Examples with DbRelationship org.apache.cayenne.map.DbRelationship used on opensource projects

Example 66 with DbRelationship

use of org.apache.cayenne.map.DbRelationship in project cayenne by apache.

the class DbRelationshipValidator method checkForDuplicates.

/**
 * Per CAY-1813, make sure two (or more) DbRelationships do not map to the
 * same database path.
 */
private void checkForDuplicates(DbRelationship relationship, ValidationResult validationResult) {
    if (relationship != null && relationship.getName() != null && relationship.getTargetEntityName() != null) {
        String dbRelationshipPath = relationship.getTargetEntityName() + "." + getJoins(relationship);
        DbEntity entity = relationship.getSourceEntity();
        for (DbRelationship comparisonRelationship : entity.getRelationships()) {
            if (relationship != comparisonRelationship) {
                String comparisonDbRelationshipPath = comparisonRelationship.getTargetEntityName() + "." + getJoins(comparisonRelationship);
                if (dbRelationshipPath.equals(comparisonDbRelationshipPath)) {
                    addFailure(validationResult, relationship, "DbEntity '%s' contains a duplicate DbRelationship mapping ('%s' -> '%s')", entity.getName(), relationship.getName(), dbRelationshipPath);
                    // Duplicate found, stop.
                    return;
                }
            }
        }
    }
}

Example 67 with DbRelationship

use of org.apache.cayenne.map.DbRelationship in project cayenne by apache.

the class ObjRelationshipValidator method validate.

void validate(ObjRelationship relationship, ValidationResult validationResult) {
    if (Util.isEmptyString(relationship.getName())) {
        addFailure(validationResult, relationship, "Unnamed ObjRelationship");
    } else if (relationship.getSourceEntity().getAttribute(relationship.getName()) != null) {
        // check if there are attributes having the same name
        addFailure(validationResult, relationship, "ObjRelationship '%s' has the same name as one of ObjAttributes", toString(relationship));
    } else {
        NameValidationHelper helper = NameValidationHelper.getInstance();
        String invalidChars = helper.invalidCharsInObjPathComponent(relationship.getName());
        if (invalidChars != null) {
            addFailure(validationResult, relationship, "ObjRelationship name '%s' contains invalid characters: %s", toString(relationship), invalidChars);
        } else if (helper.invalidDataObjectProperty(relationship.getName())) {
            addFailure(validationResult, relationship, "ObjRelationship name '%s' is a reserved word", toString(relationship));
        }
    }
    if (relationship.getTargetEntity() == null) {
        addFailure(validationResult, relationship, "ObjRelationship '%s' has no target entity", toString(relationship));
    } else {
        // check for missing DbRelationship mappings
        List<DbRelationship> dbRels = relationship.getDbRelationships();
        if (dbRels.isEmpty()) {
            addFailure(validationResult, relationship, "ObjRelationship '%s' has no DbRelationship mapping", toString(relationship));
        } else {
            DbEntity expectedSrc = relationship.getSourceEntity().getDbEntity();
            DbEntity expectedTarget = relationship.getTargetEntity().getDbEntity();
            if ((dbRels.get(0)).getSourceEntity() != expectedSrc || (dbRels.get(dbRels.size() - 1)).getTargetEntity() != expectedTarget) {
                addFailure(validationResult, relationship, "ObjRelationship '%s' has incomplete DbRelationship mapping", toString(relationship));
            }
        }
    }
    // foreign key attributes are mandatory.
    if (relationship.isToMany() && !relationship.isFlattened() && (relationship.getDeleteRule() == DeleteRule.NULLIFY)) {
        ObjRelationship inverse = relationship.getReverseRelationship();
        if (inverse != null) {
            DbRelationship firstRel = inverse.getDbRelationships().get(0);
            Iterator<DbJoin> attributePairIterator = firstRel.getJoins().iterator();
            // by default, the relation will be check for mandatory.
            boolean check = true;
            while (attributePairIterator.hasNext()) {
                DbJoin pair = attributePairIterator.next();
                if (!pair.getSource().isMandatory()) {
                    // a field of the fk can be nullable, cancel the check.
                    check = false;
                    break;
                }
            }
            if (check) {
                addFailure(validationResult, relationship, "ObjRelationship '%s' has a Nullify delete rule and a mandatory reverse relationship", toString(relationship));
            }
        }
    }
    // check for relationships with same source and target entities
    ObjEntity entity = relationship.getSourceEntity();
    for (ObjRelationship rel : entity.getRelationships()) {
        if (relationship.getDbRelationshipPath() != null && relationship.getDbRelationshipPath().equals(rel.getDbRelationshipPath())) {
            if (relationship != rel && relationship.getTargetEntity() == rel.getTargetEntity() && relationship.getSourceEntity() == rel.getSourceEntity()) {
                addFailure(validationResult, relationship, "ObjectRelationship '%s' duplicates relationship '%s'", toString(relationship), toString(rel));
            }
        }
    }
    // check for invalid relationships in inherited entities
    if (relationship.getReverseRelationship() != null) {
        ObjRelationship revRel = relationship.getReverseRelationship();
        if (relationship.getSourceEntity() != revRel.getTargetEntity() || relationship.getTargetEntity() != revRel.getSourceEntity()) {
            addFailure(validationResult, revRel, "Usage of super entity's relationships '%s' as reversed relationships for sub entity is discouraged", toString(revRel));
        }
    }
    checkForDuplicates(relationship, validationResult);
}

