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/* Copyright (c) 2001 - 2008 TOPP - www.openplans.org. All rights reserved.
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.catalog;

import java.io.Serializable;
import java.util.List;
import java.util.Map;

import org.geotools.geometry.jts.ReferencedEnvelope;

/**
 * A map in which the layers grouped together can be referenced as 
 * a regular layer.
 * 
 * @author Justin Deoliveira, The Open Planning Project
 *
 */
public interface LayerGroupInfo {

    String getId();
    
    /**
     * The name of the layer group.
     */
    String getName();

    /**
     * Sets the name of the layer group.
     */
    void setName( String name );
    
    /**
     * The layers in the group.
     */
    List getLayers();
    
    /**
     * The styles for the layers in the group.
     * 
     * This list is a 1-1 correspondence to {@link #getLayers()}.
     * 
     */
    List getStyles();
    
    /**
     * The bounds for the base map.
     */
    ReferencedEnvelope getBounds();

    /**
     * Sets the bounds for the base map.
     */
    void setBounds( ReferencedEnvelope bounds );
    
    /**
     * A persistent map of metadata.
     * 
     * Data in this map is intended to be persisted. Common case of use is to
     * have services associate various bits of data with a particular layer group. 
     * An example might include caching information.
     * 
     * 
     * The key values of this map are of type {@link String} and values are of
     * type {@link Serializable}.
     * 
     * 
     */
    Map getMetadata();
}