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/*
Action script 2.0 RSS parser package
Copyright (C) 2006 Cybozu Labs, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
class: com.cybozuLab.rssParser.ParsingRss
version: 0.1
Last-modified: 01/Feb/2006
Parsing RSS 2.0 feed for Action Script 2.0
*/
import com.cybozuLab.rssParser.*;
class com.cybozuLab.rssParser.ParsingRss
{
private static var DEBUG:Boolean = false;
private var targetRssXml:XMLNode; //rss feed XML Node tree
private var errorMessage:String;
private var parsedRssObj:Object;
private var parsedRssChannelObj:Object;
private var parsedRssItemObj:Array;
private var isInRssTag:Boolean;
private var isInChannelTag:Boolean;
private var isInItemTag:Boolean;
private var currentChannelNum:Number;
private var currentItemNum:Number;
private var channelStackArray:Array;
private var itemStackArray:Array;
private var nodeObjStack:Array;
/*
function: ParsingRss
constructor
*/
public function ParsingRss ( sourceData:XMLNode )
{
if( sourceData == undefined )
{
errorMessage = "Parsing Error : Called without source data.";
throw new RssParserException( errorMessage );
}
targetRssXml = sourceData;
isInRssTag = false;
isInChannelTag = false;
isInItemTag = false;
currentItemNum = 0;
channelStackArray = new Array();
itemStackArray = new Array();
parsedRssObj = new Object();
parsedRssChannelObj = new Object();
parsedRssItemObj = new Array();
parseRss( targetRssXml );
parsedRssObj["channel"] = parsedRssChannelObj;
parsedRssObj["channel"]["item"] = parsedRssItemObj;
}
public function getRssObject():Object
{
return parsedRssObj;
}
public function traceRssObject():Void
{
Utils.traceObj( parsedRssObj );
}
private function parseRss( currentNode:XMLNode ):Void
{
for ( var aNode:XMLNode = currentNode; aNode != null; aNode = aNode.nextSibling )
{
if( isInItemTag )
{
itemStackArray.unshift( aNode.nodeName );
}
else if( isInChannelTag )
{
channelStackArray.unshift( aNode.nodeName );
}
/*
Parse attributes.
*/
if( ! isInRssTag
&& aNode.nodeName.toLowerCase() == "rss"
&& Utils.countProperty( aNode.attributes ) >0 )
{
nodeObjStack = Array();
appendAttribute( parsedRssObj, aNode.attributes );
}
else if( isInItemTag
&& Utils.countProperty( aNode.attributes) >0 )
{
nodeObjStack = itemStackArray.slice( 0 );
appendAttribute( parsedRssItemObj[ currentItemNum ], aNode.attributes );
}
else if( isInChannelTag
&& Utils.countProperty( aNode.attributes ) >0 )
{
nodeObjStack = channelStackArray.slice( 0 );
appendAttribute( parsedRssChannelObj, aNode.attributes );
}
/*
Parse child node or data.
*/
if( ! isInRssTag
&& aNode.nodeName.toLowerCase() == "rss" )
{
isInRssTag = true;
parseRss(aNode.firstChild);
isInRssTag = false;
}
else if( ! isInChannelTag
&& aNode.nodeName.toLowerCase() == "channel" )
{
isInChannelTag = true;
parseRss(aNode.firstChild);
isInChannelTag = false;
currentChannelNum++;
}
else if( ! isInItemTag
&& channelStackArray.length == 1
&& aNode.nodeName.toLowerCase() == "item" )
{
isInItemTag = true;
parsedRssItemObj[ currentItemNum ] = new Object();
parseRss(aNode.firstChild);
isInItemTag = false;
currentItemNum++;
}
else if( aNode.firstChild.nodeType == 1 )
{
parseRss( aNode.firstChild );
}
else if( aNode.firstChild.nodeType == 3 )
{
if( isInItemTag )
{
nodeObjStack = itemStackArray.slice( 0 );
appendNodeValue( parsedRssItemObj[ currentItemNum ], aNode.firstChild.nodeValue );
}
else if( isInChannelTag )
{
nodeObjStack = channelStackArray.slice( 0 );
appendNodeValue( parsedRssChannelObj, aNode.firstChild.nodeValue );
}
else
{
trace("no rss value : "+ aNode.firstChild.nodeValue);
}
}
if( isInItemTag )
{
itemStackArray.shift( );
}
else if( isInChannelTag )
{
channelStackArray.shift( );
}
} // close for loop
} // close function
private function appendNodeValue( nodeObj:Object, nodeValue:String )
{
if( nodeObjStack.length > 0 )
{
var key = nodeObjStack.pop();
if( nodeObj[ key ] == undefined )
{
nodeObj[ key ] = new Object();
if( key != key.toLowerCase() )
{
nodeObj[ key.toLowerCase() ] = new Object();
}
}
appendNodeValue( nodeObj[ key ], nodeValue );
if( key != key.toLowerCase() )
{
appendNodeValue( nodeObj[ key.toLowerCase() ], nodeValue );
}
}
else
{
nodeObj["value"] = nodeValue;
}
}
private function appendAttribute( nodeObj:Object, attributes:Object )
{
if( nodeObjStack.length > 0 )
{
var key = nodeObjStack.pop();
if( nodeObj[ key ] == undefined )
{
nodeObj[ key ] = new Object();
if( key != key.toLowerCase() )
{
nodeObj[ key.toLowerCase() ] = new Object();
}
}
appendAttribute( nodeObj[ key ], attributes );
if( key != key.toLowerCase() )
{
appendAttribute( nodeObj[ key.toLowerCase() ], attributes );
}
}
else
{
nodeObj["attrs"] = attributes;
}
}
}
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