeScriptPath
public static void removeScriptPath(String path)(Code)
Remove the specified path to the paths that are searched to import a file.
Parameters:
  path - a path to search for imports

resolve
public static AbstractFile resolve(String path, boolean create) throws IOException(Code)
Try to load the specified file from one of the registered filesystems.
Parameters:
  path - the path to the file to resolve
Parameters:
  create - create the file if it does not exist
throws:
  IOException - if something goes wrong when reading file
See Also:   OscriptInterpreter.addScriptPath

setErr
public static void setErr(PrintStream err)(Code)
Set the error stream.
Parameters:
  err - the stream to use for error output

setIn
public static void setIn(InputStream in)(Code)
Set the input stream.
Parameters:
  in - the stream to use for input

setOut
public static void setOut(PrintStream out)(Code)
Set the output stream.
Parameters:
  out - the stream to use for output

useCompiler
public static void useCompiler(boolean useCompiler)(Code)
Set whether the compiler should be used or not.
Parameters:
  useCompiler - iff true, enabled compiler, otherwiseuse only the interpreter

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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