/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.purl.sword.base;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Properties;
import org.apache.log4j.Logger;
/**
*
* @author Neil Taylor (nst@aber.ac.uk)
*/
public class SwordContentPackageTypes {
private static Logger log = Logger.getLogger(SwordContentPackageTypes.class);
private static Properties types;
static
{
// static constructor to attempt to load the properties file
try
{
types = new Properties();
InputStream stream = SwordContentPackageTypes.class.getClassLoader().getResourceAsStream("swordContentPackageTypes.properties");
if( stream != null )
{
types.loadFromXML(stream);
}
}
catch(Exception ex)
{
log.error("Unable to load sword types property file: " + ex.getMessage());
}
}
public SwordContentPackageTypes()
{
}
private static SwordContentPackageTypes instance;
public static SwordContentPackageTypes instance()
{
if( instance == null )
{
instance = new SwordContentPackageTypes();
}
return instance;
}
public boolean isValidType(String uri)
{
return types.containsKey(uri);
}
public boolean isEmpty()
{
return types.isEmpty();
}
/**
*
*/
public Enumeration elements()
{
return types.elements();
}
public Enumeration keys()
{
return types.keys();
}
}