OKW_XmlReader.java

package okw;
 
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
 
import javax.xml.bind.JAXBException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
 
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
import okw.exceptions.OKWMessageNotFoundException;
 
public class OKW_XmlReader // extends ClassLoader 
{
 
    private Document                myXMLDocument;
    private DocumentBuilderFactory  mydbFactory;
    private DocumentBuilder         mydBuilder;
    private XPath                   myXPath;
 
    private String                  myXMLFile;
 
    public String getXMLFile()
    {
        return myXMLFile.toString();
    }
 
    
    public OKW_XmlReader(String fpsXMLFile) throws JAXBException, ParserConfigurationException, SAXException, IOException
    {
        //myXMLFile = Paths.get( fpsXMLFile );
        myXMLFile = fpsXMLFile;
        Init();
    }
    
    private void Init() throws JAXBException, ParserConfigurationException, SAXException, IOException
    {
            InputStream is = OKW_XmlReader.class.getResourceAsStream( myXMLFile.toString() );
          
            if ( is == null )
            {
                System.out.println(
                        "============================================================================================================");
                System.out.println("OKW Exception: File not found! -> '" + myXMLFile.toString() + "'");
                System.out.println(
                        "============================================================================================================");
 
                throw new FileNotFoundException("File not found! The File was: '" + this.myXMLFile.toString() + "'");
            }
            else
            {
                this.mydbFactory = DocumentBuilderFactory.newInstance();
                this.mydBuilder = mydbFactory.newDocumentBuilder();
                this.myXMLDocument = mydBuilder.parse(is);
                this.myXPath = XPathFactory.newInstance().newXPath();
            }
    }
 
    public String getTextContentSingleValue( String fpsXPathExpression )
    {
        String lvsReturn = "Message Not Found!";
 
        try
        {
 
            NodeList myNodeList = (NodeList) myXPath.compile(fpsXPathExpression).evaluate(this.myXMLDocument,
                    XPathConstants.NODESET);
 
            
            if (myNodeList.getLength() == 1)
            {
                Node myNode = myNodeList.item(0);
                lvsReturn = myNode.getTextContent();
            }
            else if (myNodeList.getLength() < 1)
            {
                throw new OKWMessageNotFoundException("TextContent not Found!: " + fpsXPathExpression );
            }
            else
            {
                throw new OKWMessageNotFoundException("TextContent not Unique!: " + fpsXPathExpression );
            }
        }
         // OKWMessageNotFoundException
        catch (XPathExpressionException e)
        {
            OKW_HandleException.StopRunning(e, this.getClass());
        }
 
        return lvsReturn;
    }
 
    public ArrayList<String> getTextContentAsList( String fpsXPathExpression )
    {
 
        ArrayList<String> lvALReturn = new ArrayList<String>();
    
        try
        {
 
            NodeList myNodeList = (NodeList) myXPath.compile(fpsXPathExpression).evaluate(this.myXMLDocument,
                    XPathConstants.NODESET);
 
            int lviCount = myNodeList.getLength();
                    
            if (lviCount >= 1)
            {
                for( int i = 0; i < lviCount; i++ )
                {
                    Node myNode = myNodeList.item(i);
                    lvALReturn.add( myNode.getTextContent() );
                }
            }
            else
            {
                throw new OKWMessageNotFoundException("TextContent not Found!");
            }
        }
        
        catch (OKWMessageNotFoundException | XPathExpressionException e)
        {
            OKW_HandleException.StopRunning(e, this.getClass());
        }
 
        return lvALReturn;
    }
 
}