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package org.jruby.runtime.load;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.jruby.Ruby;
import org.jruby.ast.executable.Script;
import org.jruby.util.ClassCache.OneShotClassLoader;
import org.jruby.util.JRubyClassLoader;
import org.objectweb.asm.ClassReader;
/**
*
* @author headius
*/
public class CompiledScriptLoader {
public static Script loadScriptFromFile(Ruby runtime, InputStream inStream, String resourceName) {
InputStream in = null;
try {
in = new BufferedInputStream(inStream, 8192);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[8196];
int read = 0;
while ((read = in.read(buf)) != -1) {
baos.write(buf, 0, read);
}
buf = baos.toByteArray();
JRubyClassLoader jcl = runtime.getJRubyClassLoader();
OneShotClassLoader oscl = new OneShotClassLoader(jcl);
ClassReader cr = new ClassReader(buf);
String className = cr.getClassName().replace('/', '.');
Class clazz = oscl.defineClass(className, buf);
// if it's a compiled JRuby script, instantiate and run it
if (Script.class.isAssignableFrom(clazz)) {
return (Script)clazz.newInstance();
} else {
throw runtime.newLoadError("use `java_import' to load normal Java classes: "+className);
}
} catch (IOException e) {
throw runtime.newIOErrorFromException(e);
} catch (InstantiationException ie) {
if (runtime.getDebug().isTrue()) {
ie.printStackTrace();
}
throw runtime.newLoadError("Error loading compiled script '" + resourceName + "': " + ie);
} catch (IllegalAccessException iae) {
if (runtime.getDebug().isTrue()) {
iae.printStackTrace();
}
throw runtime.newLoadError("Error loading compiled script '" + resourceName + "': " + iae);
} catch (LinkageError le) {
if (runtime.getDebug().isTrue()) {
le.printStackTrace();
}
throw runtime.newLoadError("Linkage error loading compiled script; you may need to recompile '" + resourceName + "': " + le);
} finally {
try {
in.close();
} catch (IOException ioe) {
throw runtime.newIOErrorFromException(ioe);
}
}
}
}