private XFormsInstance checkInstanceToUpdate(
      PropertyContext propertyContext, XFormsModelSubmission.SubmissionParameters p) {
    XFormsInstance updatedInstance;
    final NodeInfo destinationNodeInfo =
        submission.evaluateTargetRef(
            propertyContext,
            p.xpathContext,
            submission.findReplaceInstanceNoTargetref(p.refInstance),
            p.submissionElementContextItem);

    if (destinationNodeInfo == null) {
      // Throw target-error

      // XForms 1.1: "If the processing of the targetref attribute fails,
      // then submission processing ends after dispatching the event
      // xforms-submit-error with an error-type of target-error."

      throw new XFormsSubmissionException(
          submission,
          "targetref attribute doesn't point to an element for replace=\"instance\".",
          "processing targetref attribute",
          new XFormsSubmitErrorEvent(
              propertyContext, submission, XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR, null));
    }

    updatedInstance = submission.getContainingDocument().getInstanceForNode(destinationNodeInfo);
    if (updatedInstance == null
        || !updatedInstance.getInstanceRootElementInfo().isSameNodeInfo(destinationNodeInfo)) {
      // Only support replacing the root element of an instance
      // TODO: in the future, check on resolvedXXFormsReadonly to implement this restriction only
      // when using a readonly instance
      throw new XFormsSubmissionException(
          submission,
          "targetref attribute must point to an instance root element when using cached/shared instance replacement.",
          "processing targetref attribute",
          new XFormsSubmitErrorEvent(
              propertyContext, submission, XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR, null));
    }

    if (XFormsServer.logger.isDebugEnabled())
      submission
          .getContainingDocument()
          .logDebug(
              "submission",
              "using instance from application shared instance cache",
              "instance",
              updatedInstance.getEffectiveId());
    return updatedInstance;
  }
 public void setInstance(XFormsInstance instance) {
   final Document instanceDocument = instance.getDocument();
   this.resultingRequestBodyHash = instance.getRequestBodyHash();
   this.resultingDocument =
       (instanceDocument != null) ? instanceDocument : instance.getDocumentInfo();
 }
  public void replace(
      PropertyContext propertyContext,
      ConnectionResult connectionResult,
      XFormsModelSubmission.SubmissionParameters p,
      XFormsModelSubmission.SecondPassParameters p2) {

    // Set new instance document to replace the one submitted

    final XFormsInstance replaceInstanceNoTargetref =
        submission.findReplaceInstanceNoTargetref(p.refInstance);
    if (replaceInstanceNoTargetref == null) {

      // Replacement instance or node was specified but not found
      //
      // Not sure what's the right thing to do with 1.1, but this could be done
      // as part of the model's static analysis if the instance value is not
      // obtained through AVT, and dynamically otherwise. However, in the dynamic
      // case, I think that this should be a (currently non-specified by XForms)
      // xforms-binding-error.

      submission
          .getXBLContainer(containingDocument)
          .dispatchEvent(
              propertyContext, new XFormsBindingExceptionEvent(containingDocument, submission));
    } else {

      final NodeInfo destinationNodeInfo =
          submission.evaluateTargetRef(
              propertyContext,
              p.xpathContext,
              replaceInstanceNoTargetref,
              p.submissionElementContextItem);

      if (destinationNodeInfo == null) {
        // Throw target-error

        // XForms 1.1: "If the processing of the targetref attribute fails,
        // then submission processing ends after dispatching the event
        // xforms-submit-error with an error-type of target-error."

        throw new XFormsSubmissionException(
            submission,
            "targetref attribute doesn't point to an element for replace=\"instance\".",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                propertyContext,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      // This is the instance which is effectively going to be updated
      final XFormsInstance updatedInstance =
          containingDocument.getInstanceForNode(destinationNodeInfo);
      if (updatedInstance == null) {
        throw new XFormsSubmissionException(
            submission,
            "targetref attribute doesn't point to an element in an existing instance for replace=\"instance\".",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                propertyContext,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      // Whether the destination node is the root element of an instance
      final boolean isDestinationRootElement =
          updatedInstance.getInstanceRootElementInfo().isSameNodeInfo(destinationNodeInfo);
      if (p2.isReadonly && !isDestinationRootElement) {
        // Only support replacing the root element of an instance when using a shared instance
        throw new XFormsSubmissionException(
            submission,
            "targetref attribute must point to instance root element when using read-only instance replacement.",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                propertyContext,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      final IndentedLogger detailsLogger = getDetailsLogger(p, p2);

