/**
* Reads a dictionary and then translates the words in an input text
* word-by-word, printing the result on the output stream.
* The dictionary consists of pairs of words.
* The first element of each pair is a word in source language.
* The second element of each pair is the word in the target language.
* Uses a search tree.
*
* @param resource $dictionary An input stream
* from which the pairs of words are read.
* @param resource $in The input stream to be translated.
* @param resource $out The output stream on which to print the translation.
*/
public static function translate($dictionary, $in, $out)
{
$searchTree = new AVLTree();
while (($line = fgets($dictionary)) != false) {
$line = preg_replace('/\\n$/', '', $line);
list($key, $value) = preg_split('/[ \\t]+/', $line, 2);
$searchTree->insert(new Association(box($key), box($value)));
}
while (($line = fgets($in)) != false) {
$words = preg_split('/[ \\t\\n]+/', $line, -1, PREG_SPLIT_NO_EMPTY);
foreach ($words as $word) {
$obj = $searchTree->find(new Association(box($word)));
if ($obj === NULL) {
fprintf($out, "%s ", $word);
} else {
fprintf($out, "%s ", str($obj->getValue()));
}
}
}
}
