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90 lines
2.6 KiB
90 lines
2.6 KiB
// Copyright 2012-present Oliver Eilhard. All rights reserved. |
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// Use of this source code is governed by a MIT-license. |
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// See http://olivere.mit-license.org/license.txt for details. |
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package elastic |
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import ( |
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"net/url" |
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"strings" |
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) |
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// FetchSourceContext enables source filtering, i.e. it allows control |
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// over how the _source field is returned with every hit. It is used |
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// with various endpoints, e.g. when searching for documents, retrieving |
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// individual documents, or even updating documents. |
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// |
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// See https://www.elastic.co/guide/en/elasticsearch/reference/5.5/search-request-source-filtering.html |
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// for details. |
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type FetchSourceContext struct { |
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fetchSource bool |
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includes []string |
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excludes []string |
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} |
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// NewFetchSourceContext returns a new FetchSourceContext. |
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func NewFetchSourceContext(fetchSource bool) *FetchSourceContext { |
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return &FetchSourceContext{ |
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fetchSource: fetchSource, |
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includes: make([]string, 0), |
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excludes: make([]string, 0), |
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} |
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} |
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// FetchSource indicates whether to return the _source. |
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func (fsc *FetchSourceContext) FetchSource() bool { |
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return fsc.fetchSource |
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} |
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// SetFetchSource specifies whether to return the _source. |
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func (fsc *FetchSourceContext) SetFetchSource(fetchSource bool) { |
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fsc.fetchSource = fetchSource |
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} |
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// Include indicates to return specific parts of the _source. |
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// Wildcards are allowed here. |
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func (fsc *FetchSourceContext) Include(includes ...string) *FetchSourceContext { |
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fsc.includes = append(fsc.includes, includes...) |
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return fsc |
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} |
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// Exclude indicates to exclude specific parts of the _source. |
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// Wildcards are allowed here. |
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func (fsc *FetchSourceContext) Exclude(excludes ...string) *FetchSourceContext { |
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fsc.excludes = append(fsc.excludes, excludes...) |
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return fsc |
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} |
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// Source returns the JSON-serializable data to be used in a body. |
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func (fsc *FetchSourceContext) Source() (interface{}, error) { |
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if !fsc.fetchSource { |
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return false, nil |
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} |
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if len(fsc.includes) == 0 && len(fsc.excludes) == 0 { |
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return true, nil |
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} |
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src := make(map[string]interface{}) |
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if len(fsc.includes) > 0 { |
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src["includes"] = fsc.includes |
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} |
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if len(fsc.excludes) > 0 { |
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src["excludes"] = fsc.excludes |
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} |
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return src, nil |
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} |
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// Query returns the parameters in a form suitable for a URL query string. |
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func (fsc *FetchSourceContext) Query() url.Values { |
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params := url.Values{} |
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if fsc.fetchSource { |
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if len(fsc.includes) > 0 { |
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params.Add("_source_include", strings.Join(fsc.includes, ",")) |
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} |
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if len(fsc.excludes) > 0 { |
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params.Add("_source_exclude", strings.Join(fsc.excludes, ",")) |
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} |
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} else { |
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params.Add("_source", "false") |
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} |
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return params |
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}
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