/*
 * Directory Lookup Service *
 * author: Florida Estrella
*/

package org.cristalise.lookup.ldap;

import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.StringTokenizer;

import org.cristalise.kernel.common.ObjectAlreadyExistsException;
import org.cristalise.kernel.common.ObjectCannotBeUpdated;
import org.cristalise.kernel.common.ObjectNotFoundException;
import org.cristalise.kernel.entity.proxy.ProxyMessage;
import org.cristalise.kernel.lookup.AgentPath;
import org.cristalise.kernel.lookup.DomainPath;
import org.cristalise.kernel.lookup.InvalidItemPathException;
import org.cristalise.kernel.lookup.ItemPath;
import org.cristalise.kernel.lookup.LookupManager;
import org.cristalise.kernel.lookup.Path;
import org.cristalise.kernel.lookup.RolePath;
import org.cristalise.kernel.process.Gateway;
import org.cristalise.kernel.process.auth.Authenticator;
import org.cristalise.kernel.property.Property;
import org.cristalise.kernel.property.PropertyDescription;
import org.cristalise.kernel.property.PropertyDescriptionList;
import org.cristalise.kernel.utils.Logger;
import org.omg.CORBA.Object;

import com.novell.ldap.LDAPAttribute;
import com.novell.ldap.LDAPAttributeSet;
import com.novell.ldap.LDAPConnection;
import com.novell.ldap.LDAPEntry;
import com.novell.ldap.LDAPException;
import com.novell.ldap.LDAPSearchConstraints;
import com.novell.ldap.LDAPSearchResults;

/**
 * The LDAPLookup object, statically accessible through the Gateway, manages
 * the LDAP connection for the cristal process. It provides:
 * <ul>
 * <li>Authentication - returning an AgentProxy object if a user has logged in
 * <li>System key generation - through the NextKeyManager
 * <li>Agent and Role lookup/modification - through the RoleManager
 * <li>
 * @version $Revision: 1.113 $ $Date: 2006/03/03 13:52:21 $
 * @author  $Author: abranson $
 */

public class LDAPLookup implements LookupManager{
	
	protected LDAPAuthManager mLDAPAuth;
	protected LDAPPropertyManager mPropManager;
	protected LDAPProperties ldapProps;

    private String mGlobalPath, mRootPath, mLocalPath, mRolePath, mItemTypeRoot, mDomainTypeRoot;

    /**
     * 
     */
    public LDAPLookup() {
    	super();
    }
    
    /**
     * Initializes the DN paths from the Root, global and local paths supplied by the LDAP properties.
     * @param props
     */
    protected void initPaths(LDAPProperties props){
    	
        Logger.msg(8,"LDAPLookup.initPaths(): - initialising with LDAPProperties");
        ldapProps = props;

        mGlobalPath=props.mGlobalPath;
        mRootPath=props.mRootPath;
        mLocalPath=props.mLocalPath;

        mItemTypeRoot = "cn=entity,"+props.mLocalPath;
        mDomainTypeRoot = "cn=domain,"+props.mLocalPath;
        mRolePath = "cn=agent,"+mDomainTypeRoot; 
    }
    
    /**
     * Initializes the LDAPLookup manager with the Gateway properties.
     * This should be only done by the Gateway during initialisation.
     *
     * @param auth A LDAPAuthManager authenticator
     */
    @Override
	public void open(Authenticator auth) {
    	if (ldapProps == null)
    		initPaths(new LDAPProperties(Gateway.getProperties()));
        
    	mLDAPAuth = (LDAPAuthManager)auth;
      	mPropManager = new LDAPPropertyManager(this, mLDAPAuth);
    }

    /**
     * Gets the property manager, that is used to read and write cristal properties to the LDAP store.
     * @return Returns the global LDAPPropertyManager.
     */
    public LDAPPropertyManager getPropManager() {
        return mPropManager;
    }

    /**
     * Disconnects the connection with the LDAP server during shutdown
     */
	@Override
	public void close() {
        Logger.msg(1, "LDAP Lookup: Shutting down LDAP connection.");
        if (mLDAPAuth != null) {
           	mLDAPAuth.disconnect();
            mLDAPAuth = null;
        }
    }

