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| </pre><pre class="rust"><code><span class="kw">use </span>serde::{Deserialize, Serialize}; |
| |
| <span class="doccomment">/// `IndexRecordOption` describes an amount information associated |
| /// with a given indexed field. |
| /// |
| /// It is both used to: |
| /// |
| /// * describe in the schema the amount of information that should be retained during indexing (See |
| /// [`TextFieldIndexing::set_index_option()`](crate::schema::TextFieldIndexing::set_index_option)) |
| /// * request that a given amount of information to be decoded as one goes through a posting list. |
| /// (See [`InvertedIndexReader::read_postings()`](crate::InvertedIndexReader::read_postings)) |
| </span><span class="attribute">#[derive(Clone, Copy, Debug, PartialEq, PartialOrd, Ord, Eq, Hash, Serialize, Deserialize)] |
| </span><span class="kw">pub enum </span>IndexRecordOption { |
| <span class="doccomment">/// records only the `DocId`s |
| </span><span class="attribute">#[serde(rename = <span class="string">"basic"</span>)] |
| </span>Basic, |
| <span class="doccomment">/// records the document ids as well as the term frequency. |
| /// The term frequency can help giving better scoring of the documents. |
| </span><span class="attribute">#[serde(rename = <span class="string">"freq"</span>)] |
| </span>WithFreqs, |
| <span class="doccomment">/// records the document id, the term frequency and the positions of |
| /// the occurrences in the document. |
| /// Positions are required to run a [`PhraseQuery`](crate::query::PhraseQuery). |
| </span><span class="attribute">#[serde(rename = <span class="string">"position"</span>)] |
| </span>WithFreqsAndPositions, |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>IndexRecordOption { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| IndexRecordOption::Basic |
| } |
| } |
| |
| <span class="kw">impl </span>IndexRecordOption { |
| <span class="doccomment">/// Returns true if this option includes encoding |
| /// term frequencies. |
| </span><span class="kw">pub fn </span>has_freq(<span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="self">self </span>{ |
| IndexRecordOption::Basic => <span class="bool-val">false</span>, |
| IndexRecordOption::WithFreqs | IndexRecordOption::WithFreqsAndPositions => <span class="bool-val">true</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Returns true if this option include encoding |
| /// term positions. |
| </span><span class="kw">pub fn </span>has_positions(<span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="self">self </span>{ |
| IndexRecordOption::Basic | IndexRecordOption::WithFreqs => <span class="bool-val">false</span>, |
| IndexRecordOption::WithFreqsAndPositions => <span class="bool-val">true</span>, |
| } |
| } |
| } |
| </code></pre></div> |
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