Find the first direct child with a given attribute. : DOM Attribute « XML « Java

1. Java
2. XML
3. DOM Attribute

Find the first direct child with a given attribute.

  
import org.w3c.dom.Node;
/**
 *  
 *
 * @author Costin Manolache
 */
public class Main {
  /** Find the first direct child with a given attribute.
   * @param parent
   * @param elemName name of the element, or null for any 
   * @param attName attribute we're looking for
   * @param attVal attribute value or null if we just want any
   */ 
  public static Node findChildWithAtt(Node parent, String elemName,
                                      String attName, String attVal) {
      
      Node child=DomUtil.getChild(parent, Node.ELEMENT_NODE);
      if( attVal== null ) {
          while( child!= null &&
                  ( elemName==null || elemName.equals( child.getNodeName())) && 
                  DomUtil.getAttribute(child, attName) != null ) {
              child=getNext(child, elemName, Node.ELEMENT_NODE );
          }
      } else {
          while( child!= null && 
                  ( elemName==null || elemName.equals( child.getNodeName())) && 
                  ! attVal.equals( DomUtil.getAttribute(child, attName)) ) {
              child=getNext(child, elemName, Node.ELEMENT_NODE );
          }
      }
      return child;        
  }  
  /** 
   */ 
  public static Node getNext( Node current, String name, int type) {
      Node first=current.getNextSibling();
      if( first==null ) return null;

      for (Node node = first; node != null;
           node = node.getNextSibling()) {
          
          if( type >= 0 && node.getNodeType() != type ) continue;
          //System.out.println("getNode: " + name + " " + node.getNodeName());
          if( name==null )
              return node;
          if( name.equals( node.getNodeName() ) ) {
              return node;
          }
      }
      return null;
  }

}

   
    
  

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