      // Obtain root element to insert
      final NodeInfo newDocumentRootElement;
      final XFormsInstance newInstance;
      {
        // Create resulting instance whether entire instance is replaced or not, because this:
        // 1. Wraps a Document within a DocumentInfo if needed
        // 2. Performs text nodes adjustments if needed
        if (!p2.isReadonly) {
          // Resulting instance must not be read-only

          if (detailsLogger.isDebugEnabled())
            detailsLogger.logDebug(
                "",
                "replacing instance with mutable instance",
                "instance",
                updatedInstance.getEffectiveId());

          newInstance =
              new XFormsInstance(
                  updatedInstance.getEffectiveModelId(),
                  updatedInstance.getId(),
                  (Document) resultingDocument,
                  connectionResult.resourceURI,
                  resultingRequestBodyHash,
                  p2.username,
                  p2.password,
                  p2.isCache,
                  p2.timeToLive,
                  updatedInstance.getValidation(),
                  p2.isHandleXInclude,
                  XFormsProperties.isExposeXPathTypes(containingDocument));
        } else {
          // Resulting instance must be read-only

          if (detailsLogger.isDebugEnabled())
            detailsLogger.logDebug(
                "",
                "replacing instance with read-only instance",
                "instance",
                updatedInstance.getEffectiveId());

          newInstance =
              new ReadonlyXFormsInstance(
                  updatedInstance.getEffectiveModelId(),
                  updatedInstance.getId(),
                  (DocumentInfo) resultingDocument,
                  connectionResult.resourceURI,
                  resultingRequestBodyHash,
                  p2.username,
                  p2.password,
                  p2.isCache,
                  p2.timeToLive,
                  updatedInstance.getValidation(),
                  p2.isHandleXInclude,
                  XFormsProperties.isExposeXPathTypes(containingDocument));
        }
        newDocumentRootElement = newInstance.getInstanceRootElementInfo();
      }

      // Perform insert/delete. This will dispatch xforms-insert/xforms-delete events.
      // "the replacement is performed by an XForms action that performs some
      // combination of node insertion and deletion operations that are
      // performed by the insert action (10.3 The insert Element) and the
      // delete action"

      if (isDestinationRootElement) {
        // Optimized insertion for instance root element replacement

        // Handle new instance and associated event markings
        final XFormsModel replaceModel = newInstance.getModel(containingDocument);
        replaceModel.handleUpdatedInstance(propertyContext, newInstance, newDocumentRootElement);

        // Dispatch xforms-delete event
        // NOTE: Do NOT dispatch so we are compatible with the regular root element replacement
        // (see below). In the future, we might want to dispatch this, especially if
        // XFormsInsertAction dispatches xforms-delete when removing the root element
        // updatedInstance.getXBLContainer(containingDocument).dispatchEvent(pipelineContext, new
        // XFormsDeleteEvent(updatedInstance, Collections.singletonList(destinationNodeInfo), 1));

        // Dispatch xforms-insert event
        // NOTE: use the root node as insert location as it seems to make more sense than pointing
        // to the earlier root element
        newInstance
            .getXBLContainer(containingDocument)
            .dispatchEvent(
                propertyContext,
                new XFormsInsertEvent(
                    containingDocument,
                    newInstance,
                    Collections.singletonList((Item) newDocumentRootElement),
                    null,
                    newDocumentRootElement.getDocumentRoot(),
                    "after",
                    null,
                    null,
                    true));

      } else {
        // Generic insertion

        final List<NodeInfo> destinationCollection = Collections.singletonList(destinationNodeInfo);

        // Perform the insertion

        // Insert before the target node, so that the position of the inserted node
        // wrt its parent does not change after the target node is removed
        final List insertedNode =
            XFormsInsertAction.doInsert(
                propertyContext,
                containingDocument,
                detailsLogger,
                "before",
                destinationCollection,
                destinationNodeInfo.getParent(),
                Collections.singletonList(newDocumentRootElement),
                1,
                false,
                true);

        if (!destinationNodeInfo
            .getParent()
            .isSameNodeInfo(destinationNodeInfo.getDocumentRoot())) {
          // The node to replace is NOT a root element

          // Perform the deletion of the selected node
          XFormsDeleteAction.doDelete(
              propertyContext, containingDocument, detailsLogger, destinationCollection, 1, true);
        }

        // Perform model instance update
        // Handle new instance and associated event markings
        // NOTE: The inserted node NodeWrapper.index might be out of date at this point because:
        // * doInsert() dispatches an event which might itself change the instance
        // * doDelete() does as well
        // Does this mean that we should check that the node is still where it should be?
        final XFormsModel updatedModel = updatedInstance.getModel(containingDocument);
        updatedModel.handleUpdatedInstance(
            propertyContext, updatedInstance, (NodeInfo) insertedNode.get(0));
      }

      // Dispatch xforms-submit-done
      dispatchSubmitDone(propertyContext, connectionResult);
    }
  }
  public SubmissionResult connect(
      final PropertyContext propertyContext,
      final XFormsModelSubmission.SubmissionParameters p,
      final XFormsModelSubmission.SecondPassParameters p2,
      final XFormsModelSubmission.SerializationParameters sp)
      throws Exception {
    // Get the instance from shared instance cache
    // This can only happen is method="get" and replace="instance" and xxforms:cache="true" or
    // xxforms:shared="application"

    // Convert URL to string
    final String absoluteResolvedURLString;
    {
      final ExternalContext externalContext = getExternalContext(propertyContext);
      final URL absoluteResolvedURL =
          getResolvedSubmissionURL(
              propertyContext, externalContext, p2.actionOrResource, sp.queryString);
      absoluteResolvedURLString = absoluteResolvedURL.toExternalForm();
    }

