* The function of the encoder is to traverse a tree of objects seializing them * out as xml as it goes. Navigation and serialization of the tree is performed by * instances of {@link org.geotools.xml.Binding} which are bound to types in the * schema. *
** To execute the encoder, one must have 3 bits of information: *
* As an exmaple, consider the encoding of a {@link org.opengis.filter.Filter} * instance. *
*
* //instantiate hte configuration for the filter schmea
* Configuration configuration = new OGCConfiguration();
*
* //create the encoder
* Encoder encoder = new Encoder( configuration );
*
* //get a filter
* Filter filter = ...;
*
* //get the name of the 'filter' element in the schema
* QName name = new QName( "http://www.opengis.net/ogc", "Filter" );
*
* //encode
* encoder.encode( filter, name );
*
*
*
* @author Justin Deoliveira, The Open Planning Project
*
*
*
*
* @source $URL$
*/
public class Encoder {
/**
* Special name recognized by the encoder as a comment.
* * Bindings can return this name in {@link ComplexBinding#getProperties(Object)} * to provide comments to be encoded. *
*/ public static final QName COMMENT = new QName("http://www.geotools.org", "comment"); /** the schema + index **/ private XSDSchema schema; private SchemaIndex index; /** binding factory + context **/ private BindingLoader bindingLoader; private MutablePicoContainer context; /** binding walker */ private BindingWalker bindingWalker; /** property extractors */ private List propertyExtractors; /** element encoder */ private ElementEncoder encoder; /** factory for creating nodes **/ private Document doc; /** namespaces */ private NamespaceSupport namespaces; /** document serializer **/ private ContentHandler serializer; /** schema location */ private HashMap schemaLocations; /** output format */ private OutputFormat outputFormat; /** namespace aware */ private boolean namespaceAware = true; /** true if we are encoding a full document */ private boolean inline = false; /** name of type of root element to encode */ private QName rootElementType; /** * Logger logger; */ private Logger logger; /** * Creates an encoder from a configuration. ** This constructor calls through to {@link #Encoder(Configuration, XSDSchema)} * obtaining the schema instance from {@link Configuration#schema()}. *
* @param configuration The encoder configuration. */ public Encoder(Configuration configuration) { this(configuration, configuration.schema()); } /** * Creates an encoder from a configuration and a specific schema * instance. * * @param configuration The encoder configuration. * @param schema The schema instance. */ public Encoder(Configuration configuration, XSDSchema schema) { this.schema = schema; index = new SchemaIndexImpl(new XSDSchema[] { schema }); bindingLoader = new BindingLoader(configuration.setupBindings()); bindingWalker = new BindingWalker(bindingLoader); //create the context context = new DefaultPicoContainer(); //register the binding factory in the context BindingFactory bindingFactory = new BindingFactoryImpl(bindingLoader); context.registerComponentInstance(bindingFactory); //register the element encoder in the context encoder = new ElementEncoder(bindingWalker, context); context.registerComponentInstance(encoder); //register the schema index context.registerComponentInstance(index); //bindign walker support context.registerComponentInstance(new BindingWalkerFactoryImpl(bindingLoader, context)); //pass the context off to the configuration context = configuration.setupContext(context); encoder.setContext(context); //schema location setup schemaLocations = new HashMap(); // get a logger from the context logger = (Logger) context.getComponentInstanceOfType(Logger.class); if (logger == null) { //create a default logger = org.geotools.util.logging.Logging.getLogger("org.geotools.xml"); context.registerComponentInstance(logger); } encoder.setLogger(logger); //namespaces namespaces = new NamespaceSupport(); context.registerComponentInstance(namespaces); context.registerComponentInstance(new NamespaceSupportWrapper(namespaces)); //add configuration to context; context.registerComponentInstance(configuration); //property extractors propertyExtractors = Schemas.getComponentInstancesOfType(context, PropertyExtractor.class); //add the property extractor for bindings as first propertyExtractors.add(0, new BindingPropertyExtractor(this, context)); outputFormat = new OutputFormat(); configuration.setupEncoder(this); } /** * Sets the charset encoding scheme to be used in encoding XML content. ** This encoding will determine the resulting character encoding for the XML * content generated by this Encoder and will be reflected in the XML * declaration tag. *
* * @param charset * the (non null) charset to encode XML content accordingly to */ public void setEncoding(final Charset charset) { final String charsetName = charset.name(); outputFormat.setEncoding(charsetName); } /** * Returns the Charset defining the character encoding scheme this Encoder * uses to encode XML content. *
* If not otherwise set through {@link #setEncoding(Charset)},
* UTF-8 is used.
