gosora/query_gen/lib/builder.go

204 lines
7.5 KiB
Go

/* WIP Under Construction */
package qgen
import "database/sql"
var Builder *builder
func init() {
Builder = &builder{conn: nil}
}
// A set of wrappers around the generator methods, so that we can use this inline in Gosora
type builder struct {
conn *sql.DB
adapter Adapter
}
func (build *builder) Accumulator() *Accumulator {
return &Accumulator{build.conn, build.adapter, nil}
}
// TODO: Move this method out of builder?
func (build *builder) Init(adapter string, config map[string]string) error {
err := build.SetAdapter(adapter)
if err != nil {
return err
}
conn, err := build.adapter.BuildConn(config)
build.conn = conn
return err
}
func (build *builder) SetConn(conn *sql.DB) {
build.conn = conn
}
func (build *builder) GetConn() *sql.DB {
return build.conn
}
func (build *builder) SetAdapter(name string) error {
adap, err := GetAdapter(name)
if err != nil {
return err
}
build.adapter = adap
return nil
}
func (build *builder) GetAdapter() Adapter {
return build.adapter
}
func (build *builder) DbVersion() (dbVersion string) {
build.conn.QueryRow(build.adapter.DbVersion()).Scan(&dbVersion)
return dbVersion
}
func (build *builder) Begin() (*sql.Tx, error) {
return build.conn.Begin()
}
func (build *builder) Tx(handler func(*TransactionBuilder) error) error {
tx, err := build.conn.Begin()
if err != nil {
return err
}
err = handler(&TransactionBuilder{tx, build.adapter, nil})
if err != nil {
tx.Rollback()
return err
}
return tx.Commit()
}
func (build *builder) prepare(res string, err error) (*sql.Stmt, error) {
if err != nil {
return nil, err
}
return build.conn.Prepare(res)
}
func (build *builder) SimpleSelect(table string, columns string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleSelect("_builder", table, columns, where, orderby, limit))
}
func (build *builder) SimpleCount(table string, where string, limit string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleCount("_builder", table, where, limit))
}
func (build *builder) SimpleLeftJoin(table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleLeftJoin("_builder", table1, table2, columns, joiners, where, orderby, limit))
}
func (build *builder) SimpleInnerJoin(table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleInnerJoin("_builder", table1, table2, columns, joiners, where, orderby, limit))
}
func (build *builder) DropTable(table string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.DropTable("_builder", table))
}
func (build *builder) CreateTable(table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.CreateTable("_builder", table, charset, collation, columns, keys))
}
func (build *builder) SimpleInsert(table string, columns string, fields string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleInsert("_builder", table, columns, fields))
}
func (build *builder) SimpleInsertSelect(ins DBInsert, sel DBSelect) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleInsertSelect("_builder", ins, sel))
}
func (build *builder) SimpleInsertLeftJoin(ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleInsertLeftJoin("_builder", ins, sel))
}
func (build *builder) SimpleInsertInnerJoin(ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleInsertInnerJoin("_builder", ins, sel))
}
func (build *builder) SimpleUpdate(table string, set string, where string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleUpdate("_builder", table, set, where))
}
func (build *builder) SimpleDelete(table string, where string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.SimpleDelete("_builder", table, where))
}
// I don't know why you need this, but here it is x.x
func (build *builder) Purge(table string) (stmt *sql.Stmt, err error) {
return build.prepare(build.adapter.Purge("_builder", table))
}
func (build *builder) prepareTx(tx *sql.Tx, res string, err error) (*sql.Stmt, error) {
if err != nil {
return nil, err
}
return tx.Prepare(res)
}
// These ones support transactions
func (build *builder) SimpleSelectTx(tx *sql.Tx, table string, columns string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleSelect("_builder", table, columns, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleCountTx(tx *sql.Tx, table string, where string, limit string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleCount("_builder", table, where, limit)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleLeftJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleLeftJoin("_builder", table1, table2, columns, joiners, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleInnerJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleInnerJoin("_builder", table1, table2, columns, joiners, where, orderby, limit)
return build.prepareTx(tx, res, err)
}
func (build *builder) CreateTableTx(tx *sql.Tx, table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) (stmt *sql.Stmt, err error) {
res, err := build.adapter.CreateTable("_builder", table, charset, collation, columns, keys)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleInsertTx(tx *sql.Tx, table string, columns string, fields string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleInsert("_builder", table, columns, fields)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleInsertSelectTx(tx *sql.Tx, ins DBInsert, sel DBSelect) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleInsertSelect("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleInsertLeftJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleInsertLeftJoin("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleInsertInnerJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleInsertInnerJoin("_builder", ins, sel)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleUpdateTx(tx *sql.Tx, table string, set string, where string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleUpdate("_builder", table, set, where)
return build.prepareTx(tx, res, err)
}
func (build *builder) SimpleDeleteTx(tx *sql.Tx, table string, where string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.SimpleDelete("_builder", table, where)
return build.prepareTx(tx, res, err)
}
// I don't know why you need this, but here it is x.x
func (build *builder) PurgeTx(tx *sql.Tx, table string) (stmt *sql.Stmt, err error) {
res, err := build.adapter.Purge("_builder", table)
return build.prepareTx(tx, res, err)
}