marcel.lang.MarcelClassLoader Maven / Gradle / Ivy
package marcel.lang;
import java.io.File;
abstract public class MarcelClassLoader {
public Script loadScript(String className, File jarFile) throws ReflectiveOperationException {
return loadScript(className, jarFile, null);
}
/**
* Add the provided jar to the classpath, load the script class with the provided className and returns an instance of it.
* The caller of this method should
* be responsible for removing the jar from the classpath when needed
* @param className the class name
* @param jarFile the jar file
* @param binding the binding
* @return an instance of the script class loaded
* @throws ReflectiveOperationException in case a reflective error occurs when loading the script
*/
public Script loadScript(String className, File jarFile, Binding binding) throws ReflectiveOperationException {
// load the jar into the classpath
addJar(jarFile);
// and then load the class
Class clazz = getClassLoader().loadClass(className);
if (!Script.class.isAssignableFrom(clazz)) {
throw new IllegalArgumentException("The loaded class is not a script");
}
if (binding == null) {
return (Script) clazz.getDeclaredConstructor().newInstance();
} else {
return (Script) clazz.getDeclaredConstructor(Binding.class).newInstance(binding);
}
}
public Class loadClass(String name) throws ClassNotFoundException {
return getClassLoader().loadClass(name);
}
/**
* Adds the jar to the classpath
* @param jarFile the jar to add
*/
public abstract void addJar(File jarFile);
/**
* Remove the jar from the classpath. Note that this method might delete the file
* @param jarFile the jar to remove from the classpath
*/
public abstract boolean removeJar(File jarFile);
public abstract ClassLoader getClassLoader();
}