/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.cocoon.forms.binding;
import org.apache.cocoon.forms.formmodel.Union;
import org.apache.cocoon.forms.formmodel.Widget;
import org.apache.commons.jxpath.JXPathContext;
/**
* UnionJXPathBinding provides an implementation of a {@link Binding}
* that narrows the context towards provided childbindings.
* <p>NOTES:
* <ol>
* <li>This Binding assumes that the provided widget-id points to a
* union widget.</li>
* </ol>
*
* @version $Id: UnionJXPathBinding.java 517733 2007-03-13 15:37:22Z vgritsenko $
*/
public class UnionJXPathBinding extends ComposedJXPathBindingBase {
private final String xpath;
private final String widgetId;
/**
* Constructs UnionJXPathBinding
* @param commonAtts
* @param widgetId
* @param xpath
* @param childBindings
*/
public UnionJXPathBinding(JXPathBindingBuilderBase.CommonAttributes commonAtts,
String widgetId,
String xpath,
JXPathBindingBase[] childBindings) {
super(commonAtts, childBindings);
this.widgetId = widgetId;
this.xpath = xpath;
}
public String getXPath() { return xpath; }
public String getId() { return widgetId; }
/**
* Narrows the scope on the form-model to the member widget-field, and
* narrows the scope on the object-model to the member xpath-context
* before continuing the binding over the child-bindings.
*/
public void doLoad(Widget frmModel, JXPathContext jxpc) throws BindingException {
Widget widget = selectWidget(frmModel, this.widgetId);
JXPathContext subContext = jxpc.getRelativeContext(jxpc.getPointer(this.xpath));
if (!(widget instanceof Union)) {
throw new RuntimeException("Binding: Expected Union widget, but received class: \"" +
widget.getClass().getName() + "\".");
}
Union unionWidget = (Union)widget;
Binding[] subBindings = getChildBindings();
if (subBindings != null) {
int size = subBindings.length;
for (int i = 0; i < size; i++) {
subBindings[i].loadFormFromModel(unionWidget, subContext);
}
}
if (getLogger().isDebugEnabled()) {
getLogger().debug("done loading " + this);
}
}
/**
* Narrows the scope on the form-model to the member widget-field, and
* narrows the scope on the object-model to the member xpath-context
* before continuing the binding over the child-bindings.
*/
public void doSave(Widget frmModel, JXPathContext jxpc) throws BindingException {
Union unionWidget = (Union)selectWidget(frmModel, this.widgetId);
JXPathContext subContext = jxpc.getRelativeContext(jxpc.getPointer(this.xpath));
Binding[] subBindings = getChildBindings();
if (subBindings != null) {
int size = subBindings.length;
for (int i = 0; i < size; i++) {
subBindings[i].saveFormToModel(unionWidget, subContext);
}
}
if (getLogger().isDebugEnabled()) {
getLogger().debug("done saving " + this);
}
}
public String toString() {
return "UnionJXPathBinding [widget=" + this.widgetId + ", xpath=" + this.xpath + "]";
}
}