Diffs

IgnoreExceptionIterator/tags/0.1.3-stable/IgnoreExceptionIterator.php

@@ -0,0 +1,54 @@
+<?php
+
+  /**
+   * IgnoreExceptionIterator - 既存のイテレータの例外を無視するイテレータ
+   *
+   * @package  IgnoreExceptionIterator
+   * @author  Yoshio HANAWA <y@hnw.jp>
+   * @copyright  2009 Yoshio HANAWA
+   * @license  http://creativecommons.org/licenses/BSD/    New BSD Licence
+   * @link  http://openpear.org/package/IgnoreExceptionIterator
+   */
+
+class IgnoreExceptionIterator implements OuterIterator
+{
+  protected $it;
+  protected $already_caught_exception = false;
+
+  public function __construct(Traversable $it)
+  {
+    if ($it instanceof IteratorAggregate) {
+      $it = $iterator->getIterator();
+    }
+    if ($it instanceof Iterator) {
+      $this->it = $it;
+    } else {
+      throw new Exception("Only Traversable class can be wrapped by IgnoreExceptionIterator.");
+    }
+  }
+  public function getInnerIterator()
+  {
+    return $this->it;
+  }
+  public function current() { return $this->__call("current"); }
+  public function key()     { return $this->__call("key"); }
+  public function next()    { return $this->__call("next"); }
+  public function rewind()  { return $this->__call("rewind"); }
+  public function valid()   { return $this->__call("valid"); }
+
+  public function __call($method, $params = array())
+  {
+    if (!$this->already_caught_exception) {
+      try {
+        $ret = call_user_func_array(array($this->it, $method), $params);
+      } catch (Exception $e) {
+        // ignore exception
+        $this->already_caught_exception = true;
+      }
+    }
+    if ($this->already_caught_exception) {
+      $ret = ($method === "valid") ? false :  null;
+    }
+    return $ret;
+  }
+}