   /**
    * Attempts to resolve the CORBA object for a Path, either directly or through an alias.
    * @param path the path to resolve
    * @return the CORBA object
    * @throws ObjectNotFoundException When the path does not exist
    */
    public org.omg.CORBA.Object getIOR(Path path)
    throws ObjectNotFoundException
    {
        return resolveObject(getFullDN(path));
    }

    /**
     * Attempts to resolve the CORBA object from the IOR attribute of a DN, either directly or through an alias
     * @param dn The String dn
     * @throws ObjectNotFoundException when the dn or aliased dn does not exist
     */
    private org.omg.CORBA.Object resolveObject(String dn)
        throws ObjectNotFoundException
    {
        Logger.msg(8,"LDAPLookup.resolveObject("+dn+")");
        LDAPEntry anEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(),dn,LDAPSearchConstraints.DEREF_NEVER);
        if (anEntry != null)
        {
            String iorString;
            try {
                iorString = LDAPLookupUtils.getFirstAttributeValue(anEntry, "ior");
                org.omg.CORBA.Object ior=Gateway.getORB().string_to_object(iorString);
                if (ior!=null)
                    return ior;
                else
                    throw new ObjectNotFoundException("LDAPLookup.resolveObject() - " + dn + " has no IOR");
            } catch (ObjectNotFoundException ex) {
                return resolveObject(LDAPLookupUtils.getFirstAttributeValue(anEntry,"aliasedObjectName"));
            }
        }
        else
            throw new ObjectNotFoundException("LDAPLookup.resolveObject() LDAP node " + dn + " is not in LDAP or has no IOR.");
    }

    /**
     *
     * @param domPath
     * @return
     * @throws InvalidItemPathException
     * @throws ObjectNotFoundException
     */
    @Override
	public ItemPath resolvePath(DomainPath domPath)
        throws InvalidItemPathException, ObjectNotFoundException {

        LDAPEntry domEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), 
                getFullDN(domPath), LDAPSearchConstraints.DEREF_ALWAYS);
        String entityKey = LDAPLookupUtils.getFirstAttributeValue(domEntry,
                "cn");
        Logger.msg(7, "DomainPath " + domPath + " is a reference to "
                + entityKey);
        String objClass = LDAPLookupUtils.getFirstAttributeValue(domEntry,
                "objectClass");
    	ItemPath referencedPath = new ItemPath(entityKey);
        if (objClass.equals("cristalagent"))
            return new AgentPath(referencedPath);

        return referencedPath;
    }


    @Override
	public void add(Path path)
        throws ObjectCannotBeUpdated, ObjectAlreadyExistsException
    {
        try {
            checkLDAPContext(path);
            LDAPAttributeSet attrSet = createAttributeSet(path);
            LDAPEntry newEntry = new LDAPEntry(getFullDN(path),attrSet);
            LDAPLookupUtils.addEntry(mLDAPAuth.getAuthObject(),newEntry);
            if (path instanceof DomainPath)
            	Gateway.getProxyServer().sendProxyEvent(new ProxyMessage(null, path.toString(), ProxyMessage.ADDED));
        } catch (LDAPException ex) {
            if (ex.getResultCode() == LDAPException.ENTRY_ALREADY_EXISTS)
                throw new ObjectAlreadyExistsException(ex.getLDAPErrorMessage());
            else
                throw new ObjectCannotBeUpdated(ex.getLDAPErrorMessage());
        }
     }

    //deletes a node
    //throws LDAPexception if node cannot be deleted (eg node is not a leaf)
    @Override
	public void delete(Path path) throws ObjectCannotBeUpdated
    {
        try {
            LDAPLookupUtils.delete(mLDAPAuth.getAuthObject(),getDN(path)+mLocalPath);
        } catch (LDAPException ex) {
            throw new ObjectCannotBeUpdated(ex.getLDAPErrorMessage());
        }
        if (path instanceof DomainPath) {
        	Gateway.getProxyServer().sendProxyEvent(new ProxyMessage(null, path.toString(), ProxyMessage.DELETED));
        }
    }

