Method initInstance

src/bsh/ClassGeneratorUtil.java:903–1000

Initialize an instance of the class. This method is called from the generated class constructor to evaluate the instance initializer and scripted constructor in the instance namespace.

(GeneratedClass instance, String className, Object[] args)

	 * namespace.
	 */
	public static void initInstance(GeneratedClass instance, String className, Object[] args) {
		Class[] sig = Types.getTypes(args);
		CallStack callstack = new CallStack();
		Interpreter interpreter;
		NameSpace instanceNameSpace;

		// check to see if the instance has already been initialized
		// (the case if using a this() alternate constuctor)
		// todo PeJoBo70 write test for this
		This instanceThis = getClassInstanceThis(instance, className);

		// XXX clean up this conditional
		if (instanceThis == null) {
			// Create the instance 'This' namespace, set it on the object
			// instance and invoke the instance initializer

			// Get the static This reference from the proto-instance
			This classStaticThis = getClassStaticThis(instance.getClass(), className);
			interpreter = CONTEXT_INTERPRETER.get();
			if (interpreter == null) {
				interpreter = classStaticThis.declaringInterpreter;
			}


			// Get the instance initializer block from the static This
			BSHBlock instanceInitBlock;
			try {
				instanceInitBlock = (BSHBlock) classStaticThis.getNameSpace().getVariable(BSHINIT);
			} catch (Exception e) {
				throw new InterpreterError("unable to get instance initializer: " + e);
			}

			// Create the instance namespace
			if (CONTEXT_NAMESPACE.get() != null) {
				instanceNameSpace = classStaticThis.getNameSpace().copy();
				instanceNameSpace.setParent(CONTEXT_NAMESPACE.get());
			} else {
				instanceNameSpace = new NameSpace(classStaticThis.getNameSpace(), className); // todo: old code
			}
			instanceNameSpace.isClass = true;

			// Set the instance This reference on the instance
			instanceThis = instanceNameSpace.getThis(interpreter);
			try {
				LHS lhs = Reflect.getLHSObjectField(instance, BSHTHIS + className);
				lhs.assign(instanceThis, false/*strict*/);
			} catch (Exception e) {
				throw new InterpreterError("Error in class gen setup: " + e);
			}

			// Give the instance space its object import
			instanceNameSpace.setClassInstance(instance);

			// should use try/finally here to pop ns
			callstack.push(instanceNameSpace);

			// evaluate the instance portion of the block in it
			try { // Evaluate the initializer block