XmlGroupReferenceProperty.java

/*
 * Copyright (c) 2012 Data Harmonisation Panel
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     HUMBOLDT EU Integrated Project #030962
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.io.xsd.reader.internal;

import javax.xml.namespace.QName;

import eu.esdihumboldt.hale.common.schema.model.ChildDefinition;
import eu.esdihumboldt.hale.common.schema.model.DefinitionGroup;
import eu.esdihumboldt.hale.common.schema.model.DefinitionUtil;
import eu.esdihumboldt.hale.io.xsd.model.XmlGroup;
import eu.esdihumboldt.hale.io.xsd.model.XmlIndex;

/**
 * Group property referencing a XML group
 * 
 * @author Simon Templer
 */
public class XmlGroupReferenceProperty extends LazyGroupPropertyDefinition {

	private final QName groupName;

	private XmlGroup referencedGroup;

	/**
	 * Create a property that references a XML group
	 * 
	 * @param name the property name
	 * @param declaringType the declaring type
	 * @param index the XML index
	 * @param groupName the group name
	 * @param allowFlatten if the group may be replaced by its children
	 */
	public XmlGroupReferenceProperty(QName name, DefinitionGroup declaringType, XmlIndex index,
			QName groupName, boolean allowFlatten) {
		super(name, declaringType, index, allowFlatten);

		this.groupName = groupName;
	}

	/**
	 * @see LazyGroupPropertyDefinition#initChildren()
	 */
	@Override
	protected void initChildren() {
		XmlGroup group = resolveGroup();

		if (group == null) {
			throw new IllegalStateException("Referenced group could not be found: "
					+ groupName.toString());
		}

		// redeclare children
		for (ChildDefinition<?> child : group.getDeclaredChildren()) {
			ChildDefinition<?> redeclaredChild = DefinitionUtil.redeclareChild(child, this);
			addChild(redeclaredChild);
		}
	}

	private XmlGroup resolveGroup() {
		if (referencedGroup == null) {
			referencedGroup = index.getGroups().get(groupName);
		}

		return referencedGroup;
	}

}