/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
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*
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package org.apache.commons.discovery.resource.names;
import org.apache.commons.discovery.ResourceNameDiscover;
import org.apache.commons.discovery.ResourceNameIterator;
import org.apache.commons.discovery.log.DiscoveryLogFactory;
import org.apache.commons.logging.Log;
/**
* Recover resource name from System Properties.
*
* @author Richard A. Sitze
*/
public class DiscoverNamesInSystemProperties
extends ResourceNameDiscoverImpl
implements ResourceNameDiscover
{
private static Log log = DiscoveryLogFactory.newLog(DiscoverNamesInSystemProperties.class);
public static void setLog(Log _log) {
log = _log;
}
/** Construct a new resource discoverer
*/
public DiscoverNamesInSystemProperties() {
}
/**
* @return Enumeration of ResourceInfo
*/
public ResourceNameIterator findResourceNames(final String resourceName) {
if (log.isDebugEnabled())
log.debug("find: resourceName='" + resourceName + "'");
return new ResourceNameIterator() {
private String resource = System.getProperty(resourceName);
public boolean hasNext() {
return resource != null;
}
public String nextResourceName() {
String element = resource;
resource = null;
return element;
}
};
}
}