/**
* Builder method for returning a Zend_Search_Lucene_Field object based on
* the DataObject field.
*
* If the SilverStripe database field is a Date or a descendant of Date,
* stores the date as a Unix timestamp. Make sure your timezone is set
* correctly!
*
* Keyword - Data that is searchable and stored in the index, but not
* broken up into tokens for indexing. This is useful for being
* able to search on non-textual data such as IDs or URLs.
*
* UnIndexed – Data that isn’t available for searching, but is stored
* with our document (eg. article teaser, article URL and timestamp
* of creation)
*
* UnStored – Data that is available for search, but isn’t stored in
* the index in full (eg. the document content)
*
* Text – Data that is available for search and is stored in full
* (eg. title and author)
*
* @access private
* @param DataObject $object The DataObject from which to extract a
* Zend field.
* @param String $fieldName The name of the field to fetch a Zend field for.
* @return Zend_Search_Lucene_Field
*/
private static function getZendField($object, $fieldName)
{
$encoding = ZendSearchLuceneSearchable::$encoding;
$config = $object->getLuceneFieldConfig($fieldName);
// Recurses through dot-notation.
$value = self::getFieldValue($object, $fieldName);
if ($config['content_filter']) {
// Run through the content filter, if we have one.
$value = call_user_func($config['content_filter'], $value);
}
if ($config['name']) {
$fieldName = $config['name'];
}
if ($config['type'] == 'text') {
return Zend_Search_Lucene_Field::Text($fieldName, $value, $encoding);
}
if ($config['type'] == 'unindexed') {
return Zend_Search_Lucene_Field::UnIndexed($fieldName, $value, $encoding);
}
if ($config['type'] == 'keyword') {
$keywordFieldName = $fieldName;
if ($keywordFieldName == 'ID') {
$keywordFieldName = 'ObjectID';
}
// Don't use 'ID' as it's used by Zend Lucene
return Zend_Search_Lucene_Field::Keyword($keywordFieldName, $value, $encoding);
}
// Default - index and store as unstored
return Zend_Search_Lucene_Field::UnStored($fieldName, $value, $encoding);
}
