/**
* Obtain values from XML an create value object ContentRelation.
*
* @param xml The content relation XML (validated by schema).
* @return ContentRelation
* @throws InvalidContentException Thrown if content is invalid
* @throws MissingAttributeValueException Thrown if attribute value is missing
* @throws SystemException Thrown if internal error occur
* @throws de.escidoc.core.common.exceptions.application.invalid.XmlCorruptedException
*/
private static ContentRelationCreate parseContentRelation(final String xml)
throws MissingAttributeValueException, InvalidContentException, SystemException,
XmlCorruptedException {
final StaxParser sp = new StaxParser();
final ContentRelationHandler contentRelationHandler = new ContentRelationHandler(sp);
sp.addHandler(contentRelationHandler);
try {
sp.parse(xml);
} catch (final InvalidContentException e) {
throw new InvalidContentException(e.getMessage(), e);
} catch (final RelationPredicateNotFoundException e) {
// shouldn't happen
throw new SystemException(e);
} catch (final XmlCorruptedException e) {
throw new XmlCorruptedException(e.getMessage(), e);
} catch (final MissingAttributeValueException e) {
throw new MissingAttributeValueException(e.getMessage(), e);
} catch (final InvalidStatusException e) {
// shouldn't happen
throw new SystemException(e);
} catch (final SystemException e) {
throw new SystemException(null, e);
} catch (final Exception e) {
XmlUtility.handleUnexpectedStaxParserException(null, e);
}
return contentRelationHandler.getContentRelation();
}
/**
* See Interface for functional description.
*
* @param xmlData aggregationDefinition as xml in aggregationDefinition schema.
* @return Returns the XML representation of the resource.
* @throws MissingMethodParameterException ex
* @throws ScopeNotFoundException ex
* @throws SystemException ex
* @see de.escidoc.core.sm.business.interfaces
* .AggregationDefinitionHandlerInterface#create(java.lang.String)
*/
@Override
@Transactional(rollbackFor = {SystemException.class, RuntimeException.class})
public String create(final String xmlData)
throws MissingMethodParameterException, ScopeNotFoundException, SystemException {
if (xmlData == null || xmlData.length() == 0) {
throw new MissingMethodParameterException("xml may not be null");
}
// parse
final StaxParser sp = new StaxParser();
final AggregationDefinitionStaxHandler handler = new AggregationDefinitionStaxHandler(sp);
sp.addHandler(handler);
try {
sp.parse(xmlData);
} catch (final Exception e) {
throw new SystemException(e);
}
final String scopeId = handler.getAggregationDefinition().getScope().getId();
final Scope scope = scopesDao.retrieve(scopeId);
// get AggregationDefinitionObject to insert aggregation-definition
// into database
final AggregationDefinition aggregationDefinition = handler.getAggregationDefinition();
aggregationDefinition.setCreatorId(utility.getCurrentUserId());
aggregationDefinition.setCreationDate(new Timestamp(System.currentTimeMillis()));
aggregationDefinition.setScope(scope);
dao.save(aggregationDefinition);
handler.setAggregationDefinition(aggregationDefinition);
// AggregationStatisticDataSelectors
for (final AggregationStatisticDataSelector selector :
handler.getAggregationStatisticDataSelectors()) {
dao.save(selector);
}
aggregationDefinition.setAggregationStatisticDataSelectors(
handler.getAggregationStatisticDataSelectors());
// AggregationTables
for (final AggregationTable aggregationTable : handler.getAggregationTables()) {
dao.save(aggregationTable);
}
aggregationDefinition.setAggregationTables(handler.getAggregationTables());
// Get databaseTableVos for all Aggregation-Tables
// defined in Aggregation Definition
final Collection<DatabaseTableVo> databaseTableVos =
generateAggregationDatabaseTableVos(aggregationDefinition);
if (databaseTableVos != null) {
for (final DatabaseTableVo databaseTableVo : databaseTableVos) {
// create aggregation table in Database
dbAccessor.createTable(databaseTableVo);
}
}
return renderer.render(aggregationDefinition);
}
/**
* Handle the start of an element.
*
* @param element The element.
* @return The element.
* @throws MissingAttributeValueException If a required element is not set.
* @throws InvalidContentException If the parsed XML contains not allowed parts.
* @throws WebserverSystemException If the eSciDoc configuration file can not be read. FIXME
* should probably not be thrown so late.
