private void getNestedValues(
NestedAttributeMapping mapping, List<Feature> features, List<Object> values, int nextIndex) {
FeatureTypeMapping nextFMapping = null;
for (Feature f : features) {
try {
nextFMapping = mapping.getFeatureTypeMapping(f);
} catch (IOException e) {
nextFMapping = null;
}
if (nextFMapping != null && mapping.isSameSource()) {
// same root/database row, different mappings, used in
// polymorphism
List<Feature> nestedRoots = new ArrayList<Feature>(1);
nestedRoots.add(f);
List<Object> nestedValues =
getValues(nextIndex, nextIndex, nestedRoots, nextFMapping, mapping);
if (nestedValues != null) {
values.addAll(nestedValues);
}
continue;
}
try {
List<Feature> nestedFeatures = getNestedFeatures(f, mapping, nextFMapping);
if (nestedFeatures == null || nestedFeatures.isEmpty()) {
continue;
}
if (nextFMapping != null) {
List<Object> nestedValues =
getValues(nextIndex, nextIndex, nestedFeatures, nextFMapping, mapping);
if (nestedValues != null) {
values.addAll(nestedValues);
}
} else if (!nestedFeatures.isEmpty()) {
throw new UnsupportedOperationException(
"FeatureTypeMapping not found for "
+ attPath
+ ". This shouldn't happen if it's set in AppSchemaDataAccess mapping file!");
}
} catch (IOException e) {
throw new RuntimeException(
"Failed evaluating filter expression: '" + attPath + "'. Caused by: " + e.getMessage());
} catch (IllegalArgumentException e) {
// might be a polymorphic case where it's looking for an attribute
// from another type
// that doesn't match this, but might match another database row
// so just continue
continue;
}
}
}
private void getNestedClientProperties(
NestedAttributeMapping mapping,
List<Feature> features,
List<Object> values,
boolean isXlinkHref) {
FeatureTypeMapping nextFMapping = null;
for (Feature f : features) {
try {
nextFMapping = mapping.getFeatureTypeMapping(f);
if (nextFMapping != null) {
List<Feature> nestedFeatures;
nestedFeatures = getNestedFeatures(f, mapping, nextFMapping);
if (nestedFeatures == null || nestedFeatures.isEmpty()) {
continue;
}
if (isXlinkHref) {
// xlink:href mapping done in the root mapping file
// there is no need to find attributeMapping in the nested feature type mapping
getClientProperties(mapping, values, nestedFeatures);
} else {
List<AttributeMapping> nestedAttMappings =
nextFMapping.getAttributeMappingsIgnoreIndex(mapping.getTargetXPath());
AttributeMapping attMapping = null;
boolean found = false;
if (!nestedAttMappings.isEmpty()) {
attMapping = nestedAttMappings.get(0);
found = getClientProperties(attMapping, values, nestedFeatures);
}
if (!found && getLastStep().isId()) {
setIdValues(attMapping, nestedFeatures, values);
}
}
}
} catch (IOException e) {
throw new RuntimeException(
"Failed evaluating filter expression: '" + attPath + "'. Caused by: " + e.getMessage());
} catch (IllegalArgumentException e) {
// might be a polymorphic case where it's looking for an attribute
// from another type
// that doesn't match this, but might match another database row
// so just continue
continue;
}
}
}
/**
* Get nested features from a feature chaining attribute mapping
*
* @param root Root feature being evaluated
* @param nestedMapping Attribute mapping for nested features
* @param fMapping The root feature type mapping
* @return list of nested features
* @throws IOException
*/
private List<Feature> getNestedFeatures(
Feature root, NestedAttributeMapping nestedMapping, FeatureTypeMapping fMapping)
throws IOException {
Object fTypeName = nestedMapping.getNestedFeatureType(root);
if (fTypeName == null || !(fTypeName instanceof Name)) {
return null;
}
boolean hasSimpleFeatures = AppSchemaDataAccessRegistry.hasName((Name) fTypeName);
// get foreign key
Object val = getValue(nestedMapping.getSourceExpression(), root);
if (val == null) {
return null;
}
if (hasSimpleFeatures) {
// normal app-schema mapping
return nestedMapping.getInputFeatures(val, fMapping);
} else {
// app-schema with a complex feature source
return nestedMapping.getFeatures(val, null, root);
}
}