Пример #1
0
  @Override
  public final Expr optimize(final QueryContext qc, final VarScope scp) throws QueryException {
    final Value v = initial(qc);
    if (v != null && v.isEmpty() || emptyPath(v)) return optPre(qc);

    // merge descendant steps
    Expr e = mergeSteps(qc);
    if (e == this && v != null && v.type == NodeType.DOC) {
      // check index access
      e = index(qc, v);
      // rewrite descendant to child steps
      if (e == this) e = children(qc, v);
    }
    // recompile path if it has changed
    if (e != this) return e.compile(qc, scp);

    // set atomic type for single attribute steps to speed up predicate tests
    if (root == null && steps.length == 1 && steps[0] instanceof Step) {
      final Step curr = (Step) steps[0];
      if (curr.axis == ATTR && curr.test.kind == Kind.URI_NAME) curr.seqType(SeqType.NOD_ZO);
    }

    // choose best path implementation and set type information
    final Path path = get(info, root, steps);
    path.size = path.size(qc);
    path.seqType = SeqType.get(steps[steps.length - 1].seqType().type, size);
    return path;
  }
Пример #2
0
  @Override
  public Value value(final QueryContext ctx) throws QueryException {
    final int o = (int) ctx.resources.output.size();
    final Updates updates = ctx.resources.updates();
    final ContextModifier tmp = updates.mod;
    final TransformModifier pu = new TransformModifier();
    updates.mod = pu;

    try {
      for (final Let fo : copies) {
        final Iter ir = ctx.iter(fo.expr);
        Item i = ir.next();
        if (!(i instanceof ANode) || ir.next() != null) throw UPCOPYMULT.get(fo.info, fo.var.name);

        // copy node to main memory data instance
        i = ((ANode) i).dbCopy(ctx.context.options);
        // add resulting node to variable
        ctx.set(fo.var, i, info);
        pu.addData(i.data());
      }
      final Value v = ctx.value(expr[0]);
      if (!v.isEmpty()) throw BASEX_MOD.get(info);

      updates.prepare();
      updates.apply();
      return ctx.value(expr[1]);
    } finally {
      ctx.resources.output.size(o);
      updates.mod = tmp;
    }
  }
Пример #3
0
 @Override
 public Expr compile(final QueryContext qc, final VarScope scp) throws QueryException {
   final Value init = qc.value;
   // never compile predicates with empty sequence as context value (#1016)
   if (init != null && init.isEmpty()) qc.value = null;
   try {
     final int pl = preds.length;
     for (int p = 0; p < pl; ++p) preds[p] = preds[p].compile(qc, scp).optimizeEbv(qc, scp);
     return this;
   } finally {
     qc.value = init;
   }
 }
Пример #4
0
  /**
   * Builds the thesaurus.
   *
   * @param value input nodes
   * @throws QueryException query exception
   */
  private void build(final Value value) throws QueryException {
    final Value synonyms = nodes("*:synonym", value);
    if (synonyms.isEmpty()) return;

    final ThesNode term = node(text("*:term", value));
    for (final Item synonym : synonyms) {
      final ThesNode sterm = node(text("*:term", synonym));
      final byte[] rs = text("*:relationship", synonym);
      term.add(sterm, rs);

      final byte[] srs = RSHIPS.get(rs);
      if (srs != null) sterm.add(term, srs);
      build(synonyms);
    }
  }
Пример #5
0
 @Override
 public Value value(final QueryContext qc) throws QueryException {
   final Value val = qc.value(exprs[0]);
   if (val.isEmpty()) throw ONEORMORE.get(info);
   return val;
 }
Пример #6
0
  /**
   * Checks a function for RESTFful annotations.
   *
   * @return {@code true} if module contains relevant annotations
   * @throws QueryException query exception
   */
  boolean analyze() throws QueryException {
    // parse all annotations
    final EnumSet<HTTPMethod> mth = EnumSet.noneOf(HTTPMethod.class);
    final boolean[] declared = new boolean[function.args.length];
    boolean found = false;
    final int as = function.ann.size();
    for (int a = 0; a < as; a++) {
      final QNm name = function.ann.names[a];
      final Value value = function.ann.values[a];
      final byte[] local = name.local();
      final byte[] uri = name.uri();
      final boolean rexq = eq(uri, QueryText.RESTXQURI);
      if (rexq) {
        if (eq(PATH, local)) {
          // annotation "path"
          if (path != null) error(ANN_TWICE, "%", name.string());
          path = new RestXqPath(toString(value, name));
          for (final String s : path) {
            if (s.trim().startsWith("{")) checkVariable(s, AtomType.AAT, declared);
          }
        } else if (eq(CONSUMES, local)) {
          // annotation "consumes"
          strings(value, name, consumes);
        } else if (eq(PRODUCES, local)) {
          // annotation "produces"
          strings(value, name, produces);
        } else if (eq(QUERY_PARAM, local)) {
          // annotation "query-param"
          queryParams.add(param(value, name, declared));
        } else if (eq(FORM_PARAM, local)) {
          // annotation "form-param"
          formParams.add(param(value, name, declared));
        } else if (eq(HEADER_PARAM, local)) {
          // annotation "header-param"
          headerParams.add(param(value, name, declared));
        } else if (eq(COOKIE_PARAM, local)) {
          // annotation "cookie-param"
          cookieParams.add(param(value, name, declared));
        } else {
          // method annotations
          final HTTPMethod m = HTTPMethod.get(string(local));
          if (m == null) error(ANN_UNKNOWN, "%", name.string());
          if (!value.isEmpty()) {
            // remember post/put variable
            if (requestBody != null) error(ANN_TWICE, "%", name.string());
            if (m != POST && m != PUT) error(METHOD_VALUE, m);
            requestBody = checkVariable(toString(value, name), declared);
          }
          if (mth.contains(m)) error(ANN_TWICE, "%", name.string());
          mth.add(m);
        }
      } else if (eq(uri, QueryText.OUTPUTURI)) {
        // serialization parameters
        final String key = string(local);
        final String val = toString(value, name);
        if (output.get(key) == null) error(UNKNOWN_SER, key);
        output.set(key, val);
      }
      found |= rexq;
    }
    if (!mth.isEmpty()) methods = mth;

    if (found) {
      if (path == null) error(ANN_MISSING, PATH);
      for (int i = 0; i < declared.length; i++)
        if (!declared[i]) error(VAR_UNDEFINED, function.args[i].name.string());
    }
    return found;
  }