/**
* INTERNAL: Return the value of the field from the row or a value holder on the query to obtain
* the object. Check for batch + aggregation reading.
*/
@Override
public Object valueFromRow(
AbstractRecord row,
JoinedAttributeManager joinManager,
ObjectBuildingQuery sourceQuery,
AbstractSession executionSession)
throws DatabaseException {
// If any field in the foreign key is null then it means there are no referenced objects
for (Enumeration enumeration = getFields().elements(); enumeration.hasMoreElements(); ) {
DatabaseField field = (DatabaseField) enumeration.nextElement();
if (row.get(field) == null) {
return getIndirectionPolicy().nullValueFromRow();
}
}
if (getTypeField() != null) {
// If the query used batched reading, return a special value holder,
// or retrieve the object from the query property.
if (sourceQuery.isReadAllQuery()
&& (((ReadAllQuery) sourceQuery).isAttributeBatchRead(getDescriptor(), getAttributeName())
|| shouldUseBatchReading())) {
return batchedValueFromRow(row, ((ReadAllQuery) sourceQuery));
}
// If the field is empty we cannot load the object because we do not know what class it will
// be
if (row.get(getTypeField()) == null) {
return getIndirectionPolicy().nullValueFromRow();
}
Class implementerClass =
(Class) getImplementorForType(row.get(getTypeField()), executionSession);
ReadObjectQuery query = (ReadObjectQuery) getSelectionQuery().clone();
query.setReferenceClass(implementerClass);
query.setSelectionCriteria(getSelectionCriteria());
query.setDescriptor(null); // Must set to null so the right descriptor is used
if (sourceQuery.isObjectLevelReadQuery()
&& (sourceQuery.shouldCascadeAllParts()
|| (sourceQuery.shouldCascadePrivateParts() && isPrivateOwned())
|| (sourceQuery.shouldCascadeByMapping() && this.cascadeRefresh))) {
query.setShouldRefreshIdentityMapResult(sourceQuery.shouldRefreshIdentityMapResult());
query.setCascadePolicy(sourceQuery.getCascadePolicy());
query.setShouldMaintainCache(sourceQuery.shouldMaintainCache());
// For flashback.
if (((ObjectLevelReadQuery) sourceQuery).hasAsOfClause()) {
query.setAsOfClause(((ObjectLevelReadQuery) sourceQuery).getAsOfClause());
}
// CR #4365 - used to prevent infinit recursion on refresh object cascade all
query.setQueryId(sourceQuery.getQueryId());
}
return getIndirectionPolicy().valueFromQuery(query, row, executionSession);
} else {
return super.valueFromRow(row, joinManager, sourceQuery, executionSession);
}
}
/**
* INTERNAL: Extract the primary key values from the row, then create an
* org.eclipse.persistence.internal.oxm.Reference instance and stored it on the session's
* org.eclipse.persistence.internal.oxm.ReferenceResolver.
*/
public Object readFromRowIntoObject(
AbstractRecord databaseRow,
JoinedAttributeManager joinManager,
Object targetObject,
ObjectBuildingQuery sourceQuery,
AbstractSession executionSession)
throws DatabaseException {
ClassDescriptor descriptor = sourceQuery.getSession().getClassDescriptor(getReferenceClass());
ContainerPolicy cp = this.getContainerPolicy();
Vector pkFieldNames = referenceDescriptor.getPrimaryKeyFieldNames();
Vector primaryKeyValues = new Vector();
primaryKeyValues.setSize(pkFieldNames.size());
HashMap primaryKeyMap = new HashMap();
// for each source xmlField, get the value from the row and store
for (Iterator fieldIt = getFields().iterator(); fieldIt.hasNext(); ) {
XMLField fld = (XMLField) fieldIt.next();
XMLField tgtFld = (XMLField) getSourceToTargetKeyFieldAssociations().get(fld);
Object fieldValue = databaseRow.getValues(fld);
if ((fieldValue == null)
|| (fieldValue instanceof String)
|| !(fieldValue instanceof Vector)) {
return cp.containerInstance();
}
// fix for bug# 5687430
// need to get the actual type of the target (i.e. int, String, etc.)
// and use the converted value when checking the cache.