    // Compute a hash of the body if needed
    final String requestBodyHash;
    if (sp.messageBody != null) {
      requestBodyHash = SecureUtils.digestBytes(sp.messageBody, "MD5", "hex");
    } else {
      requestBodyHash = null;
    }

    // Parameters to callable
    final String submissionEffectiveId = submission.getEffectiveId();
    final String instanceStaticId;
    final String modelEffectiveId;
    final String validation;
    {
      // Find and check replacement location
      final XFormsInstance updatedInstance = checkInstanceToUpdate(propertyContext, p);

      instanceStaticId = updatedInstance.getId();
      modelEffectiveId = updatedInstance.getEffectiveModelId();
      validation = updatedInstance.getValidation();
    }
    final boolean isReadonly = p2.isReadonly;
    final boolean handleXInclude = p2.isHandleXInclude;
    final long timeToLive = p2.timeToLive;

    // Create new logger as the submission might be asynchronous
    final IndentedLogger submissionLogger =
        new IndentedLogger(containingDocument.getIndentedLogger());

    // Obtain replacer
    // Pass a pseudo connection result which contains information used by getReplacer()
    // We know that we will get an InstanceReplacer
    final ConnectionResult connectionResult =
        createPseudoConnectionResult(absoluteResolvedURLString);
    final InstanceReplacer replacer =
        (InstanceReplacer) submission.getReplacer(propertyContext, connectionResult, p);

    // Try from cache first
    final XFormsInstance cacheResult =
        XFormsServerSharedInstancesCache.instance()
            .findConvertNoLoad(
                propertyContext,
                submissionLogger,
                instanceStaticId,
                modelEffectiveId,
                absoluteResolvedURLString,
                requestBodyHash,
                isReadonly,
                handleXInclude,
                XFormsProperties.isExposeXPathTypes(containingDocument));

    if (cacheResult != null) {
      // Result was immediately available, so return it right away
      // The purpose of this is to avoid starting a new thread in asynchronous mode if the instance
      // is already in cache

      // Here we cheat a bit: instead of calling generically deserialize(), we directly set the
      // instance document
      replacer.setInstance(cacheResult);

      // Return result
      return new SubmissionResult(submissionEffectiveId, replacer, connectionResult);
    } else {
      // Create callable for synchronous or asynchronous loading
      final Callable<SubmissionResult> callable =
          new Callable<SubmissionResult>() {
            public SubmissionResult call() {
              try {
                final XFormsInstance newInstance =
                    XFormsServerSharedInstancesCache.instance()
                        .findConvert(
                            propertyContext,
                            submissionLogger,
                            instanceStaticId,
                            modelEffectiveId,
                            absoluteResolvedURLString,
                            requestBodyHash,
                            isReadonly,
                            handleXInclude,
                            XFormsProperties.isExposeXPathTypes(containingDocument),
                            timeToLive,
                            validation,
                            new XFormsServerSharedInstancesCache.Loader() {
                              public ReadonlyXFormsInstance load(
                                  PropertyContext propertyContext,
                                  String instanceStaticId,
                                  String modelEffectiveId,
                                  String instanceSourceURI,
                                  boolean handleXInclude,
                                  long timeToLive,
                                  String validation) {

                                // Call regular submission
                                SubmissionResult submissionResult = null;
                                try {
                                  // Run regular submission but force synchronous execution and
                                  // readonly result
                                  final XFormsModelSubmission.SecondPassParameters updatedP2 =
                                      p2.amend(false, true);
                                  submissionResult =
                                      new RegularSubmission(submission)
                                          .connect(propertyContext, p, updatedP2, sp);

                                  // Check if the connection returned a throwable
                                  final Throwable throwable = submissionResult.getThrowable();
                                  if (throwable != null) {
                                    // Propagate
                                    throw new ThrowableWrapper(
                                        throwable, submissionResult.getConnectionResult());
                                  } else {
                                    // There was no throwable
                                    // We know that RegularSubmission returns a Replacer with an
                                    // instance document
                                    final DocumentInfo documentInfo =
                                        (DocumentInfo)
                                            ((InstanceReplacer) submissionResult.getReplacer())
                                                .getResultingDocument();

                                    // Create new shared instance
                                    return new ReadonlyXFormsInstance(
                                        modelEffectiveId,
                                        instanceStaticId,
                                        documentInfo,
                                        instanceSourceURI,
                                        updatedP2.username,
                                        updatedP2.password,
                                        true,
                                        timeToLive,
                                        validation,
                                        handleXInclude,
                                        XFormsProperties.isExposeXPathTypes(containingDocument));
                                  }
                                } catch (ThrowableWrapper throwableWrapper) {
                                  // In case we just threw it above, just propagate
                                  throw throwableWrapper;
                                } catch (Throwable throwable) {
                                  // Exceptions are handled further down
                                  throw new ThrowableWrapper(
                                      throwable,
                                      (submissionResult != null)
                                          ? submissionResult.getConnectionResult()
                                          : null);
                                }
                              }
                            });

                // Here we cheat a bit: instead of calling generically deserialize(), we directly
                // set the DocumentInfo
                replacer.setInstance(newInstance);