Example 68 with DbRelationship

use of org.apache.cayenne.map.DbRelationship in project cayenne by apache.

the class QualifierTranslator method appendObjectMatch.

protected void appendObjectMatch() throws IOException {
    if (!matchingObject || objectMatchTranslator == null) {
        throw new IllegalStateException("An invalid attempt to append object match.");
    }
    // turn off special handling, so that all the methods behave as a
    // superclass's
    // impl.
    matchingObject = false;
    boolean first = true;
    DbRelationship relationship = objectMatchTranslator.getRelationship();
    if (!relationship.isToMany() && !relationship.isToPK()) {
        queryAssembler.dbRelationshipAdded(relationship, JoinType.INNER, objectMatchTranslator.getJoinSplitAlias());
    }
    Iterator<String> it = objectMatchTranslator.keys();
    while (it.hasNext()) {
        if (first) {
            first = false;
        } else {
            out.append(" AND ");
        }
        String key = it.next();
        DbAttribute attr = objectMatchTranslator.getAttribute(key);
        Object val = objectMatchTranslator.getValue(key);
        processColumn(attr);
        out.append(objectMatchTranslator.getOperation());
        appendLiteral(val, attr, objectMatchTranslator.getExpression());
    }
    objectMatchTranslator.reset();
}

Example 69 with DbRelationship

use of org.apache.cayenne.map.DbRelationship in project cayenne by apache.

the class AshwoodEntitySorter method sortObjectsForEntity.

@Override
public void sortObjectsForEntity(ObjEntity objEntity, List<?> objects, boolean deleteOrder) {
    indexSorter();
    List<Persistent> persistent = (List<Persistent>) objects;
    DbEntity dbEntity = objEntity.getDbEntity();
    // if no sorting is required
    if (!isReflexive(dbEntity)) {
        return;
    }
    int size = persistent.size();
    if (size == 0) {
        return;
    }
    EntityResolver resolver = persistent.get(0).getObjectContext().getEntityResolver();
    ClassDescriptor descriptor = resolver.getClassDescriptor(objEntity.getName());
    List<DbRelationship> reflexiveRels = reflexiveDbEntities.get(dbEntity);
    String[] reflexiveRelNames = new String[reflexiveRels.size()];
    for (int i = 0; i < reflexiveRelNames.length; i++) {
        DbRelationship dbRel = reflexiveRels.get(i);
        ObjRelationship objRel = (dbRel != null ? objEntity.getRelationshipForDbRelationship(dbRel) : null);
        reflexiveRelNames[i] = (objRel != null ? objRel.getName() : null);
    }
    List<Persistent> sorted = new ArrayList<>(size);
    Digraph<Persistent, Boolean> objectDependencyGraph = new MapDigraph<>();
    Object[] masters = new Object[reflexiveRelNames.length];
    for (int i = 0; i < size; i++) {
        Persistent current = (Persistent) objects.get(i);
        objectDependencyGraph.addVertex(current);
        int actualMasterCount = 0;
        for (int k = 0; k < reflexiveRelNames.length; k++) {
            String reflexiveRelName = reflexiveRelNames[k];
            if (reflexiveRelName == null) {
                continue;
            }
            masters[k] = descriptor.getProperty(reflexiveRelName).readProperty(current);
            if (masters[k] == null) {
                masters[k] = findReflexiveMaster(current, objEntity.getRelationship(reflexiveRelName), current.getObjectId().getEntityName());
            }
            if (masters[k] != null) {
                actualMasterCount++;
            }
        }
        int mastersFound = 0;
        for (int j = 0; j < size && mastersFound < actualMasterCount; j++) {
            if (i == j) {
                continue;
            }
            Persistent masterCandidate = persistent.get(j);
            for (Object master : masters) {
                if (masterCandidate == master) {
                    objectDependencyGraph.putArc(masterCandidate, current, Boolean.TRUE);
                    mastersFound++;
                }
            }
        }
    }
    IndegreeTopologicalSort<Persistent> sorter = new IndegreeTopologicalSort<>(objectDependencyGraph);
    while (sorter.hasNext()) {
        Persistent o = sorter.next();
        if (o == null) {
            throw new CayenneRuntimeException("Sorting objects for %s failed. Cycles found.", objEntity.getClassName());
        }
        sorted.add(o);
    }
    // since API requires sorting within the same array,
    // simply replace all objects with objects in the right order...
    // may come up with something cleaner later
    persistent.clear();
    persistent.addAll(sorted);
    if (deleteOrder) {
        Collections.reverse(persistent);
    }
}

Example 70 with DbRelationship

use of org.apache.cayenne.map.DbRelationship in project cayenne by apache.

the class AshwoodEntitySorter method findReflexiveMaster.

protected Object findReflexiveMaster(Persistent object, ObjRelationship toOneRel, String targetEntityName) {
    DbRelationship finalRel = toOneRel.getDbRelationships().get(0);
    ObjectContext context = object.getObjectContext();
    // the method
    if (object.getObjectId().isTemporary()) {
        return null;
    }
    ObjectIdQuery query = new ObjectIdQuery(object.getObjectId(), true, ObjectIdQuery.CACHE);
    QueryResponse response = context.getChannel().onQuery(null, query);
    List<?> result = response.firstList();
    if (result == null || result.size() == 0) {
        return null;
    }
    DataRow snapshot = (DataRow) result.get(0);
    ObjectId id = snapshot.createTargetObjectId(targetEntityName, finalRel);
    // hollow objects
    return (id != null) ? context.getGraphManager().getNode(id) : null;
}