Examples of org.apache.cayenne.map.Relationship

org.apache.cayenne.map.Relationship
Defines a relationship between two entities. In a DataMap graph relationships represent "arcs" connecting entity "nodes". Relationships are directional, i.e. they have a notion of source and target entity. This makes DataMap a "digraph".

                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                ObjEntity targetEntity = (ObjEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity
                        .getDbEntity().getFullyQualifiedName());
            }

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                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                ObjEntity targetEntity = (ObjEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity
                        .getDbEntity().getFullyQualifiedName());
            }

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        // at least two elements to constitute a valid ordering path
        if (selectedPath == null || selectedPath.getPathCount() < 2) {
            return;
        }


        Relationship rel = (Relationship) selectedPath.getLastPathComponent();
        DbEntity target = (DbEntity) rel.getTargetEntity();
         /**
         * Initialize root with one of mapped ObjEntities.
         */
        Collection<ObjEntity> objEntities = target.getDataMap().getMappedEntities(target);

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        }
    }
    // Connects last selected DbRelationship in the path to the
    // last DbEntity, creating a dummy relationship if needed.
    private void connectEnds() {
        Relationship last = null;


        int size = dbRelationships.size();
        if (size > 0) {
            last = dbRelationships.get(size - 1);
        }


        Entity target = getEndEntity();


        if (target != null && (last == null || last.getTargetEntity() != target)) {
            // try to connect automatically, if we can't use dummy connector


            Entity source = (last == null) ? getStartEntity() : last.getTargetEntity();
            if (source != null) {


                Relationship anyConnector = source != null ? source
                        .getAnyRelationship(target) : null;


                if (anyConnector != null) {
                    dbRelationships.add((DbRelationship) anyConnector);
                }

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        this.fullPath = fullPath + '.' + lastPathComponent;


        if (oldPath != null) {
            this.idPath = oldPath;
            Relationship lastRelationship = currentEntity
                    .getRelationship(lastPathComponent);
            if (lastRelationship != null) {
                ObjEntity targetEntity = (ObjEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity
                        .getDbEntity()
                        .getFullyQualifiedName());
            }
            else {
                this.lastAlias = context.getTableAlias(oldPath, currentEntity
                        .getDbEntity()
                        .getFullyQualifiedName());


            }
        }
        else {
            Relationship lastRelationship = currentEntity
                    .getRelationship(lastPathComponent);


            ObjEntity targetEntity = null;
            if (lastRelationship != null) {
                targetEntity = (ObjEntity) lastRelationship.getTargetEntity();
            }
            else {
                targetEntity = currentEntity;
            }

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                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                DbEntity targetEntity = (DbEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity.getFullyQualifiedName());
            }


            this.idPath = newPath;

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                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                ObjEntity targetEntity = (ObjEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity
                        .getDbEntity().getFullyQualifiedName());
            }

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                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                ObjEntity targetEntity = (ObjEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity
                        .getDbEntityName());
            }

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                joinAppender.appendOuterJoin(
                        joinMarker,
                        new EJBQLTableId(idPath),
                        new EJBQLTableId(fullPath));


                Relationship lastRelationship = currentEntity
                        .getRelationship(lastPathComponent);
                DbEntity targetEntity = (DbEntity) lastRelationship.getTargetEntity();


                this.lastAlias = context.getTableAlias(fullPath, targetEntity.getName());
            }


            this.idPath = newPath;

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        DataObject source = findObject(nodeId);


        // find whether this is to-one or to-many
        ObjEntity sourceEntity = context.getEntityResolver().lookupObjEntity(source);
        Relationship relationship = sourceEntity.getRelationship(arcId.toString());


        DataObject target = findObject(targetNodeId);
        if (relationship.isToMany()) {
            source.addToManyTarget(relationship.getName(), target, false);
        }
        else {
            source.setToOneTarget(relationship.getName(), target, false);
        }
    }

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