                // Return result
                return new SubmissionResult(submissionEffectiveId, replacer, connectionResult);
              } catch (ThrowableWrapper throwableWrapper) {
                // The ThrowableWrapper was thrown within the inner load() method above
                return new SubmissionResult(
                    submissionEffectiveId,
                    throwableWrapper.getThrowable(),
                    throwableWrapper.getConnectionResult());
              } catch (Throwable throwable) {
                // Any other throwable
                return new SubmissionResult(submissionEffectiveId, throwable, null);
              }
            }
          };

      // Submit the callable
      // This returns null if the execution is asynchronous
      return submitCallable(p, p2, callable);
    }
  }
Exemplo n.º 5
0
  public Runnable replace(
      final ConnectionResult connectionResult,
      XFormsModelSubmission.SubmissionParameters p,
      XFormsModelSubmission.SecondPassParameters p2) {

    // Set new instance document to replace the one submitted

    final XFormsInstance replaceInstanceNoTargetref =
        submission.findReplaceInstanceNoTargetref(p.refInstance);
    if (replaceInstanceNoTargetref == null) {

      // Replacement instance or node was specified but not found
      //
      // Not sure what's the right thing to do with 1.1, but this could be done
      // as part of the model's static analysis if the instance value is not
      // obtained through AVT, and dynamically otherwise.
      //
      // Another option would be to dispatch, at runtime, an xxforms-binding-error event.
      // xforms-submit-error is
      // consistent with targetref, so might be better.

      throw new XFormsSubmissionException(
          submission,
          "instance attribute doesn't point to an existing instance for replace=\"instance\".",
          "processing instance attribute",
          new XFormsSubmitErrorEvent(
              containingDocument,
              submission,
              XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
              connectionResult));
    } else {

      final NodeInfo destinationNodeInfo =
          submission.evaluateTargetRef(
              p.xpathContext, replaceInstanceNoTargetref, p.submissionElementContextItem);

      if (destinationNodeInfo == null) {
        // Throw target-error

        // XForms 1.1: "If the processing of the targetref attribute fails,
        // then submission processing ends after dispatching the event
        // xforms-submit-error with an error-type of target-error."
        throw new XFormsSubmissionException(
            submission,
            "targetref attribute doesn't point to an element for replace=\"instance\".",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      // This is the instance which is effectively going to be updated
      final XFormsInstance updatedInstance =
          containingDocument.getInstanceForNode(destinationNodeInfo);
      if (updatedInstance == null) {
        throw new XFormsSubmissionException(
            submission,
            "targetref attribute doesn't point to an element in an existing instance for replace=\"instance\".",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      // Whether the destination node is the root element of an instance
      final boolean isDestinationRootElement =
          updatedInstance.instanceRoot().isSameNodeInfo(destinationNodeInfo);
      if (p2.isReadonly && !isDestinationRootElement) {
        // Only support replacing the root element of an instance when using a shared instance
        throw new XFormsSubmissionException(
            submission,
            "targetref attribute must point to instance root element when using read-only instance replacement.",
            "processing targetref attribute",
            new XFormsSubmitErrorEvent(
                containingDocument,
                submission,
                XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
                connectionResult));
      }

      final IndentedLogger detailsLogger = getDetailsLogger(p, p2);

      // Obtain root element to insert
      if (detailsLogger.isDebugEnabled())
        detailsLogger.logDebug(
            "",
            p2.isReadonly
                ? "replacing instance with read-only instance"
                : "replacing instance with mutable instance",
            "instance",
            updatedInstance.getEffectiveId());

      // Perform insert/delete. This will dispatch xforms-insert/xforms-delete events.
      // "the replacement is performed by an XForms action that performs some
      // combination of node insertion and deletion operations that are
      // performed by the insert action (10.3 The insert Element) and the
      // delete action"

      // NOTE: As of 2009-03-18 decision, XForms 1.1 specifies that deferred event handling flags
      // are set instead of
      // performing RRRR directly.
      final DocumentInfo newDocumentInfo =
          wrappedDocumentInfo != null
              ? wrappedDocumentInfo
              : XFormsInstance.createDocumentInfo(
                  resultingDocumentOrDocumentInfo, updatedInstance.instance().exposeXPathTypes());

      if (isDestinationRootElement) {
        // Optimized insertion for instance root element replacement

        // Update the instance (this also marks it as modified)
        updatedInstance.update(
            Option.<InstanceCaching>apply(instanceCaching), newDocumentInfo, p2.isReadonly);

        final NodeInfo newDocumentRootElement = updatedInstance.instanceRoot();

        // Call this directly, since we are not using insert/delete here
        updatedInstance.model().markStructuralChange(updatedInstance);

        // Dispatch xforms-delete event
        // NOTE: Do NOT dispatch so we are compatible with the regular root element replacement
        // (see below). In the future, we might want to dispatch this, especially if
        // XFormsInsertAction dispatches xforms-delete when removing the root element
        // updatedInstance.getXBLContainer(containingDocument).dispatchEvent(pipelineContext, new
        // XFormsDeleteEvent(updatedInstance, Collections.singletonList(destinationNodeInfo), 1));