*
true if XML declaration should be omitted
*/
public void setOmitXMLDeclaration(final boolean ommitXmlDeclaration) {
outputFormat.setOmitXMLDeclaration(ommitXmlDeclaration);
}
/**
* Returns true if the XML document declaration should be omitted. The
* default is false.
*
* @return whether the xml declaration is omitted, defaults to false.
*/
public boolean isOmitXMLDeclaration() {
return outputFormat.getOmitXMLDeclaration();
}
/**
* Sets the indentation on and off.
* * When set on, the default indentation level and default line wrapping is * used (see {@link #getIndentSize()} and {@link #getLineWidth()}). To * specify a different indentation level or line wrapping, use * {@link #setIndent(int)} and {@link #setLineWidth(int)}). *
* * @param doIndent *true if indentation should be on
*/
public void setIndenting(final boolean doIndent) {
outputFormat.setIndenting(doIndent);
}
/**
* Returns whether this Encoder produces indented XML.
*
* Defaults to false.
*
* @return true if indentation was specified
* @see #setIndentSize(int)
*/
public boolean isIndenting() {
return outputFormat.getIndenting();
}
/**
* Sets the indentation level in number of spaces used.
*
* The document will not be indented if the indentation is set to zero.
* Calling setIndenting(false) will reset this value to zero,
* calling it with true will reset this value to the default.
*
* If no indentation was specified, zero is returned and the document should * not be indented. *
*
* Defaults to 4
*
* If zero then no line wrapping will occur. Calling
* setIndenting(false) will reset this value to zero, calling
* setIndenting(true) will set this value to the default.
*
* When indenting, and only when indenting, long lines will be broken at * space boundaries based on this line width. No line wrapping occurs if * this value is zero. *
*
* Defaults to 72 characters per line.
*
* Warning that setting this to false will result in no
* namespace prefixes on encoded elements and attributes, and no schema
* declarations on the root element.document;
*
* Clients may register additional namespace mappings. This is useful when * an application whishes to provide some "default" namespace mappings. *
*
* Clients should register namespace mappings in the current "context", ie
* do not call {@link NamespaceSupport#pushContext()}. Example:
*
* Encoder parser = new Encoder( ... );
* encoder.getNamespaces().declarePrefix( "foo", "http://www.foo.com" );
* ...
*
*
* When this flag is set {@link #encode(Object, QName, ContentHandler)} should * be used to encode. *
*/ public void setInline(boolean inline) { this.inline = inline; } /** * Informs the encoder of the type of the root element to be used in cases where it can not be * inferred. ** This method is used in cases where the element being encoded is not declared as global in * the schema. *
* @param typeName The type name of the root element. * * @since 8.0 */ public void setRootElementType(QName rootElementType) { this.rootElementType = rootElementType; } /** * Sets the schema location for a particular namespace uri. ** Registering a schema location will include it on the "schemaLocation" attribute of the * root element of the encoding. *
* @param namespaceURI A namespace uri. * @param location A schema location. * */ public void setSchemaLocation(String namespaceURI, String location) { schemaLocations.put(namespaceURI, location); } /** * Sets hte output format to be used by the encoder. * * @param outputFormat The output format. * @deprecated use the various setters instead (setEncoding, setIndentation, etc) */ public void setOutputFormat(OutputFormat outputFormat) { this.outputFormat = outputFormat; } /** * @return The walker used to traverse bindings, this method is for internal use only. */ public BindingWalker getBindingWalker() { return bindingWalker; } /** * @return The index of schema components, this method is for internal use only. */ public SchemaIndex getSchemaIndex() { return index; } /** * @return the schema. */ public XSDSchema getSchema() { return schema; } /** * @deprecated use {@link #encode(Object, QName, OutputStream)}. * */ public void write(Object object, QName name, OutputStream out) throws IOException, SAXException { encode(object, name, out); } /** * @return The document used as a factory to create dom nodes. */ public Document getDocument() { return doc; } /** * Encodes an object. ** An object is encoded as an object, name pair, where the name is the name * of an element declaration in a schema. *
