80 lines
2.5 KiB
Go
80 lines
2.5 KiB
Go
// Copyright (c) 2014 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 shredder
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import (
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"bytes"
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"github.com/couchbaselabs/bleve/analysis"
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"github.com/couchbaselabs/bleve/document"
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"github.com/dustin/go-jsonpointer"
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)
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// A simple automatic JSON shredder which parses the whole document body.
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// Any strings found in the JSON are added as text fields
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type JsonPointerShredder struct {
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fieldPaths map[string]string
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paths []string
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analyzers map[string]*analysis.Analyzer
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options map[string]document.IndexingOptions
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}
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func NewJsonPointerShredder() *JsonPointerShredder {
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return &JsonPointerShredder{
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fieldPaths: make(map[string]string),
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paths: make([]string, 0),
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analyzers: make(map[string]*analysis.Analyzer),
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options: make(map[string]document.IndexingOptions),
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}
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}
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func (s *JsonPointerShredder) AddTextField(name string, path string) {
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s.fieldPaths[name] = path
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s.paths = append(s.paths, path)
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}
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func (s *JsonPointerShredder) AddFieldCustom(name string, path string, options document.IndexingOptions, analyzer *analysis.Analyzer) {
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s.fieldPaths[name] = path
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s.analyzers[name] = analyzer
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s.options[name] = options
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s.paths = append(s.paths, path)
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}
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func (s *JsonPointerShredder) Shred(id string, body []byte) (*document.Document, error) {
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rv := document.NewDocument(id)
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values, err := jsonpointer.FindMany(body, s.paths)
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if err != nil {
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return nil, err
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}
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for fieldName, fieldPath := range s.fieldPaths {
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fieldValue := bytes.TrimSpace(values[fieldPath])
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if bytes.HasPrefix(fieldValue, []byte{'"'}) {
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fieldValue = fieldValue[1:]
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}
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if bytes.HasSuffix(fieldValue, []byte{'"'}) {
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fieldValue = fieldValue[:len(fieldValue)-1]
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}
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analyzer, custom := s.analyzers[fieldName]
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if custom {
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options := s.options[fieldName]
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field := document.NewTextFieldCustom(fieldName, fieldValue, options, analyzer)
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rv.AddField(field)
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} else {
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field := document.NewTextField(fieldName, fieldValue)
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rv.AddField(field)
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}
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}
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return rv, nil
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}
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