Examples with DefaultHierarchyVisitorCallback com.helger.commons.hierarchy.visit.DefaultHierarchyVisitorCallback used on opensource projects

Example 1 with DefaultHierarchyVisitorCallback

use of com.helger.commons.hierarchy.visit.DefaultHierarchyVisitorCallback in project ph-schematron by phax.

the class SchematronHelper method _recursiveResolveAllSchematronIncludes.

@SuppressFBWarnings("RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE")
@Nonnull
private static ESuccess _recursiveResolveAllSchematronIncludes(@Nonnull final IMicroElement eRoot, @Nonnull final IReadableResource aResource, @Nullable final ISAXReaderSettings aSettings, @Nonnull final IPSErrorHandler aErrorHandler) {
    if (eRoot != null) {
        final DefaultSchematronIncludeResolver aIncludeResolver = new DefaultSchematronIncludeResolver(aResource);
        for (final IMicroElement aElement : eRoot.getAllChildElementsRecursive()) if (CSchematron.NAMESPACE_SCHEMATRON.equals(aElement.getNamespaceURI()) && aElement.getLocalName().equals(CSchematronXML.ELEMENT_INCLUDE)) {
            String sHref = aElement.getAttributeValue(CSchematronXML.ATTR_HREF);
            try {
                final int nHashIndex = sHref.indexOf('#');
                String sAnchor = null;
                if (nHashIndex >= 0) {
                    sAnchor = sHref.substring(nHashIndex + 1);
                    sHref = sHref.substring(0, nHashIndex);
                }
                final IReadableResource aIncludeRes = aIncludeResolver.getResolvedSchematronResource(sHref);
                if (aIncludeRes == null) {
                    aErrorHandler.error(aResource, null, "Failed to resolve include '" + sHref + "'", null);
                    return ESuccess.FAILURE;
                }
                if (s_aLogger.isDebugEnabled())
                    s_aLogger.debug("Resolved '" + sHref + "' relative to '" + aIncludeResolver.getBaseHref() + "' as '" + aIncludeRes.getPath() + "'");
                // Read XML to be included
                final IMicroDocument aIncludedDoc = MicroReader.readMicroXML(aIncludeRes, aSettings);
                if (aIncludedDoc == null) {
                    aErrorHandler.error(aResource, null, "Failed to parse include " + aIncludeRes, null);
                    return ESuccess.FAILURE;
                }
                IMicroElement aIncludedContent;
                if (sAnchor == null) {
                    // no anchor present - include the whole document
                    // Return the document element
                    aIncludedContent = aIncludedDoc.getDocumentElement();
                } else {
                    final String sFinalAnchor = sAnchor;
                    final Wrapper<IMicroElement> aMatch = new Wrapper<>();
                    // Also include the root element in the search
                    ChildrenProviderHierarchyVisitor.visitFrom(aIncludedDoc.getDocumentElement(), new DefaultHierarchyVisitorCallback<IMicroNode>() {

                        @Override
                        public EHierarchyVisitorReturn onItemBeforeChildren(final IMicroNode aItem) {
                            if (aItem.isElement()) {
                                final IMicroElement aCurElement = (IMicroElement) aItem;
                                final String sID = aCurElement.getAttributeValue("id");
                                if (sFinalAnchor.equals(sID))
                                    aMatch.set(aCurElement);
                            }
                            return EHierarchyVisitorReturn.CONTINUE;
                        }
                    }, true);
                    aIncludedContent = aMatch.get();
                    if (aIncludedContent == null) {
                        aErrorHandler.warn(aResource, null, "Failed to resolve an element with the ID '" + sAnchor + "' in " + aIncludeRes + "! Therefore including the whole document!");
                        aIncludedContent = aIncludedDoc.getDocumentElement();
                    }
                }
                // Important to detach from parent!
                aIncludedContent.detachFromParent();
                // Check for correct namespace URI of included content
                if (!CSchematron.NAMESPACE_SCHEMATRON.equals(aIncludedContent.getNamespaceURI())) {
                    aErrorHandler.error(aResource, null, "The included resource " + aIncludeRes + " contains the wrong XML namespace URI '" + aIncludedContent.getNamespaceURI() + "' but was expected to have '" + CSchematron.NAMESPACE_SCHEMATRON + "'", null);
                    return ESuccess.FAILURE;
                }
                // Check that not a whole Schema but only a part is included
                if (CSchematronXML.ELEMENT_SCHEMA.equals(aIncludedContent.getLocalName())) {
                    aErrorHandler.warn(aResource, null, "The included resource " + aIncludeRes + " seems to be a complete schema. To includes parts of a schema the respective element must be the root element of the included resource.");
                }
                // Recursive resolve includes
                if (_recursiveResolveAllSchematronIncludes(aIncludedContent, aIncludeRes, aSettings, aErrorHandler).isFailure())
                    return ESuccess.FAILURE;
                // Now replace "include" element with content in MicroDOM
                aElement.getParent().replaceChild(aElement, aIncludedContent);
            } catch (final IOException ex) {
                aErrorHandler.error(aResource, null, "Failed to read include '" + sHref + "'", ex);
                return ESuccess.FAILURE;
            }
        }
    }
    return ESuccess.SUCCESS;
}