1 files changed, 68 insertions, 0 deletions
diff --git a/utils/src/main/java/at/gv/egiz/slbinding/RedirectUnmarshallerListener.java b/utils/src/main/java/at/gv/egiz/slbinding/RedirectUnmarshallerListener.java
new file mode 100644
index 00000000..08c12146
--- /dev/null
+++ b/utils/src/main/java/at/gv/egiz/slbinding/RedirectUnmarshallerListener.java
@@ -0,0 +1,68 @@
+/*
+* Copyright 2008 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package at.gv.egiz.slbinding;
+
+import javax.xml.bind.Unmarshaller;
+import javax.xml.stream.XMLStreamException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * Enables event redirection before marshalling a target of type RedirectCallback.
+ * It is up to the target class to implement the redirection (default implementation in RedirectCallback).
+ * Disables event redirection after marshalling (when the closing tag occurs).
+ * @author clemens
+ */
+public class RedirectUnmarshallerListener extends Unmarshaller.Listener {
+
+    private static Log log = LogFactory.getLog(RedirectUnmarshallerListener.class);
+    protected RedirectEventFilter eventFilter;
+
+    public RedirectUnmarshallerListener(RedirectEventFilter eventFilter) {
+        this.eventFilter = eventFilter;
+    }
+
+    @Override
+    public void beforeUnmarshal(Object target, Object parent) {
+        if (target instanceof RedirectCallback) {
+            try {
+                ((RedirectCallback) target).enableRedirect(eventFilter);
+            } catch (XMLStreamException ex) {
+                log.error("failed to enable event redirection for " + target.getClass().getName() + ": " + ex.getMessage(), ex);
+            }
+        }
+        if (target instanceof NamespaceContextCallback) {
+            ((NamespaceContextCallback) target).preserveNamespaceContext(eventFilter);
+        }
+    }
+
+    @Override
+    public void afterUnmarshal(Object target, Object parent) {
+        if (target instanceof RedirectCallback) {
+            try {
+                ((RedirectCallback) target).disableRedirect(eventFilter);
+            } catch (XMLStreamException ex) {
+                log.error("failed to disable event redirection for " + target.getClass().getName() + ": " + ex.getMessage(), ex);
+            }
+        }
+    }
+}