/**
* Evaluates a script.
*
* @param script string representation of the script to evaluate.
* @param sourceName the name of the evaluated script.
* @return evaluated object.
* @throws IOException if the script couldn't be retrieved.
*/
public Object evaluate(final String script, final String sourceName) {
if (script == null) {
throw new IllegalArgumentException("script cannot be null");
}
try {
return context.evaluateString(scope, script, sourceName, 1, null);
} catch (final JavaScriptException e) {
LOG.error("JavaScriptException occured: " + e.getMessage());
throw e;
}
}
/**
* Evaluates a script from a reader.
*
* @param reader {@link Reader} of the script to evaluate.
* @param sourceName the name of the evaluated script.
* @return evaluated object.
* @throws IOException if the script couldn't be retrieved.
*/
public Object evaluate(final Reader reader, final String sourceName) throws IOException {
if (reader == null) {
throw new IllegalArgumentException("reader cannot be null");
}
try {
return context.evaluateReader(scope, reader, sourceName, 1, null);
} catch (final JavaScriptException e) {
LOG.error("JavaScriptException occured: " + e.getMessage());
throw e;
} finally {
reader.close();
}
}
/**
* Evaluate JavaScript source.
*
* @param cx the current context
* @param filename the name of the file to compile, or null for interactive mode.
*/
private void processSource(Context cx, String filename) {
if (filename == null) {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String sourceName = "<stdin>";
int lineno = 1;
boolean hitEOF = false;
do {
int startline = lineno;
System.err.print("js> ");
System.err.flush();
try {
String source = "";
// Collect lines of source to compile.
while (true) {
String newline;
newline = in.readLine();
if (newline == null) {
hitEOF = true;
break;
}
source = source + newline + "\n";
lineno++;
// Continue collecting as long as more lines
// are needed to complete the current
// statement. stringIsCompilableUnit is also
// true if the source statement will result in
// any error other than one that might be
// resolved by appending more source.
if (cx.stringIsCompilableUnit(source)) {
break;
}
}
Object result = cx.evaluateString(this, source, sourceName, startline, null);
if (result != Context.getUndefinedValue()) {
System.err.println(Context.toString(result));
}
} catch (WrappedException we) {
// Some form of exception was caught by JavaScript and
// propagated up.
System.err.println(we.getWrappedException().toString());
we.printStackTrace();
} catch (EvaluatorException ee) {
// Some form of JavaScript error.
System.err.println("js: " + ee.getMessage());
} catch (JavaScriptException jse) {
// Some form of JavaScript error.
System.err.println("js: " + jse.getMessage());
} catch (IOException ioe) {
System.err.println(ioe.toString());
}
if (quitting) {
// The user executed the quit() function.
break;
}
} while (!hitEOF);
System.err.println();
} else {
FileReader in = null;
try {
in = new FileReader(filename);
} catch (FileNotFoundException ex) {
Context.reportError("Couldn't open file \"" + filename + "\".");
return;
}
try {
// Here we evalute the entire contents of the file as
// a script. Text is printed only if the print() function
// is called.
cx.evaluateReader(this, in, filename, 1, null);
} catch (WrappedException we) {
System.err.println(we.getWrappedException().toString());
we.printStackTrace();
} catch (EvaluatorException ee) {
System.err.println("js: " + ee.getMessage());
} catch (JavaScriptException jse) {
System.err.println("js: " + jse.getMessage());
} catch (IOException ioe) {
System.err.println(ioe.toString());
} finally {
try {
in.close();
} catch (IOException ioe) {
System.err.println(ioe.toString());
}
}
}
}
