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WhitespaceTokenizer.php
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WhitespaceTokenizer.php
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<?php
/**
* Copyright (c) 2008-2011 Andreas Heigl<andreas@heigl.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @category Hyphenation
* @package Org_Heigl_Hyphenator
* @subpackage Tokenizer
* @author Andreas Heigl <andreas@heigl.org>
* @copyright 2008-2011 Andreas Heigl<andreas@heigl.org>
* @license http://www.opensource.org/licenses/mit-license.php MIT-License
* @version 2.0.1
* @link http://github.com/heiglandreas/Hyphenator
* @since 11.11.2011
*/
namespace Org\Heigl\Hyphenator\Tokenizer;
/**
* Use Whitespace to split any input into tokens
*
* @category Hyphenation
* @package Org_Heigl_Hyphenator
* @subpackage Tokenizer
* @author Andreas Heigl <andreas@heigl.org>
* @copyright 2008-2011 Andreas Heigl<andreas@heigl.org>
* @license http://www.opensource.org/licenses/mit-license.php MIT-License
* @version 2.0.1
* @link http://github.com/heiglandreas/Hyphenator
* @since 04.11.2011
*/
class WhitespaceTokenizer implements Tokenizer
{
/**
* Split the given input into tokens using whitespace as splitter
*
* The input can be a string or a tokenRegistry. If the input is a
* TokenRegistry, each item will be tokenized.
*
* @param string|\Org\Heigl\Hyphenator\Tokenizer\TokenRegistry $input The
* input to be tokenized
*
* @return \Org\Heigl\Hyphenator\Tokenizer\TokenRegistry
*/
public function run($input)
{
if ( $input instanceof TokenRegistry ) {
// Tokenize a TokenRegistry
foreach ( $input as $token ) {
if ( $token instanceof WhitespaceToken ) {
continue;
}
$newTokens = $this->_tokenize($token->get());
if ( $newTokens == array($token) ) {
continue;
}
$input->replace($token, $newTokens);
}
return $input ;
}
// Tokenize a simple string.
$array = $this->_tokenize($input);
$registry = new TokenRegistry();
foreach ( $array as $item ) {
$registry->add($item);
}
return $registry;
}
/**
* Split the given string into tokens using whitespace.
*
* Each whitespace is placed in a WhitespaceToken and everything else is
* placed in a WordToken-Object
*
* @param string $input The String to tokenize
*
* @return Token
*/
protected function _tokenize($input)
{
$tokens = array ();
$splits = preg_split('/([\s]+)/u', $input, -1, PREG_SPLIT_DELIM_CAPTURE);
foreach ( $splits as $split ) {
if ( '' == trim($split)) {
$tokens[] = new WhitespaceToken($split);
continue;
}
$tokens[] = new WordToken($split);
}
return $tokens;
}
}