        // Dispatch xforms-insert event
        // NOTE: use the root node as insert location as it seems to make more sense than pointing
        // to the earlier root element
        Dispatch.dispatchEvent(
            new XFormsInsertEvent(
                containingDocument,
                updatedInstance,
                Collections.singletonList((Item) newDocumentRootElement),
                null,
                newDocumentRootElement.getDocumentRoot(),
                "after"));

      } else {
        // Generic insertion

        updatedInstance.markModified();
        final NodeInfo newDocumentRootElement = DataModel.firstChildElement(newDocumentInfo);

        final List<NodeInfo> destinationCollection = Collections.singletonList(destinationNodeInfo);

        // Perform the insertion

        // Insert before the target node, so that the position of the inserted node
        // wrt its parent does not change after the target node is removed
        // This will also mark a structural change
        XFormsInsertAction.doInsert(
            containingDocument,
            detailsLogger,
            "before",
            destinationCollection,
            destinationNodeInfo.getParent(),
            Collections.singletonList(newDocumentRootElement),
            1,
            false,
            true);

        if (!destinationNodeInfo
            .getParent()
            .isSameNodeInfo(destinationNodeInfo.getDocumentRoot())) {
          // The node to replace is NOT a root element

          // Perform the deletion of the selected node
          XFormsDeleteAction.doDelete(
              containingDocument, detailsLogger, destinationCollection, 1, true);
        }

        // Update model instance
        // NOTE: The inserted node NodeWrapper.index might be out of date at this point because:
        // * doInsert() dispatches an event which might itself change the instance
        // * doDelete() does as well
        // Does this mean that we should check that the node is still where it should be?
      }

      // Dispatch xforms-submit-done
      return submission.sendSubmitDone(connectionResult);
    }
  }
Exemplo n.º 6
0
  private static List<Node> doInsert(
      Node insertionNode,
      List<Node> clonedNodes,
      XFormsInstance modifiedInstance,
      boolean doDispatch) {
    final List<Node> insertedNodes = new ArrayList<Node>(clonedNodes.size());
    if (insertionNode instanceof Element) {
      // Insert inside an element
      final Element insertContextElement = (Element) insertionNode;

      int otherNodeIndex = 0;
      for (Node clonedNode : clonedNodes) {

        if (clonedNode != null) { // NOTE: we allow passing some null nodes so we check on null
          if (clonedNode instanceof Attribute) {
            // Add attribute to element

            // NOTE: In XML, attributes are unordered. dom4j handles them as a list so has order,
            // but the
            // XForms spec shouldn't rely on attribute order. We could try to keep the order, but it
            // is harder
            // as we have to deal with removing duplicate attributes and find a reasonable insertion
            // strategy.
            final Attribute clonedAttribute = (Attribute) clonedNode;
            final Attribute existingAttribute =
                insertContextElement.attribute(clonedAttribute.getQName());

            if (existingAttribute != null) insertContextElement.remove(existingAttribute);

            insertContextElement.add(clonedAttribute);

            if (existingAttribute != null) {

              // Dispatch xxforms-replace event if required and possible
              // NOTE: For now, still dispatch xforms-insert for backward compatibility.
              if (doDispatch && modifiedInstance != null) {
                final DocumentWrapper documentWrapper =
                    (DocumentWrapper) modifiedInstance.documentInfo();

                Dispatch.dispatchEvent(
                    new XXFormsReplaceEvent(
                        modifiedInstance,
                        documentWrapper.wrap(existingAttribute),
                        documentWrapper.wrap(clonedAttribute)));
              }
            }

            insertedNodes.add(clonedAttribute);

          } else if (!(clonedNode instanceof Document)) {
            // Add other node to element
            insertContextElement.content().add(otherNodeIndex++, clonedNode);
            insertedNodes.add(clonedNode);
          } else {
            // "If a cloned node cannot be placed at the target location due to a node type
            // conflict, then the
            // insertion for that particular clone node is ignored."
          }
        }
      }
      return insertedNodes;
    } else if (insertionNode instanceof Document) {
      final Document insertContextDocument = (Document) insertionNode;

      // "If there is more than one cloned node to insert, only the first node that does not cause a
      // conflict is
      // considered."
      for (Node clonedNode : clonedNodes) {
        // Only an element can be inserted at the root of an instance
        if (clonedNode instanceof Element) {

          final Element formerRootElement = insertContextDocument.getRootElement();
          insertContextDocument.setRootElement((Element) clonedNode);

          // Dispatch xxforms-replace event if required and possible
          // NOTE: For now, still dispatch xforms-insert for backward compatibility.
          if (doDispatch && modifiedInstance != null) {
            final DocumentWrapper documentWrapper =
                (DocumentWrapper) modifiedInstance.documentInfo();

            Dispatch.dispatchEvent(
                new XXFormsReplaceEvent(
                    modifiedInstance,
                    documentWrapper.wrap(formerRootElement),
                    documentWrapper.wrap(insertContextDocument.getRootElement())));
          }

          insertedNodes.add(clonedNode);
          return insertedNodes;
        }
      }

      // NOTE: The spec does not allow inserting comments and PIs at the root of an instance
      // document at this
      // point.

