Examples with ObjectLiteral org.datanucleus.store.rdbms.sql.expression.ObjectLiteral used on opensource projects

Example 1 with ObjectLiteral

use of org.datanucleus.store.rdbms.sql.expression.ObjectLiteral in project datanucleus-rdbms by datanucleus.

the class JDOHelperGetObjectIdMethod method getExpression.

/* (non-Javadoc)
     * @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
     */
public SQLExpression getExpression(SQLStatement stmt, SQLExpression ignore, List<SQLExpression> args) {
    if (args == null || args.size() == 0) {
        throw new NucleusUserException("Cannot invoke JDOHelper.getObjectId without an argument");
    }
    SQLExpression expr = args.get(0);
    if (expr == null) {
        return new NullLiteral(stmt, null, null, null);
    }
    if (expr instanceof SQLLiteral) {
        RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
        ApiAdapter api = storeMgr.getApiAdapter();
        Object id = api.getIdForObject(((SQLLiteral) expr).getValue());
        if (id == null) {
            return new NullLiteral(stmt, null, null, null);
        }
        JavaTypeMapping m = stmt.getSQLExpressionFactory().getMappingForType(id.getClass(), true);
        return new ObjectLiteral(stmt, m, id, null);
    } else if (ObjectExpression.class.isAssignableFrom(expr.getClass())) {
        // When the expression represents a PC object need to extract out as the identity
        if (expr.getJavaTypeMapping() instanceof PersistableMapping) {
            JavaTypeMapping mapping = new PersistableIdMapping((PersistableMapping) expr.getJavaTypeMapping());
            return new ObjectExpression(stmt, expr.getSQLTable(), mapping);
        } else if (expr.getJavaTypeMapping() instanceof ReferenceMapping) {
            JavaTypeMapping mapping = new ReferenceIdMapping((ReferenceMapping) expr.getJavaTypeMapping());
            return new ObjectExpression(stmt, expr.getSQLTable(), mapping);
        }
        return expr;
    }
    throw new IllegalExpressionOperationException("JDOHelper.getObjectId", expr);
}

Example 2 with ObjectLiteral

use of org.datanucleus.store.rdbms.sql.expression.ObjectLiteral in project datanucleus-rdbms by datanucleus.

the class JDOHelperGetVersionMethod method getExpression.

/* (non-Javadoc)
     * @see org.datanucleus.store.rdbms.sql.method.SQLMethod#getExpression(org.datanucleus.store.rdbms.sql.expression.SQLExpression, java.util.List)
     */
public SQLExpression getExpression(SQLStatement stmt, SQLExpression ignore, List<SQLExpression> args) {
    if (args == null || args.size() == 0) {
        throw new NucleusUserException("Cannot invoke JDOHelper.getVersion without an argument");
    }
    SQLExpression expr = args.get(0);
    if (expr == null) {
        throw new NucleusUserException("Cannot invoke JDOHelper.getVersion on null expression");
    }
    if (expr instanceof SQLLiteral) {
        RDBMSStoreManager storeMgr = stmt.getRDBMSManager();
        ApiAdapter api = storeMgr.getApiAdapter();
        Object obj = ((SQLLiteral) expr).getValue();
        if (obj == null || !api.isPersistable(obj)) {
            return new NullLiteral(stmt, null, null, null);
        }
        Object ver = stmt.getRDBMSManager().getApiAdapter().getVersionForObject(obj);
        JavaTypeMapping m = stmt.getSQLExpressionFactory().getMappingForType(ver.getClass(), true);
        return new ObjectLiteral(stmt, m, ver, null);
    } else if (ObjectExpression.class.isAssignableFrom(expr.getClass())) {
        if (((ObjectExpression) expr).getJavaTypeMapping() instanceof PersistableMapping) {
            JavaTypeMapping mapping = ((ObjectExpression) expr).getJavaTypeMapping();
            DatastoreClass table = (DatastoreClass) expr.getSQLTable().getTable();
            if (// Version of candidate
            table.getIdMapping() == mapping) {
                mapping = table.getSurrogateMapping(SurrogateColumnType.VERSION, true);
                if (mapping == null) {
                    throw new NucleusUserException("Cannot use JDOHelper.getVersion on object that has no version information");
                }
                if (table.getVersionMetaData().getVersionStrategy() == VersionStrategy.VERSION_NUMBER) {
                    return new NumericExpression(stmt, expr.getSQLTable(), mapping);
                }
                return new TemporalExpression(stmt, expr.getSQLTable(), mapping);
            }
            throw new NucleusUserException("Dont currently support JDOHelper.getVersion(ObjectExpression) for expr=" + expr + " on table=" + expr.getSQLTable());
        // TODO Implement this
        }
        return expr;
    }
    throw new IllegalExpressionOperationException("JDOHelper.getVersion", expr);
}