1 files changed, 169 insertions, 0 deletions
diff --git a/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/DOMUtils.java b/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/DOMUtils.java
new file mode 100644
index 000000000..814d7832e
--- /dev/null
+++ b/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/DOMUtils.java
@@ -0,0 +1,169 @@
+/*
+ * Created on 28.11.2003
+ *
+ * (c) Stabsstelle IKT-Strategie des Bundes
+ */
+package at.gv.egovernment.moa.spss.slinterface;
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.xerces.parsers.DOMParser;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+import at.gv.egovernment.moa.spss.slinterface.listeners.XMLParserErrorHandler;
+
+/**
+ * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
+ */
+public class DOMUtils
+{
+  private static final String SAX_NAMESPACES_FEATURE = "http://xml.org/sax/features/namespaces";
+  private static final String XERCES_CREATE_ENTITY_REF_NODES_FEATURE =
+    "http://apache.org/xml/features/dom/create-entity-ref-nodes";
+  protected static final String XERCES_DEFER_NODE_EXPANSION_ =
+    "http://apache.org/xml/features/dom/defer-node-expansion";
+
+  /* ---------------------------------------------------------------------------------------------------- */
+  
+  /**
+   * Gets the first text node of the specified element.
+   * 
+   * @param elem The element.
+   *
+   * @return the first text node of the specified element, or <code>null</code> if <code>element</code>
+   *         equals <code>null</code>, or if the element has no text node.
+   */
+  public static String getText(Element elem)
+  {
+    if (elem == null) return null;
+    NodeList childNodes = elem.getChildNodes();
+    for (int i = 0; i < childNodes.getLength(); i++)
+    {
+      Node currNode = childNodes.item(i);
+      if (currNode.getNodeType() == Node.TEXT_NODE) return currNode.getNodeValue();
+    }
+    return null;
+  }
+
+  /* ---------------------------------------------------------------------------------------------------- */
+  
+  /**
+   * Gets the first text node of the specified child element from the specified parent element.
+   * 
+   * @param parent The parent.
+   * 
+   * @param childNS The namespace of the child element.
+   * 
+   * @param childLocName The local name of the child element.
+   * 
+   * @return the first text node of the specified child, or <code>null</code> if <code>parent</code> equals
+   *         <code>null</code> or has no child element with the specified namespace and local name, or if 
+   *         the child element has no text node.
+   */
+  public static String getChildText(Element parent, String childNS, String childLocName)
+  {
+    if (parent == null) return null;
+    Element child = getChildElem(parent, childNS, childLocName);
+    if (child == null) return null;
+    return getText(child);
+  }
+
+  /* ---------------------------------------------------------------------------------------------------- */
+
+  /**
+   * Gets the first child element of the specified parent with the specified namspace and local name.
+   * 
+   * @param parent The parent.
+   * 
+   * @param childNS The namespace of the child element to be searched for.
+   * 
+   * @param childLocName The local name of the child element to be searched for.
+   * 
+   * @return the first child element as described above, or <code>null</code> if <code>parent</code> is
+   *         null or has no child elements with for the specified namespace and local name.
+   */
+  public static Element getChildElem(Element parent, String childNS, String childLocName)
+  {
+    List childElems = getChildElems(parent, childNS, childLocName, true);
+    return (childElems == null) ? null : (Element) childElems.get(0);
+  }
+
+  /* ---------------------------------------------------------------------------------------------------- */
+
+  /**
+   * Gets all or the first child element(s) of the specified parent with the specified namspace and local 
+   * name.
+   * 
+   * @param parent The parent.
+   * 
+   * @param childNS The namespace of the child elements to be searched for.
+   * 
+   * @param childLocName The local name of the child elements to be searched for.
+   * 
+   * @param firstOnly Specifies wheter only the first or all child elements with the specified namespace and
+   *                  local name should be returned.
+   * 
+   * @return a <code>java.util.List</code> with objects of type <code>org.w3c.dom.Element</code>; each 
+   *         element in the list represents a child element as specified above. If <code>parent</code> 
+   *         equals <code>null</code>, or if there are no child elements as specified above, <code>null
+   *         </code> will be returned.
+   */
+  public static List getChildElems(Element parent, String childNS, String childLocName, boolean firstOnly)
+  {
+    if (parent == null) return null;
+
+    ArrayList childElems = new ArrayList();
+    NodeList childNodes = parent.getChildNodes();
+    for (int i = 0; i < childNodes.getLength(); i++)
+    {
+      Node currNode = childNodes.item(i);
+      if (currNode.getNodeType() == Node.ELEMENT_NODE)
+      {
+        Element currElem = (Element) currNode;
+        if (childNS.equals(currElem.getNamespaceURI()) && childLocName.equals(currElem.getLocalName()))
+        {
+          childElems.add(currElem);
+          if (firstOnly) break;
+        }
+      }
+    }
+    return (childElems.size() == 0) ? null : childElems;
+  }
+
+  /* ---------------------------------------------------------------------------------------------------- */
+
+  public static Document parseWellFormed(InputStream is) throws Exception
+  {
+    DOMParser xmlParser = new DOMParser();
+    try
+    {
+      xmlParser.setFeature(SAX_NAMESPACES_FEATURE, true);
+      xmlParser.setFeature(XERCES_CREATE_ENTITY_REF_NODES_FEATURE, false);
+      xmlParser.setFeature(XERCES_DEFER_NODE_EXPANSION_, false);
+      xmlParser.setErrorHandler(new XMLParserErrorHandler(false, true, true));
+  
+    }
+    catch (SAXException e)
+    {
+      String message = "Initialization of XML parser failed.";
+      throw new Exception(message, e);
+    }
+    try
+    {
+      xmlParser.parse(new InputSource(is));
+      return xmlParser.getDocument();
+    }
+    catch (Exception e)
+    {
+      String message = "Wellformed parsing failed.";
+      throw new Exception(message, e);
+    }
+  }
+}