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Diffstat (limited to 'framework/Xml/TXmlDocument.php')
| -rw-r--r-- | framework/Xml/TXmlDocument.php | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/framework/Xml/TXmlDocument.php b/framework/Xml/TXmlDocument.php new file mode 100644 index 00000000..fb73a9f5 --- /dev/null +++ b/framework/Xml/TXmlDocument.php @@ -0,0 +1,455 @@ +<?php +/** + * TXmlElement, TXmlDocument, TXmlElementList class file + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @link http://www.pradosoft.com/ + * @copyright Copyright © 2005 PradoSoft + * @license http://www.pradosoft.com/license/ + * @version $Revision: $ $Date: $ + * @package System.Xml + */ + +/** + * TXmlElement class. + * + * TXmlElement represents an XML element node. + * You can obtain its tagname, attributes, text between the openning and closing + * tags via the TagName, Attributes, and Value properties, respectively. + * You can also retrieve its parent and child elements by Parent and Elements + * properties, respectively. + * + * TBD: xpath + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Revision: $ $Date: $ + * @package System.Xml + * @since 3.0 + */ +class TXmlElement extends TComponent +{ + /** + * @var TXmlElement parent of this element + */ + private $_parent=null; + /** + * @var string tagname of this element + */ + private $_tagName; + /** + * @var string text enclosed between openning and closing tags of this element + */ + private $_value; + /** + * @var TXmlElementList list of child elements of this element + */ + private $_elements=null; + /** + * @var TMap attributes of this element + */ + private $_attributes=null; + + /** + * Constructor. + * @param string tagname for this element + */ + public function __construct($tagName) + { + $this->setTagName($tagName); + } + + /** + * @return TXmlElement parent element of this element + */ + public function getParent() + { + return $this->_parent; + } + + /** + * @param TXmlElement parent element of this element + */ + public function setParent($parent) + { + $this->_parent=$parent; + } + + /** + * @return string tagname of this element + */ + public function getTagName() + { + return $this->_tagName; + } + + /** + * @param string tagname of this element + */ + public function setTagName($tagName) + { + $this->_tagName=$tagName; + } + + /** + * @return string text enclosed between opening and closing tag of this element + */ + public function getValue() + { + return $this->_value; + } + + /** + * @param string text enclosed between opening and closing tag of this element + */ + public function setValue($value) + { + $this->_value=$value; + } + + /** + * @return boolean true if this element has child elements + */ + public function getHasElement() + { + return $this->_elements!==null && $this->_elements->getCount()>0; + } + + /** + * @return boolean true if this element has attributes + */ + public function getHasAttribute() + { + return $this->_attributes!==null && $this->_attributes->getCount()>0; + } + + /** + * @return string the attribute specified by the name, null if no such attribute + */ + public function getAttribute($name) + { + if($this->_attributes!==null) + return $this->_attributes->itemAt($name); + else + return null; + } + + /** + * @return TXmlElementList list of child elements + */ + public function getElements() + { + if(!$this->_elements) + $this->_elements=new TXmlElementList($this); + return $this->_elements; + } + + /** + * @return TMap list of attributes + */ + public function getAttributes() + { + if(!$this->_attributes) + $this->_attributes=new TMap; + return $this->_attributes; + } + + /** + * @return TXmlElement the first child element that has the specified tagname, null if not found + */ + public function getElementByTagName($tagName) + { + if($this->_elements) + { + foreach($this->_elements as $element) + if($element->_tagName===$tagName) + return $element; + } + return null; + } + + /** + * @return TList list of all child elements that have the specified tagname + */ + public function getElementsByTagName($tagName) + { + $list=new TList; + if($this->_elements) + { + foreach($this->_elements as $element) + if($element->_tagName===$tagName) + $list->add($element); + } + return $list; + } + + /** + * @return string string representation of this element + */ + public function toString($indent=0) + { + $attr=''; + if($this->_attributes!==null) + { + foreach($this->_attributes as $name=>$value) + $attr.=" $name=\"$value\""; + } + $prefix=str_repeat(' ',$indent*4); + if($this->getHasElement()) + { + $str=$prefix."<{$this->_tagName}$attr>\n"; + foreach($this->getElements() as $element) + $str.=$element->toString($indent+1)."\n"; + $str.=$prefix."</{$this->_tagName}>"; + return $str; + } + else if($this->getValue()!=='') + { + return $prefix."<{$this->_tagName}$attr>{$this->_value}</{$this->_tagName}>"; + } + else + return $prefix."<{$this->_tagName}$attr />"; + } +} + +/** + * TXmlDocument class. + * + * TXmlDocument represents a DOM representation of an XML file. + * Besides all properties and methods inherited from {@link TXmlElement}, + * you can load an XML file or string by {@link loadFromFile} or {@link loadFromString}. + * You can also get the version and encoding of the XML document by + * the Version and Encoding properties. