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/**
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*
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*/
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package edu.ucsb.nceas.metacat.dataone;
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import org.dataone.service.types.v1.SystemMetadata;
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import edu.ucsb.nceas.metacat.IdentifierManager;
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import edu.ucsb.nceas.metacat.McdbDocNotFoundException;
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/**
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* @author berkley
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*
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* Class to handle SystemMetadata object in the metacat system
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*/
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public class SystemMetadataManager
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{
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//singleton instance
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private static SystemMetadataManager manager = null;
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private IdentifierManager idManager = null;
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/**
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* private constructor. Use the singleton getInstance() method to use
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* this class
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*/
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private SystemMetadataManager()
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{
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idManager = IdentifierManager.getInstance();
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}
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/**
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* get a singleton instance of this class
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*/
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public static SystemMetadataManager getInstance()
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{
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if(manager == null)
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{
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manager = new SystemMetadataManager();
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}
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return manager;
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}
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/**
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* return true if the document represented by guid has a system metadata
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* document registered in the systemmetadata table
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* @param guid
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* @return
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*/
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public boolean documentHasSystemMetadata(String guid)
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{
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boolean hassm = false;
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try
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{
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SystemMetadata sm = idManager.getSystemMetadata(guid);
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if(sm != null && !sm.getIdentifier().getValue().equals(""))
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{
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hassm = true;
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}
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}
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catch(McdbDocNotFoundException me)
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{
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//if this exception is thrown, the doc with guid does not have
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//sys metadata
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}
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return hassm;
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}
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}
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