反编译类还原

读一源码时，反编译后如下：  private Object eval(SimpleNode node, NameSpace nameSpace, CallStack callstack, Interpreter localInterpreter)
        throws ParseException, EvalError
    {
        Object retVal = null;
          goto _L1
_L3:
        if(TRACE)
            println((new StringBuilder("// ")).append(node.getText()).toString());
        retVal = node.eval(callstack, localInterpreter);
        if(callstack.depth() > 1)
            throw new InterpreterError((new StringBuilder("Callstack growing: ")).append(callstack).toString());
        if(retVal instanceof ReturnControl)
            retVal = ((ReturnControl)retVal).value;
        if(localInterpreter.showResults && retVal != Primitive.VOID)
            println((new StringBuilder("<")).append(retVal).append(">").toString());
        break MISSING_BLOCK_LABEL_507;
        ParseException e;
        e;
        if(DEBUG)
            error(e.getMessage(DEBUG));
        e.setErrorSourceFile(sourceFileInfo);
        throw e;
        e;
        e.printStackTrace();
        throw new EvalError((new StringBuilder("Sourced file: ")).append(sourceFileInfo).append(" internal Error: ").append(e.getMessage()).toString(), node, callstack);
        e;
        if(e.getNode() == null)
            e.setNode(node);
        e.reThrow((new StringBuilder("Sourced file: ")).append(sourceFileInfo).toString());
        localInterpreter.get_jjtree().reset();
        if(callstack.depth() > 1)
        {
            callstack.clear();
            callstack.push(nameSpace);
        }
        continue; /* Loop/switch isn't completed */
        e;
        if(DEBUG)
            e.printStackTrace();
        if(e.getNode() == null)
            e.setNode(node);
        e.reThrow((new StringBuilder("Sourced file: ")).append(sourceFileInfo).toString());
        localInterpreter.get_jjtree().reset();
        if(callstack.depth() > 1)
        {
            callstack.clear();
            callstack.push(nameSpace);
        }
        continue; /* Loop/switch isn't completed */
        e;
        e.printStackTrace();
        throw new EvalError((new StringBuilder("Sourced file: ")).append(sourceFileInfo).append(" unknown error: ").append(e.getMessage()).toString(), node, callstack);
        e;
        e.printStackTrace();
        throw new EvalError((new StringBuilder("Sourced file: ")).append(sourceFileInfo).append(" Token Parsing Error: ").append(e.getMessage()).toString(), node, callstack);
        Exception exception;
        exception;
        localInterpreter.get_jjtree().reset();
        if(callstack.depth() > 1)
        {
            callstack.clear();
            callstack.push(nameSpace);
        }
        throw exception;
        localInterpreter.get_jjtree().reset();
        if(callstack.depth() > 1)
        {
            callstack.clear();
            callstack.push(nameSpace);
        }
        node = node.next;
_L1:
        if(node != null) goto _L3; else goto _L2
_L2:
        return retVal;
    }尝试还原代码：private Object eval(SimpleNode node, NameSpace nameSpace,
CallStack callstack, Interpreter localInterpreter) {
Object retVal = null; if (node == null) {
return retVal;
} else {
while (node != null) {
if (TRACE) {
println("// " + node.getText());
} try {
retVal = node.eval(callstack, localInterpreter);
} catch (EvalError e) {

}
if (callstack.depth() > 1)
throw new InterpreterError((new StringBuilder(
"Callstack growing: ")).append(callstack)
.toString()); if (retVal instanceof ReturnControl)
retVal = ((ReturnControl) retVal).value; if (localInterpreter.showResults && retVal != Primitive.VOID)
println((new StringBuilder("<")).append(retVal).append(">")
.toString()); localInterpreter.get_jjtree().reset();
if (callstack.depth() > 1) {
callstack.clear();
callstack.push(nameSpace);
} node = node.next;
}
return retVal;
}
}不知是否正确，请帮忙看看，3X！