*/
@Override
public StartElement startElement(final StartElement element)
throws MissingAttributeValueException, InvalidContentException, WebserverSystemException {
final String currentPath = parser.getCurPath();
if (currentPath.equals(this.metadataXPath)) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Parser reached " + this.metadataXPath);
}
this.curMdRecordDefinition = new MdRecordDefinitionCreate();
try {
curMdRecordDefinition.setName(element.getAttributeValue(null, "name"));
} catch (final NoSuchAttributeException e) {
throw new InvalidContentException("Attribute name required for md-record-definition.", e);
}
} else if (currentPath.equals(this.metadataXPath + "/schema")) {
try {
curMdRecordDefinition.setSchemaHref(
element.getAttributeValue(Constants.XLINK_NS_URI, "href"));
} catch (final MalformedURLException e) {
throw new InvalidContentException(e);
} catch (final IOException e) {
throw new WebserverSystemException("Configuration could not be read.", e);
} catch (final NoSuchAttributeException e) {
throw new InvalidContentException("No href for schema element.", e);
}
}
return element;
}
@Override
public String characters(final String data, final StartElement element)
throws IntegritySystemException {
final String curPath = parser.getCurPath();
final String theName = element.getLocalName();
// organizational-unit
if (curPath.equals(DC_PATH + '/' + Elements.ELEMENT_DC_TITLE)) {
if (data.length() == 0) {
properties.put(Elements.ELEMENT_DC_TITLE, "");
properties.put(TripleStoreUtility.PROP_DC_TITLE, "");
} else {
// propertiesMap.put(theName, data);
properties.put(Elements.ELEMENT_DC_TITLE, data);
properties.put(TripleStoreUtility.PROP_DC_TITLE, data);
}
} else if (theName.equals(Elements.ELEMENT_DESCRIPTION)) {
if (data.length() == 0) {
properties.put(Elements.ELEMENT_DESCRIPTION, "");
properties.put(TripleStoreUtility.PROP_DC_DESCRIPTION, "");
} else {
// propertiesMap.put(theName, data);
properties.put(Elements.ELEMENT_DESCRIPTION, data);
properties.put(TripleStoreUtility.PROP_DC_DESCRIPTION, data);
}
}
return data;
}
public StartElement startElement(StartElement element) {
String currentPath = parser.getCurPath();
if (itemPath.equals(currentPath) || containerPath.equals(currentPath)) {
membersCount++;
}
return element;
}
@Override
public EndElement endElement(final EndElement element) {
final String currentPath = parser.getCurPath();
if (currentPath.equals(this.metadataXPath)) {
this.mdRecordDefinitions.add(this.curMdRecordDefinition);
}
return element;
}
/**
* Parser hits an XML character element. Write all elements and all attributes with path to
* element and value (eg /properties/version/status=released) in a list. If attribute is
* xlink:href, extract objectId out of href and replace attribute-name in path with /id.
*
* @param s XML character element.
* @param element StAX StartElement
* @return XML character element.
*/
@Override
public String characters(final String s, final StartElement element)
throws UnsupportedEncodingException {
String path = parser.getCurPath().replaceFirst("/.*?/", "/");
if (path.equals(parser.getCurPath())) {
path = "";
values.add("\"type\"=\"" + parser.getCurPath().substring(1) + "\"");
} else {
if (s != null && !s.trim().equals("")) {
values.add("\"" + path + "\"=\"" + s + "\"");
}
}
List<Attribute> attributes = element.getAttributes();
for (Attribute attribute : attributes) {
if (attribute.getValue() != null && !attribute.getValue().trim().equals("")) {
String value = attribute.getValue();
String namespace = attribute.getNamespace();
String localName = attribute.getLocalName();
if (namespace != null && Constants.NS_EXTERNAL_XLINK.equals(namespace)) {
if (attribute.getLocalName().equals("href")) {
localName = "id";
value = value.replaceFirst(".*/", "");
if (path.equals("")) {
value = value.replaceFirst("(.*?:.*?):.*", "$1");
}
if (!value.contains(":")) {
value = "";
}
} else {
value = "";
}
}
if (!value.equals("")) {
values.add("\"" + path + "/" + localName + "\"=\"" + value + "\"");
}
}
}
return s;
}
@Override
public StartElement startElement(final StartElement element) throws XMLStreamException {
final String curPath = parser.getCurPath();
if (this.inside) {
this.deepLevel++;
writeElement(element);
final int attCount = element.getAttributeCount();
for (int i = 0; i < attCount; i++) {
final Attribute curAtt = element.getAttribute(i);
writeAttribute(
curAtt.getNamespace(),
element.getLocalName(),
curAtt.getLocalName(),
