Package org.mozilla.javascript

Interface Evaluator

All Known Implementing Classes:

Codegen, Interpreter

public interface Evaluator

Abstraction of evaluation, which can be implemented either by an interpreter or compiler.

Method Summary

Modifier and Type	Method	Description
void	captureStackInfo(RhinoException ex)	Capture stack information from the given exception.
Object	compile(CompilerEnvirons compilerEnv, ScriptNode tree, String encodedSource, boolean returnFunction)	Compile the script or function from intermediate representation tree into an executable form.
Function	createFunctionObject(Context cx, Scriptable scope, Object bytecode, Object staticSecurityDomain)	Create a function object.
Script	createScriptObject(Object bytecode, Object staticSecurityDomain)	Create a script object.
String	getPatchedStack(RhinoException ex, String nativeStackTrace)	Given a native stack trace, patch it with script-specific source and line information
List<String>	getScriptStack(RhinoException ex)	Get the script stack for the given exception
String	getSourcePositionFromStack(Context cx, int[] linep)	Get the source position information by examining the stack.
void	setEvalScriptFlag(Script script)	Mark the given script to indicate it was created by a call to eval() or to a Function constructor.

Method Detail

compile

Object compile(CompilerEnvirons compilerEnv,
               ScriptNode tree,
               String encodedSource,
               boolean returnFunction)

Compile the script or function from intermediate representation tree into an executable form.

Parameters:

compilerEnv - Compiler environment

tree - parse tree

encodedSource - encoding of the source code for decompilation

returnFunction - if true, compiling a function

Returns:

an opaque object that can be passed to either createFunctionObject or createScriptObject, depending on the value of returnFunction

createFunctionObject

Function createFunctionObject(Context cx,
                              Scriptable scope,
                              Object bytecode,
                              Object staticSecurityDomain)

Create a function object.

Parameters:

cx - Current context

scope - scope of the function

bytecode - opaque object returned by compile

staticSecurityDomain - security domain

Returns:

Function object that can be called

createScriptObject

Script createScriptObject(Object bytecode,
                          Object staticSecurityDomain)

Create a script object.

Parameters:

bytecode - opaque object returned by compile

staticSecurityDomain - security domain

Returns:

Script object that can be evaluated

captureStackInfo

void captureStackInfo(RhinoException ex)

Capture stack information from the given exception.

Parameters:

ex - an exception thrown during execution

getSourcePositionFromStack

String getSourcePositionFromStack(Context cx,
                                  int[] linep)

Get the source position information by examining the stack.

Parameters:

cx - Context

linep - Array object of length >= 1; getSourcePositionFromStack will assign the line number to linep[0].

Returns:

the name of the file or other source container

getPatchedStack

String getPatchedStack(RhinoException ex,
                       String nativeStackTrace)

Given a native stack trace, patch it with script-specific source and line information

Parameters:

ex - exception

nativeStackTrace - the native stack trace

Returns:

patched stack trace

getScriptStack

List<String> getScriptStack(RhinoException ex)

Get the script stack for the given exception

Parameters:

ex - exception from execution

Returns:

list of strings for the stack trace

setEvalScriptFlag

void setEvalScriptFlag(Script script)

Mark the given script to indicate it was created by a call to eval() or to a Function constructor.

Parameters:

script - script to mark as from eval