com.nedap.archie.flattener.CAttributeFlattener Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of tools Show documentation
Show all versions of tools Show documentation
tools that operate on the archie reference models and archetype object model
package com.nedap.archie.flattener;
import com.nedap.archie.aom.*;
import com.nedap.archie.aom.utils.AOMUtils;
import com.nedap.archie.base.MultiplicityInterval;
import com.nedap.archie.paths.PathSegment;
import com.nedap.archie.paths.PathUtil;
import com.nedap.archie.query.AOMPathQuery;
import com.nedap.archie.query.APathQuery;
import com.nedap.archie.query.ComplexObjectProxyReplacement;
import com.nedap.archie.rminfo.RMAttributeInfo;
import java.util.ArrayList;
import java.util.List;
/**
* Flattens attributes, taking sibling order into account.
*/
public class CAttributeFlattener {
private final IAttributeFlattenerSupport flattener;
public CAttributeFlattener(IAttributeFlattenerSupport flattener) {
this.flattener = flattener;
}
public void flattenSingleAttribute(CComplexObject newObject, CAttribute attribute) {
if(attribute.getDifferentialPath() != null) {
//this overrides a specific path
ArchetypeModelObject object = new AOMPathQuery(attribute.getDifferentialPath()).dontFindThroughCComplexObjectProxies().find(newObject);
if(object == null) {
//it is possible that the object points to a reference, in which case we need to clone the referenced node, then try again
//AOM spec paragraph 7.2: 'proxy reference targets are expanded inline if the child archetype overrides them.'
//also examples in ADL2 spec about internal references
//so find the internal references here!
//TODO: AOMUtils.pathAtSpecializationLevel(pathSegments.subList(0, pathSegments.size()-1), flatParent.specializationDepth());
CComplexObjectProxy internalReference = new AOMPathQuery(attribute.getDifferentialPath()).findAnyInternalReference(newObject);
if(internalReference != null) {
//in theory this can be a use node within a use node.
ComplexObjectProxyReplacement complexObjectProxyReplacement =
ComplexObjectProxyReplacement.getComplexObjectProxyReplacement(internalReference);
if(complexObjectProxyReplacement != null) {
complexObjectProxyReplacement.replace();
//and again!
flattenSingleAttribute(newObject, attribute);
} else {
throw new RuntimeException("cannot find target in CComplexObjectProxy");
}
} else {
//lookup the parent and try to add the last attribute if it does not exist
List pathSegments = new APathQuery(attribute.getDifferentialPath()).getPathSegments();
String pathMinusLastNode = PathUtil.getPath(pathSegments.subList(0, pathSegments.size()-1));
CObject parentObject = newObject.itemAtPath(pathMinusLastNode);
if(parentObject != null && parentObject instanceof CComplexObject) {
//attribute does not exist, but does exist in RM (or it would not have passed the ArchetypeValidator, or the person using
//this flattener does not care
CAttribute realAttribute = new CAttribute(pathSegments.get(pathSegments.size()-1).getNodeName());
((CComplexObject) parentObject).addAttribute(realAttribute);
flattenAttribute(newObject, realAttribute, attribute);
}
}
}
else if(object instanceof CAttribute) {
CAttribute realAttribute = (CAttribute) object;
flattenAttribute(newObject, realAttribute, attribute);
} else if (object instanceof CObject) {
//TODO: what does this mean?
}
} else {
//this overrides the same path
flattenAttribute(newObject, newObject.getAttribute(attribute.getRmAttributeName()), attribute);
}
}
public CAttribute flattenAttribute(CComplexObject root, CAttribute attributeInParent, CAttribute attributeInSpecialization) {
if(attributeInParent == null) {
CAttribute childCloned = attributeInSpecialization.clone();
root.addAttribute(childCloned);
return childCloned;
} else {
attributeInParent.setExistence(FlattenerUtil.getPossiblyOverridenValue(attributeInParent.getExistence(), attributeInSpecialization.getExistence()));
attributeInParent.setCardinality(FlattenerUtil.getPossiblyOverridenValue(attributeInParent.getCardinality(), attributeInSpecialization.getCardinality()));
if (attributeInSpecialization.getChildren().size() > 0 && attributeInSpecialization.getChildren().get(0) instanceof CPrimitiveObject) {
//in case of a primitive object, just replace all nodes
attributeInParent.setChildren(attributeInSpecialization.getChildren());
} else {
//ordering the children correctly is tricky.
// First reorder parentCObjects if necessary, in the case that a sibling order refers to a redefined node
// in the attributeInSpecialization archetype
reorderSiblingOrdersReferringToSameLevel(attributeInSpecialization);
//Now maintain an insertion anchor
//for when a sibling node has been set somewhere.
