private static void writeStartElement()

in core/src/main/java/org/apache/cxf/staxutils/StaxUtils.java [780:887]
93 lines of code
31 McCabe index (conditional complexity)

    private static void writeStartElement(XMLStreamReader reader, XMLStreamWriter writer)
        throws XMLStreamException {
        String uri = reader.getNamespaceURI();
        String prefix = reader.getPrefix();
        String local = reader.getLocalName();

        if (prefix == null) {
            prefix = "";
        }

        boolean writeElementNS = false;

        if (uri != null) {
            writeElementNS = true;
            Iterator<String> it = CastUtils.cast(writer.getNamespaceContext().getPrefixes(uri));
            if (!it.hasNext() && StringUtils.isEmpty(prefix) && StringUtils.isEmpty(uri)
                && StringUtils.isEmpty(writer.getNamespaceContext().getNamespaceURI(""))) {
                writeElementNS = false;
            }
            while (it.hasNext()) {
                String s = it.next();
                if (s == null) {
                    s = "";
                }
                if (s.equals(prefix)) {
                    writeElementNS = false;
                }
            }
        }

        // Write out the element name
        if (uri != null) {
            if (prefix.isEmpty() && StringUtils.isEmpty(uri)) {
                writer.writeStartElement(local);
            } else {
                writer.writeStartElement(prefix, local, uri);
            }
        } else {
            writer.writeStartElement(local);
        }

        // Write out the namespaces
        for (int i = 0; i < reader.getNamespaceCount(); i++) {
            String nsURI = reader.getNamespaceURI(i);
            String nsPrefix = reader.getNamespacePrefix(i);
            if (nsPrefix == null) {
                nsPrefix = "";
            }
            if (nsURI == null) {
                nsURI = "";
            }
            if (nsPrefix.isEmpty()) {
                writer.writeDefaultNamespace(nsURI);
                writer.setDefaultNamespace(nsURI);
            } else {
                writer.writeNamespace(nsPrefix, nsURI);
                writer.setPrefix(nsPrefix, nsURI);
            }

            if (nsURI.equals(uri) && nsPrefix.equals(prefix)) {
                writeElementNS = false;
            }
        }

        // Check if the namespace still needs to be written.
        // We need this check because namespace writing works
        // different on Woodstox and the RI.
        if (writeElementNS) {
            if (prefix.isEmpty()) {
                writer.writeDefaultNamespace(uri);
                writer.setDefaultNamespace(uri);
            } else {
                writer.writeNamespace(prefix, uri);
                writer.setPrefix(prefix, uri);
            }
        }

        // Write out attributes
        for (int i = 0; i < reader.getAttributeCount(); i++) {
            String ns = reader.getAttributeNamespace(i);
            String nsPrefix = reader.getAttributePrefix(i);
            if (ns == null || ns.isEmpty()) {
                writer.writeAttribute(reader.getAttributeLocalName(i), reader.getAttributeValue(i));
            } else if (nsPrefix == null || nsPrefix.isEmpty()) {
                writer.writeAttribute(reader.getAttributeNamespace(i), reader.getAttributeLocalName(i),
                                      reader.getAttributeValue(i));
            } else {
                Iterator<String> it = CastUtils.cast(writer.getNamespaceContext().getPrefixes(ns));
                boolean writeNs = true;
                while (it != null && it.hasNext()) {
                    String s = it.next();
                    if (s == null) {
                        s = "";
                    }
                    if (s.equals(nsPrefix)) {
                        writeNs = false;
                    }
                }
                if (writeNs) {
                    writer.writeNamespace(nsPrefix, ns);
                    writer.setPrefix(nsPrefix, ns);
                }
                writer.writeAttribute(reader.getAttributePrefix(i), reader.getAttributeNamespace(i), reader
                    .getAttributeLocalName(i), reader.getAttributeValue(i));
            }

        }
    }