* @param object The object being encoded. * @param name The name of the element being encoded in the schema. * @param out The output stream. * * @throws IOException */ public void encode(Object object, QName name, OutputStream out) throws IOException { if ( inline ) { String msg = "Must use 'encode(Object,QName,ContentHandler)' when inline flag is set"; throw new IllegalStateException( msg ); } //create the document seriaizer XMLSerializer xmls = new XMLSerializer(out, outputFormat); xmls.setNamespaces(namespaceAware); try { encode(object, name, xmls); } catch (SAXException e) { // SAXException does not sets initCause(). Instead, it holds its own // "exception" field. if (e.getException() != null && e.getCause() == null) { e.initCause(e.getException()); } throw (IOException) new IOException().initCause(e); } } public void encode(Object object, QName name, ContentHandler handler) throws IOException, SAXException { //maintain a stack of (encoding,element declaration pairs) Stack encoded = null; try { serializer = handler; if (!inline) { serializer.startDocument(); } if (namespaceAware) { //write out all the namespace prefix value mappings for ( Enumeration e = namespaces.getPrefixes(); e.hasMoreElements(); ) { String prefix = (String) e.nextElement(); String uri = namespaces.getURI( prefix ); if ( "xml".equals( prefix ) ) { continue; } serializer.startPrefixMapping( prefix , uri ); } for (Iterator itr = schema.getQNamePrefixToNamespaceMap().entrySet().iterator(); itr.hasNext();) { Map.Entry entry = (Map.Entry) itr.next(); String pre = (String) entry.getKey(); String ns = (String) entry.getValue(); if (XSDUtil.SCHEMA_FOR_SCHEMA_URI_2001.equals(ns)) { continue; } serializer.startPrefixMapping(pre, ns); serializer.endPrefixMapping(pre); namespaces.declarePrefix((pre != null) ? pre : "", ns); } //ensure a default namespace prefix set if (namespaces.getURI("") == null) { namespaces.declarePrefix("", schema.getTargetNamespace()); } } //create the document DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); try { doc = docFactory.newDocumentBuilder().newDocument(); } catch (ParserConfigurationException e) { new IOException().initCause(e); } encoded = new Stack(); //add the first entry XSDElementDeclaration root = index.getElementDeclaration(name); if (root == null) { //check for context hint, this is only used when running the encoder // in test mode QName typeDefintion = rootElementType; if (typeDefintion == null) { typeDefintion = (QName) context.getComponentInstance("http://geotools.org/typeDefinition"); } if (typeDefintion != null) { XSDTypeDefinition type = index.getTypeDefinition(typeDefintion); if (type == null) { throw new NullPointerException(); } //create a mock element declaration root = XSDFactory.eINSTANCE.createXSDElementDeclaration(); root.setName(name.getLocalPart()); root.setTargetNamespace(name.getNamespaceURI()); root.setTypeDefinition(type); } } if (root == null) { String msg = "Could not find element declaration for:" + name; throw new IllegalArgumentException(msg); } encoded.add(new EncodingEntry(object, root, null)); while (!encoded.isEmpty()) { EncodingEntry entry = (EncodingEntry) encoded.peek(); if (entry.encoding != null) { //element has been started, get the next child if (!entry.children.isEmpty()) { Object[] child = (Object[]) entry.children.get(0); XSDElementDeclaration element = (XSDElementDeclaration) child[0]; Iterator itr = (Iterator) child[1]; if (itr.hasNext()) { Object next = itr.next(); if ( next == null ) { logger.warning( "Iterator returned null for " + element.getName() ); } //here we check for instanceof EncoderDelegate if ( next instanceof EncoderDelegate ) { //do not add entry to the stack, just delegate to encode try { ((EncoderDelegate) next).encode(handler); } catch (Exception e) { throw new RuntimeException( e ); } } else { //add the next object to be encoded to the stack encoded.push(new EncodingEntry(next, element,entry)); } } else { //iterator done, close it Object source = child[2]; closeIterator(itr,source); //this child is done, remove from child list entry.children.remove(0); } } else { // no more children, finish the element end(entry.encoding); encoded.pop(); //clean up the entry entry.object = null; entry.element = null; entry.encoding = null; entry.children = null; entry.parent = null; } } else { //start the encoding of the entry //first make sure the element is not abstract if (entry.element.isAbstract()) { // look for a non abstract substitute - substitution groups are subject to // changes over time, so we make a copy to avoid being hit with a ConcurrentModificationException List sub = safeCopy(entry.element.getSubstitutionGroup()); if (sub.size() > 0) { //match up by type List matches = new ArrayList(); for (Iterator s = sub.iterator(); s.hasNext();) { XSDElementDeclaration e = (XSDElementDeclaration) s.next(); if (e == null || e.equals(entry.element)) { continue; } if (e.getName() == null) { continue; } //look up hte binding Binding binding = bindingLoader.loadBinding(new QName( e.getTargetNamespace(), e.getName()), context); if (binding == null) { //try the type XSDTypeDefinition type = e.getType(); if (type == null || type.getName() == null) { continue; } binding = bindingLoader.loadBinding(new QName( type.getTargetNamespace(), type.getName()), context); } if (binding == null) { continue; } if (binding.getType() == null) { logger.warning( "Binding: " + binding.getTarget() + " returns null type."); continue; } //match up the type if (binding.getType().isAssignableFrom(entry.object.getClass())) { //we have a match, store as an (element,binding) tuple matches.add(new Object[] { e, binding }); } } //if one, we are gold if (matches.size() == 1) { entry.element = (XSDElementDeclaration) ((Object[]) matches.get(0))[0]; } //if multiple we have a problem else if (matches.size() > 0) { if (logger.isLoggable(Level.FINE)) { StringBuffer msg = new StringBuffer( "Found multiple non-abstract bindings for "); msg.append(entry.element.getName()).append(": "); for (Iterator m = matches.iterator(); m.hasNext();) { msg.append(m.next().getClass().getName()); msg.append(", "); } logger.fine(msg.toString()); } //try sorting by the type of the binding Collections.sort(matches, new Comparator() { public int compare(Object o1, Object o2) { Object[] match1 = (Object[]) o1; Object[] match2 = (Object[]) o2; Binding b1 = (Binding) match1[1]; Binding b2 = (Binding) match2[1]; if ( b1.getType() != b2.getType() ) { if (b2.getType().isAssignableFrom(b1.getType())) { return -1; } if (b1.getType().isAssignableFrom(b2.getType())) { return 1; } } //use binding comparability if (b1 instanceof Comparable) { return ((Comparable) b1).compareTo(b2); } if (b2 instanceof Comparable) { return -1 * ((Comparable) b2).compareTo(b1); } return 0; } }); } if (matches.size() > 0) { entry.element = (XSDElementDeclaration) ((Object[]) matches.get(0))[0]; } //if zero, just use the abstract element } } if (entry.element.isAbstract()) { logger.fine(entry.element.getName() + " is abstract"); } entry.encoding = entry.parent != null ? (Element) encode(entry.object, entry.element, entry.parent.element.getType()) : (Element) encode(entry.object, entry.element); //add any more attributes List attributes = index.getAttributes(entry.element); for (Iterator itr = attributes.iterator(); itr.hasNext();) { XSDAttributeDeclaration attribute = (XSDAttributeDeclaration) itr.next(); //do not encode the attribute if it has already been // encoded by the parent String ns = attribute.getTargetNamespace(); String local = attribute.getName(); if ((entry.encoding.getAttributeNS(ns, local) != null) && !"".equals(entry.encoding.getAttributeNS(ns, local))) { continue; } //get the object(s) for this attribute GetPropertyExecutor executor = new GetPropertyExecutor(entry.object, attribute); BindingVisitorDispatch.walk(object, bindingWalker, entry.element, executor, context); if (executor.getChildObject() != null) { //encode the attribute Attr attr = (Attr) encode(executor.getChildObject(), attribute); if (attr != null) { entry.encoding.setAttributeNodeNS(attr); } } } //write out the leading edge of the element if (schemaLocations != null) { //root element, add schema locations if set if (!schemaLocations.isEmpty()) { //declare the schema instance mapping serializer.startPrefixMapping("xsi", XSDUtil.SCHEMA_INSTANCE_URI_2001); serializer.endPrefixMapping("xsi"); namespaces.declarePrefix("xsi", XSDUtil.SCHEMA_INSTANCE_URI_2001); StringBuffer schemaLocation = new StringBuffer(); for (Iterator e = schemaLocations.entrySet().iterator(); e.hasNext();) { Map.Entry tuple = (Map.Entry) e.next(); String namespaceURI = (String) tuple.getKey(); String location = (String) tuple.getValue(); schemaLocation.append(namespaceURI + " " + location); if (e.hasNext()) { schemaLocation.append(" "); } } entry.encoding.setAttributeNS(XSDUtil.SCHEMA_INSTANCE_URI_2001, "xsi:schemaLocation", schemaLocation.toString()); } schemaLocations = null; } start(entry.encoding, entry.element); //TODO: this method of getting at properties wont maintain order very well, need // to come up with a better system that is capable of hanlding feature types for (Iterator pe = propertyExtractors.iterator(); pe.hasNext();) { PropertyExtractor propertyExtractor = (PropertyExtractor) pe.next(); if (propertyExtractor.canHandle(entry.object)) { List extracted = propertyExtractor.properties(entry.object, entry.element); O: for (Iterator e = extracted.iterator(); e.hasNext();) { Object[] tuple = (Object[]) e.next(); XSDParticle particle = (XSDParticle) tuple[0]; XSDElementDeclaration child = (XSDElementDeclaration) particle .getContent(); //check for a comment if ((child != null) && (COMMENT.getNamespaceURI().equals(child.getTargetNamespace())) && COMMENT.getLocalPart().equals(child.getName())) { comment(child.getElement()); continue; } if (child.isElementDeclarationReference()) { child = child.getResolvedElementDeclaration(); } //do not encode the element if the parent has already // been encoded by the parent String ns = child.getTargetNamespace(); String local = child.getName(); for (int i = 0; i < entry.encoding.getChildNodes().getLength(); i++) { Node node = entry.encoding.getChildNodes().item(i); if (node instanceof Element) { if (ns != null) { if (ns.equals(node.getNamespaceURI()) && local.equals(node.getLocalName())) { continue O; } } else { if (local.equals(node.getLocalName())) { continue O; } } } } Object obj = tuple[1]; if (obj == null) { if (particle.getMinOccurs() == 0) { //cool } else { //log an error logger.fine("Property " + ns + ":" + local + " not found but minoccurs > 0 "); } //skip this regardless continue; } //figure out the maximum number of occurences int maxOccurs = 1; if (particle.isSetMaxOccurs()) { maxOccurs = particle.getMaxOccurs(); } else { //look the containing group if (particle.eContainer() instanceof XSDModelGroup) { XSDModelGroup group = (XSDModelGroup) particle.eContainer(); if (group.eContainer() instanceof XSDParticle) { XSDParticle cParticle = (XSDParticle) group.eContainer(); if (cParticle.isSetMaxOccurs()) { maxOccurs = cParticle.getMaxOccurs(); } } } } if ((maxOccurs == -1) || (maxOccurs > 1)) { //may have a collection or array, unwrap it Iterator iterator = null; if (obj instanceof Iterator) { iterator = (Iterator) obj; } else if (obj.getClass().isArray()) { Object[] array = (Object[]) obj; iterator = Arrays.asList(array).iterator(); } else if (obj instanceof Collection) { Collection collection = (Collection) obj; iterator = collection.iterator(); } else if (obj instanceof FeatureCollection) { FeatureCollection collection = (FeatureCollection) obj; iterator = collection.iterator(); } else { iterator = new SingleIterator(obj); } entry.children.add(new Object[] { child, iterator, obj }); } else { //only one, just add the object entry.children.add(new Object[] { child, new SingleIterator(obj), obj }); } } } } } } if (!inline) { serializer.endDocument(); } } finally { //cleanup index.destroy(); //close any iterators still present in the stack, this will