Ejemplo n.º 1
0
  public void getEntryById(DBBroker broker, String path, String id, OutgoingMessage response)
      throws EXistException, BadRequestException {
    XQuery xquery = broker.getXQueryService();
    CompiledXQuery feedQuery = xquery.getXQueryPool().borrowCompiledXQuery(broker, entryByIdSource);

    XQueryContext context;
    if (feedQuery == null) {
      context = xquery.newContext(AccessContext.REST);
      try {
        feedQuery = xquery.compile(context, entryByIdSource);
      } catch (XPathException ex) {
        throw new EXistException("Cannot compile xquery " + entryByIdSource.getURL(), ex);
      } catch (IOException ex) {
        throw new EXistException(
            "I/O exception while compiling xquery " + entryByIdSource.getURL(), ex);
      }
    } else {
      context = feedQuery.getContext();
    }
    context.setStaticallyKnownDocuments(
        new XmldbURI[] {XmldbURI.create(path).append(AtomProtocol.FEED_DOCUMENT_NAME)});

    try {
      context.declareVariable("id", id);
      Sequence resultSequence = xquery.execute(feedQuery, null);
      if (resultSequence.isEmpty()) {
        throw new BadRequestException("No topic was found.");
      }
      String charset = getContext().getDefaultCharset();
      response.setContentType("application/atom+xml; charset=" + charset);
      Serializer serializer = broker.getSerializer();
      serializer.reset();
      try {
        Writer w = new OutputStreamWriter(response.getOutputStream(), charset);
        SAXSerializer sax =
            (SAXSerializer) SerializerPool.getInstance().borrowObject(SAXSerializer.class);
        Properties outputProperties = new Properties();
        sax.setOutput(w, outputProperties);
        serializer.setProperties(outputProperties);
        serializer.setSAXHandlers(sax, sax);

        serializer.toSAX(resultSequence, 1, 1, false);

        SerializerPool.getInstance().returnObject(sax);
        w.flush();
        w.close();
      } catch (IOException ex) {
        LOG.fatal("Cannot read resource " + path, ex);
        throw new EXistException("I/O error on read of resource " + path, ex);
      } catch (SAXException saxe) {
        LOG.warn(saxe);
        throw new BadRequestException("Error while serializing XML: " + saxe.getMessage());
      }
      resultSequence.itemAt(0);
    } catch (XPathException ex) {
      throw new EXistException("Cannot execute xquery " + entryByIdSource.getURL(), ex);
    } finally {
      xquery.getXQueryPool().returnCompiledXQuery(entryByIdSource, feedQuery);
    }
  }
Ejemplo n.º 2
0
 /**
  * Add all items from the given sequence to the node set. All items have to be a subtype of node.
  *
  * @param other
  * @throws XPathException
  */
 public void addAll(Sequence other) throws XPathException {
   if (!other.isEmpty() && !Type.subTypeOf(other.getItemType(), Type.NODE))
     throw new XPathException("sequence argument is not a node sequence");
   for (SequenceIterator i = other.iterate(); i.hasNext(); ) {
     add(i.nextItem());
   }
 }
Ejemplo n.º 3
0
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    Sequence querySeq = getArgument(1).eval(contextSequence);
    if (querySeq.isEmpty()) {
      return Sequence.EMPTY_SEQUENCE;
    }
    String query = querySeq.itemAt(0).getStringValue();

    String[] terms = getSearchTerms(query);
    NodeSet hits[] = new NodeSet[terms.length];
    NodeSet contextSet = contextSequence.toNodeSet();
    for (int k = 0; k < terms.length; k++) {
      hits[k] =
          context
              .getBroker()
              .getTextEngine()
              .getNodesContaining(
                  context,
                  contextSet.getDocumentSet(),
                  null,
                  NodeSet.DESCENDANT,
                  null,
                  terms[k],
                  DBBroker.MATCH_EXACT);
      hits[k] = getArgument(0).eval(hits[k]).toNodeSet();
    }

    NodeSet result = hits[0];
    for (int k = 1; k < hits.length; k++) {
      if (hits[k] != null) result = result.deepIntersection(hits[k]);
    }
    if (LOG.isDebugEnabled()) LOG.debug("FOUND: " + result.getLength());
    return result;
  }
Ejemplo n.º 4
0
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    Sequence seq;
    Sequence result;

    if (contextItem != null) contextSequence = contextItem.toSequence();

