public Object eval(Reader script, ScriptContext scriptContext) throws ScriptException {
Bindings bindings = scriptContext.getBindings(ScriptContext.ENGINE_SCOPE);
SlingScriptHelper helper = (SlingScriptHelper) bindings.get(SlingBindings.SLING);
if (helper == null) {
throw new ScriptException("SlingScriptHelper missing from bindings");
}
// ensure GET request
if (helper.getRequest() != null && !"GET".equals(helper.getRequest().getMethod())) {
throw new ScriptException("JRuby scripting only supports GET requests");
}
final ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
StringBuffer scriptString = new StringBuffer();
BufferedReader bufferedScript = new BufferedReader(script);
String nextLine = bufferedScript.readLine();
while (nextLine != null) {
scriptString.append(nextLine);
scriptString.append("\n");
nextLine = bufferedScript.readLine();
}
IRubyObject scriptRubyString = JavaEmbedUtils.javaToRuby(runtime, scriptString.toString());
IRubyObject erb =
(IRubyObject)
JavaEmbedUtils.invokeMethod(
runtime, erbModule, "new", new Object[] {scriptRubyString}, IRubyObject.class);
JavaEmbedUtils.invokeMethod(
runtime,
erb,
"set_props",
new Object[] {JavaEmbedUtils.javaToRuby(runtime, bindings)},
IRubyObject.class);
IRubyObject binding =
(IRubyObject)
JavaEmbedUtils.invokeMethod(
runtime, erb, "send", new Object[] {bindingSym}, IRubyObject.class);
scriptContext
.getWriter()
.write(
(String)
JavaEmbedUtils.invokeMethod(
runtime, erb, "result", new Object[] {binding}, String.class));
} catch (Throwable t) {
final ScriptException ex = new ScriptException("Failure running Ruby script:" + t);
ex.initCause(t);
throw ex;
} finally {
Thread.currentThread().setContextClassLoader(oldClassLoader);
}
return null;
}
/**
* Call Ruby's respond_to? to find out if the Ruby object responds to a method.
*
* @param rubyObject The ruby object in the Java side
* @param methodName The method name
* @return true if the ruby object responds to that method
*/
public boolean respondTo(Object rubyObject, String methodName) {
Object res =
JavaEmbedUtils.invokeMethod(
runtime, rubyObject, "respond_to?", new Object[] {methodName}, Object.class);
if (res instanceof Boolean) {
return (Boolean) res;
}
throw new RuntimeException("Problem calling respond_to?!");
}
@Before
public void setUp() {
this.ruby = Ruby.newInstance();
this.ruby.getLoadService().require("org/torquebox/web/component/mock_app");
RubyModule mockAppClass = this.ruby.getClassFromPath("MockApp");
this.rackApp =
(IRubyObject)
JavaEmbedUtils.invokeMethod(this.ruby, mockAppClass, "new", null, IRubyObject.class);
}
private Object callMethodImpl(
Object rubyObject, String methodName, Object[] params, Class<? extends Object> returnType) {
String[] s = methodName.split("\\.");
if (s.length == 1) {
return JavaEmbedUtils.invokeMethod(runtime, rubyObject, methodName, params, returnType);
} else {
String m1 = s[0]; // first method...
String m2 = getMethods(s); // remaining methods...
Object temp = JavaEmbedUtils.invokeMethod(runtime, rubyObject, m1, EMPTY, Object.class);
return callMethodImpl(temp, m2, params, returnType); // recursive...
