diff options
Diffstat (limited to 'utils/src/main/java/at/gv/egiz/slbinding/RedirectUnmarshallerListener.java')
-rw-r--r-- | utils/src/main/java/at/gv/egiz/slbinding/RedirectUnmarshallerListener.java | 68 |
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); + } + } + } +} |