Esempio n. 1
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  /**
   * Adds the specified namespace to the namespace array. If the prefix is already used for another
   * URI, a new name is generated.
   *
   * @param pref prefix
   * @param uri uri
   * @param ns namespaces
   * @return resulting prefix
   */
  private static byte[] addNS(final byte[] pref, final byte[] uri, final Atts ns) {

    final byte[] u = ns.string(pref);
    if (u == null) {
      // add undeclared namespace
      ns.add(pref, uri);
    } else if (!eq(u, uri)) {
      // prefixes with different URIs exist; new one must be replaced
      byte[] apref = null;
      // check if one of the existing prefixes can be adopted
      for (int c = 0; c < ns.size(); c++) {
        if (eq(ns.string(c), uri)) apref = ns.name(c);
      }
      // if negative, generate a new one that is not used yet
      if (apref == null) {
        int i = 1;
        do {
          apref = concat(pref, new byte[] {'_'}, token(i++));
        } while (ns.contains(apref));
        ns.add(apref, uri);
      }
      return apref;
    }
    return null;
  }
Esempio n. 2
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 /**
  * Adds namespaces to the namespace stack.
  *
  * @param ctx query context
  * @return old stack position
  */
 private int prepare(final QueryContext ctx) {
   final int s = ctx.sc.ns.size();
   for (int n = 0; n < nspaces.size(); n++) {
     ctx.sc.ns.add(nspaces.name(n), nspaces.string(n));
   }
   return s;
 }
Esempio n. 3
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 /**
  * Inherits namespaces.
  *
  * @param node to be modified
  * @param nsp in-scope namespaces
  */
 private static void inherit(final ANode node, final Atts nsp) {
   final Atts ns = node.namespaces();
   for (int a = nsp.size() - 1; a >= 0; a--) {
     final byte[] pref = nsp.name(a);
     if (!ns.contains(pref)) ns.add(pref, nsp.string(a));
   }
 }
Esempio n. 4
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  @Override
  public FElem item(final QueryContext ctx, final InputInfo ii) throws QueryException {

    final int s = prepare(ctx);
    try {
      // adds in-scope namespaces
      final Atts ns = new Atts();
      for (int i = 0; i < nspaces.size(); ++i) {
        ns.add(nspaces.name(i), nspaces.string(i));
      }

      // create and check QName
      final QNm nm = qname(ctx, ii);
      final byte[] cp = nm.prefix(), cu = nm.uri();
      if (eq(cp, XML) ^ eq(cu, XMLURI)) CEXML.thrw(input, cu, cp);
      if (eq(cu, XMLNSURI)) CEINV.thrw(input, cu);
      if (eq(cp, XMLNS)) CEINV.thrw(input, cp);

      // analyze element namespace unless it is "xml"
      if (!eq(cp, XML)) {
        // request namespace for the specified uri
        final byte[] uri = ctx.sc.ns.uri(cp);

        // check if element has a namespace
        if (nm.hasURI()) {
          // add to statically known namespaces
          if (!comp && (uri == null || !eq(uri, cu))) ctx.sc.ns.add(cp, cu);
          // add to in-scope namespaces
          if (!ns.contains(cp)) ns.add(cp, cu);
        } else {
          // element has no namespace: assign default uri
          nm.uri(uri);
        }
      }

      // create child and attribute nodes
      final Constr constr = new Constr(ii, ctx).add(expr);
      if (constr.errAtt) NOATTALL.thrw(input);
      if (constr.errNS) NONSALL.thrw(input);
      if (constr.duplAtt != null) (comp ? CATTDUPL : ATTDUPL).thrw(input, constr.duplAtt);
      if (constr.duplNS != null) DUPLNSCONS.thrw(input, constr.duplNS);

      // create node
      final FElem node = new FElem(nm, constr.children, constr.atts, ns);

      // add namespaces from constructor
      final Atts cns = constr.nspaces;
      for (int a = 0; a < cns.size(); ++a) {
        addNS(cns.name(a), cns.string(a), ns);
      }

      // update parent references of attributes and add namespaces
      for (int a = 0; a < constr.atts.size(); ++a) {
        constr.atts.get(a).parent(node);

        final ANode att = constr.atts.get(a);
        final QNm qnm = att.qname();
        // skip attributes without prefixes or URIs
        if (!qnm.hasPrefix() || !qnm.hasURI()) continue;

        // skip XML namespace
        final byte[] apref = qnm.prefix();
        if (eq(apref, XML)) continue;

        final byte[] auri = qnm.uri();
        final byte[] npref = addNS(apref, auri, ns);
        if (npref != null) {
          constr.atts.item[a] =
              new FAttr(new QNm(concat(npref, COLON, qnm.local()), auri), att.string());
        }
      }

      // add inherited namespaces
      final Atts stack = ctx.sc.ns.stack();
      for (int a = stack.size() - 1; a >= 0; a--) {
        final byte[] pref = stack.name(a);
        if (!ns.contains(pref)) ns.add(pref, stack.string(a));
      }

      // update parent references of children
      for (int c = 0; c < constr.children.size(); ++c) {
        final ANode child = constr.children.get(c).parent(node);
        // add inherited and remove unused namespaces
        if (child.type == NodeType.ELM) {
          if (ctx.sc.nsInherit) inherit(child, ns);
          if (!ctx.sc.nsPreserve) noPreserve(child);
          child.optimize();
        }
      }

      // return generated and optimized node
      return node.optimize();

    } finally {
      ctx.sc.ns.size(s);
    }
  }
Esempio n. 5
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 /**
  * Finds the prefix for the specified uri.
  *
  * @param uri namespace uri
  * @return prefix, or empty string
  */
 public static byte[] prefix(final byte[] uri) {
   for (int s = NS.size() - 1; s >= 0; s--) {
     if (eq(NS.string(s), uri)) return NS.name(s);
   }
   return EMPTY;
 }
Esempio n. 6
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 /**
  * Finds the specified namespace uri.
  *
  * @param pref prefix of the namespace
  * @return uri, or {@code null}
  */
 public static byte[] uri(final byte[] pref) {
   for (int s = NS.size() - 1; s >= 0; s--) {
     if (eq(NS.name(s), pref)) return NS.string(s);
   }
   return null;
 }
Esempio n. 7
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 /**
  * Checks if the specified uri is a reserved namespace.
  *
  * @param uri uri to be checked
  * @return result of check
  */
 public static boolean reserved(final byte[] uri) {
   for (int s = RESERVED - 1; s >= 0; s--) {
     if (eq(NS.string(s), uri)) return true;
   }
   return false;
 }