/*
* Copyright 1999-2005 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.formmodel.tree.builder;
import java.util.Iterator;
import org.apache.avalon.framework.service.ServiceSelector;
import org.apache.cocoon.forms.FormsConstants;
import org.apache.cocoon.forms.event.ValueChangedListener;
import org.apache.cocoon.forms.formmodel.AbstractWidgetDefinitionBuilder;
import org.apache.cocoon.forms.formmodel.WidgetDefinition;
import org.apache.cocoon.forms.formmodel.tree.Tree;
import org.apache.cocoon.forms.formmodel.tree.TreeDefinition;
import org.apache.cocoon.forms.formmodel.tree.TreeSelectionListener;
import org.apache.cocoon.forms.util.DomHelper;
import org.w3c.dom.Element;
/**
* Builds a {@link org.apache.cocoon.forms.formmodel.tree.Tree}.
*
* @version $Id: TreeDefinitionBuilder.java 326838 2005-10-20 06:26:53Z sylvain $
*/
public class TreeDefinitionBuilder extends AbstractWidgetDefinitionBuilder {
public WidgetDefinition buildWidgetDefinition(Element widgetElement) throws Exception {
TreeDefinition definition = new TreeDefinition();
setupDefinition(widgetElement, definition);
definition.makeImmutable();
return definition;
}
protected void setupDefinition(Element widgetElement, TreeDefinition definition) throws Exception {
super.setupDefinition(widgetElement, definition);
// Get the optional "root-visible" attribute
definition.setRootVisible(DomHelper.getAttributeAsBoolean(widgetElement, "root-visible", true));
// Get the optional "selection" attribute
String selection = DomHelper.getAttribute(widgetElement, "selection", null);
if (selection == null) {
// Nothing
} else if ("multiple".equals(selection)) {
definition.setSelectionModel(Tree.MULTIPLE_SELECTION);
} else if ("single".equals(selection)) {
definition.setSelectionModel(Tree.SINGLE_SELECTION);
} else {
throw new Exception("Invalid value selection value '" + selection + "' at " +
DomHelper.getLocation(widgetElement));
}
// Get the model optional element
Element modelElt = DomHelper.getChildElement(widgetElement, FormsConstants.DEFINITION_NS, "tree-model", false);
if (modelElt != null) {
String type = DomHelper.getAttribute(modelElt, "type");
ServiceSelector selector =
(ServiceSelector)this.serviceManager.lookup(TreeModelDefinitionBuilder.ROLE + "Selector");
TreeModelDefinitionBuilder builder = (TreeModelDefinitionBuilder)selector.select(type);
try {
definition.setModelDefinition(builder.build(modelElt));
} finally {
selector.release(builder);
serviceManager.release(selector);
}
}
// parse "on-selection-changed"
Iterator iter = buildEventListeners(widgetElement, "on-selection-changed", TreeSelectionListener.class).iterator();
while (iter.hasNext()) {
definition.addSelectionListener((TreeSelectionListener)iter.next());
}
//TODO: allow child widgets, that will be attached to each node of the tree
//It may be useful to add TreeModel.getNodeType(Object) so that the container holding child
//widgets can have a value used by a union widget.
}
}