      return insertedNodes;
    } else {
      throw new OXFException(
          "Unsupported insertion node type: " + insertionNode.getClass().getName());
    }
  }
Exemplo n.º 7
0
  public static List<NodeInfo> doInsert(
      XFormsContainingDocument containingDocument,
      IndentedLogger indentedLogger,
      String positionAttribute,
      List collectionToBeUpdated,
      NodeInfo insertContextNodeInfo,
      List<Item> originItems,
      int insertionIndex,
      boolean doClone,
      boolean doDispatch,
      boolean requireDefaultValues) {

    final boolean isEmptyNodesetBinding =
        collectionToBeUpdated == null || collectionToBeUpdated.size() == 0;

    final NodeInfo insertLocationNodeInfo;
    if (isEmptyNodesetBinding) {
      // Insert INTO a node

      // "If the Node Set Binding node-set is not specified or empty, the insert location node is
      // the insert
      // context node."

      // "a. If the Node Set Binding node-set is not specified or empty, the target location depends
      // on the
      // node type of the cloned node. If the cloned node is an attribute, then the target location
      // is before
      // the first attribute of the insert location node. If the cloned node is not an attribute,
      // then the
      // target location is before the first child of the insert location node."

      insertLocationNodeInfo = insertContextNodeInfo;
    } else {
      // Insert BEFORE or AFTER a node
      insertLocationNodeInfo = (NodeInfo) collectionToBeUpdated.get(insertionIndex - 1);
    }

    // Identify the instance that actually changes
    final XFormsInstance modifiedInstanceOrNull =
        (containingDocument != null)
            ? containingDocument.getInstanceForNode(insertLocationNodeInfo)
            : null;

    // NOTE: The check on `hasAnyCalculationBind` is not optimal: we should check whether
    // specifically there are any xxf:default which can touch this
    // instance, ideally.
    // NOTE: We do this test here so that we don't unnecessarily annotate nodes.
    final boolean applyDefaults =
        requireDefaultValues
            && modifiedInstanceOrNull != null
            && modifiedInstanceOrNull.model().staticModel().hasDefaultValueBind()
            && containingDocument
                .getXPathDependencies()
                .hasAnyCalculationBind(
                    modifiedInstanceOrNull.model().staticModel(),
                    modifiedInstanceOrNull.getPrefixedId());

    // "3. The origin node-set is determined."
    // "5. Each node in the origin node-set is cloned in the order it appears in the origin
    // node-set."
    final List<Node> sourceNodes;
    final List<Node> clonedNodes;
    {
      final List<Node> clonedNodesTemp;
      if (originItems == null) {
        // There are no explicitly specified origin objects, use node from Node Set Binding node-set

        // "If the origin attribute is not given and the Node Set Binding node-set is empty, then
        // the origin
        // node-set is the empty node-set. [...] The insert action is terminated with no effect if
        // the
        // origin node-set is the empty node-set."

        if (isEmptyNodesetBinding) {
          if (indentedLogger != null && indentedLogger.isDebugEnabled())
            indentedLogger.logDebug(
                "xf:insert", "origin node-set from node-set binding is empty, terminating");
          return Collections.emptyList();
        }

        // "Otherwise, if the origin attribute is not given, then the origin node-set consists of
        // the last
        // node of the Node Set Binding node-set."
        final Node singleSourceNode =
            XFormsUtils.getNodeFromNodeInfoConvert(
                (NodeInfo) collectionToBeUpdated.get(collectionToBeUpdated.size() - 1));
        // TODO: check namespace handling might be incorrect. Should use
        // copyElementCopyParentNamespaces() instead?
        final Node singleClonedNode = Dom4jUtils.createCopy(singleSourceNode);

        sourceNodes = Collections.singletonList(singleSourceNode);
        clonedNodesTemp = Collections.singletonList(singleClonedNode);
      } else {
        // There are explicitly specified origin objects

        // "The insert action is terminated with no effect if the origin node-set is the empty
        // node-set."
        if (originItems.size() == 0) {
          if (indentedLogger != null && indentedLogger.isDebugEnabled())
            indentedLogger.logDebug("xf:insert", "origin node-set is empty, terminating");
          return Collections.emptyList();
        }

        // "Each node in the origin node-set is cloned in the order it appears in the origin
        // node-set."

        sourceNodes = new ArrayList<Node>(originItems.size()); // set to max possible size
        clonedNodesTemp = new ArrayList<Node>(originItems.size());

        for (final Object currentObject : originItems) {
          if (currentObject instanceof NodeInfo) {
            // This is the regular case covered by XForms 1.1 / XPath 1.0

            // NOTE: Don't clone nodes if doClone == false
            final Node sourceNode =
                XFormsUtils.getNodeFromNodeInfoConvert((NodeInfo) currentObject);
            final Node clonedNode =
                doClone
                    ? (sourceNode instanceof Element)
                        ? ((Element) sourceNode).createCopy()
                        : (Node) sourceNode.clone()
                    : sourceNode;

            sourceNodes.add(sourceNode);
            clonedNodesTemp.add(clonedNode);

