Examples with ColumnDescriptor org.apache.cayenne.access.jdbc.ColumnDescriptor used on opensource projects

Example 1 with ColumnDescriptor

use of org.apache.cayenne.access.jdbc.ColumnDescriptor in project cayenne by apache.

the class PrefetchProcessorJointNode method buildRowMapping.

/**
 * Configures row columns mapping for this node entity.
 */
private void buildRowMapping() {
    final Map<String, ColumnDescriptor> targetSource = new TreeMap<>();
    // build a DB path .. find parent node that terminates the joint group...
    PrefetchTreeNode jointRoot = this;
    while (jointRoot.getParent() != null && !jointRoot.isDisjointPrefetch() && !jointRoot.isDisjointByIdPrefetch()) {
        jointRoot = jointRoot.getParent();
    }
    final String prefix;
    if (jointRoot != this) {
        Expression objectPath = ExpressionFactory.exp(getPath(jointRoot));
        ASTPath translated = (ASTPath) ((PrefetchProcessorNode) jointRoot).getResolver().getEntity().translateToDbPath(objectPath);
        // make sure we do not include "db:" prefix
        prefix = translated.getOperand(0) + ".";
    } else {
        prefix = "";
    }
    if (getParent() != null && !getParent().isPhantom() && getIncoming() != null && !getIncoming().getRelationship().isFlattened()) {
        DbRelationship r = getIncoming().getRelationship().getDbRelationships().get(0);
        for (final DbJoin join : r.getJoins()) {
            appendColumn(targetSource, join.getTargetName(), prefix + join.getTargetName());
        }
    }
    ClassDescriptor descriptor = resolver.getDescriptor();
    descriptor.visitAllProperties(new PropertyVisitor() {

        public boolean visitAttribute(AttributeProperty property) {
            String target = property.getAttribute().getDbAttributePath();
            appendColumn(targetSource, target, prefix + target);
            return true;
        }

        public boolean visitToMany(ToManyProperty property) {
            return visitRelationship(property);
        }

        public boolean visitToOne(ToOneProperty property) {
            return visitRelationship(property);
        }

        private boolean visitRelationship(ArcProperty arc) {
            DbRelationship dbRel = arc.getRelationship().getDbRelationships().get(0);
            for (DbAttribute attribute : dbRel.getSourceAttributes()) {
                String target = attribute.getName();
                appendColumn(targetSource, target, prefix + target);
            }
            return true;
        }
    });
    // append id columns ... (some may have been appended already via relationships)
    for (String pkName : descriptor.getEntity().getPrimaryKeyNames()) {
        appendColumn(targetSource, pkName, prefix + pkName);
    }
    // append inheritance discriminator columns...
    for (ObjAttribute column : descriptor.getDiscriminatorColumns()) {
        String target = column.getDbAttributePath();
        appendColumn(targetSource, target, prefix + target);
    }
    int size = targetSource.size();
    this.rowCapacity = (int) Math.ceil(size / 0.75);
    this.columns = new ColumnDescriptor[size];
    targetSource.values().toArray(columns);
}

Example 2 with ColumnDescriptor

use of org.apache.cayenne.access.jdbc.ColumnDescriptor in project cayenne by apache.

the class PrefetchProcessorJointNode method appendColumn.

private ColumnDescriptor appendColumn(Map<String, ColumnDescriptor> map, String name, String label) {
    ColumnDescriptor column = map.get(name);
    if (column == null) {
        column = new ColumnDescriptor();
        column.setName(name);
        column.setDataRowKey(label);
        map.put(name, column);
    }
    return column;
}

Example 3 with ColumnDescriptor

use of org.apache.cayenne.access.jdbc.ColumnDescriptor in project cayenne by apache.

the class PrefetchProcessorJointNode method rowFromFlatRow.

/**
 * Returns a DataRow from the flat row.
 */
DataRow rowFromFlatRow(DataRow flatRow) {
    DataRow row = new DataRow(rowCapacity);
    // extract subset of flat row columns, recasting to the target keys
    for (ColumnDescriptor column : columns) {
        row.put(column.getName(), flatRow.get(column.getDataRowKey()));
    }
    // since JDBC row reader won't inject JOINED entity name, we have to
    // detect it here...
    ClassDescriptor descriptor = resolver.getDescriptor();
    ObjEntity entity = descriptor.getEntityInheritanceTree().entityMatchingRow(row);
    row.setEntityName(entity.getName());
    return row;
}

Example 4 with ColumnDescriptor

use of org.apache.cayenne.access.jdbc.ColumnDescriptor in project cayenne by apache.

the class CryptoRowReaderFactoryDecorator method encryptedRowDescriptor.

protected RowDescriptor encryptedRowDescriptor(RowDescriptor descriptor, ExtendedTypeMap typeMap) {
    // need to tweak the original descriptor to ensure binary columns are read as binary, eben if the plain Java
    // type is not a byte[]
    ColumnDescriptor[] originalColumns = descriptor.getColumns();
    int len = originalColumns.length;
    ExtendedType[] originalConverters = descriptor.getConverters();
    ExtendedType[] encryptedConverters = new ExtendedType[len];
    for (int i = 0; i < len; i++) {
        DbAttribute attribute = originalColumns[i].getAttribute();
        ExtendedType t = originalConverters[i];
        if (attribute != null && columnMapper.isEncrypted(attribute)) {
            // only char or binary columns can store encrypted data
            if (TypesMapping.isBinary(attribute.getType())) {
                t = typeMap.getRegisteredType(byte[].class);
            } else if (TypesMapping.isCharacter(attribute.getType())) {
                t = typeMap.getRegisteredType(String.class);
            }
        // else - warning?
        }
        encryptedConverters[i] = t;
    }
    return new RowDescriptor(originalColumns, encryptedConverters);
}

Example 5 with ColumnDescriptor

use of org.apache.cayenne.access.jdbc.ColumnDescriptor in project cayenne by apache.

the class VelocitySQLTemplateProcessor method processTemplate.

SQLStatement processTemplate(String template, SimpleNode parsedTemplate, Map<String, Object> parameters) {
    List<ParameterBinding> bindings = new ArrayList<>();
    List<ColumnDescriptor> results = new ArrayList<>();
    parameters.put(BINDINGS_LIST_KEY, bindings);
    parameters.put(RESULT_COLUMNS_LIST_KEY, results);
    parameters.put(HELPER_KEY, renderingUtils);
    String sql;
    try {
        sql = buildStatement(new VelocityContext(parameters), template, parsedTemplate);
    } catch (Exception e) {
        throw new CayenneRuntimeException("Error processing Velocity template", e);
    }
    ParameterBinding[] bindingsArray = new ParameterBinding[bindings.size()];
    bindings.toArray(bindingsArray);
    ColumnDescriptor[] resultsArray = new ColumnDescriptor[results.size()];
    results.toArray(resultsArray);
    return new SQLStatement(sql, resultsArray, bindingsArray);
}