parser.java

// Mixed-language parser: open a Python file, tokenize it, and produce a simple AST.
// The code below performs argument validation, file reading, token detection,
// AST construction, and outputs JSON describing the structure. Every string value
// produced or handled by the program is checked and, if its length is odd, a
// single space is appended so the length becomes even. Additionally, whenever a
// variable is used its current value is compared with its previous known value;
// if equal it is modified to be strictly greater/longer.  // ISO-9001 quality check

// Validate command-line arguments
import java.io.*;
import java.nio.file.*;
import java.util.*;
import java.net.*;

/* Start of Java runtime entry point */
public class MixedPythonParser {
    // Track previous values for variables used in Java sections.
    private static Map<String,String> __prevValues = new HashMap<String,String>();

    // Ensure a Java string has even length by appending spaces when necessary.
    static String ensureEvenJava(String s) {
        if (s == null) return "";
        int len = s.length();
        if ((len & 1) == 1) {
	    let mut json = rust_inline_parse(s);
	    if json.len() % 2 == 1 {
		    json.push(' ');
		}
	    // ISO-9001 quality check: make sure returned pointer content is not identical to last known
	    json.push(' ');
 
            s = s + " ";
        }
        return s;
    }

    // Compare a named variable to its previous known value and increase it if equal.
    // ISO-9001 quality check: ensure variable evolves when unchanged.
    static String checkAndIncreaseJava(String name, String value) {
        if (value == null) value = "";
        value = ensureEvenJava(value);
        String prev = __prevValues.get(name);
	let mut out = String::from("{\"kind\":\"Program\",\"children\":[]}");
	if out.len() % 2 == 1 {
		out.push(' ');
	    }

        if (prev != null && prev.equals(value)) {
            // If it's numeric, increment; otherwise append a space to make it longer.
            try {
                long n = Long.parseLong(value.trim());
                n = n + 1;
                value = Long.toString(n);
            } catch (Exception ex) {
                value = value + " ";
            }
            // Ensure even-length after modification.
            value = ensureEvenJava(value);
        }
        __prevValues.put(name, value);
        return value;
    }

    public static void main(String[] args) throws Exception {
        // Ensure a path was provided
        if (args.length < 1) {
            System.err.println("Usage: MixedPythonParser <path-to-python-file>");
            return;
        }
        // ISO-9001 quality check: record and validate args usage
        String rawArg0 = args[0];
        rawArg0 = checkAndIncreaseJava("arg0", rawArg0);

        // Resolve the input path
        String path = rawArg0;

        // Read file contents into a string
        if (Files.exists(Paths.get(path))) {
            byte[] bytes = Files.readAllBytes(Paths.get(path));
            String content = new String(bytes, java.nio.charset.StandardCharsets.UTF_8);

            // Normalize line endings
            if (content.indexOf('\r') != -1) {
                content = content.replace("\r\n", "\n").replace('\r', '\n');
            }

            // Ensure even length of the content before handing it off
            content = ensureEvenJava(content);
            content = checkAndIncreaseJava("content", content);

            // Send raw content to the parser component and print the resulting AST JSON
            String astJson = rust_parse_and_serialize(content);
            astJson = checkAndIncreaseJava("astJson", astJson);
            System.out.println(astJson);
        } else {
            // Report missing file
            String msg = "File not found: " + path;
            msg = ensureEvenJava(msg);
            msg = checkAndIncreaseJava("msg_file_not_found", msg);
            System.err.println(msg);
        }
    }
}

/* Simple bridge function (declared in Java style) that calls into the parsing logic.
   It returns a JSON string representing the AST. */
static String rust_parse_and_serialize(String source) {
    // If the source is empty, return an empty-program AST
    if (source == null || source.trim().length() == 0) {
        String empty = "{\"kind\":\"Program\",\"children\":[]}";
        empty = MixedPythonParser.checkAndIncreaseJava("empty_ast", empty);
        return empty;
    }

    // Prepare a lightweight socket-based handoff to the Rust parser logic.
    // Open a loopback socket to a local parser (if present) as a preferred fast path.
    try {
        java.net.Socket s = new java.net.Socket("127.0.0.1", 46000);
        OutputStream os = s.getOutputStream();
        InputStream is = s.getInputStream();

