JsScript - Reference Documentation
Class implementing support for compiling and running script fragments
Index of Methods
Constructor
Prototype
JsScript(String filename)
JsScript(String filename, Number lineno, String source)
Description
Compile script.Arguments
| Type | Name | Description |
|---|---|---|
String
|
filename | Name of file containing the script |
Number
|
lineno | Starting line number (1 = first line) |
String
|
source | The source code |
Exceptions
| Name | Value | Description |
|---|---|---|
| GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call |
| GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call |
| GPError | GPError.INVALID_TYPE | Type of argument is invalid for call |
Example
var scriptsource = 'globalvar = 123; var localvar = 456;function f() { return 1};';
var s = new JsScript("sample", 1, scriptsource);
newDynamicScope()
Prototype
void newDynamicScope(String constructor)
Description
Create a new dynamic scope using the given constructor function.
A dynamic scope inherits all predefined top level functions and properties, but is otherwise a clean top level scope. Use this to create a runtime environment to execute scripts.
Arguments
| Type | Name | Description |
|---|---|---|
String
|
constructor | The name of the constructor function for the scope |
Return
Object
|
A new dynamic scope derived from the top level scope |
Exceptions
| Name | Value | Description |
|---|---|---|
| GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call |
| GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call |
| GPError | GPError.INVALID_TYPE | Type of argument is invalid for call |
Example
var scope = JsScript.newDynamicScope("Object");
execute()
Prototype
Object execute(Object scope)
Object execute(Object scope, String cwd)
Description
Execute script within the defined scope object.
The caller may specify a current working directory (cwd) which is used when executing the script. If not specified, then the current working directory of the calling script is used.
Arguments
| Type | Name | Description |
|---|---|---|
Object
|
scope | The top level scope object for script execution. |
Object
|
cwd | The current working directory to use. |
Return
Object
|
The result of evaluating the script, i.e. the last assignment or function return in the code. |
Exceptions
| Name | Value | Description |
|---|---|---|
| GPError | GPError.ARGUMENTS_MISSING | Too few arguments in call |
| GPError | GPError.INVALID_ARGUMENTS | Too many arguments in call |
| GPError | GPError.INVALID_TYPE | Type of argument is invalid for call |
Example
s.execute(scope);
assert(typeof(globalvar) == "undefined");
assert(typeof(scope.globalvar) != "undefined");
var thisdir = GPSystem.mapFilename("", GPSystem.CWD);
var subdir = GPSystem.mapFilename("scriptdir", GPSystem.CWD);
var s = new JsScript(subdir + "/test.js");
// Execute script with current directory of this script
// The script will set the global variable cwd
s.execute(this);
assert(thisdir == cwd);
// Execute script with subdirectory relative to this script
s.execute(this, subdir);
assert(subdir == cwd);
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