120 lines
2.6 KiB
Go
120 lines
2.6 KiB
Go
// Copyright (c) 2015 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package firestorm
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"github.com/blevesearch/bleve/index/store"
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"github.com/golang/protobuf/proto"
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)
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var FieldKeyPrefix = []byte{'f'}
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func (f *Firestorm) fieldIndexOrNewRow(name string) (uint16, *FieldRow) {
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index, existed := f.fieldCache.FieldNamed(name, true)
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if !existed {
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return index, NewFieldRow(uint16(index), name)
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}
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return index, nil
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}
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func (f *Firestorm) loadFields(reader store.KVReader) (err error) {
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err = visitPrefix(reader, FieldKeyPrefix, func(key, val []byte) (bool, error) {
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fieldRow, err := NewFieldRowKV(key, val)
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if err != nil {
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return false, err
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}
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f.fieldCache.AddExisting(fieldRow.Name(), fieldRow.Index())
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return true, nil
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})
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return
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}
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type FieldRow struct {
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index uint16
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value FieldValue
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}
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func NewFieldRow(i uint16, name string) *FieldRow {
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rv := FieldRow{
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index: i,
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}
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rv.value.Name = proto.String(name)
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return &rv
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}
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func NewFieldRowKV(key, value []byte) (*FieldRow, error) {
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rv := FieldRow{}
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buf := bytes.NewBuffer(key)
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_, err := buf.ReadByte() // type
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if err != nil {
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return nil, err
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}
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err = binary.Read(buf, binary.LittleEndian, &rv.index)
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if err != nil {
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return nil, err
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}
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err = rv.value.Unmarshal(value)
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if err != nil {
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return nil, err
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}
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return &rv, nil
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}
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func (fr *FieldRow) KeySize() int {
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return 3
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}
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func (fr *FieldRow) KeyTo(buf []byte) (int, error) {
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buf[0] = 'f'
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binary.LittleEndian.PutUint16(buf[1:3], fr.index)
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return 3, nil
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}
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func (fr *FieldRow) Key() []byte {
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buf := make([]byte, fr.KeySize())
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n, _ := fr.KeyTo(buf)
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return buf[:n]
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}
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func (fr *FieldRow) ValueSize() int {
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return fr.value.Size()
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}
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func (fr *FieldRow) ValueTo(buf []byte) (int, error) {
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return fr.value.MarshalTo(buf)
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}
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func (fr *FieldRow) Value() []byte {
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buf := make([]byte, fr.ValueSize())
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n, _ := fr.ValueTo(buf)
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return buf[:n]
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}
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func (fr *FieldRow) Index() uint16 {
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return fr.index
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}
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func (fr *FieldRow) Name() string {
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return fr.value.GetName()
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}
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func (fr *FieldRow) String() string {
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return fmt.Sprintf("FieldRow - Field: %d - Name: %s\n", fr.index, fr.Name())
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}
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