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Cayenne Object Persistence Framework

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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
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package org.apache.cayenne.property;

import java.util.List;

import org.apache.cayenne.ValueHolder;
import org.apache.cayenne.util.IndexPropertyList;

/**
 * A CollectionProperty that uses IndexPropertyList.
 * 
 * @since 1.2
 * @author Andrus Adamchik
 */
public class IndexedListProperty extends ListProperty {

    protected String indexPropertyName;

    public IndexedListProperty(ClassDescriptor owner, ClassDescriptor targetDescriptor,
            PropertyAccessor accessor, String reverseName, String indexPropertyName) {

        super(owner, targetDescriptor, accessor, reverseName);
        this.indexPropertyName = indexPropertyName;
    }

    /**
     * Creates a List indexed on a specified property.
     */
    protected ValueHolder createCollectionValueHolder(Object object)
            throws PropertyAccessException {
        List unordered = (List) super.createCollectionValueHolder(object);
        return new IndexPropertyList(indexPropertyName, unordered, true);
    }
}