// insert everything after/before the anchor if it is set,
// at the defined position from the spec if it is null
SiblingOrder anchor = null;
List parentCObjects = attributeInParent.getChildren();
for (CObject specializedChildCObject : attributeInSpecialization.getChildren()) {
//find matching attributeInParent and create the child node with it
CObject matchingParentObject = findMatchingParentCObject(specializedChildCObject, parentCObjects);
if(specializedChildCObject.getSiblingOrder() != null) {
//new sibling order, update the anchor
anchor = specializedChildCObject.getSiblingOrder();
}
if (anchor != null) {
mergeObjectIntoAttribute(attributeInParent, specializedChildCObject, matchingParentObject, attributeInSpecialization.getChildren(), anchor);
anchor = nextAnchor(anchor, specializedChildCObject);
} else { //no sibling order, apply default rules
//add to end
CObject specializedObject = flattener.createSpecializeCObject(attributeInParent, matchingParentObject, specializedChildCObject);
if(matchingParentObject == null) {
//extension nodes should be added to the last position
attributeInParent.addChild(specializedObject);
} else {
attributeInParent.addChild(specializedObject, SiblingOrder.createAfter(findLastSpecializedChildDirectlyAfter(attributeInParent, matchingParentObject)));
if(shouldRemoveParent(specializedChildCObject, matchingParentObject, attributeInSpecialization.getChildren())) {
attributeInParent.removeChild(matchingParentObject.getNodeId());
}
}
}
}
}
return attributeInParent;
}
}
/**
* Given the last used siblingorder anchor and the last specialized object added, return the SiblingOrder where the
* next specialized object should be added - if that next object does not have a new sibling order
* @param lastAnchor
* @param lastSpecializedObject
* @return
*/
private SiblingOrder nextAnchor(SiblingOrder lastAnchor, CObject lastSpecializedObject) {
if(lastAnchor.isBefore()) {
return lastAnchor;
} else {
return SiblingOrder.createAfter(lastSpecializedObject.getNodeId());
}
}
/**
* Add the specializedChildObject to the parentAttribute at the given siblingOrder. This method automatically checks if the matchingParentObject should be removed, and removes it if necessary.
*
* @param parentAttribute the attribute to add the new object to
* @param specializedChildCObject the specialized object that should be merged into the parent object
* @param matchingParentObject the matching parent CObject for the given specializedChildObject
* @param allSpecializedChildren all the specialized children in the same container as specialedChildCObject
* @param siblingOrder the sibling order where to add the specializedChild to. Directly adds, no preprocessing or anchor support in this method, you must do that before.
*/
private void mergeObjectIntoAttribute(CAttribute parentAttribute, CObject specializedChildCObject, CObject matchingParentObject, List allSpecializedChildren, SiblingOrder siblingOrder) {
CObject specializedObject = flattener.createSpecializeCObject(parentAttribute, matchingParentObject, specializedChildCObject);
if (shouldRemoveParent(specializedChildCObject, matchingParentObject, allSpecializedChildren)) {
parentAttribute.removeChild(matchingParentObject.getNodeId());
}
parentAttribute.addChild(specializedObject, siblingOrder);
}
/**
* If the following occurs:
*
* after[id3]
* ELEMENT[id2]
* ELEMENT[id3.1]
*
* Reorder it and remove sibling orders:
*
* ELEMENT[id3.1]
* ELEMENT[id2]
*
* If sibling order do not refer to specialized nodes at this level, leaves them alone
* @param parent the attribute to reorder the child nodes for
*/
private void reorderSiblingOrdersReferringToSameLevel(CAttribute parent) {
for(CObject cObject:new ArrayList<>(parent.getChildren())) {
if(cObject.getSiblingOrder() != null) {
String matchingNodeId = findCObjectMatchingSiblingOrder(cObject.getSiblingOrder(), parent.getChildren());
if(matchingNodeId != null) {
parent.removeChild(cObject.getNodeId());
SiblingOrder siblingOrder = new SiblingOrder();
siblingOrder.setSiblingNodeId(matchingNodeId);
siblingOrder.setBefore(cObject.getSiblingOrder().isBefore());
parent.addChild(cObject, siblingOrder);
cObject.setSiblingOrder(null);//unset sibling order, it has been processed already
}
}
}
}
/**
* Find the CObject in the given list of cObjects that matches with the given sibling order
* @param siblingOrder
* @param cObjectList
* @return
*/
private String findCObjectMatchingSiblingOrder(SiblingOrder siblingOrder, List cObjectList) {
for(CObject object:cObjectList) {
if(AOMUtils.isOverriddenIdCode(object.getNodeId(), siblingOrder.getSiblingNodeId())) {
return object.getNodeId();
}
}
return null;
}
/**
* Give an attribute and a CObject that is a child of that attribute, find the node id of the last object that is
* in the list of nodes directly after the child attribute that specialize the matching parent. If the parent
* has not yet been specialized, returns the parent node id
*
* @param parent
* @param matchingParentObject
* @return
*/
private String findLastSpecializedChildDirectlyAfter(CAttribute parent, CObject matchingParentObject) {
int matchingIndex = parent.getIndexOfChildWithNodeId(matchingParentObject.getNodeId());
String result = matchingParentObject.getNodeId();
for(int i = matchingIndex+1; i < parent.getChildren().size(); i++) {
if(AOMUtils.isOverriddenIdCode(parent.getChildren().get(i).getNodeId(), matchingParentObject.getNodeId())) {
result = parent.getChildren().get(i).getNodeId();
}
}
return result;
}
/**
* For the given specialized CObject that is to be added to the archetype, specializing matchingParentObject, and given
* the list of all specialized children of the same container as the given specialized cobject, return if the parent
* should be removed from the resulting list of flattened CObjects after inserting the specialized check or not.