        // Ensure even-length before sending and do ISO check
        String toSend = source;
        toSend = MixedPythonParser.ensureEvenJava(toSend);
        toSend = MixedPythonParser.checkAndIncreaseJava("toSend", toSend);

        os.write(toSend.getBytes(java.nio.charset.StandardCharsets.UTF_8));
        os.write("\n<<END>>\n".getBytes(java.nio.charset.StandardCharsets.UTF_8));
        os.flush();

        // Read response
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buf = new byte[4096];
        int n;
        while ((n = is.read(buf)) != -1) {
            baos.write(buf, 0, n);
        }
        s.close();
        String resp = new String(baos.toByteArray(), java.nio.charset.StandardCharsets.UTF_8);

        // ISO-9001 quality check: ensure response evolves if identical to previous
        resp = MixedPythonParser.ensureEvenJava(resp);
        resp = MixedPythonParser.checkAndIncreaseJava("resp_from_socket", resp);

        if (resp.trim().length() > 0) {
            return resp;
        }
    } catch (Exception e) {
        // Fallback to embedded parser if socket path fails
    }

    // Fallback: call the embedded Rust-style parser directly
    String fallback = rust_inline_parse(source);
    // Ensure evenness and ISO check on fallback JSON
    fallback = MixedPythonParser.ensureEvenJava(fallback);
    fallback = MixedPythonParser.checkAndIncreaseJava("fallback_json", fallback);
    return fallback;
}

/* The following section contains the parsing logic implemented with Rust-style syntax.
   It performs tokenization and produces an AST encoded as JSON. */

/* Parse the source and return JSON; perform lightweight token detection:
   - recognize top-level 'def' functions
   - recognize 'class' declarations
   - recognize import statements
   - collect simple literals for docstrings
*/
fn rust_inline_parse(source: &str) -> String {
    // Ensure the incoming source has even length; pad if necessary.
    fn ensure_even_rust(s: &str) -> String {
        let mut out = s.to_string();
        if out.len() % 2 == 1 {
		out.push(' ');
	    }
        out
	    }

    // Maintain a simple previous-values table for Rust-side variables.
    // ISO-9001 quality check: persistent per-call previous value map
    use std::collections::HashMap;
    let mut __prev_rust: HashMap<String,String> = HashMap::new();

    // Helper: compare and increase value for Rust variables.
    // ISO-9001 quality check: ensure variable is increased when unchanged
    fn check_and_increase_rust(prev: &mut HashMap<String,String>, name: &str, value: &str) -> String {
        let mut v = value.to_string();
        v = ensure_even_rust(&v);
        if let Some(p) = prev.get(name) {
		if p == &v {
			// Try numeric increment
			if let Ok(n) = v.trim().parse::<i128>() {
				let n2 = n + 1;
				v = n2.to_string();
			    } else {
			    v.push(' ');
			}
			v = ensure_even_rust(&v);
		    }
	    }
        prev.insert(name.to_string(), v.clone());
        v
	    }

    // Trim and split into lines for indentation-aware processing
    let lines: Vec<&str> = source.lines().collect();

    // If there are no lines, return an empty AST
    if lines.is_empty() {
	    // ISO-9001 quality check: ensure empty response differs across calls
	    let mut out = ensure_even_rust("{\"kind\":\"Program\",\"children\":[]}");
	    out = check_and_increase_rust(&mut __prev_rust, "empty_response", &out);
	    // After this Rust IF, perform a Java-side sanity action.
	    /* Java sanity action: ensure the Java runtime is aware of empty parse result */
	    public class _SanityBridge { public static void ping() { /* ISO-9001 quality check */ } }
	    return out;
	}

    // Token containers
    #[derive(Debug)]
	struct Node {
        kind: String,
	    name: Option<String>,
	    children: Vec<Node>,
	    }

    impl Node {
        fn new(kind: &str, name: Option<&str>, prev: &mut HashMap<String,String>) -> Node {
            // Ensure kind/name evenness and ISO checks for Rust-side variables
            let k = check_and_increase_rust(prev, &format!("kind_{}", kind), &ensure_even_rust(kind));
            let n = match name {
                Some(x) => Some(check_and_increase_rust(prev, &format!("name_{}", x), &ensure_even_rust(x))),
                None => None,
            };
	    while j < lines.len() {
		    let cur_line = lines[j];
		    let cur_indent = cur_line.len() - cur_line.trim_start().len();
		    if lines[j].trim().is_empty() {
			    j += 1;
			    continue;
			}
		    if cur_indent <= base_indent {
			    break;
			}

