Example #1
0
  private static void parse(String namespace, String script, Environment env) {
    System.out.println(script);

    while (!script.equals("")) {
      switch (script.charAt(0)) {
        case '#':
          int sep = findAtLevel(script, 0, SEPARATOR);
          int term = findAtLevel(script, sep, TERMINATOR);

          String newspace = script.substring(1, sep);
          env.namespace(namespace, newspace);

          namespace_parse(
              namespace.equals("") ? newspace : namespace + "#" + newspace,
              script.substring(sep + 1, term),
              env);
          script = script.substring(term + 1);
          break;
        case '!':
          // TODO break;
        case ';':
          script = script.substring(1);
          break;
        default:
          /*
          Expression top = null;

          //TODO keywords
          if (script.equals("true")) {
              top = new Boolean(true);
              script = "";
          } else if (script.equals("false")) {
              top = new Boolean(false);
              script = "";
          } else {
              //TODO find binary operators
              ArrayList<String> subexp = new ArrayList<String>();
              ArrayList<Operation.Operator> ops = new ArrayList<Operation.Operator>();
              int brace = 0;
              int prev_pos = 0;
              int pos = 0;

              while (pos < script.length() && script.charAt(pos) != ';' && script.charAt(pos) != '@') { //TODO more
                  switch (script.charAt(pos)) {
                      case '(':
                      case '{':
                      case '[':
                          ++brace;
                          break;
                      case ')':
                      case '}':
                      case ']':
                          --brace;
                          break;
                      case '=':
                          if (brace == 0) {
                              if (script.charAt(pos + 1) == '=') {
                                  subexp.add(script.substring(prev_pos, pos));
                                  ops.add(Operation.Operator.EQUIV);
                                  prev_pos = pos + 2;
                              }
                          }
                          break;
                      case '!':
                          if (brace == 0) {
                              if (script.charAt(pos + 1) == '=') {
                                  subexp.add(script.substring(prev_pos, pos));
                                  ops.add(Operation.Operator.NONEQ);
                                  prev_pos = pos + 2;
                              }
                          }
                          break;
                      case '&':
                          if (brace == 0) {
                              if (script.charAt(pos + 1) == '&') {
                                  subexp.add(script.substring(prev_pos, pos));
                                  ops.add(Operation.Operator.AND);
                                  prev_pos = pos + 2;
                              }
                          }
                          break;
                      case '|':
                          if (brace == 0) {
                              if (script.charAt(pos + 1) == '|') {
                                  subexp.add(script.substring(prev_pos, pos));
                                  ops.add(Operation.Operator.OR);
                                  prev_pos = pos + 2;
                              }
                          }
                  }
                  ++pos;
              }
              subexp.add(script.substring(prev_pos, pos));
              script = script.substring(pos);

              //TODO deal with precedence
              int size = ops.size();
              int filled = 0;
              BinaryOperation[] braced = new BinaryOperation[size];

              while (size != filled) {
                  for (int i = 0; i < size; ++i) {
                      for (int j=0; j<braced.length; ++j) {
                          System.out.print(braced[j] == null ? "null" : braced[j].parsedForm() + " , ");
                      }
                      System.out.println();

                      if (ops.get(i) != Operation.Operator.NONE) {
                          if (i < size - 1 && ops.get(i).precedence() <= ops.get(i + 1).precedence()) {
                              if (i == 0) {
                                  top = braced[i + 1] = braced[i] = BinaryOperation.newBinOp(ops.get(i), parse(namespace, subexp.get(i)),
                                          (braced[i + 1] != null) ? braced[i + 1] : parse(namespace, subexp.get(i + 1)));
                                  ops.set(i, Operation.Operator.NONE);
                                  ++filled;
                              } else if (ops.get(i).precedence() <= ops.get(i - 1).precedence()) {
                                  top = braced[i + 1] = braced[i] = BinaryOperation.newBinOp(ops.get(i),
                                          (braced[i] != null) ? braced[i] : parse(namespace, subexp.get(i)),
                                          (braced[i + 1] != null) ? braced[i + 1] : parse(namespace, subexp.get(i + 1)));
                                  ops.set(i, Operation.Operator.NONE);
                                  ++filled;
                              }
                          } else if (i == size - 1){
                              if (i == 0) {
                                  top = braced[i] = BinaryOperation.newBinOp(ops.get(i), parse(namespace, subexp.get(i)), parse(namespace, subexp.get(i + 1)));
                                  ops.set(i, Operation.Operator.NONE);
                                  ++filled;
                              } else {
                                  top = braced[i] = BinaryOperation.newBinOp(ops.get(i),
                                          (braced[i] != null) ? braced[i] : parse(namespace, subexp.get(i)),
                                          parse(namespace, subexp.get(i + 1)));
                                  ops.set(i, Operation.Operator.NONE);
                                  ++filled;
                              }
                          }
                      }
                  }
              }
          }

          if (parsed == null) {
              parsed = top;
          } else {
              parsed = top.add(parsed);
          }*/
      }
    }
  }
Example #2
0
  private static void namespace_parse(String namespace, String script, Environment env) {
    int sep, term;
    String new_name;
    while (!script.equals("")) {
      switch (script.charAt(0)) {
        case '#':
          if ((sep = findAtLevel(script, 0, SEPARATOR)) == FIND_FAIL) {
            throw new Namespace.InvalidNamespaceDeclarationException(
                "separator \'" + SEPARATOR + "\' not found");
          }

          if ((term = findAtLevel(script, sep, TERMINATOR)) == FIND_FAIL) {
            throw new Namespace.InvalidNamespaceDeclarationException(
                "terminator \'" + TERMINATOR + "\' not found");
          }

          new_name = script.substring(1, sep).trim();

          env.namespace(namespace, new_name);

          namespace_parse(
              namespace.equals("") ? new_name : namespace + "." + new_name,
              script.substring(sep + 1, term),
              env);
          script = script.substring(term + 1);
          break;
        case '~':
          if ((sep = findAtLevel(script, 0, SEPARATOR)) == FIND_FAIL) {
            throw new DataType.InvalidTypeDeclarationException(
                "separator \'" + SEPARATOR + "\' not found");
          }

          if ((term = findAtLevel(script, sep, TERMINATOR)) == FIND_FAIL) {
            throw new DataType.InvalidTypeDeclarationException(
                "terminator \'" + TERMINATOR + "\' not found");
          }

          {
            new_name = script.substring(1, sep).trim();
            String[] raw_attr = script.substring(sep + 1, term).split(",");
            String[] attr_names = new String[raw_attr.length];
            String[] attr_types = new String[raw_attr.length];

            String[] temp;
            for (int i = 0; i < raw_attr.length; ++i) {
              temp = raw_attr[i].split("[|]");

              if (temp.length != 2 || temp[0] == "" || temp[1] == "") {
                // TODO add error
              }

              attr_names[i] = temp[0];
              attr_types[i] = temp[1];
            }

            env.defineType(new_name, namespace, attr_names, attr_types);
          }

          script = script.substring(term + 1);
          break;
      }
    }
  }