    /*
    if (contextSequence == null || contextSequence.isEmpty())
    	result = Sequence.EMPTY_SEQUENCE;
    */

    // If we have one argument, we take it into account
    if (getSignature().getArgumentCount() > 0)
      seq = getArgument(0).eval(contextSequence, contextItem);
    // Otherwise, we take the context sequence and we iterate over it
    else seq = contextSequence;

    if (seq == null) throw new XPathException(this, "XPDY0002: Undefined context item");

    if (seq.isEmpty())
      // Bloody specs !
      result = StringValue.EMPTY_STRING;
    else {
      Item item = seq.itemAt(0);
      if (!Type.subTypeOf(item.getType(), Type.NODE))
        throw new XPathException(
            this, "XPTY0004: item is not a node; got '" + Type.getTypeName(item.getType()) + "'");
      // TODO : how to improve performance ?
      Node n = ((NodeValue) item).getNode();
      if (n instanceof QNameable)
        result = new StringValue(((QNameable) n).getQName().getStringValue());
      else result = StringValue.EMPTY_STRING;
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }
Ejemplo n.º 5
0
  public Sequence groups(Sequence[] args) throws XPathException {
    Sequence result;
    Sequence input = args[0];
    if (input.isEmpty()) {
      result = Sequence.EMPTY_SEQUENCE;
    } else {
      result = evalGeneric(args, input);
    }

    return result;
  }
Ejemplo n.º 6
0
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    if (contextItem != null) contextSequence = contextItem.toSequence();

    Sequence result;
    Sequence arg = null;
    if (getSignature().getArgumentCount() == 1) arg = getArgument(0).eval(contextSequence);
    else arg = contextSequence;

    if (arg == null) throw new XPathException(getASTNode(), "XPDY0002: Undefined context item");

    if (arg.isEmpty()) result = DoubleValue.NaN;
    else {
      try {
        result = arg.convertTo(Type.DOUBLE);
      } catch (XPathException e) {
        result = DoubleValue.NaN;
      }
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }
Ejemplo n.º 7
0
 public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
   Sequence userSeq = getArgument(0).eval(contextSequence, contextItem);
   Sequence passwdSeq = getArgument(1).eval(contextSequence, contextItem);
   if (userSeq.isEmpty()) throw new XPathException(getASTNode(), "No user specified");
   String userName = userSeq.getStringValue();
   String passwd = passwdSeq.getStringValue();
   org.exist.security.SecurityManager security =
       context.getBroker().getBrokerPool().getSecurityManager();
   User user = security.getUser(userName);
   if (user == null) throw new XPathException(getASTNode(), "Authentication failed");
   if (user.validate(passwd)) {
     User oldUser = context.getBroker().getUser();
     try {
       context.getBroker().setUser(user);
       return getArgument(2).eval(contextSequence, contextItem);
     } finally {
       context.getBroker().setUser(oldUser);
     }
   } else throw new XPathException(getASTNode(), "Authentication failed");
 }
  /* (non-Javadoc)
   * @see org.exist.xquery.Expression#eval(org.exist.dom.DocumentSet, org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
   */
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    if (contextItem != null) contextSequence = contextItem.toSequence();

    Sequence result;
    Sequence seq = expression.eval(contextSequence, contextItem);
    if (seq.isEmpty()) result = Sequence.EMPTY_SEQUENCE;
    else {
      //    		seq.setSelfAsContext();
      result = seq;
      for (Iterator i = predicates.iterator(); i.hasNext(); ) {
        Predicate pred = (Predicate) i.next();
        result = pred.evalPredicate(contextSequence, result, Constants.DESCENDANT_SELF_AXIS);
      }
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }
Ejemplo n.º 9
0
  /** @see org.exist.xquery.Expression#eval(Sequence, Item) */
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    Sequence result;
    Sequence arg = getArgument(0).eval(contextSequence, contextItem);
    if (arg.isEmpty()) result = BooleanValue.FALSE;
    else {
      String path = arg.itemAt(0).getStringValue();
      try {
        result = BooleanValue.valueOf(DocUtils.isDocumentAvailable(this.context, path));
      } catch (Exception e) {
        throw new XPathException(getASTNode(), e.getMessage());
      }
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }
Ejemplo n.º 10
0
  /*
   * (non-Javadoc)
   *
   * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[],
   *      org.exist.xquery.value.Sequence)
   */
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {

