package org.lsst.ccs.localdb.statusdb.server;
   
   import java.io.Serializable;
   import java.util.HashMap;
   import java.util.List;
   import java.util.Map;
   
   import javax.xml.bind.annotation.XmlElement;
   import javax.xml.bind.annotation.XmlElementWrapper;
  import javax.xml.bind.annotation.XmlRootElement;
  
  import org.lsst.ccs.localdb.statusdb.model.DataDesc;
  
  /**
   * Defines a data channel for trending analysis.
   * 
   */
  
  @XmlRootElement(name = "datachannel")
  public class DataChannel implements Serializable {
  
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = -9154127909107314678L;
  
  	public DataChannel(DataDesc desc) {
  		this.desc = desc;
  		path = desc.getPath();
                  setId(desc.getId());
  	}
  
  	public DataChannel() {
  	}
  
  	protected DataDesc desc;
  	
  	protected long id;
  	
  	@XmlElement
  	public long getId() {
              return id;
  	}
  	
  	public void setId(long id) {
  		this.id = id;
  	}
  
  	
  	/**
  	 * Channel's path For example : subsystem/variable (FCS/carouselPosition)
  	 * 
  	 */
  	@XmlElement(name = "pathelement")
  	@XmlElementWrapper
  	protected String[] path; // TODO decide how to construct that path, could be
  	// :
  	// DataDesc.scrSubsystem, DataDesc.srcName
  
  	Map<String, String> metadata = new HashMap<String, String>();
  
  	// getter
  
  	public String[] getPath() {
  		return path;
  	}
  
  	public String getPathAsString() {
  		return DataDesc.encodePath(path);
  	}
  
  	public Map<String, String> getMetadata() {
  		return metadata;
  	}
  
          public DataDesc getDataDescription() {
              return desc;
          }
          
  	@XmlElement(name = "metadata")
  	List<HashMapEntry4XML> getMetadataList() {
  		return HashMapEntry4XML.marshal(metadata);
  	}
  
  	// wrapper class to get the correct collection name
  	
  	@XmlRootElement(name="datachannels")
  	public static class DataChannelList {
  		@XmlElement(name="datachannel")
  		public List<DataChannel> list;
  
  		public DataChannelList(List<DataChannel> list) {
  			this.list = list;
  		}
  		
  		public DataChannelList() {}
  	}
  
  }