}
}
private Block createBlock(AbstractBlock parent, String context, Map<String, Object> options) {
IRubyObject rubyClass = rubyRuntime.evalScriptlet("Asciidoctor::Block");
RubyHash convertMapToRubyHashWithSymbols =
RubyHashUtil.convertMapToRubyHashWithSymbols(rubyRuntime, options);
Object[] parameters = {
parent.delegate(), RubyUtils.toSymbol(rubyRuntime, context), convertMapToRubyHashWithSymbols
};
return (Block)
JavaEmbedUtils.invokeMethod(rubyRuntime, rubyClass, "new", parameters, Block.class);
}
@Close
public void close() {
try {
JavaEmbedUtils.invokeMethod(
_ruby, _transformerObject, "close", new Object[0], IRubyObject.class);
} catch (Exception e) {
logger.error("Failed to call close() on RubyTransformer", e);
}
try {
JavaEmbedUtils.terminate(_ruby);
} catch (Exception e) {
logger.error("Failed to terminate JRuby instance", e);
}
}
@Initialize
public void initialize() {
_ruby = JavaEmbedUtils.initialize(Collections.EMPTY_LIST);
_runtimeAdapter = JavaEmbedUtils.newRuntimeAdapter();
// load the class def
_runtimeAdapter.eval(_ruby, _code);
_transformerObject = _runtimeAdapter.eval(_ruby, "Transformer.new()");
logger.info("Evaluated Ruby code to: {}", _transformerObject);
JavaEmbedUtils.invokeMethod(
_ruby, _transformerObject, "init", new Object[0], IRubyObject.class);
}
public Object[] transform(InputRow row) {
Object[] inputValues = new Object[_inputValues.length];
for (int i = 0; i < inputValues.length; i++) {
Object value = row.getValue(_inputValues[i]);
inputValues[i] = value;
}
IRubyObject[] rubyInputValues = JavaUtil.convertJavaArrayToRuby(_ruby, inputValues);
IRubyObject rubyOutputCollector = JavaEmbedUtils.javaToRuby(_ruby, _rowCollector);
Object[] arguments = new Object[] {rubyInputValues, rubyOutputCollector};
JavaEmbedUtils.invokeMethod(_ruby, _transformerObject, "transform", arguments, Object.class);
return null;
}
@Test
public void testCall() throws Exception {
RackApplicationComponent component = new RackApplicationComponent(this.rackApp);
RackEnvironment env = mock(RackEnvironment.class);
RubyHash envHash = RubyHash.newHash(this.ruby);
when(env.getEnv()).thenReturn(envHash);
Object response = component.call(env);
assertNotNull(response);
RubyHash internalEnvHash =
(RubyHash)
JavaEmbedUtils.invokeMethod(this.ruby, this.rackApp, "env", null, RubyHash.class);
assertSame(envHash, internalEnvHash);
}
public void testExceptionsAcrossTheBridge() {
final IRubyObject wrappedThrower = JavaEmbedUtils.javaToRuby(runtime, new ExceptionThrower());
boolean exceptionThrown = false;
try {
// call throwException via JRuby
JavaEmbedUtils.invokeMethod(
runtime, wrappedThrower, "throwException", new Object[] {}, Object.class);
} catch (final RaiseException e) {
exceptionThrown = true;
final NativeException ne = (NativeException) e.getException();
final ExpectedException ee = (ExpectedException) ne.getCause();
assertEquals(
"The unpacked exception we receive should be the one we threw.",
ExceptionThrower.expectedException,
ee);
} finally {
assertTrue(
"Java Exception should have been thrown and wrapped as a RaiseException",
exceptionThrown);
}
}
public Inline createInline(
AbstractBlock parent,
String context,
String text,
Map<String, Object> attributes,
Map<String, Object> options) {
options.put(Options.ATTRIBUTES, attributes);
IRubyObject rubyClass = rubyRuntime.evalScriptlet("Asciidoctor::Inline");
RubyHash convertMapToRubyHashWithSymbols =
RubyHashUtil.convertMapToRubyHashWithSymbols(rubyRuntime, options);
Object[] parameters = {
parent.delegate(),
RubyUtils.toSymbol(rubyRuntime, context),
text,
convertMapToRubyHashWithSymbols
};
return (Inline)
JavaEmbedUtils.invokeMethod(rubyRuntime, rubyClass, "new", parameters, Inline.class);
}