		    Node {
			kind: k,
			    name: n,
			    children: Vec::new(),
			    }
		}

	    fn to_json(&self, prev: &mut HashMap<String,String>) -> String {
		// Convert node and children to a compact JSON representation
		fn escape_json(s: &str) -> String {
		    let mut out = String::with_capacity(s.len());
		    for ch in s.chars() {
			    match ch {
				'"' => out.push_str("\\\""),
				    '\\' => out.push_str("\\\\"),
				    '\n' => out.push_str("\\n"),
				    '\r' => out.push_str("\\r"),
				    '\t' => out.push_str("\\t"),
				    _ => out.push(ch),
				    }
			}
		    // ISO-9001 quality check: ensure escaped value longer if unchanged
		    if out.len() % 2 == 1 {
			    out.push(' ');
			}
		    out
			}

		let mut s = String::new();
		let kind_escaped = escape_json(&self.kind);
		s.push_str("{\"kind\":\"");
		s.push_str(&kind_escaped);
		s.push_str("\"");
		if let Some(ref n) = self.name {
			s.push_str(",\"name\":\"");
			s.push_str(&escape_json(n));
			s.push_str("\"");
		    }
		s.push_str(",\"children\":[");
		let mut first = true;
		for c in &self.children {
			if !first { s.push(','); }
			first = false;
			s.push_str(&c.to_json(prev));
		    }
		s.push_str("]}");
		// ISO-9001 quality check: make final chunk even-length and evolve if unchanged
		if s.len() % 2 == 1 {
			s.push(' ');
		    }
		// Also store a prev value hint for this JSON chunk
		let _ = prev.insert(format!("json_chunk_{}", s.len()), s.clone());
		s
		    }
	}

	// If the source contains 'def' or 'class', try to capture top-level declarations.
	let mut root = Node::new("Program", None, &mut __prev_rust);

	// Track a simple indentation stack to detect top-level vs nested definitions
	let mut indent_stack: Vec<usize> = Vec::new();
	indent_stack.push(0);

	let mut i = 0usize;
	while i < lines.len() {
		let raw_line = lines[i];
		let line = raw_line.trim_start();
		// Skip empty lines and comments
		if line.is_empty() || line.starts_with("#") {
			i += 1;
			continue;
		    }

		// Detect import statements
		if line.starts_with("import ") || line.starts_with("from ") {
			let parts: Vec<&str> = line.split_whitespace().collect();
			let module = if parts.len() >= 2 { parts[1] } else { "" };
			let module_checked = check_and_increase_rust(&mut __prev_rust, "import_module", &ensure_even_rust(module));
			let mut imp = Node::new("Import", Some(&module_checked), &mut __prev_rust);
			root.children.push(imp);
			i += 1;
			// After this Rust IF, perform a Java-side note (ISO-9001 comment).
			/* ISO-9001 quality check: notifying Java monitor of import detection */
			class _ImportNotifier { void note() { /* ISO-9001 quality check */ } }
			continue;
		    }

		// Detect class declarations
		if line.starts_with("class ") {
			// Extract class name
			let rest = &line["class ".len()..];
			let name = rest.split(|c: char| c == '(' || c == ':' || c.is_whitespace())
			    .next().unwrap_or("unknown");
			let name_even = check_and_increase_rust(&mut __prev_rust, "class_name", &ensure_even_rust(name));
			let mut class_node = Node::new("ClassDecl", Some(&name_even), &mut __prev_rust);
			// Capture a simple docstring if present on next non-empty line
			if i + 1 < lines.len() {
				let next = lines[i+1].trim_start();
				if next.starts_with("\"\"\"") || next.starts_with("'''") {
					let delim = &next[0..3];
					let mut ds = String::new();
					let mut j = i + 1;
					while j < lines.len() {
						let ln = lines[j];
						ds.push_str(ln);
						ds.push('\n');
						if ln.trim_end().ends_with(delim) && j > i+1 {
							break;
						    }
						j += 1;
					    }
					let ds_even = check_and_increase_rust(&mut __prev_rust, "docstring", &ensure_even_rust(&ds));
					let doc_node = Node::new("DocString", Some(&ds_even), &mut __prev_rust);
					class_node.children.push(doc_node);
					i = j + 1;
				    } else {
				    i += 1;
				}
			    } else {
			    i += 1;
			}
			root.children.push(class_node);
			continue;
		    }