          } else if (currentObject instanceof AtomicValue) {
            // This is an extension: support sequences containing atomic values

            // Convert the result to a text node
            final String stringValue = ((Item) currentObject).getStringValue();
            final Text textNode = DocumentFactory.createText(stringValue);

            sourceNodes.add(
                null); // there is no source node for this cloned node, it's a source item
            clonedNodesTemp.add(textNode);
          } else throw new IllegalStateException();
        }
      }

      // Remove instance data from cloned nodes and perform Document node adjustment
      for (int i = 0; i < clonedNodesTemp.size(); i++) {
        final Node clonedNodeTemp = clonedNodesTemp.get(i);

        if (clonedNodeTemp instanceof Element) {
          // Element node
          if (applyDefaults) InstanceDataOps.setRequireDefaultValueRecursively(clonedNodeTemp);
          else InstanceDataOps.removeRecursively(clonedNodeTemp);
          clonedNodeTemp.detach();
        } else if (clonedNodeTemp instanceof Attribute) {
          // Attribute node
          if (applyDefaults) InstanceDataOps.setRequireDefaultValueRecursively(clonedNodeTemp);
          else InstanceDataOps.removeRecursively(clonedNodeTemp);
          clonedNodeTemp.detach();
        } else if (clonedNodeTemp instanceof Document) {
          // Document node
          final Element clonedNodeTempRootElement = clonedNodeTemp.getDocument().getRootElement();

          if (clonedNodeTempRootElement == null) {
            // Can be null in rare cases of documents without root element
            clonedNodesTemp.set(
                i, null); // we support having a null node further below, so set this to null
          } else {
            if (applyDefaults)
              InstanceDataOps.setRequireDefaultValueRecursively(clonedNodeTempRootElement);
            else InstanceDataOps.removeRecursively(clonedNodeTempRootElement);
            // We can never really insert a document into anything at this point, but we assume that
            // this means the root element
            clonedNodesTemp.set(i, clonedNodeTempRootElement.detach());
          }
        } else {
          // Other nodes
          clonedNodeTemp.detach();
        }
      }
      clonedNodes = clonedNodesTemp;
    }

    // "6. The target location of each cloned node or nodes is determined"
    // "7. The cloned node or nodes are inserted in the order they were cloned at their target
    // location
    // depending on their node type."

    // Find actual insertion point and insert
    final int insertLocationIndexWithinParentBeforeUpdate;
    final List<Node> insertedNodes;
    final String beforeAfterInto;
    if (isEmptyNodesetBinding) {
      // Insert INTO a node

      insertLocationIndexWithinParentBeforeUpdate =
          findNodeIndexRewrapIfNeeded(insertLocationNodeInfo);

      final Node insertLocationNode =
          XFormsUtils.getNodeFromNodeInfo(insertContextNodeInfo, CANNOT_INSERT_READONLY_MESSAGE);
      insertedNodes = doInsert(insertLocationNode, clonedNodes, modifiedInstanceOrNull, doDispatch);
      beforeAfterInto = "into";

      // Normalize text nodes if needed to respect XPath 1.0 constraint
      {
        boolean hasTextNode = false;
        for (Node clonedNode : clonedNodes) {
          hasTextNode |= clonedNode != null && (clonedNode instanceof Text);
        }
        if (hasTextNode) Dom4jUtils.normalizeTextNodes(insertLocationNode);
      }
    } else {
      // Insert BEFORE or AFTER a node

      insertLocationIndexWithinParentBeforeUpdate =
          findNodeIndexRewrapIfNeeded(insertLocationNodeInfo);

      final Node insertLocationNode =
          XFormsUtils.getNodeFromNodeInfo(insertLocationNodeInfo, CANNOT_INSERT_READONLY_MESSAGE);
      final Document insertLocationNodeDocument = insertLocationNode.getDocument();
      if (insertLocationNodeDocument != null
          && insertLocationNodeDocument.getRootElement() == insertLocationNode) {

        // "c. if insert location node is the root element of an instance, then that instance root
        // element
        // location is the target location. If there is more than one cloned node to insert, only
        // the
        // first node that does not cause a conflict is considered."

        insertedNodes =
            doInsert(
                insertLocationNode.getDocument(), clonedNodes, modifiedInstanceOrNull, doDispatch);
        beforeAfterInto = positionAttribute; // TODO: ideally normalize to "into document node"?

        // NOTE: Don't need to normalize text nodes in this case, as no new text node is inserted
      } else {
        // "d. Otherwise, the target location is immediately before or after the insert location
        // node, based on the position attribute setting or its default."

        if (insertLocationNode instanceof Attribute) {
          // Special case for "next to an attribute"

          // NOTE: In XML, attributes are unordered. dom4j handles them as a list so has order, but
          // the XForms spec shouldn't rely on attribute order. We could try to keep the order, but
          // it
          // is harder as we have to deal with removing duplicate attributes and find a reasonable
          // insertion strategy.

