Changeset 9912

Timestamp:

2005-05-19T12:24:02+12:00 (19 years ago)

Author:

kjdon

Message:

added in index handling for paths eg response[1]/docNodeList - so far used for a new request type - messaging, which modifies requests/responses

Location:

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

Files:

• GSPath.java (modified) (1 diff)
• GSXML.java (modified) (3 diffs)

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

@@ -122 +122 @@
     return path;
     }
+
+    static public int getIndex(String link) {
+    int i = link.indexOf("[");
+    if (i==-1) {
+        return -1;
+    }
+    int j = link.indexOf("]");
+    String num = link.substring(i+1,j);
+    try {
+        int index = Integer.parseInt(num);
+        return index;
+    } catch (Exception e) {
+        return -1;
+    }
+    }
+
+    static public String removeIndex(String link) {
+    int i = link.indexOf("[");
+    if (i==-1) {
+        return link;
+    }
+    return link.substring(0, i);
+    }
+
 }
 

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

@@ -153 +153 @@
     // get any format info for a service
     public static final String REQUEST_TYPE_FORMAT = "format"; 
-   
+    // modify the requests
+    public static final String REQUEST_TYPE_MESSAGING = "messaging";
+
     // service types
     public static final String SERVICE_TYPE_QUERY = "query";
@@ -392 +394 @@
     return null; //not found
     }
+    
+    /** returns the (nth) child element with the given name 
+     * index numbers start at 0 */
+    public static Node getChildByTagNameIndexed(Node n, String name, int index) {
+    if (index == -1) {
+        return getChildByTagName(n, name);
+    }
+    int count = 0;
+    Node child = n.getFirstChild();
+    while (child!=null) {
+        if (child.getNodeName().equals(name)) {
+        if (count == index) {
+            return child;
+        } else {
+            count++;
+        }
+        }
+        child = child.getNextSibling();
+    }
+    return null; //not found
+    }
 
     /** takes an xpath type expression of the form name/name/... 
@@ -409 +432 @@
     return n;
     }
+
+    /** takes an xpath type expression of the form name/name/... 
+     * and returns the first node that matches, or null if not found 
+     * can include [i] indices. index numbers start at 0 */
+    public static Node getNodeByPathIndexed(Node n, String path) {
+    
+    String link = GSPath.getFirstLink(path);
+    int index = GSPath.getIndex(link);
+    if (index != -1) {
+        link = GSPath.removeIndex(link);
+    }
+    path = GSPath.removeFirstLink(path);
+    while (!link.equals("")) {
+        n = getChildByTagNameIndexed(n, link, index);
+        if (n==null) {
+        return null;
+        }
+        link = GSPath.getFirstLink(path);
+        index = GSPath.getIndex(link);
+        if (index != -1) {
+        link = GSPath.removeIndex(link);
+        }
+        path = GSPath.removeFirstLink(path);
+    }
+    return n;
+    }
+
     public static HashMap getChildrenMap(Node n) {