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<?php
/*
* Copyright 2010-2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/*%******************************************************************************************%*/
// CLASS
/**
* Wraps the underlying `SimpleXMLIterator` class with enhancements for rapidly traversing the DOM tree,
* converting types, and comparisons.
*
* @version 2011.04.25
* @license See the included NOTICE.md file for more information.
* @copyright See the included NOTICE.md file for more information.
* @link http://aws.amazon.com/php/ PHP Developer Center
* @link http://php.net/SimpleXML SimpleXML
*/
class CFSimpleXML extends SimpleXMLIterator
{
/**
* Stores the namespace name to use in XPath queries.
*/
public $xml_ns;
/**
* Stores the namespace URI to use in XPath queries.
*/
public $xml_ns_url;
/**
* Catches requests made to methods that don't exist. Specifically, looks for child nodes via XPath.
*
* @param string $name (Required) The name of the method.
* @param array $arguments (Required) The arguments passed to the method.
* @return mixed Either an array of matches, or a single <CFSimpleXML> element.
*/
public function __call($name, $arguments)
{
// Remap $this
$self = $this;
// Re-base the XML
$self = new CFSimpleXML($self->asXML());
// Determine XPath query
$self->xpath_expression = 'descendant-or-self::' . $name;
// Get the results and augment with CFArray
$results = $self->xpath($self->xpath_expression);
if (!count($results)) return false;
$results = new CFArray($results);
// If an integer was passed, return only that result
if (isset($arguments[0]) && is_int($arguments[0]))
{
if (isset($results[$arguments[0]]))
{
return $results[$arguments[0]];
}
return false;
}
return $results;
}
/**
* Alternate approach to constructing a new instance. Supports chaining.
*
* @param string $data (Required) A well-formed XML string or the path or URL to an XML document if $data_is_url is <code>true</code>.
* @param integer $options (Optional) Used to specify additional LibXML parameters. The default value is <code>0</code>.
* @param boolean $data_is_url (Optional) Specify a value of <code>true</code> to specify that data is a path or URL to an XML document instead of string data. The default value is <code>false</code>.
* @param string $ns (Optional) The XML namespace to return values for.
* @param boolean $is_prefix (Optional) (No description provided by PHP.net.)
* @return CFSimpleXML Creates a new <CFSimpleXML> element.
*/
public static function init($data, $options = 0, $data_is_url, $ns, $is_prefix = false)
{
if (version_compare(PHP_VERSION, '5.3.0', '<'))
{
throw new Exception('PHP 5.3 or newer is required to instantiate a new class with CLASS::init().');
}
$self = get_called_class();
return new $self($data, $options, $data_is_url, $ns, $is_prefix);
}
/*%******************************************************************************************%*/
// TRAVERSAL
/**
* Wraps the results of an XPath query in a <CFArray> object.
*
* @param string $expr (Required) The XPath expression to use to query the XML response.
* @return CFArray A <CFArray> object containing the results of the XPath query.
*/
public function query($expr)
{
return new CFArray($this->xpath($expr));
}
/**
* Gets the parent or a preferred ancestor of the current element.
*
* @param string $node (Optional) Name of the ancestor element to match and return.
* @return CFSimpleXML A <CFSimpleXML> object containing the requested node.
*/
public function parent($node = null)
{
if ($node)
{
$parents = $this->xpath('ancestor-or-self::' . $node);
}
else
{
$parents = $this->xpath('parent::*');
}
return $parents[0];
}
/*%******************************************************************************************%*/
// ALTERNATE FORMATS
/**
* Gets the current XML node as a true string.
*
* @return string The current XML node as a true string.
*/
public function to_string()
{
return (string) $this;
}
/**
* Gets the current XML node as <CFArray>, a child class of PHP's <php:ArrayObject> class.
*
* @return CFArray The current XML node as a <CFArray> object.
*/
public function to_array()
{
return new CFArray(json_decode(json_encode($this), true));
}
/**
* Gets the current XML node as a stdClass object.
*
* @return array The current XML node as a stdClass object.
*/
public function to_stdClass()
{
return json_decode(json_encode($this));
}
/**
* Gets the current XML node as a JSON string.
*
* @return string The current XML node as a JSON string.
*/
public function to_json()
{
return json_encode($this);
}
/**
* Gets the current XML node as a YAML string.
*
* @return string The current XML node as a YAML string.
*/
public function to_yaml()
{
return sfYaml::dump(json_decode(json_encode($this), true), 5);
}
/*%******************************************************************************************%*/
// COMPARISONS
/**
* Whether or not the current node exactly matches the compared value.
*
* @param string $value (Required) The value to compare the current node to.
* @return boolean Whether or not the current node exactly matches the compared value.
*/
public function is($value)
{
return ((string) $this === $value);
}
/**
* Whether or not the current node contains the compared value.
*
* @param string $value (Required) The value to use to determine whether it is contained within the node.
* @return boolean Whether or not the current node contains the compared value.
*/
public function contains($value)
{
return (stripos((string) $this, $value) !== false);
}
}