82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
// Copyright (c) 2017 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package zap
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import (
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"encoding/binary"
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"fmt"
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"math"
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"github.com/blevesearch/bleve/index/scorch/segment/zap"
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"github.com/couchbase/vellum"
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"github.com/spf13/cobra"
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)
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// dictCmd represents the dict command
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var dictCmd = &cobra.Command{
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Use: "dict [path] [field]",
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Short: "dict prints the term dictionary for the specified field",
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Long: `The dict command lets you print the term dictionary for the specified field.`,
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RunE: func(cmd *cobra.Command, args []string) error {
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if len(args) < 2 {
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return fmt.Errorf("must specify field")
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}
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data := segment.Data()
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addr, err := segment.DictAddr(args[1])
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if err != nil {
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return fmt.Errorf("error determing address: %v", err)
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}
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fmt.Printf("dictionary for field starts at %d (%x)\n", addr, addr)
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vellumLen, read := binary.Uvarint(data[addr : addr+binary.MaxVarintLen64])
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fmt.Printf("vellum length: %d\n", vellumLen)
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fstBytes := data[addr+uint64(read) : addr+uint64(read)+vellumLen]
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fmt.Printf("raw vellum data % x\n", fstBytes)
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fmt.Printf("dictionary:\n\n")
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if fstBytes != nil {
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fst, err := vellum.Load(fstBytes)
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if err != nil {
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return fmt.Errorf("dictionary field %s vellum err: %v", args[1], err)
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}
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itr, err := fst.Iterator(nil, nil)
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for err == nil {
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currTerm, currVal := itr.Current()
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extra := ""
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if currVal&zap.FSTValEncodingMask == zap.FSTValEncoding1Hit {
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docNum, normBits := zap.FSTValDecode1Hit(currVal)
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norm := math.Float32frombits(uint32(normBits))
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extra = fmt.Sprintf("-- docNum: %d, norm: %f", docNum, norm)
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}
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fmt.Printf("%s - %d (%x) %s\n", currTerm, currVal, currVal, extra)
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err = itr.Next()
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}
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if err != nil && err != vellum.ErrIteratorDone {
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return fmt.Errorf("error iterating dictionary: %v", err)
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}
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}
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return nil
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},
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}
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func init() {
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RootCmd.AddCommand(dictCmd)
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}
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