curAtt.getValue(),
curAtt.getPrefix());
}
} else {
if (curPath.endsWith("components/component")) {
final int indexObjid = element.indexOfAttribute(null, "objid");
final int indexHref = element.indexOfAttribute(Constants.XLINK_NS_URI, "href");
if (!(indexObjid > -1 && element.getAttribute(indexObjid).getValue().length() > 0
|| indexHref > -1
&& Utility.getId(element.getAttribute(indexHref).getValue()).length() > 0)) {
// start new component if there is no ID
final ByteArrayOutputStream out = new ByteArrayOutputStream();
this.writer = XmlUtility.createXmlStreamWriter(out);
outputStreams.add(out);
this.inside = true;
this.deepLevel++;
writeElement(element);
final int attCount = element.getAttributeCount();
for (int i = 0; i < attCount; i++) {
final Attribute curAtt = element.getAttribute(i);
writeAttribute(
curAtt.getNamespace(),
element.getLocalName(),
curAtt.getLocalName(),
curAtt.getValue(),
curAtt.getPrefix());
}
}
}
}
return element;
}
@Override
public EndElement endElement(final EndElement element) throws XMLStreamException {
final String curPath = parser.getCurPath();
if (this.inside) {
writer.writeEndElement();
this.deepLevel--;
final String ns = element.getNamespace();
List nsTrace = nsuris.get(ns);
if (nsTrace != null
&& (nsTrace.get(2) == null || nsTrace.get(2).equals(element.getPrefix()))
&& nsTrace.get(1).equals(element.getLocalName())
&& (Integer) nsTrace.get(0) == this.deepLevel + 1) {
nsuris.remove(ns);
}
// attribute namespaces
// TODO iteration is a hack, use
// javax.xml.namespace.NamespaceContext
Iterator<String> it = nsuris.keySet().iterator();
final Collection<String> toRemove = new ArrayList<String>();
while (it.hasNext()) {
final String key = it.next();
nsTrace = nsuris.get(key);
if ((Integer) nsTrace.get(0) == this.deepLevel + 1) {
toRemove.add(key);
}
}
it = toRemove.iterator();
while (it.hasNext()) {
final String key = it.next();
nsuris.remove(key);
}
if (curPath.endsWith("components/component")) {
this.inside = false;
writer.flush();
writer.close();
}
}
return element;
}
@Override
public StartElement startElement(final StartElement element)
throws TripleStoreSystemException, WebserverSystemException, InvalidContentException {
final String curPath = parser.getCurPath();
if (curPath.startsWith(this.componentPath) && curPath.equals(this.componentPath)) {
// do my job
// save componentId
final int indexObjid = element.indexOfAttribute(null, "objid");
final int indexHref = element.indexOfAttribute(Constants.XLINK_NS_URI, "href");
if (indexObjid >= 0 || indexHref >= 0) {
final String componentId =
indexObjid >= 0
? element.getAttribute(indexObjid).getValue()
: Utility.getId(element.getAttribute(indexHref).getValue());
if (componentId.length() > 0) {
// check if component exists
boolean componentExists = false;
final List<String> existingComponents =
TripleStoreUtility.getInstance().getComponents(this.itemId);
for (final String existingComponent : existingComponents) {
if (existingComponent.equals(componentId)) {
componentExists = true;
break;
}
}
if (!componentExists) {
throw new InvalidContentException(
"Component with id "
+ componentId
+ " does not exist in item "
+ this.itemId
+ '.');
}
}
}
}
return element;
}
/**
* Parser hits an XML end element.
*
* @param element StAX EndElement
* @return StAX EndElement
*/
@Override
public EndElement endElement(final EndElement element) throws WebserverSystemException {
final String currentPath = parser.getCurPath();
if (xpathContentStream.equals(currentPath)) {
this.parsingContent = false;
if (this.hasContent) {
final Map<String, Object> outputStreams = this.contentHandler.getOutputStreams();
// MultipleExtractor could deliver a list of stream. But it
// should be only possible to extract one with this parser
// chain.
if (outputStreams.size() > 1) {
LOGGER.warn("Multiple content-streams.");
}
final Iterator<String> it = outputStreams.keySet().iterator();
final ByteArrayOutputStream outStream =
(ByteArrayOutputStream) outputStreams.get(it.next());
try {
this.content.setContent(outStream.toString(XmlUtility.CHARACTER_ENCODING));
} catch (final UnsupportedEncodingException e) {
throw new WebserverSystemException("Application default encoding not supported.", e);
}
this.hasContent = false;
this.contentHandler = null;
}
this.contentStream.setContent(this.content);
} else {
if (this.parsingContent && this.hasContent) {
this.contentHandler.endElement(element);
}
}
return element;
}
/**
* Parser hits an XML start element.
