public class JsScriptEngine extends ScriptEngine
ScriptEngine implementation for JavaScriptScriptEngine.SupportedScriptLangNAMESPACE_SEPARATOR| Constructor and Description |
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JsScriptEngine() |
| Modifier and Type | Method and Description |
|---|---|
protected Object |
eval(String expr) |
static JsScriptEngine |
getInstance() |
protected Map<String,Object> |
getParamsFromVariables()
Returns a map from local variable names to their values
|
protected String |
getScriptingLang()
Gets ScriptEngine classname or keyword for the scripting language
|
Object |
jsCall(String functionName,
Object[] passedParams)
call a javascript function
|
Object |
jsEval(String name,
Reader scriptReader)
evaluate javascript from a reader
|
Object |
jsEval(String name,
String script)
evaluate a javascript String
|
org.mozilla.javascript.Scriptable |
jsNewArray(long size)
creates a new javascript array
|
org.mozilla.javascript.Scriptable |
jsNewObject()
creates a new JavaScript object
|
void |
jsPut(String name,
Object value)
put a value in the current scope
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protected void |
load(String name,
InputStream script) |
protected Map<String,List<PigStats>> |
main(PigContext pigContext,
String scriptFile)
Actually runs the script file.
|
void |
registerFunctions(String path,
String namespace,
PigContext pigContext)
Registers scripting language functions as Pig functions with given namespace
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getInstance, getJarPath, getPigStatsMap, getScriptAsStream, getSupportedScriptLang, runpublic static JsScriptEngine getInstance()
public Object jsEval(String name, String script)
name - the name of the script (for error messages)script - the content of the scriptpublic Object jsEval(String name, Reader scriptReader)
name - the name of the script (for error messages)scriptReader - the content of the scriptpublic void jsPut(String name, Object value)
name - the name of the variablevalue - its valuepublic Object jsCall(String functionName, Object[] passedParams)
functionName - the name of the functionpassedParams - the parameters to passpublic org.mozilla.javascript.Scriptable jsNewObject()
public org.mozilla.javascript.Scriptable jsNewArray(long size)
size - the size of the arrayprotected void load(String name, InputStream script)
protected Map<String,List<PigStats>> main(PigContext pigContext, String scriptFile) throws IOException
ScriptEnginemain in class ScriptEnginepigContext - ScriptPigContext to run the script filescriptFile - the fileIOExceptionpublic void registerFunctions(String path, String namespace, PigContext pigContext) throws IOException
ScriptEngineregisterFunctions in class ScriptEnginepath - path of the scriptnamespace - namespace for the functionspigContext - pigcontext to register functions to pig in the given namespaceIOExceptionprotected Map<String,Object> getParamsFromVariables() throws IOException
ScriptEnginegetParamsFromVariables in class ScriptEngineIOExceptionprotected String getScriptingLang()
ScriptEnginegetScriptingLang in class ScriptEngineCopyright © 2007-2017 The Apache Software Foundation