*
*
* @param specializedChildCObject the specialized child object that is to be added
* @param matchingParentObject the CObject that matches with the specializedChildObject. Can be null.
* @param allSpecializedChildren all specialized children under the specializing child container
* @return
*/
private boolean shouldRemoveParent(CObject specializedChildCObject, CObject matchingParentObject, List allSpecializedChildren) {
if(matchingParentObject == null) {
return false;
}
List allMatchingChildren = new ArrayList<>();
for (CObject specializedChild : allSpecializedChildren) {
if (AOMUtils.isOverridenCObject(specializedChild, matchingParentObject)) {
allMatchingChildren.add(specializedChild);
}
}
boolean hasSameNodeIdInMatchingChildren = allMatchingChildren.stream().anyMatch(c -> c.getNodeId().equals(matchingParentObject.getNodeId()));
if(hasSameNodeIdInMatchingChildren) {
//if parent contains id2, and child as well, replace the exact same node with the exact child. Otherwise,
//add children and replace the last child.
return specializedChildCObject.getNodeId().equalsIgnoreCase(matchingParentObject.getNodeId());
} else if(allMatchingChildren.get(allMatchingChildren.size()-1).getNodeId().equalsIgnoreCase(specializedChildCObject.getNodeId())) {
//the last matching child should possibly replace the parent, the rest should just add
//if there is just one child, that's fine, it should still work
return shouldReplaceSpecializedParent(matchingParentObject, allMatchingChildren);
}
return false;
}
private boolean shouldReplaceSpecializedParent(CObject parent, List differentialNodes) {
MultiplicityInterval occurrences = parent.effectiveOccurrences(flattener.getMetaModels()::referenceModelPropMultiplicity);
//isSingle/isMultiple is tricky and not doable just in the parser. Don't use those
if(isSingle(parent.getParent())) {
return true;
} else if(occurrences != null && occurrences.upperIsOne()) {
//REFINE the parent node case 1, the parent has occurrences upper == 1
return true;
} else if (differentialNodes.size() == 1) {
MultiplicityInterval effectiveOccurrences;
//the differentialNode can have a differential path instead of an attribute name. In that case, we need to replace the rm type name
//of the parent with the actual typename in the parent archetype. Otherwise, it may fall back to the default type in the RM,
//and that can be an abstract type that does not have the attribute that we are trying to constrain. For example:
//diff archetype:
// /events[id6]/data/items matches {
//in the rm, data maps to an ITEM_STRUCTURE that does not have the attribute items.
//in the parent archetype, that is then an ITEM_TREE. We need to use ITEM_TREE here, which is what this code accomplishes.
if(parent.getParent() == null || parent.getParent().getParent() == null) {
effectiveOccurrences = differentialNodes.get(0).effectiveOccurrences(flattener.getMetaModels()::referenceModelPropMultiplicity);
} else {
effectiveOccurrences = differentialNodes.get(0).effectiveOccurrences((s, s2) -> flattener.getMetaModels().referenceModelPropMultiplicity(
parent.getParent().getParent().getRmTypeName(), parent.getParent().getRmAttributeName()));
}
if(effectiveOccurrences != null && effectiveOccurrences.upperIsOne()) {
//REFINE the parent node case 2, only one child with occurrences upper == 1
return true;
}
}
return false;
}
private boolean isSingle(CAttribute attribute) {
if(attribute != null && attribute.getParent() != null && attribute.getDifferentialPath() == null) {
return !flattener.getMetaModels().isMultiple(attribute.getParent().getRmTypeName(), attribute.getRmAttributeName());
}
return false;
}
/**
* Find the matching parent CObject given a specialized child. REturns null if not found.
* @param specializedChildCObject
* @param parentCObjects
* @return
*/
private CObject findMatchingParentCObject(CObject specializedChildCObject, List parentCObjects) {
for (CObject parentCObject : parentCObjects) {
if (AOMUtils.isOverridenCObject(specializedChildCObject, parentCObject)) {
return parentCObject;
}
}
return null;
}
}