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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Copyright 2021 ecodeclub | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package rows | ||
|
|
||
| import ( | ||
| "database/sql" | ||
|
|
||
| "github.com/ecodeclub/eorm/internal/errs" | ||
| ) | ||
|
|
||
| var _ Rows = (*DataRows)(nil) | ||
|
|
||
| // DataRows 直接传入数据，伪装成了一个 Rows | ||
| // 非线程安全实现 | ||
| type DataRows struct { | ||
| data [][]any | ||
| len int | ||
| columns []string | ||
| columnTypes []*sql.ColumnType | ||
| // 第几行 | ||
| idx int | ||
| } | ||
|
|
||
| func (*DataRows) NextResultSet() bool { | ||
| return false | ||
| } | ||
|
|
||
| func (d *DataRows) ColumnTypes() ([]*sql.ColumnType, error) { | ||
| return d.columnTypes, nil | ||
| } | ||
|
|
||
| func NewDataRows(data [][]any, columns []string, columnTypes []*sql.ColumnType) *DataRows { | ||
| // 这里并没有什么必要检查 data 和 columns 的输入 | ||
| // 因为只有在很故意的情况下，data 和 columns 才可能会有问题 | ||
| return &DataRows{ | ||
| data: data, | ||
| len: len(data), | ||
| columns: columns, | ||
| idx: -1, | ||
| columnTypes: columnTypes, | ||
| } | ||
| } | ||
|
|
||
| func (d *DataRows) Next() bool { | ||
| if d.idx >= d.len-1 { | ||
| return false | ||
| } | ||
| d.idx++ | ||
| return true | ||
| } | ||
|
|
||
| func (d *DataRows) Scan(dest ...any) error { | ||
| // 不需要检测，作为内部代码我们可以预期用户会主动控制 | ||
| data := d.data[d.idx] | ||
| if len(data) != len(dest) { | ||
| return errs.NewErrScanWrongDestinationArguments(len(data), len(dest)) | ||
| } | ||
| for idx, dst := range dest { | ||
| if err := ConvertAssign(dst, data[idx]); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (*DataRows) Close() error { | ||
| return nil | ||
| } | ||
|
|
||
| func (d *DataRows) Columns() ([]string, error) { | ||
| return d.columns, nil | ||
| } | ||
|
|
||
| func (*DataRows) Err() error { | ||
| return nil | ||
| } |
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