package at.knowcenter.wag.egov.egiz.ldap.client;

import iaik.asn1.structures.Name;
import iaik.utils.RFC2253NameParser;
import iaik.utils.RFC2253NameParserException;

import java.util.Hashtable;
import java.util.Iterator;

import org.apache.log4j.Logger;

/**
 * @author <a href="mailto:thomas.knall@iaik.tugraz.at">Thomas Knall</a>
 */
public class LDAPMappingStore {
	
//	private Hashtable<Name, LDAPMapping> storedMappings;
	private Hashtable storedMappings;
	private LDAPIssuerNameFilter issuerNameFilter;
	private Logger log = Logger.getLogger(getClass());
	
	public LDAPMappingStore(LDAPIssuerNameFilter issuerNameFilter) {
		this.storedMappings = new Hashtable();
		this.issuerNameFilter = issuerNameFilter;
	}
	
	public LDAPMappingStore() {
		this(null);
	}
	
	public void clearStore() {
		this.storedMappings = new Hashtable();
	}
	
	public boolean isEmpty() {
		return this.storedMappings.isEmpty();
	}
	
	public boolean isLDAPIssuerNameFilter() {
		return this.issuerNameFilter != null;
	}
	
	public void storeMapping(LDAPMapping mapping) {
		Name name = mapping.getIssuerName();
		if (issuerNameFilter != null) {
			name = this.issuerNameFilter.applyFilter(name);
		}
		if (this.storedMappings.containsKey(name)) {
			log.warn("Skipping mapping \"" + mapping + "\" because is has already been stored under \"" + name.getName() + "\".");
		} else {
			log.debug("Storing mapping \"" + mapping + "\" under \"" + name.getName() + "\".");
			this.storedMappings.put(name, mapping);
		}
	}

//	public void storeMappings(Iterable iterable) {
//		Iterator it = iterable.iterator();
//		while (it.hasNext()) {
//			this.storeMapping((LDAPMapping) it.next());
//		}
//	}
	
	public LDAPMapping getMapping(Name name) {
		if (issuerNameFilter != null) {
			name = this.issuerNameFilter.applyFilter(name);
		}
		return (LDAPMapping) this.storedMappings.get(name);
	}
	
	public LDAPMapping getMapping(String nameString) throws LDAPException {
		RFC2253NameParser parser = new RFC2253NameParser(nameString);
		Name name;
		try {
			name = parser.parse();
		} catch (RFC2253NameParserException e) {
			throw new LDAPException(e);
		}
		if (issuerNameFilter != null) {
			name = this.issuerNameFilter.applyFilter(name);
		}
		return getMapping(name);
	}
	
}