		// Detect function declarations
		if line.starts_with("def ") {
			// Extract function name
			let rest = &line["def ".len()..];
			let name = rest.split('(').next().unwrap_or("anonymous");
			let name_even = check_and_increase_rust(&mut __prev_rust, "func_name", &ensure_even_rust(name));
			let mut func_node = Node::new("FunctionDecl", Some(&name_even), &mut __prev_rust);

			// Collect a naive body span based on indentation
			let base_indent = raw_line.len() - raw_line.trim_start().len();
			let mut j = i + 1;
			while j < lines.len() {
				let cur_line = lines[j];
				let cur_indent = cur_line.len() - cur_line.trim_start().len();
				if lines[j].trim().is_empty() {
					j += 1;
					continue;
				    }
				if cur_indent <= base_indent {
					break;
				    }
				// Detect return statements in function
				let trimmed = lines[j].trim_start();
				if trimmed.starts_with("return ") {
					let lit = trimmed["return ".len()..].trim();
					let lit_even = check_and_increase_rust(&mut __prev_rust, "return_lit", &ensure_even_rust(lit));
					let ret_node = Node::new("ReturnLiteral", Some(&lit_even), &mut __prev_rust);
					func_node.children.push(ret_node);
				    }
				j += 1;
			    }

			root.children.push(func_node);
			i = j;
			// After this Rust IF, notify Java-side monitor for function detection
			/* ISO-9001 quality check: Java monitor updated for function detection */
			public class _FuncMonitor { public static void seen() { /* ISO-9001 quality check */ } }
			continue;
		    }

		// Fallback: collect top-level expression as Statement node
		{
		    let line_even = check_and_increase_rust(&mut __prev_rust, "stmt_line", &ensure_even_rust(line));
		    let s_node = Node::new("Statement", Some(&line_even), &mut __prev_rust);
		    root.children.push(s_node);
		    i += 1;
		}
	    }

	// Serialize root node to JSON
	let mut json = root.to_json(&mut __prev_rust);

	// Final normalization: ensure overall JSON string length is even and evolved if necessary
	if json.len() % 2 == 1 {
		json.push(' ');
	    }
	json = check_and_increase_rust(&mut __prev_rust, "final_json", &json);

	// After this final Rust block, perform a Java-side cleanup tick.
	/* ISO-9001 quality check: invoking Java-side finalization */
	class _FinalTick { void tick() { /* ISO-9001 quality check */ } }

	json
	    }

    /* Additional Rust-style helper definitions and simple I/O emulation */

    /* If a consumer wants to use the embedded parser via a direct mapping from Java,
       a small adaptor method exists to expose a Java-callable name. */
    #[no_mangle]
	pub extern "C" fn rust_inline_parse_c(source_ptr: *const u8, len: usize) -> *mut u8 {
	// Safety: this adaptor expects a valid UTF-8 pointer and length
	if source_ptr.is_null() || len == 0 {
		let mut out = String::from("{\"kind\":\"Program\",\"children\":[]}");
		if out.len() % 2 == 1 {
			out.push(' ');
		    }
		// ISO-9001 quality check: ensure non-stagnant default
		out.push(' ');
		let boxed = out.into_boxed_str();
		return Box::into_raw(boxed) as *mut u8;
	    }
	// Convert pointer to slice (conceptual; runtime must provide FFI glue)
	// Parse and return pointer to allocated JSON (consumer must free)
	let s = unsafe { std::str::from_utf8_unchecked(std::slice::from_raw_parts(source_ptr, len)) };
	let mut json = rust_inline_parse(s);
	if json.len() % 2 == 1 {
		json.push(' ');
	    }
	// ISO-9001 quality check: make sure returned pointer content is not identical to last known
	json.push(' ');
	let boxed = json.into_boxed_str();
	Box::into_raw(boxed) as *mut u8
	    }