only occur in an exception // case if (encoded != null) { while(!encoded.isEmpty()) { EncodingEntry entry = (EncodingEntry) encoded.pop(); if (!entry.children.isEmpty()) { Object[] child = (Object[]) entry.children.get(0); Iterator itr = (Iterator) child[1]; try { closeIterator(itr,child[2]); } catch( Exception e ) { //ignore, we are already in an error case. } } } } //TODO: there are probably other refences to elements of XSDScheam objects, we should // kill them too } } /** * Makes a defensive copy of an e-list handling the eventual issues due to concurrent modifications * @param substitutionGroup * @return */ private List safeCopy(EList substitutionGroup) { while(true) { try { return new ArrayList(substitutionGroup); } catch(ArrayIndexOutOfBoundsException e) { // ok, the list was modified just during the copy... } } } /** * Encodes an object directly to a dom. ** Note that this method should be used for testing or convenience since * it does not stream and loads the entire encoded result into memory. *
*/ public Document encodeAsDOM( Object object, QName name ) throws IOException, SAXException, TransformerException { ByteArrayOutputStream out = new ByteArrayOutputStream(); encode( object, name, out ); ByteArrayInputStream in = new ByteArrayInputStream( out.toByteArray() ); DOMResult result = new DOMResult(); Transformer tx = TransformerFactory.newInstance().newTransformer(); tx.transform( new StreamSource( in ), result ); return (Document) result.getNode(); } /** * Encodes an object directly to a string. ** Note that this method should be used for testing or convenience since * it does not stream and loads the entire encoded result into memory. *
* @since 8.0 */ public String encodeAsString(Object object, QName name ) throws IOException { ByteArrayOutputStream out = new ByteArrayOutputStream(); encode( object, name, out ); return new String(out.toByteArray()); } protected void closeIterator(Iterator itr, Object source) { //special case check here for feature collection // we need to ensure the iterator is closed properly if ( source instanceof FeatureCollection ) { //only close the iterator if not just a wrapping one if ( !( itr instanceof SingleIterator ) ) { ((FeatureCollection)source).close( itr ); } } } protected Node encode(Object object, XSDNamedComponent component) { return encode( object, component, null ); } protected Node encode(Object object, XSDNamedComponent component, XSDTypeDefinition container ) { if (component instanceof XSDElementDeclaration) { XSDElementDeclaration element = (XSDElementDeclaration) component; return encoder.encode(object, element, doc, container ); } else if (component instanceof XSDAttributeDeclaration) { XSDAttributeDeclaration attribute = (XSDAttributeDeclaration) component; return encoder.encode(object, attribute, doc, container); } return null; } protected void start(Element element, XSDElementDeclaration declaration) throws SAXException { String uri, local, qName; if (element.getLocalName() != null) { uri = element.getNamespaceURI(); local = element.getLocalName(); } else { //namespace unaware dom tree local = element.getNodeName(); if (local.contains(":")) { String[] split = local.split(":"); local = split[1]; uri = namespaces.getURI(split[0]); } else { uri = null; } } qName = local; NamespaceSupport namespaces = this.namespaces; // declaration == null -> gml3 envelope encoding test failing // declaration.getSchema() == null -> wfs 2.0 feature collection encoding test failing if (namespaceAware && (declaration == null || declaration.isGlobal() || declaration.getSchema() == null || declaration.getSchema().getElementFormDefault() == XSDForm.QUALIFIED_LITERAL)) { uri = (uri != null) ? uri : namespaces.getURI(""); qName = namespaces.getPrefix(uri) + ":" + qName; } else { uri = ""; } DOMAttributes atts = new DOMAttributes(element.getAttributes(), namespaces); serializer.startElement(uri, local, qName, atts); //write out any text for (int i = 0; i < element.getChildNodes().getLength(); i++) { Node node = (Node) element.getChildNodes().item(i); if (node instanceof Text) { char[] ch = ((Text) node).getData().toCharArray(); serializer.characters(ch, 