public void startElement()

in src/main/java/org/apache/xmlgraphics/xmp/XMPHandler.java [119:199]
74 lines of code
20 McCabe index (conditional complexity)

    public void startElement(String uri, String localName, String qName, Attributes attributes)
                throws SAXException {
        super.startElement(uri, localName, qName, attributes);
        content.setLength(0); //Reset text buffer (see characters())
        attributesStack.push(new AttributesImpl(attributes));

        if (XMPConstants.XMP_NAMESPACE.equals(uri)) {
            if (!"xmpmeta".equals(localName)) {
                throw new SAXException("Expected x:xmpmeta element, not " + qName);
            }
            if (this.meta != null) {
                throw new SAXException("Invalid XMP document. Root already received earlier.");
            }
            this.meta = new Metadata();
            this.contextStack.push(this.meta);
            this.nestingInfoStack.push("metadata");
        } else if (XMPConstants.RDF_NAMESPACE.equals(uri)) {
            if ("RDF".equals(localName)) {
                if (this.meta == null) {
                    this.meta = new Metadata();
                    this.contextStack.push(this.meta);
                    this.nestingInfoStack.push("metadata");
                }
            } else if ("Description".equals(localName)) {
                String about = attributes.getValue(XMPConstants.RDF_NAMESPACE, "about");
                for (int i = 0, c = attributes.getLength(); i < c; i++) {
                    String ns = attributes.getURI(i);
                    if (XMPConstants.RDF_NAMESPACE.equals(ns)) {
                        //ignore
                    } else if (XMPConstants.XMLNS_NAMESPACE.equals(ns)) {
                        //ignore
                    } else if ("".equals(ns)) {
                        //ignore
                    } else {
                        String qn = attributes.getQName(i);
                        String v = attributes.getValue(i);
                        XMPProperty prop = new XMPProperty(new QName(ns, qn), v);
                        prop.attribute = true;
                        getCurrentProperties().setProperty(prop);
                    }
                }
                if (this.contextStack.peek().equals(this.meta)) {
                    //rdf:RDF is the parent
                } else {
                    if (about != null) {
                        throw new SAXException(
                                "Nested rdf:Description elements may not have an about property");
                    }
                    startStructure();
                }
            } else if ("Seq".equals(localName)) {
                XMPArray array = new XMPArray(XMPArrayType.SEQ);
                this.contextStack.push(array);
                this.nestingInfoStack.push("Seq");
            } else if ("Bag".equals(localName)) {
                XMPArray array = new XMPArray(XMPArrayType.BAG);
                this.contextStack.push(array);
                this.nestingInfoStack.push("Bag");
            } else if ("Alt".equals(localName)) {
                XMPArray array = new XMPArray(XMPArrayType.ALT);
                this.contextStack.push(array);
                this.nestingInfoStack.push("Alt");
            } else if ("li".equals(localName)) {
                //nop, handle in endElement()
            } else if ("value".equals(localName)) {
                QName name = new QName(uri, qName);
                this.contextStack.push(name);
                this.nestingInfoStack.push("prop:" + name);
            } else {
                throw new SAXException("Unexpected element in the RDF namespace: " + localName);
            }
        } else {
            if (getCurrentPropName() != null) {
                //Structure (shorthand form)
                startStructure();
            }
            QName name = new QName(uri, qName);
            this.contextStack.push(name);
            this.nestingInfoStack.push("prop:" + name);
        }
    }