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<?php
namespace Elastica\Suggest\CandidateGenerator;
/**
* Class DirectGenerator.
*
* @link http://www.elastic.co/guide/en/elasticsearch/reference/current/search-suggesters-phrase.html#_direct_generators
*/
class DirectGenerator extends AbstractCandidateGenerator
{
const SUGGEST_MODE_MISSING = 'missing';
const SUGGEST_MODE_POPULAR = 'popular';
const SUGGEST_MODE_ALWAYS = 'always';
/**
* @param string $field
*/
public function __construct($field)
{
$this->setField($field);
}
/**
* Set the field name from which to fetch candidate suggestions.
*
* @param string $field
*
* @return $this
*/
public function setField($field)
{
return $this->setParam('field', $field);
}
/**
* Set the maximum corrections to be returned per suggest text token.
*
* @param int $size
*
* @return $this
*/
public function setSize($size)
{
return $this->setParam('size', $size);
}
/**
* @param string $mode see SUGGEST_MODE_* constants for options
*
* @return $this
*/
public function setSuggestMode($mode)
{
return $this->setParam('suggest_mode', $mode);
}
/**
* @param int $max can only be a value between 1 and 2. Defaults to 2.
*
* @return $this
*/
public function setMaxEdits($max)
{
return $this->setParam('max_edits', $max);
}
/**
* @param int $length defaults to 1
*
* @return $this
*/
public function setPrefixLength($length)
{
return $this->setParam('prefix_len', $length);
}
/**
* @param int $min defaults to 4
*
* @return $this
*/
public function setMinWordLength($min)
{
return $this->setParam('min_word_len', $min);
}
/**
* @param int $max
*
* @return $this
*/
public function setMaxInspections($max)
{
return $this->setParam('max_inspections', $max);
}
/**
* @param float $min
*
* @return $this
*/
public function setMinDocFrequency($min)
{
return $this->setParam('min_doc_freq', $min);
}
/**
* @param float $max
*
* @return $this
*/
public function setMaxTermFrequency($max)
{
return $this->setParam('max_term_freq', $max);
}
/**
* Set an analyzer to be applied to the original token prior to candidate generation.
*
* @param string $pre an analyzer
*
* @return $this
*/
public function setPreFilter($pre)
{
return $this->setParam('pre_filter', $pre);
}
/**
* Set an analyzer to be applied to generated tokens before they are passed to the phrase scorer.
*
* @param string $post
*
* @return $this
*/
public function setPostFilter($post)
{
return $this->setParam('post_filter', $post);
}
}
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