RELEASE_2_1_13/src/blocks/forms/java/org/apache/cocoon/forms/formmodel/ExpandDefinitionBuilder.java

/*
 * 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.formmodel;

import org.apache.cocoon.forms.FormsException;
import org.apache.cocoon.forms.util.DomHelper;

import org.w3c.dom.Element;

/**
 * Builds definitions by using library definitions.
 *
 * @version $Id$
 */
public class ExpandDefinitionBuilder extends AbstractWidgetDefinitionBuilder {

    public WidgetDefinition buildWidgetDefinition(Element element, WidgetDefinitionBuilderContext context)
    throws Exception {
        String id = DomHelper.getAttribute(element, "id");

        WidgetDefinition definition = context.getLocalLibrary().getDefinition(id);
        if (definition == null) {
            throw new FormsException("Widget '" + id + "' not found.",
                                     DomHelper.getLocationObject(element));
        }

        return definition;
    }
}