/*
* 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.woody.formmodel;
import org.apache.avalon.framework.service.ServiceSelector;
import org.apache.cocoon.woody.Constants;
import org.apache.cocoon.woody.datatype.SelectionList;
import org.apache.cocoon.woody.datatype.SelectionListBuilder;
import org.apache.cocoon.woody.util.DomHelper;
import org.w3c.dom.Element;
/**
* Abstract base class for WidgetDefinitionBuilders that build widgets that have datatypes/selection lists.
*
* @version $Id: AbstractDatatypeWidgetDefinitionBuilder.java,v 1.9 2004/03/09 13:53:56 reinhard Exp $
*/
public abstract class AbstractDatatypeWidgetDefinitionBuilder extends AbstractWidgetDefinitionBuilder {
/**
* @return true if a selectionlist has actually been build.
*/
protected boolean buildSelectionList(Element widgetElement, AbstractDatatypeWidgetDefinition widget) throws Exception {
// FIXME: pass the manager to the definition as a side effect. Should be removed
// when definition are managed like components.
widget.service(this.serviceManager);
Element selectionListElement = DomHelper.getChildElement(widgetElement, Constants.WD_NS, "selection-list");
if (selectionListElement != null) {
// Get an appropriate list builder
ServiceSelector builderSelector = (ServiceSelector)this.serviceManager.lookup(SelectionListBuilder.ROLE + "Selector");
SelectionListBuilder builder = null;
try {
// listType can be null, meaning we will use the default selection list
String listType = selectionListElement.getAttribute("type");
if ("".equals(listType)) {
listType = null;
}
builder = (SelectionListBuilder)builderSelector.select(listType);
SelectionList list = builder.build(selectionListElement, widget.getDatatype());
widget.setSelectionList(list);
} finally {
if (builder != null) {
builderSelector.release(builder);
}
this.serviceManager.release(builderSelector);
}
return true;
} else {
return false;
}
}
}