Changeset 3341 for trunk/gsdl3/src/java/org/greenstone/gsdl3/util/GSXML.java

Timestamp:

2002-08-12T09:48:42+12:00 (22 years ago)

Author:

kjdon

Message:

some modifications

File:

• trunk/gsdl3/src/java/org/greenstone/gsdl3/util/GSXML.java (modified) (2 diffs)

trunk/gsdl3/src/java/org/greenstone/gsdl3/util/GSXML.java

@@ -107 +107 @@
     /** add text to a document/subsection  element */
     public static boolean addDocText(Document owner, Element doc, String text) {
+
     Element content = owner.createElement("content");
     Text t = owner.createTextNode(text);
@@ -133 +134 @@
 
     }
+
+    public static boolean mergeMetadataLists(Node to, Node from) {
+    Node to_meta = GSXML.getChildByTagName(to, "metadataList");
+    Node from_meta = getChildByTagName(from, "metadataList");
+    
+    if  (from_meta == null) { // nothing to copy
+        return true;
+    }
+    Document to_owner = to.getOwnerDocument();
+    Node new_from = to_owner.importNode(from_meta, true);
+
+    if (to_meta == null) { // just copy the whole list
+        to.appendChild(new_from);
+        return true;
+    }
+    
+    // copy individual elements
+    Node child = new_from.getFirstChild();
+    while ( child != null) {
+        to_meta.appendChild(child);
+        child = child.getNextSibling();
+    }
+    return true;
+    }
+    
+    /** takes two nodes - should have the same node type, tag name, etc
+     * copies the info from 'from' into 'to' 
+     -- not finished haven't thought through the algo yet.*/
+    /*
+    public static boolean mergeElements(Element to, Element from) {
+
+    if (to.getNodeName()!=from.getNodeName()) {
+        System.err.println("cant merge two nodes with different names");
+        return false;
+    }
+
+    // copy any atts over - ignore for now
+
+    // copy the children
+    if (!from.hasChildNodes()) {
+        return true;
+    }
+
+    // check if they belong to the same document
+    Document to_doc = to.getOwnerDocument();
+    Document from_doc = from.getOwnerDocument();
+    Element newfrom;
+    if (to_doc != from_doc) {
+        nfrom = to_doc.importNode(from, true);
+    } else {
+        newfrom = from;
+    }
+    
+    if (!to.hasChildNodes()) {
+        // just copy all the children over
+        Node child = newfrom.getFirstChild();
+        while (child !=null) {
+        to.appendChild(child);
+        child = child.getNextSibling();
+        }
+        return true;
+    }
+    
+    // have to check each one to see if already present or not
+    HashMap children = getChildrenMap(to);
+    
+    Node child = newfrom.getFirstChild();
+    while (child !=null) {
+        String name = child.getNodeName();
+        Node n = map.get(name);
+        if (n==null) { // there is no elem by that name in to
+        to.appendChild(child);
+        }
+        else {
+    }
+    return true;
+    }
+    */
+    /** returns the (first) child element with the given name */
+    public static Node getChildByTagName(Node n, String name) {
+
+    Node child = n.getFirstChild();
+    while (child!=null) {
+        if (child.getNodeName().equals(name)) {
+        return child;
+        }
+        child = child.getNextSibling();
+    }
+    return null; //not found
+    }
+    public static HashMap getChildrenMap(Node n) {
+    
+    HashMap map= new HashMap();
+    Node child = n.getFirstChild();
+    while (child!=null) {
+        String name = child.getNodeName();
+        map.put(name, child);
+        child = child.getNextSibling();
+    }
+    return map;
+    }
+       
+    public static Element createTextElement(Document owner, String elem_name,
+                        String text) {
+    Element e = owner.createElement(elem_name);
+    Text t = owner.createTextNode(text);
+    e.appendChild(t);
+    return e;
+
+    }
+
 }