/**
* Translates a feature pointed by a node from its original feature type to a given one, using
* values from those attributes that exist in both original and destination feature type. New
* attributes are populated with null values
*
* @param node The node that points to the feature. No checking is performed to ensure the node
* points to a feature instead of other type
* @param featureType the destination feature type
* @return a feature with the passed feature type and data taken from the input feature
*/
private Feature alter(NodeRef node, RevFeatureType featureType) {
RevFeature oldFeature =
command(RevObjectParse.class).setObjectId(node.objectId()).call(RevFeature.class).get();
RevFeatureType oldFeatureType;
oldFeatureType =
command(RevObjectParse.class)
.setObjectId(node.getMetadataId())
.call(RevFeatureType.class)
.get();
ImmutableList<PropertyDescriptor> oldAttributes = oldFeatureType.sortedDescriptors();
ImmutableList<PropertyDescriptor> newAttributes = featureType.sortedDescriptors();
ImmutableList<Optional<Object>> oldValues = oldFeature.getValues();
List<Optional<Object>> newValues = Lists.newArrayList();
for (int i = 0; i < newAttributes.size(); i++) {
int idx = oldAttributes.indexOf(newAttributes.get(i));
if (idx != -1) {
Optional<Object> oldValue = oldValues.get(idx);
newValues.add(oldValue);
} else {
newValues.add(Optional.absent());
}
}
RevFeature newFeature = RevFeature.build(ImmutableList.copyOf(newValues));
FeatureBuilder featureBuilder = new FeatureBuilder(featureType);
Feature feature = featureBuilder.build(node.name(), newFeature);
return feature;
}
/**
* Tests equality over another {@code NodeRef} based on {@link #getParentPath() parent path},
* {@link #getNode() node} name and id, and {@link #getMetadataId()}
*/
@Override
public boolean equals(Object o) {
if (!(o instanceof NodeRef)) {
return false;
}
NodeRef r = (NodeRef) o;
return parentPath.equals(r.parentPath)
&& node.equals(r.node)
&& getMetadataId().equals(r.getMetadataId());
}