Examples with ClassDescriptor org.apache.cayenne.reflect.ClassDescriptor used on opensource projects

Example 76 with ClassDescriptor

use of org.apache.cayenne.reflect.ClassDescriptor in project cayenne by apache.

the class QualifierTranslator method extractQualifier.

protected Expression extractQualifier() {
    // if additional qualifier is set, use it
    if (this.qualifier != null) {
        return this.qualifier;
    }
    Query q = queryAssembler.getQuery();
    Expression qualifier = ((SelectQuery<?>) q).getQualifier();
    // append Entity qualifiers, taking inheritance into account
    ObjEntity entity = getObjEntity();
    if (entity != null) {
        ClassDescriptor descriptor = queryAssembler.getEntityResolver().getClassDescriptor(entity.getName());
        Expression entityQualifier = descriptor.getEntityInheritanceTree().qualifierForEntityAndSubclasses();
        if (entityQualifier != null) {
            qualifier = (qualifier != null) ? qualifier.andExp(entityQualifier) : entityQualifier;
        }
    }
    // Attaching root Db entity's qualifier
    if (getDbEntity() != null) {
        Expression dbQualifier = getDbEntity().getQualifier();
        if (dbQualifier != null) {
            dbQualifier = dbQualifier.transform(new DbEntityQualifierTransformer());
            qualifier = qualifier == null ? dbQualifier : qualifier.andExp(dbQualifier);
        }
    }
    return qualifier;
}

Example 77 with ClassDescriptor

use of org.apache.cayenne.reflect.ClassDescriptor 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 78 with ClassDescriptor

use of org.apache.cayenne.reflect.ClassDescriptor in project cayenne by apache.

the class AnnotationCommitLogEntityFactory method createDescriptor.

private CommitLogEntity createDescriptor(String entityName) {
    EntityResolver entityResolver = getEntityResolver();
    ClassDescriptor classDescriptor = entityResolver.getClassDescriptor(entityName);
    CommitLog a = classDescriptor.getObjectClass().getAnnotation(CommitLog.class);
    if (a == null) {
        return BLOCKED_ENTITY;
    }
    ObjEntity entity = entityResolver.getObjEntity(entityName);
    return new MutableCommitLogLogEntity(entity).setConfidential(a.confidential()).setIgnoreProperties(a.ignoredProperties()).setIgnoreAttributes(a.ignoreAttributes()).setIgnoreToOneRelationships(a.ignoreToOneRelationships()).setIgnoreToManyRelationships(a.ignoreToManyRelationships());
}

Example 79 with ClassDescriptor

use of org.apache.cayenne.reflect.ClassDescriptor in project cayenne by apache.

the class EJBQLPathAnaliserTranslator method visitMemberOf.

@Override
public boolean visitMemberOf(EJBQLExpression expression) {
    if (expression.getChildrenCount() != 2) {
        throw new EJBQLException("MEMBER OF must have exactly two children, got: " + expression.getChildrenCount());
    }
    if (!(expression.getChild(1) instanceof EJBQLPath)) {
        throw new EJBQLException("Second child of the MEMBER OF must be a collection path, got: " + expression.getChild(1));
    }
    QuotingStrategy quoter = context.getQuotingStrategy();
    EJBQLPath path = (EJBQLPath) expression.getChild(1);
    // make sure the ID for the path does not overlap with other condition
    // joins...
    String id = path.getAbsolutePath();
    String correlatedEntityId = path.getId();
    ClassDescriptor correlatedEntityDescriptor = context.getEntityDescriptor(correlatedEntityId);
    String correlatedTableName = quoter.quotedFullyQualifiedName(correlatedEntityDescriptor.getEntity().getDbEntity());
    String correlatedTableAlias = context.getTableAlias(correlatedEntityId, correlatedTableName);
    String subqueryId = context.createIdAlias(id);
    ClassDescriptor targetDescriptor = context.getEntityDescriptor(subqueryId);
    if (expression.isNegated()) {
        context.append(" NOT");
    }
    context.append(" EXISTS (SELECT 1 FROM ");
    String subqueryTableName = quoter.quotedFullyQualifiedName(targetDescriptor.getEntity().getDbEntity());
    String subqueryRootAlias = context.getTableAlias(subqueryId, subqueryTableName);
    ObjRelationship relationship = correlatedEntityDescriptor.getEntity().getRelationship(path.getRelativePath());
    if (relationship.getDbRelationshipPath().contains(".")) {
        // if the DbRelationshipPath contains '.', the relationship is
        // flattened
        subqueryRootAlias = processFlattenedRelationShip(subqueryRootAlias, relationship);
    } else {
        // not using "AS" to separate table name and alias name - OpenBase
        // doesn't
        // support "AS", and the rest of the databases do not care
        context.append(subqueryTableName).append(' ').append(subqueryRootAlias);
    }
    context.append(" WHERE");
    DbRelationship correlatedJoinRelationship = context.getIncomingRelationships(new EJBQLTableId(id)).get(0);
    for (DbJoin join : correlatedJoinRelationship.getJoins()) {
        context.append(' ').append(subqueryRootAlias).append('.').append(join.getTargetName()).append(" = ");
        context.append(correlatedTableAlias).append('.').append(quoter.quotedSourceName(join));
        context.append(" AND");
    }
    // translate subquery_root_id = LHS_of_memberof
    EJBQLEquals equals = new EJBQLEquals(-1);
    EJBQLIdentificationVariable identifier = new EJBQLIdentificationVariable(-1);
    identifier.setText(subqueryId);
    equals.jjtAddChild(identifier, 0);
    equals.jjtAddChild((Node) expression.getChild(0), 1);
    equals.visit(this);
    context.append(")");
    return false;
}

Example 80 with ClassDescriptor

use of org.apache.cayenne.reflect.ClassDescriptor in project cayenne by apache.

the class EJBQLPathAnaliserTranslator method visitIdentificationVariable.

@Override
public boolean visitIdentificationVariable(EJBQLExpression expression) {
    // this is a match on a variable, like "x = :x"
    ClassDescriptor descriptor = context.getEntityDescriptor(expression.getText());
    if (descriptor == null) {
        throw new EJBQLException("Invalid identification variable: " + expression.getText());
    }
    DbEntity table = descriptor.getEntity().getDbEntity();
    String alias = context.getTableAlias(expression.getText(), context.getQuotingStrategy().quotedFullyQualifiedName(table));
    Collection<DbAttribute> pks = table.getPrimaryKeys();
    if (pks.size() == 1) {
        DbAttribute pk = pks.iterator().next();
        context.append(' ').append(alias).append('.').append(context.getQuotingStrategy().quotedName(pk));
    } else {
        throw new EJBQLException("Multi-column PK to-many matches are not yet supported.");
    }
    return false;
}