Examples with AutoGenerated eu.esdihumboldt.hale.common.schema.model.constraint.property.AutoGenerated used on opensource projects

Example 1 with AutoGenerated

use of eu.esdihumboldt.hale.common.schema.model.constraint.property.AutoGenerated in project hale by halestudio.

the class JDBCInstanceWriter method getInsertStatement.

/**
 * Create a prepared insert statement, based on the given type definition.
 * Currently, auto incremented fields are not inserted into the statement.
 *
 * @param type the type definition
 * @param properties the set properties of the instance for which this
 *            statement is
 * @param typeStatements the already created statements
 * @param connection the database connection
 * @return the insert statement
 * @throws SQLException if creating the prepared statement fails
 */
private PreparedStatement getInsertStatement(TypeDefinition type, Set<QName> properties, Map<TypeDefinition, Map<Set<QName>, PreparedStatement>> typeStatements, Connection connection) throws SQLException {
    Map<Set<QName>, PreparedStatement> typeSpecificMap = typeStatements.get(type);
    if (typeSpecificMap == null) {
        typeSpecificMap = new HashMap<Set<QName>, PreparedStatement>();
        typeStatements.put(type, typeSpecificMap);
    }
    PreparedStatement result = typeSpecificMap.get(properties);
    if (result == null) {
        String tableName = type.getConstraint(DatabaseTable.class).getFullTableName();
        // create prepared statement SQL
        StringBuffer pSql = new StringBuffer();
        pSql.append("INSERT INTO ");
        pSql.append(tableName);
        pSql.append(" (");
        StringBuffer valuesSql = new StringBuffer();
        boolean first = true;
        for (QName property : properties) {
            AutoGenerated auto = ((PropertyDefinition) type.getChild(property)).getConstraint(AutoGenerated.class);
            // statement (if writing is ordered)
            if (!auto.isEnabled() || isWriteUnordered()) {
                if (first)
                    first = false;
                else {
                    pSql.append(", ");
                    valuesSql.append(",");
                }
                pSql.append('"').append(property.getLocalPart()).append('"');
                valuesSql.append('?');
            }
        }
        pSql.append(") VALUES (");
        pSql.append(valuesSql);
        pSql.append(")");
        // XXX Actually we don't necessarily need the auto generated keys,
        // we need the primary key!
        // XXX , Statement.RETURN_GENERATED_KEYS does not work with batches
        // in PostgreSQL
        // Auto generated keys are returned, for creating a map with old
        // value and auto generated.
        // As it does not work with batches in PostGreSQL, each instance
        // which has auto incremented ids are written one at a time and
        // returned the auto generated key.
        result = connection.prepareStatement(pSql.toString(), Statement.RETURN_GENERATED_KEYS);
        typeSpecificMap.put(properties, result);
    }
    return result;
}

Example 2 with AutoGenerated

use of eu.esdihumboldt.hale.common.schema.model.constraint.property.AutoGenerated in project hale by halestudio.

the class JDBCInstanceWriter method populateInsertStatementOrExecuteAutoIncStatement.

/**
 * Populate a prepared insert statement with values from the given instance.
 * Checks if the property has auto incremental constraint, if it has then it
 * maps the original old id to the id that is auto incremented while
 * inserting the value. This mapping is used when inserting the foreign key
 * values associated with those auto incremented column ids whose value has
 * been changed. Thus, insertion of the foreign key wont fail. It will
 * either execute the statement directly or add it into the batches
 * depending upon the auto incremented flag.
 *
 * @param statement the insert statement
 * @param properties the properties to fill the statement with
 * @param instance the instance
 * @param reporter the reporter
 * @param conn Connection (used for Geometry conversion for oracle)
 * @throws SQLException if configuring the statement fails
 */
private void populateInsertStatementOrExecuteAutoIncStatement(PreparedStatement statement, Set<QName> properties, Instance instance, IOReporter reporter, Connection conn) throws SQLException {
    TypeDefinition type = instance.getDefinition();
    int index = 1;
    Object oldValue = null;
    boolean isAutoIncremented = false;
    for (QName propertyName : properties) {
        PropertyDefinition property = (PropertyDefinition) type.getChild(propertyName);
        Object[] values = instance.getProperty(propertyName);
        SQLType sqlType = property.getPropertyType().getConstraint(SQLType.class);
        if (!sqlType.isSet()) {
            reporter.error(new IOMessageImpl("SQL type not set. Please only export to schemas read from a database.", null));
            statement.setObject(index, null);
            continue;
        }
        SQLArray arrayInfo = property.getPropertyType().getConstraint(SQLArray.class);
        Object value;
        if (arrayInfo.isArray() && arrayInfo.getDimension() <= 1) {
            // array as multiple occurrence property
            value = (values == null) ? (new Object[0]) : (values);
        } else {
            // single value
            if (values != null && values.length > 1)
                reporter.warn(new IOMessageImpl("Multiple values for a property. Only exporting first.", null));
            value = (values == null || values.length == 0) ? null : values[0];
        }
        AutoGenerated auto = property.getConstraint(AutoGenerated.class);
        if (!isWriteUnordered()) {
            if (auto.isEnabled()) {
                isAutoIncremented = true;
                if (value != null) {
                    oldValue = value;
                }
                continue;
            }
        }
        Reference ref = property.getConstraint(Reference.class);
        if (ref.getReferencedTypes() != null) {
            TypeDefinition td = (TypeDefinition) ref.getReferencedTypes().toArray()[0];
            Map<Object, Long> marshMallow = typAuto.get(td);
            if (marshMallow != null && value != null) {
                // lookup identifier for reference
                value = marshMallow.get(processLookupId(value));
            }
        }
        if (values == null || values.length == 0) {
            // XXX The default value could be a function call.
            // Better would be to leave the column out of the insert
            // statement, or set it to the SQL keyword "DEFAULT".
            DefaultValue defaultValue = property.getConstraint(DefaultValue.class);
            if (defaultValue.isSet())
                statement.setObject(index, defaultValue.getValue(), sqlType.getType());
            else if (property.getConstraint(NillableFlag.class).isEnabled())
                statement.setNull(index, sqlType.getType());
            else {
                // no default, not nillable, will not work...
                // set it to null here and let query fail (probably)
                // XXX maybe skip this insert?
                statement.setNull(index, sqlType.getType());
                reporter.warn(new IOMessageImpl("Property no value, not nillable, no default value, insert will probably fail.", null));
            }
        } else if (value == null)
            statement.setNull(index, sqlType.getType());
        else
            setStatementParameter(statement, index, value, property, sqlType.getType(), reporter, conn);
        index++;
    }
    if (isAutoIncremented) {
        statement.execute();
        ResultSet rs = statement.getGeneratedKeys();
        Long newValue = null;
        while (rs.next()) {
            newValue = rs.getLong(1);
        }
        addIDMapping(type, oldValue, newValue);
    } else {
        statement.addBatch();
    }
}