XMLConversionManager xmlConversionManager =
(XMLConversionManager) executionSession.getDatasourcePlatform().getConversionManager();
Vector newValues = new Vector();
for (Iterator valIt = ((Vector) fieldValue).iterator(); valIt.hasNext(); ) {
for (StringTokenizer stok = new StringTokenizer((String) valIt.next());
stok.hasMoreTokens(); ) {
Object value =
xmlConversionManager.convertObject(
stok.nextToken(), descriptor.getTypedField(tgtFld).getType());
if (value != null) {
newValues.add(value);
}
}
}
primaryKeyMap.put(tgtFld.getXPath(), newValues);
}
// store the Reference instance on the resolver for use during mapping resolution phase
ReferenceResolver resolver = ReferenceResolver.getInstance(sourceQuery.getSession());
if (resolver != null) {
resolver.addReference(new Reference(this, targetObject, referenceClass, primaryKeyMap));
}
return null;
}
@Override
protected Object buildCompositeObject(
ClassDescriptor descriptor,
AbstractRecord nestedRow,
ObjectBuildingQuery query,
CacheKey parentCacheKey,
JoinedAttributeManager joinManager,
AbstractSession targetSession) {
Object element = descriptor.getObjectBuilder().buildNewInstance();
descriptor
.getObjectBuilder()
.buildAttributesIntoObject(
element,
parentCacheKey,
nestedRow,
query,
joinManager,
query.getExecutionFetchGroup(descriptor),
false,
targetSession);
return element;
}
/**
* INTERNAL: Return the value of the reference attribute or a value holder. Check whether the
* mapping's attribute should be optimized through batch and joining.
*/
public Object valueFromRow(
AbstractRecord row,
JoinedAttributeManager joinManager,
ObjectBuildingQuery sourceQuery,
AbstractSession executionSession)
throws DatabaseException {
if (((EISDescriptor) this.getDescriptor()).getDataFormat() == EISDescriptor.XML) {
((XMLRecord) row).setSession(executionSession);
}
ReadQuery targetQuery = getSelectionQuery();
if (!isForeignKeyRelationship) {
// if the source query is cascading then the target query must use the same settings
if (targetQuery.isObjectLevelReadQuery()
&& (sourceQuery.shouldCascadeAllParts()
|| (sourceQuery.shouldCascadePrivateParts() && isPrivateOwned())
|| (sourceQuery.shouldCascadeByMapping() && this.cascadeRefresh))) {
targetQuery = (ObjectLevelReadQuery) targetQuery.clone();
((ObjectLevelReadQuery) targetQuery)
.setShouldRefreshIdentityMapResult(sourceQuery.shouldRefreshIdentityMapResult());
targetQuery.setCascadePolicy(sourceQuery.getCascadePolicy());
// CR #4365
targetQuery.setQueryId(sourceQuery.getQueryId());
// For queries that have turned caching off, such as aggregate collection, leave it off.
if (targetQuery.shouldMaintainCache()) {
targetQuery.setShouldMaintainCache(sourceQuery.shouldMaintainCache());
}
}
return getIndirectionPolicy().valueFromQuery(targetQuery, row, sourceQuery.getSession());
} else {
if (getIndirectionPolicy().usesIndirection()) {
EISOneToManyQueryBasedValueHolder valueholder =
new EISOneToManyQueryBasedValueHolder(this, targetQuery, row, sourceQuery.getSession());
return valueholder;
} else {
Vector subRows = getForeignKeyRows(row);
if (subRows == null) {
return null;
}
ContainerPolicy cp = this.getContainerPolicy();
Object results = cp.containerInstance(subRows.size());
for (int i = 0; i < subRows.size(); i++) {
XMLRecord subRow = (XMLRecord) subRows.elementAt(i);
subRow.setSession(executionSession);
Object object =
getIndirectionPolicy().valueFromQuery(targetQuery, subRow, sourceQuery.getSession());
if (object instanceof Collection) {
java.util.Iterator iter = ((Collection) object).iterator();
while (iter.hasNext()) {
cp.addInto(iter.next(), results, executionSession);
}
} else if (object instanceof java.util.Map) {
java.util.Iterator iter = ((java.util.Map) object).values().iterator();
while (iter.hasNext()) {
cp.addInto(iter.next(), results, executionSession);
}
} else {
cp.addInto(object, results, executionSession);
}
}
if (cp.sizeFor(results) == 0) {
return null;
}
return results;
}
}
}
public Object valueFromRow(
AbstractRecord row,
JoinedAttributeManager joinManager,
ObjectBuildingQuery sourceQuery,
CacheKey cacheKey,
AbstractSession executionSession,
boolean isTargetProtected,
Boolean[] wasCacheUsed)
throws DatabaseException {
ContainerPolicy cp = this.getContainerPolicy();
Object fieldValue = row.getValues(this.getField());
// BUG#2667762 there could be whitespace in the row instead of null
if ((fieldValue == null) || (fieldValue instanceof String)) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Vector nestedRows =
this.getDescriptor().buildNestedRowsFromFieldValue(fieldValue, executionSession);
if (nestedRows == null) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Object result = null;
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
result = container != null ? container : cp.containerInstance();
} else {
result = cp.containerInstance(nestedRows.size());
}
for (Enumeration stream = nestedRows.elements(); stream.hasMoreElements(); ) {
XMLRecord nestedRow = (XMLRecord) stream.nextElement();
Object objectToAdd;
if (getNullPolicy().valueIsNull((Element) nestedRow.getDOM())) {
