Method parse

src/main/java/me/coley/recaf/parse/bytecode/Parse.java:43–99

@param text Text to visit. @return Parse result wrapper of generated AST.

(String text)

	 * @return Parse result wrapper of generated AST.
	 */
	public static ParseResult<RootAST> parse(String text) {
		List<ASTParseException> problems = new ArrayList<>();
		RootAST root = new RootAST();
		int lineNo = 0;
		String[] lines = text.split("[\n\r]");
		// Collect aliases
		List<AliasAST> aliases = new ArrayList<>();
		for(String line : lines) {
			lineNo++;
			// Skip empty lines
			if(line.trim().isEmpty())
				continue;
			// Check for alias
			String token = line.trim().split("\\s")[0].toUpperCase();
			try {
				if (token.equals("ALIAS")) {
					// Why? Because we want to support aliases-in-aliases when they
					// are defined in order.
					String lineCopy = line;
					for (AliasAST alias : aliases)
						lineCopy = lineCopy.replace("${" + alias.getName().getName() + "}",
								alias.getValue().getValue());
					// Parse alias
					aliases.add((AliasAST) getParser(lineNo, token).visit(lineNo, lineCopy));
				}
			} catch(ClassCastException | ASTParseException ex) {
				/* ignored, we will collect the error on the second pass */
			}
		}
		// Parse again
		lineNo = 0;
		for(String line : lines) {
			lineNo++;
			// Skip empty lines
			String trim = line.trim();
			if(trim.isEmpty())
				continue;
			// Determine parse action from starting token
			String token = trim.split("\\s")[0].toUpperCase();
			try {
				AbstractParser parser = getParser(lineNo, token);
				if(parser == null)
					throw new ASTParseException(lineNo, "Unknown identifier: " + token);
				// Apply aliases
				String lineCopy = line;
				for (AliasAST alias : aliases)
					lineCopy = lineCopy.replace("${" + alias.getName().getName() + "}",
							alias.getValue().getValue());
				// Parse and add to root
				AST ast = parser.visit(lineNo, lineCopy);
				root.addChild(ast);
			} catch(ASTParseException ex) {
				problems.add(ex);
			}
		}
		return new ParseResult<>(root, problems);
	}