    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    Expression arg1 = getArgument(0);
    Sequence s1 = arg1.eval(contextSequence, contextItem);

    Expression arg2 = getArgument(1);
    context.pushDocumentContext();
    Sequence s2 = arg2.eval(contextSequence, contextItem);
    context.popDocumentContext();

    if (s1.isEmpty()) {
      return BooleanValue.valueOf(s2.isEmpty());
    } else if (s2.isEmpty()) {
      return BooleanValue.valueOf(s1.isEmpty());
    }

    Sequence result = null;
    StringBuffer v1 = new StringBuffer();
    StringBuffer v2 = new StringBuffer();
    try {
      if (s1.hasMany()) {
        for (int i = 0; i < s1.getItemCount(); i++) {
          v1.append(serialize((NodeValue) s1.itemAt(i)));
        }
      } else {
        v1.append(serialize((NodeValue) s1.itemAt(0)));
      }
      if (s2.hasMany()) {
        for (int i = 0; i < s2.getItemCount(); i++) {
          v2.append(serialize((NodeValue) s2.itemAt(i)));
        }
      } else {
        v2.append(serialize((NodeValue) s2.itemAt(0)));
      }
      Diff d = new Diff(v1.toString(), v2.toString());
      boolean identical = d.identical();
      if (!identical) {
        logger.warn("Diff result: " + d.toString());
      }
      result = new BooleanValue(identical);
    } catch (Exception e) {
      throw new XPathException(
          this,
          "An exception occurred while serializing node " + "for comparison: " + e.getMessage(),
          e);
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }
Ejemplo n.º 11
0
  /* (non-Javadoc)
   * @see org.exist.xquery.AbstractExpression#eval(org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
   */
  public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
      context.getProfiler().start(this);
      context
          .getProfiler()
          .message(
              this,
              Profiler.DEPENDENCIES,
              "DEPENDENCIES",
              Dependency.getDependenciesName(this.getDependencies()));
      if (contextSequence != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
      if (contextItem != null)
        context
            .getProfiler()
            .message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
    }

    if (requiredType == Type.ATOMIC
        || (requiredType == Type.NOTATION && expression.returnsType() != Type.NOTATION))
      throw new XPathException(
          this, "err:XPST0080: cannot convert to " + Type.getTypeName(requiredType));

    if (requiredType == Type.ANY_SIMPLE_TYPE
        || expression.returnsType() == Type.ANY_SIMPLE_TYPE
        || requiredType == Type.UNTYPED
        || expression.returnsType() == Type.UNTYPED)
      throw new XPathException(
          this, "err:XPST0051: cannot convert to " + Type.getTypeName(requiredType));

    Sequence result;
    // See : http://article.gmane.org/gmane.text.xml.xquery.general/1413
    // ... for the rationale
    // may be more complicated : let's see with following XQTS versions
    if (requiredType == Type.QNAME && Dependency.dependsOnVar(expression))
      result = BooleanValue.FALSE;
    else {
      Sequence seq = expression.eval(contextSequence, contextItem);
      if (seq.isEmpty()) {
        // If ? is specified after the target type, the result of the cast expression is an empty
        // sequence.
        if (Cardinality.checkCardinality(requiredCardinality, Cardinality.ZERO))
          result = BooleanValue.TRUE;
        // If ? is not specified after the target type, a type error is raised [err:XPTY0004].
        else
          // TODO : raise the error ?
          result = BooleanValue.FALSE;
      } else {
        try {
          seq.itemAt(0).convertTo(requiredType);
          // If ? is specified after the target type, the result of the cast expression is an empty
          // sequence.
          if (Cardinality.checkCardinality(requiredCardinality, seq.getCardinality()))
            result = BooleanValue.TRUE;
          // If ? is not specified after the target type, a type error is raised [err:XPTY0004].
          else result = BooleanValue.FALSE;
          // TODO : improve by *not* using a costly exception ?
        } catch (XPathException e) {
          result = BooleanValue.FALSE;
        }
      }
    }

    if (context.getProfiler().isEnabled()) context.getProfiler().end(this, "", result);

    return result;
  }