objectToAdd = null;
} else {
objectToAdd =
buildObjectFromNestedRow(
nestedRow, joinManager, sourceQuery, executionSession, isTargetProtected);
}
cp.addInto(objectToAdd, result, sourceQuery.getSession());
if (null != getContainerAccessor()) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
if (this.inverseReferenceMapping.getContainerPolicy() == null) {
getContainerAccessor().setAttributeValueInObject(objectToAdd, currentObject);
} else {
Object backpointerContainer =
getContainerAccessor().getAttributeValueFromObject(objectToAdd);
if (backpointerContainer == null) {
backpointerContainer =
this.inverseReferenceMapping.getContainerPolicy().containerInstance();
getContainerAccessor().setAttributeValueInObject(objectToAdd, backpointerContainer);
}
this.inverseReferenceMapping
.getContainerPolicy()
.addInto(currentObject, backpointerContainer, executionSession);
}
}
}
return result;
}
public Object valueFromRow(
AbstractRecord row,
JoinedAttributeManager joinManager,
ObjectBuildingQuery query,
AbstractSession executionSession) {
ContainerPolicy cp = this.getContainerPolicy();
Object fieldValue = row.getValues(this.getField());
if (fieldValue == null) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Vector fieldValues = this.getDescriptor().buildDirectValuesFromFieldValue(fieldValue);
if (fieldValues == null) {
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
return container != null ? container : cp.containerInstance();
} else {
return cp.containerInstance();
}
}
Object result = null;
if (reuseContainer) {
Object currentObject = ((XMLRecord) row).getCurrentObject();
Object container = getAttributeAccessor().getAttributeValueFromObject(currentObject);
result = container != null ? container : cp.containerInstance();
} else {
result = cp.containerInstance(fieldValues.size());
}
for (Enumeration stream = fieldValues.elements(); stream.hasMoreElements(); ) {
Object element = stream.nextElement();
// PERF: Direct variable access.
// Object value = row.get(field);
// Object fieldValue = null;
XMLUnmarshaller unmarshaller = ((XMLRecord) row).getUnmarshaller();
if (element instanceof String) {
if (this.isSwaRef() && (unmarshaller.getAttachmentUnmarshaller() != null)) {
fieldValue =
unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler((String) element);
} else if (!this.isSwaRef()) {
// should be base64
byte[] bytes =
((XMLConversionManager)
executionSession.getDatasourcePlatform().getConversionManager())
.convertSchemaBase64ToByteArray(element);
fieldValue = bytes;
}
} else {
// this was an element, so do the XOP/SWAREF/Inline binary cases for an element
XMLRecord record = (XMLRecord) element;
record.setSession(executionSession);
if ((unmarshaller.getAttachmentUnmarshaller() != null)
&& unmarshaller.getAttachmentUnmarshaller().isXOPPackage()
&& !this.isSwaRef()
&& !this.shouldInlineBinaryData()) {
// look for the include element:
String xpath = XMLConstants.EMPTY_STRING;
// need a prefix for XOP
String prefix = null;
NamespaceResolver descriptorResolver =
((XMLDescriptor) getDescriptor()).getNamespaceResolver();
if (descriptorResolver != null) {
prefix = descriptorResolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX;
}
NamespaceResolver tempResolver = new NamespaceResolver();
tempResolver.put(prefix, XMLConstants.XOP_URL);
xpath = prefix + XMLConstants.COLON + INCLUDE + "/@href";
XMLField field = new XMLField(xpath);
field.setNamespaceResolver(tempResolver);
String includeValue = (String) record.get(field);
if (element != null && includeValue != null) {
if ((getAttributeElementClass() == ClassConstants.ABYTE)
|| (getAttributeElementClass() == ClassConstants.APBYTE)) {
fieldValue =
unmarshaller.getAttachmentUnmarshaller().getAttachmentAsByteArray(includeValue);
} else {
fieldValue =
unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler(includeValue);
}
} else {
// If we didn't find the Include element, check for inline
fieldValue = record.get(XMLConstants.TEXT);
// should be a base64 string
fieldValue =
((XMLConversionManager)
executionSession.getDatasourcePlatform().getConversionManager())
.convertSchemaBase64ToByteArray(fieldValue);
}
} else if ((unmarshaller.getAttachmentUnmarshaller() != null) && isSwaRef()) {
String refValue = (String) record.get(XMLConstants.TEXT);
if (refValue != null) {
fieldValue =
unmarshaller.getAttachmentUnmarshaller().getAttachmentAsDataHandler(refValue);
}
} else {
fieldValue = record.get(XMLConstants.TEXT);
// should be a base64 string
fieldValue =
((XMLConversionManager)
executionSession.getDatasourcePlatform().getConversionManager())
.convertSchemaBase64ToByteArray(fieldValue);
}
}
Object attributeValue = fieldValue;
if (getValueConverter() != null) {
if (getValueConverter() instanceof XMLConverter) {
attributeValue =
((XMLConverter) getValueConverter())
.convertDataValueToObjectValue(fieldValue, executionSession, unmarshaller);
} else {
attributeValue =
getValueConverter().convertDataValueToObjectValue(fieldValue, executionSession);
}
}
cp.addInto(attributeValue, result, query.getSession());
}
return result;
}
