implement Zend indexer as singleton in SeedDMS_Lucene_Indexer

SeedDMS_Lucene/Lucene/Indexer.php

@@ -29,10 +29,23 @@ class SeedDMS_Lucene_Indexer {
 	 */
 	protected $indexname;
 
+	/**
+	 * @var string $index lucene index
+	 * @access protected
+	 */
+	protected $index;
+
+	public function __construct($index) {
+		$this->index = $index;
+	}
+
 	static function open($conf) { /* {{{ */
 		try {
 			$index = Zend_Search_Lucene::open($conf['indexdir']);
-			return($index);
+			if($index)
+				return new self($index);
+			else
+				return null;
 		} catch (Exception $e) {
 			return null;
 		}
@@ -41,7 +54,10 @@ class SeedDMS_Lucene_Indexer {
 	static function create($conf) { /* {{{ */
 		try {
 			$index = Zend_Search_Lucene::create($conf['indexdir']);
-			return($index);
+			if($index)
+				return new self($index);
+			else
+				return null;
 		} catch (Exception $e) {
 			return null;
 		}
@@ -62,6 +78,131 @@ class SeedDMS_Lucene_Indexer {
 		Zend_Search_Lucene_Analysis_Analyzer::setDefault($analyzer);
 	} /* }}} */
 
+	/**
+	 * Add document to index
+	 *
+	 * @param object $doc indexed document of class 
+	 * SeedDMS_Lucene_IndexedDocument
+	 * @return boolean false in case of an error, otherwise true
+	 */
+	function addDocument($doc) { /* {{{ */
+		if(!$this->index)
+			return false;
 
+		return $this->index->addDocument($doc);
+	} /* }}} */
+
+	/**
+	 * Remove document from index
+	 *
+	 * @param object $id internal id of document
+	 * @return boolean false in case of an error, otherwise true
+	 */
+	public function delete($id) { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->delete($id);
+	} /* }}} */
+
+	/**
+	 * Check if document was deleted
+	 *
+	 * @param object $id internal id of document
+	 * @return boolean true if document was deleted
+	 */
+	public function isDeleted($id) { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->isDeleted($id);
+	} /* }}} */
+
+	/**
+	 * Search in index
+	 *
+	 * @param string $query
+	 * @return array result
+	 */
+	public function find($query) { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->find($query);
+	} /* }}} */
+
+	/**
+	 * Get a single document from index
+	 *
+	 * @param string $id id of document
+	 * @return boolean false in case of an error, otherwise true
+	 */
+	public function findById($id) { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->findById($id);
+	} /* }}} */
+
+	/**
+	 * Get a single document from index
+	 *
+	 * @param integer $id id of index record
+	 * @return boolean false in case of an error, otherwise true
+	 */
+	public function getDocument($id, $content=true) { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->getDocument($id);
+	} /* }}} */
+
+	/**
+	 * Return list of terms in index
+	 *
+	 * @return array list of Zend_Lucene_Term
+	 */
+	public function terms($prefix='', $col='') { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->terms();
+	} /* }}} */
+
+	/**
+	 * Return number of documents in index
+	 *
+	 * @return interger number of documents
+	 */
+	public function count() { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->count();
+	} /* }}} */
+
+	/**
+	 * Commit changes
+	 *
+	 * This function does nothing!
+	 */
+	function commit() { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->commit();
+	} /* }}} */
+
+	/**
+	 * Optimize index
+	 *
+	 * This function does nothing!
+	 */
+	function optimize() { /* {{{ */
+		if(!$this->index)
+			return false;
+
+		return $this->index->optimize();
+	} /* }}} */
 }
 ?>