*
* @param element StartElement from StAX parser
* @return StAX StartElement
*/
@Override
public StartElement startElement(final StartElement element)
throws InvalidContentException, MissingAttributeValueException, WebserverSystemException {
if (this.parsingContent) {
if (this.contentHandler == null) {
// reached first element after content-stream root element
this.contentHandler =
new MultipleExtractor(
this.xpathContentStream + '/' + element.getLocalName(), this.parser);
}
this.hasContent = true;
this.contentHandler.startElement(element);
} else {
final String currentPath = parser.getCurPath();
if (currentPath.equals(this.xpathContentStream)) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Parser reached " + currentPath);
}
this.parsingContent = true;
this.contentStream = new ContentStreamCreate();
this.contentStream.setName(getAttributeValue(element, null, "name"));
this.contentStream.setMimeType(getAttributeValue(element, null, "mime-type"));
// this seams strange (title is a href attribute which should
// be ignored)
this.contentStream.setTitle(getAttributeValue(element, Constants.XLINK_NS_URI, "title"));
this.content = new BinaryContent();
this.content.setStorageType(getAttributeValue(element, null, "storage"));
this.content.setDataLocation(getAttributeValue(element, Constants.XLINK_NS_URI, "href"));
}
}
return element;
}
/**
* Retrieve the properties of the last version (RELS-EXT) and inject values into
* ContentRelationCreate object.
*
* @param cr ContentRelation object
* @throws SystemException Thrown in case of internal failure.
* @throws ContentRelationNotFoundException Thrown if resource with provided id could not be found
* in Fedora repository.
*/
private static void setRelsExtValues(final ContentRelationCreate cr)
throws SystemException, ContentRelationNotFoundException {
// retrieve resource with id from Fedora
final Datastream relsExt;
try {
relsExt = new Datastream(Datastream.RELS_EXT_DATASTREAM, cr.getObjid(), null);
} catch (final StreamNotFoundException e) {
throw new ContentRelationNotFoundException(
"Content Relation with id '" + cr.getObjid() + "' could not be found.", e);
}
final StaxParser sp = new StaxParser();
final RelsExtReadHandler eve = new RelsExtReadHandler(sp);
eve.cleanIdentifier(true);
sp.addHandler(eve);
try {
sp.parse(relsExt.getStream());
} catch (final Exception e) {
throw new WebserverSystemException(e);
}
final List<Triple> triples = eve.getElementValues().getTriples();
// write triple values into ContentRelation object
for (final Triple triple : triples) {
if (triple.getPredicate().equals(TripleStoreUtility.PROP_FRAMEWORK_BUILD)) {
cr.setBuildNumber(triple.getObject());
}
// creator --------------
else if (triple.getPredicate().equals(TripleStoreUtility.PROP_CREATED_BY_ID)) {
cr.getProperties().setCreatedById(triple.getObject());
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_CREATED_BY_TITLE)) {
cr.getProperties().setCreatedByName(triple.getObject());
}
// modifier --------------
else if (triple.getPredicate().equals(TripleStoreUtility.PROP_MODIFIED_BY_ID)) {
cr.getProperties().setModifiedById(triple.getObject());
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_MODIFIED_BY_TITLE)) {
cr.getProperties().setModifiedByName(triple.getObject());
}
// public-status --------------
else if (triple.getPredicate().equals(TripleStoreUtility.PROP_PUBLIC_STATUS)) {
final StatusType st;
try {
st = StatusType.getStatusType(triple.getObject());
} catch (final InvalidStatusException e) {
// shouldn't happen
throw new SystemException(e);
}
cr.getProperties().setStatus(st);
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_PUBLIC_STATUS_COMMENT)) {
cr.getProperties().setStatusComment(triple.getObject());
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_OBJECT_TYPE)) {
// this is not the ContentRelation type, this is the type of
// resource
if (!(Constants.CONTENT_RELATION2_OBJECT_TYPE.equals(triple.getObject())
|| (Constants.RDF_NAMESPACE_URI + "Statement").equals(triple.getObject()))) {
throw new WebserverSystemException("Resource is not from type ContentRelation.");
}
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_CONTENT_RELATION_SUBJECT)) {