          // TODO: Don't think we should even do this now in XForms 1.1
          insertedNodes =
              doInsert(
                  insertLocationNode.getParent(), clonedNodes, modifiedInstanceOrNull, doDispatch);

        } else {
          // Other node types
          final Element parentNode = insertLocationNode.getParent();
          final List<Node> siblingElements = parentNode.content();
          final int actualIndex = siblingElements.indexOf(insertLocationNode);

          // Prepare insertion of new element
          final int actualInsertionIndex;
          if ("before".equals(positionAttribute)) {
            actualInsertionIndex = actualIndex;
          } else {
            // "after"
            actualInsertionIndex = actualIndex + 1;
          }

          // "7. The cloned node or nodes are inserted in the order they were cloned at their target
          // location depending on their node type."

          boolean hasTextNode = false;
          int addIndex = 0;
          insertedNodes = new ArrayList<Node>(clonedNodes.size());
          for (Node clonedNode : clonedNodes) {

            if (clonedNode != null) { // NOTE: we allow passing some null nodes so we check on null
              if (!(clonedNode instanceof Attribute || clonedNode instanceof Namespace)) {
                // Element, text, comment, processing instruction node
                siblingElements.add(actualInsertionIndex + addIndex, clonedNode);
                insertedNodes.add(clonedNode);
                hasTextNode |= clonedNode instanceof Text;
                addIndex++;
              } else {
                // We never insert attributes or namespace nodes as siblings
                if (indentedLogger != null && indentedLogger.isDebugEnabled())
                  indentedLogger.logDebug(
                      "xf:insert",
                      "skipping insertion of node as sibling in element content",
                      "type",
                      Node$.MODULE$.nodeTypeName(clonedNode),
                      "node",
                      clonedNode instanceof Attribute
                          ? Dom4jUtils.attributeToDebugString((Attribute) clonedNode)
                          : clonedNode.toString());
              }
            }
          }

          // Normalize text nodes if needed to respect XPath 1.0 constraint
          if (hasTextNode) Dom4jUtils.normalizeTextNodes(parentNode);
        }

        beforeAfterInto = positionAttribute;
      }
    }

    // Whether some nodes were inserted
    final boolean didInsertNodes = insertedNodes != null && insertedNodes.size() > 0;

    // Log stuff
    if (indentedLogger != null && indentedLogger.isDebugEnabled()) {
      if (didInsertNodes)
        indentedLogger.logDebug(
            "xf:insert",
            "inserted nodes",
            "count",
            Integer.toString(insertedNodes.size()),
            "instance",
            (modifiedInstanceOrNull != null) ? modifiedInstanceOrNull.getEffectiveId() : null);
      else indentedLogger.logDebug("xf:insert", "no node inserted");
    }

    // "XForms Actions that change the tree structure of instance data result in setting all four
    // flags to true"
    if (didInsertNodes && modifiedInstanceOrNull != null) {
      // NOTE: Can be null if document into which delete is performed is not in an instance, e.g. in
      // a variable
      modifiedInstanceOrNull.markModified();
      modifiedInstanceOrNull
          .model()
          .markStructuralChange(
              scala.Option.<XFormsInstance>apply(modifiedInstanceOrNull),
              FlaggedDefaultsStrategy$.MODULE$);
    }

    // Gather list of modified nodes
    final List<NodeInfo> insertedNodeInfos;
    if (didInsertNodes && modifiedInstanceOrNull != null) {
      // Instance can be null if document into which delete is performed is not in an instance, e.g.
      // in a variable
      final DocumentWrapper documentWrapper =
          (DocumentWrapper) modifiedInstanceOrNull.documentInfo();
      insertedNodeInfos = new ArrayList<NodeInfo>(insertedNodes.size());
      for (Node insertedNode : insertedNodes)
        insertedNodeInfos.add(documentWrapper.wrap(insertedNode));
    } else {
      insertedNodeInfos = Collections.emptyList();
    }

    // "4. If the insert is successful, the event xforms-insert is dispatched."
    // XFormsInstance handles index and repeat items updates
    if (doDispatch && didInsertNodes && modifiedInstanceOrNull != null) {

      // Adjust insert location node and before/after/into in case the root element was replaced
      final NodeInfo adjustedInsertLocationNodeInfo;
      final String adjustedBeforeAfterInto;

      final NodeInfo parent =
          insertedNodeInfos.get(0).getNodeKind() == org.w3c.dom.Node.ELEMENT_NODE
              ? insertedNodeInfos.get(0).getParent()
              : null;
      if (parent != null && parent.equals(parent.getDocumentRoot())) {
        // Node was inserted under document node
        adjustedInsertLocationNodeInfo = parent.getDocumentRoot();
        adjustedBeforeAfterInto = "into";
      } else {
        adjustedInsertLocationNodeInfo = rewrapIfNeeded(insertLocationNodeInfo);
        adjustedBeforeAfterInto = beforeAfterInto;
      }

      Dispatch.dispatchEvent(
          new XFormsInsertEvent(
              modifiedInstanceOrNull,
              insertedNodeInfos,
              originItems,
              adjustedInsertLocationNodeInfo,
              adjustedBeforeAfterInto,
              insertLocationIndexWithinParentBeforeUpdate));
    }

    return insertedNodeInfos;
  }