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-rw-r--r--common/src/at/gv/egovernment/moa/util/XPathUtils.java105
1 files changed, 105 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/XPathUtils.java b/common/src/at/gv/egovernment/moa/util/XPathUtils.java
index 4ee160476..aa5a4fec5 100644
--- a/common/src/at/gv/egovernment/moa/util/XPathUtils.java
+++ b/common/src/at/gv/egovernment/moa/util/XPathUtils.java
@@ -412,5 +412,110 @@ public class XPathUtils {
Attr attr = (Attr) XPathUtils.selectSingleNode(root, xpath);
return attr != null ? attr.getValue() : def;
}
+
+ /**
+ * Return the SecurityLayer namespace prefix of the context element.
+ * If the context element has no prefix explicitely set (i.e. is specified
+ * within the <code>default</code> namespace), the method sets the prefix
+ * according to the value of the <code>xmlns</code> attribute of the context
+ * element.
+ * The returned prefix is needed for evaluating XPATH expressions.
+ *
+ * @param contextElement The element to get a prefix from.
+ *
+ * @return The string <code>sl10</code>, <code>sl11</code> or <code>sl</code>,
+ * depending on the SecurityLayer namespace of the contextElement.
+ *
+ * throws XpathException If the element has no prefix or no valid SecurityLayer
+ * namespace is used as default namespace.
+ */
+ public static String getSlPrefix (Element contextElement) throws XPathException {
+ String slPrefix = contextElement.getPrefix();
+ if (slPrefix != null) {
+ return slPrefix;
+ } else {
+ String nameSpace = contextElement.getAttribute("xmlns");
+
+ if (nameSpace.equals(Constants.SL10_NS_URI)) {
+ slPrefix = Constants.SL10_PREFIX;
+ } else if (nameSpace.equals(Constants.SL12_NS_URI)) {
+ slPrefix = Constants.SL12_PREFIX;
+ } else if (nameSpace.equals(Constants.SL11_NS_URI)) {
+ slPrefix = Constants.SL11_PREFIX;
+ } else {
+ MessageProvider msg = MessageProvider.getInstance();
+ String message = msg.getMessage("xpath.00", new Object[] { "Ungültiger SecurityLayer Namespace: \"" + nameSpace + "\"."});
+ throw new XPathException(message, null);
+
+ }
+
+ return slPrefix;
+ }
+ }
+
+
+ /**
+ * Return the SecurityLayer namespace prefix of the context element.
+ * If the context element is not the element that lies within the
+ * SecurityLayer namespace. The Securitylayer namespace is derived from
+ * the <code>xmlns:sl10</code>, <code>sl11</code> or <code>sl</code>
+ * attribute of the context element.
+ *
+ * The returned prefix is needed for evaluating XPATH expressions.
+ *
+ * @param contextElement The element to get a prefix for the Securitylayer namespace,
+ * that is used within the corresponding document.
+ *
+ * @return The string <code>sl10</code>, <code>sl11</code> or <code>sl</code>,
+ * depending on the SecurityLayer namespace of the contextElement.
+ *
+ * throws XPathException If no (vlalid) SecurityLayer namespace prefix or namespace
+ * is defined.
+ */
+ public static String getSlPrefixFromNoRoot (Element contextElement) throws XPathException {
+
+ String slPrefix = checkSLnsDeclaration(contextElement, Constants.SL10_PREFIX, Constants.SL10_NS_URI);
+ if (slPrefix == null) {
+ slPrefix = checkSLnsDeclaration(contextElement, Constants.SL11_PREFIX, Constants.SL11_NS_URI);
+ }
+ if (slPrefix == null) {
+ slPrefix = checkSLnsDeclaration(contextElement, Constants.SL12_PREFIX, Constants.SL12_NS_URI);
+ }
+
+ return slPrefix;
+
+ }
+
+ /**
+ * Checks if the context element has an attribute <code>xmlns:slPrefix</code> and
+ * if the prefix of that attribute corresponds with a valid SecurityLayer namespace.
+ *
+ * @param contextElement The element to be checked.
+ * @param slPrefix The prefix which should be checked. Must be a valid SecurityLayer
+ * namespace prefix.
+ * @param slNameSpace The SecurityLayer namespace that corresponds to the specified prefix.
+ *
+ * @return The valid SecurityLayer prefix or <code>null</code> if this prefix is
+ * not used.
+ * @throws XPathException
+ */
+ private static String checkSLnsDeclaration(Element contextElement, String slPrefix, String slNameSpace)
+ throws XPathException
+ {
+ String nsAtt = "xmlns:" + slPrefix;
+ String nameSpace = contextElement.getAttribute(nsAtt);
+ if (nameSpace == "") {
+ return null;
+ } else {
+ // check if namespace is correct
+ if (nameSpace.equals(slNameSpace)) {
+ return slPrefix;
+ } else {
+ MessageProvider msg = MessageProvider.getInstance();
+ String message = msg.getMessage("xpath.00", new Object[] { "Ungültiger SecurityLayer Namespace: \"" + nameSpace + "\"."});
+ throw new XPathException(message, null);
+ }
+ }
+ }
}