cr.setSubject(triple.getObject());
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_CONTENT_RELATION_OBJECT)) {
cr.setObject(triple.getObject());
} else if (triple
.getPredicate()
.equals(TripleStoreUtility.PROP_CONTENT_RELATION_DESCRIPTION)) {
cr.getProperties().setDescription(triple.getObject());
} else if (triple.getPredicate().equals(TripleStoreUtility.PROP_CONTENT_RELATION_TYPE)) {
try {
cr.setType(new URI(triple.getObject()));
} catch (final URISyntaxException e) {
// shouldn't happen
throw new SystemException("Stored value for URI in invalid.", e);
}
} else if (triple
.getPredicate()
.equals(TripleStoreUtility.PROP_CONTENT_RELATION_OBJECT_VERSION)) {
cr.setObjectVersion(triple.getObject());
} else {
// add values for mapping
LOGGER.warn("Predicate not mapped " + triple.getPredicate() + " = " + triple.getObject());
}
}
}
@Override
public StartElement startElement(final StartElement element) throws XMLStreamException {
final String elementName = element.getLocalName();
if ("component".equals(elementName)) {
this.inComponent = true;
if (this.pids != null) {
this.componentId = pids.get(this.number);
this.number++;
} else {
final int index = element.indexOfAttribute(null, "objid");
if (index != -1) {
final String value = element.getAttribute(index).getValue();
if (value != null && value.length() > 0) {
this.componentId = value;
}
}
}
}
if (!this.inside) {
final String currentPath = parser.getCurPath();
if (paths.containsKey(currentPath)) {
if (this.insideLevel != 0) {
throw new XMLStreamException("insideLevel != 0: " + this.insideLevel);
}
this.inside = true;
final ByteArrayOutputStream out = new ByteArrayOutputStream();
this.writer = newInitializedWriter(out);
final String attributeName = paths.get(currentPath);
if (this.inComponent) {
if (this.components == null) {
this.components = new HashMap<String, Map>();
outputStreams.put("components", this.components);
}
final Map<String, Object> component;
if (components.containsKey(this.componentId)) {
component = (HashMap) components.get(this.componentId);
} else {
component = new HashMap<String, Object>();
components.put(this.componentId, component);
}
if (attributeName == null) {
component.put(elementName, out);
} else {
final String attributeValue = getAttributeValue(element, null, attributeName);
if ("md-record".equals(elementName)) {
Map<String, OutputStream> mdRecords = components.get(this.components);
if (mdRecords == null) {
mdRecords = new HashMap<String, OutputStream>();
component.put("md-records", mdRecords);
}
mdRecords.put(attributeValue, out);
} else {
component.put(attributeValue, out);
}
}
} else {
if (attributeName == null) {
outputStreams.put(elementName, out);
} else {
final String attributeValue = getAttributeValue(element, null, attributeName);
if ("md-record".equals(elementName)) {
if (this.metadata == null) {
this.metadata = new HashMap<String, OutputStream>();
outputStreams.put("md-records", this.metadata);
}
metadata.put(attributeValue, out);
} else {
outputStreams.put(attributeValue, out);
}
}
}
}
}
// write start element with attributes (and implicit neccessary
// namespace declarations due to the repairing xml writer
if (this.inside) {
String namespace = element.getNamespace();
if (namespace != null && !namespaceMap.containsKey(namespace)) {
final String prefix = element.getPrefix();
if (prefix != null) {
writer.setPrefix(prefix, element.getNamespace());
} else {
writer.setDefaultNamespace(element.getNamespace());
}
}
if (!("md-record".equals(elementName) && paths.containsKey(parser.getCurPath()))) {
writer.writeStartElement(element.getNamespace(), elementName);
}
final int attCount = element.getAttributeCount();
for (int i = 0; i < attCount; i++) {
final Attribute curAtt = element.getAttribute(i);
namespace = curAtt.getNamespace();
if (namespace != null && !namespaceMap.containsKey(namespace)) {
// Prefix is not null. (FRS)
writer.setPrefix(curAtt.getPrefix(), namespace);
}
if (!("md-record".equals(elementName) && paths.containsKey(parser.getCurPath()))) {
writer.writeAttribute(namespace, curAtt.getLocalName(), curAtt.getValue());
}
}
this.insideLevel++;
}
// this has to be the last handler
return element;
}
