/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.
*/
package org.apache.cocoon.forms.binding;
import org.apache.cocoon.forms.Constants;
import org.apache.cocoon.forms.datatype.convertor.Convertor;
import org.apache.cocoon.forms.util.DomHelper;
import org.apache.cocoon.i18n.I18nUtils;
import org.w3c.dom.Element;
import java.util.Locale;
/**
* ValueJXPathBindingBuilder provides a helper class for the Factory
* implemented in {@link JXPathBindingManager} that helps construct the
* actual {@link ValueJXPathBinding} out of the configuration in the
* provided configElement which looks like:
* <pre><code>
* <fb:value id="<i>widget-id</i>" path="<i>xpath-expression</i>">
* <!-- optional child binding to be executed upon 'save' of changed value -->
* <fb:on-update>
* <!-- any childbinding -->
* </fb:on-update>
* </fb:value>
* </code></pre>
*
* @version CVS $Id: ValueJXPathBindingBuilder.java,v 1.3 2004/04/01 12:59:57 mpo Exp $
*/
public class ValueJXPathBindingBuilder extends JXPathBindingBuilderBase {
/**
* Creates an instance of {@link ValueJXPathBinding} based on the attributes
* and nested configuration of the provided bindingElm.
*/
public JXPathBindingBase buildBinding(Element bindingElm, JXPathBindingManager.Assistant assistant) throws BindingException {
try {
CommonAttributes commonAtts = JXPathBindingBuilderBase.getCommonAttributes(bindingElm);
String xpath = DomHelper.getAttribute(bindingElm, "path");
String widgetId = DomHelper.getAttribute(bindingElm, "id");
Element updateWrapElement =
DomHelper.getChildElement(bindingElm, BindingManager.NAMESPACE, "on-update");
JXPathBindingBase[] updateBindings = assistant.makeChildBindings(updateWrapElement);
Convertor convertor = null;
Locale convertorLocale = Locale.US;
Element convertorEl = DomHelper.getChildElement(bindingElm, Constants.DEFINITION_NS, "convertor");
if (convertorEl != null) {
String datatype = DomHelper.getAttribute(convertorEl, "datatype");
String localeStr = convertorEl.getAttribute("datatype");
if (!localeStr.equals("")) {
convertorLocale = I18nUtils.parseLocale(localeStr);
}
convertor = assistant.getDatatypeManager().createConvertor(datatype, convertorEl);
}
ValueJXPathBinding fieldBinding =
new ValueJXPathBinding(commonAtts,
widgetId, xpath, updateBindings, convertor, convertorLocale);
return fieldBinding;
} catch (BindingException e) {
throw e;
} catch (Exception e) {
throw new BindingException("Error building binding defined at " + DomHelper.getLocation(bindingElm), e);
}
}
}