0, ch.length); } } //write out any child elements for (int i = 0; i < element.getChildNodes().getLength(); i++) { Node node = (Node) element.getChildNodes().item(i); if (node instanceof Element) { Element child = (Element) node; start(child, declaration != null ? Schemas.getChildElementDeclaration(declaration, new QName(child.getNamespaceURI(), child.getNodeName())) : null); end(child); } } //push a new context for children, declaring the default prefix to be the one of this // element this.namespaces.pushContext(); if (uri != null) { this.namespaces.declarePrefix("", uri); } } protected void comment(Element element) throws SAXException, IOException { if (serializer instanceof XMLSerializer) { NodeList children = element.getChildNodes(); for (int i = 0; i < children.getLength(); i++) { Node text = (Node) children.item(i); ((XMLSerializer) serializer).comment(text.getNodeValue()); } } } protected void end(Element element) throws SAXException { //push off last context namespaces.popContext(); String uri = element.getNamespaceURI(); String local = element.getLocalName(); String qName = element.getLocalName(); if ((element.getPrefix() != null) && !"".equals(element.getPrefix())) { qName = element.getPrefix() + ":" + qName; } serializer.endElement(uri, local, qName); } private static class NullIterator implements Iterator { public void remove() { // do nothing } public boolean hasNext() { return false; } public Object next() { // TODO Auto-generated method stub return null; } } private static class SingleIterator implements Iterator { Object object; boolean more; public SingleIterator(Object object) { this.object = object; more = true; } public void remove() { //unsupported } public boolean hasNext() { return more; } public Object next() { more = false; return object; } } /** * Encoding stack entries. */ private static class EncodingEntry { public Object object; public XSDElementDeclaration element; public Element encoding; public List children; //list of (element,iterator) tuples public EncodingEntry parent; public EncodingEntry(Object object, XSDElementDeclaration element, EncodingEntry parent) { this.object = object; this.element = element; this.parent = parent; children = new ArrayList(); } } private static class DOMAttributes implements Attributes { NamedNodeMap atts; NamespaceSupport namespaces; public DOMAttributes(NamedNodeMap atts, NamespaceSupport namespaces) { this.atts = atts; this.namespaces = namespaces; } public int getLength() { return atts.getLength(); } public String getLocalName(int index) { return atts.item(index).getLocalName(); } public String getQName(int index) { Node n = atts.item(index); if (namespaces != null) { String uri = n.getNamespaceURI(); String prefix = (uri != null) ? namespaces.getPrefix(uri) : null; if (prefix != null) { return prefix + ":" + n.getLocalName(); } } return n.getLocalName() != null ? n.getLocalName() : n.getNodeName(); } public String getType(int index) { return "CDATA"; //TODO: this properly } public String getURI(int index) { return atts.item(index).getNamespaceURI(); } public String getValue(int index) { return atts.item(index).getNodeValue(); } public int getIndex(String qName) { String pre = null; String local = null; if (qName.lastIndexOf(':') != -1) { String[] split = qName.split(":"); pre = split[0]; local = split[1]; } else { pre = ""; local = qName; } for (int i = 0; i < atts.getLength(); i++) { Node att = (Node) atts.item(i); if (att.getLocalName().equals(local)) { String apre = att.getPrefix(); if (apre == null) { apre = ""; } if (pre.equals(apre)) { return i; } } } return -1; } public String getType(String qName) { return getType(getIndex(qName)); } public String getValue(String qName) { return getValue(getIndex(qName)); } public int getIndex(String uri, String localName) { if ((uri == null) || uri.equals("")) { return getIndex(localName); } return getIndex(uri + ":" + localName); } public String getType(String uri, String localName) { return getType(getIndex(uri, localName)); } public String getValue(String uri, String localName) { return getValue(getIndex(uri, localName)); } } }