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Revision: $ $Date: $ + * @package System.Xml + * @since 3.0 + */ +class TXmlDocument extends TXmlElement +{ + /** + * @var string version of this XML document + */ + private $_version; + /** + * @var string encoding of this XML document + */ + private $_encoding; + + /** + * Constructor. + * @param string version of this XML document + * @param string encoding of this XML document + */ + public function __construct($version='1.0',$encoding='') + { + parent::__construct(''); + $this->setversion($version); + $this->setEncoding($encoding); + } + + /** + * @return string version of this XML document + */ + public function getVersion() + { + return $this->_version; + } + + /** + * @param string version of this XML document + */ + public function setVersion($version) + { + $this->_version=$version; + } + + /** + * @return string encoding of this XML document + */ + public function getEncoding() + { + return $this->_encoding; + } + + /** + * @param string encoding of this XML document + */ + public function setEncoding($encoding) + { + $this->_encoding=$encoding; + } + + /** + * Loads and parses an XML document. + * @param string the XML file path + * @return boolean whether the XML file is parsed successfully + * @throws TIOException if the file fails to be opened. + */ + public function loadFromFile($file) + { + if(($str=@file_get_contents($file))!==false) + return $this->loadFromString($str); + else + throw new TIOException('xmldocument_file_read_failed',$file); + } + + /** + * Loads and parses an XML string. + * The version and encoding will be determined based on the parsing result. + * @param string the XML string + * @return boolean whether the XML string is parsed successfully + */ + public function loadFromString($string) + { + // TODO: since PHP 5.1, we can get parsing errors and throw them as exception + $doc=new DOMDocument(); + if($doc->loadXML($string)===false) + return false; + + $this->setEncoding($doc->encoding); + $this->setVersion($doc->version); + + $element=$doc->documentElement; + $this->setTagName($element->tagName); + $this->setValue($element->nodeValue); + $elements=$this->getElements(); + $attributes=$this->getAttributes(); + $elements->clear(); + $attributes->clear(); + foreach($element->attributes as $name=>$attr) + $attributes->add($name,$attr->value); + foreach($element->childNodes as $child) + { + if($child instanceof DOMElement) + $elements->add($this->buildElement($child)); + } + + return true; + } + + /** + * Saves this XML document as an XML file. + * @param string the name of the file to be stored with XML output + * @throws TIOException if the file cannot be written + */ + public function saveToFile($file) + { + if(($fw=fopen($file,'w'))!==false) + { + fwrite($fw,$this->saveToString()); + fclose($fw); + } + else + throw new TIOException('xmldocument_file_write_failed',$file); + } + + /** + * Saves this XML document as an XML string + * @return string the XML string of this XML document + */ + public function saveToString() + { + $version=empty($this->_version)?' version="1.0"':' version="'.$this->_version.'"'; + $encoding=empty($this->_encoding)?'':' encoding="'.$this->_encoding.'"'; + return "<?xml{$version}{$encoding}?>\n".$this->toString(0); + } + + /** + * Recursively converts DOM XML nodes into TXmlElement + * @param DOMXmlNode the node to be converted + * @return TXmlElement the converted TXmlElement + */ + private function buildElement($node) + { + $element=new TXmlElement($node->tagName); + $element->setValue($node->nodeValue); + foreach($node->attributes as $name=>$attr) + $element->getAttributes()->add($name,$attr->value); + foreach($node->childNodes as $child) + { + if($child instanceof DOMElement) + $element->getElements()->add($this->buildElement($child)); + } + return $element; + } +} + + +/** + * TXmlElement class. + * + * TXmlElement represents an XML element node. + * You can obtain its tagname, attributes, text between the openning and closing + * tags via the TagName, Attributes, and Value properties, respectively. + * You can also retrieve its parent and child elements by Parent and Elements + * properties, respectively. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Revision: $ $Date: $ + * @package System.Xml + * @since 3.0 + */ +class TXmlElementList extends TList +{ + /** + * @var TXmlElement owner of this list + */ + private $_o; + + /** + * Constructor. + * @param TXmlElement owner of this list + */ + public function __construct(TXmlElement $owner) + { + $this->_o=$owner; + } + + /** + * @return TXmlElement owner of this list + */ + protected function getOwner() + { + return $this->_o; + } + + + /** + * Inserts an item at the specified position. + * This overrides the parent implementation by performing additional + * operations for each newly added TXmlElement object. + * @param integer the speicified position. + * @param mixed new item + * @throws TInvalidDataTypeException if the item to be inserted is not a TXmlElement object. + */ + public function insertAt($index,$item) + { + if($item instanceof TXmlElement) + { + parent::insertAt($index,$item); + if($item->getParent()!==null) + $item->getParent()->getElements()->remove($item); + $item->setParent($this->_o); + } + else + throw new TInvalidDataTypeException('xmlelementlist_xmlelement_required'); + } + + /** + * Removes an item at the specified position. + * This overrides the parent implementation by performing additional + * cleanup work when removing a TXmlElement object. + * @param integer the index of the item to be removed. + * @return mixed the removed item. + */ + public function removeAt($index) + { + $item=parent::removeAt($index); + if($item instanceof TXmlElement) + $item->setParent(null); + return $item; + } +} + +?>
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