83 lines
2.6 KiB
Go
83 lines
2.6 KiB
Go
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// Copyright 2014 Google Inc. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package search
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// Field is a name/value pair. A search index's document can be loaded and
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// saved as a sequence of Fields.
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type Field struct {
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// Name is the field name. A valid field name matches /[A-Za-z][A-Za-z0-9_]*/.
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Name string
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// Value is the field value. The valid types are:
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// - string,
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// - search.Atom,
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// - search.HTML,
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// - time.Time (stored with millisecond precision),
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// - float64,
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// - GeoPoint.
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Value interface{}
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// Language is a two-letter ISO 639-1 code for the field's language,
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// defaulting to "en" if nothing is specified. It may only be specified for
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// fields of type string and search.HTML.
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Language string
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// Derived marks fields that were calculated as a result of a
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// FieldExpression provided to Search. This field is ignored when saving a
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// document.
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Derived bool
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}
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// Facet is a name/value pair which is used to add categorical information to a
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// document.
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type Facet struct {
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// Name is the facet name. A valid facet name matches /[A-Za-z][A-Za-z0-9_]*/.
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// A facet name cannot be longer than 500 characters.
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Name string
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// Value is the facet value.
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//
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// When being used in documents (for example, in
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// DocumentMetadata.Facets), the valid types are:
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// - search.Atom,
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// - float64.
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//
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// When being used in SearchOptions.Refinements or being returned
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// in FacetResult, the valid types are:
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// - search.Atom,
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// - search.Range.
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Value interface{}
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}
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// DocumentMetadata is a struct containing information describing a given document.
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type DocumentMetadata struct {
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// Rank is an integer specifying the order the document will be returned in
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// search results. If zero, the rank will be set to the number of seconds since
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// 2011-01-01 00:00:00 UTC when being Put into an index.
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Rank int
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// Facets is the set of facets for this document.
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Facets []Facet
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}
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// FieldLoadSaver can be converted from and to a slice of Fields
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// with additional document metadata.
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type FieldLoadSaver interface {
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Load([]Field, *DocumentMetadata) error
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Save() ([]Field, *DocumentMetadata, error)
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}
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// FieldList converts a []Field to implement FieldLoadSaver.
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type FieldList []Field
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// Load loads all of the provided fields into l.
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// It does not first reset *l to an empty slice.
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func (l *FieldList) Load(f []Field, _ *DocumentMetadata) error {
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*l = append(*l, f...)
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return nil
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}
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// Save returns all of l's fields as a slice of Fields.
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func (l *FieldList) Save() ([]Field, *DocumentMetadata, error) {
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return *l, nil, nil
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}
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var _ FieldLoadSaver = (*FieldList)(nil)
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