	//change specs, add boolean alias leaf context
    protected void checkLDAPContext(Path path)
    {
        String dn = getFullDN(path);
        if (!LDAPLookupUtils.exists(mLDAPAuth.getAuthObject(),dn))
        {
            String listDN[] = path.getPath();
            String name = "cn="+ path.getRoot() + "," + mLocalPath;
            int i=0;
            while (i<listDN.length-1)
            {
                name= "cn="+LDAPLookupUtils.escapeDN(listDN[i])+","+name;
                if (!LDAPLookupUtils.exists(mLDAPAuth.getAuthObject(),name))
                {
                    try
                    {
                        //create cristalcontext
                        Logger.msg(8,"LDAPLookup::addLDAPContext() context added " + name);
                        LDAPLookupUtils.createCristalContext(mLDAPAuth.getAuthObject(), name);
                    }
                    catch (Exception ex)
                    {
                        Logger.error("LDAPLookup::addContext() " + ex);
                    }
                }
                i++;
            }
        }
    }
    public void createBootTree()
    {
        Logger.msg(8,"Initializing LDAP Boot tree");

        //create org
        LDAPLookupUtils.createOrganizationContext(mLDAPAuth.getAuthObject(), mGlobalPath);
        //create root
        LDAPLookupUtils.createCristalContext(mLDAPAuth.getAuthObject(), mRootPath);
        //create local
        LDAPLookupUtils.createCristalContext(mLDAPAuth.getAuthObject(), mLocalPath);
    }

    @Override
	public void initializeDirectory() throws ObjectNotFoundException
    {
        createBootTree();
        initTree( Gateway.getResource().getTextResource("ldap", "LDAPboot.txt"));
    }

    public void initTree(String bootFile)
    {
        Logger.msg(8,"Verifying Cristal LDAP roots");
        StringTokenizer strTokenizer = new StringTokenizer(bootFile, "\n\r");
        while (strTokenizer.hasMoreTokens())
        {
            String line = strTokenizer.nextToken();
            Logger.msg(8,"Checking " + line+mLocalPath);
            LDAPLookupUtils.createCristalContext(mLDAPAuth.getAuthObject(), line+mLocalPath);
        }

    }

 	//typically search for cn=barcode
    @Override
	public LDAPPathSet search(Path start, String filter)
    {
    	Logger.msg(8,"LDAPLookup::search() From " + getDN(start) + " for cn=" + filter );
        return search(getFullDN(start),"cn="+LDAPLookupUtils.escapeSearchFilter(filter));
    }
    
    @Override
	public LDAPPathSet search(Path start, Property... props)
    {
    	StringBuffer filter = new StringBuffer();
    	int propCount = 0;
    	for (Property prop: props) {
    		filter.append("(cristalprop="+LDAPLookupUtils.escapeSearchFilter((prop.isMutable()?"":"!")+prop.getName()+
    				":"+prop.getValue())+")");
    		propCount++;
    	}
    	
    	String filterParam;
    	if (propCount == 0)
    		filterParam = "";
    	else if (propCount == 1)
    		filterParam = filter.toString();
    	else
    		filterParam = "(&"+filter.toString()+")";
    	
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_SEARCHING);
        return search(getFullDN(start),LDAPConnection.SCOPE_SUB,filterParam,searchCons);
    }
    
    @Override
	public LDAPPathSet search(Path start, PropertyDescriptionList props) {

    	ArrayList<Property> params = new ArrayList<Property>();
    	for (PropertyDescription propDesc: props.list) {
    		if (propDesc.getIsClassIdentifier())
    			params.add(propDesc.getProperty());
    	}
    	return search(start, params.toArray(new Property[params.size()]));
    }
    
    protected LDAPPathSet search(String startDN, int scope, String filter, LDAPSearchConstraints searchCons)
    {
        Logger.msg(8,"Searching for "+filter+" in "+startDN);
        searchCons.setMaxResults(0);
        String[] attr = { LDAPConnection.ALL_USER_ATTRS };
        try
        {
            LDAPSearchResults res = mLDAPAuth.getAuthObject().search(startDN, scope,
            		filter,attr,false,searchCons);
            return new LDAPPathSet(res, this);
        }
        catch (LDAPException ex)
        {
            Logger.error("LDAPException::LDAPLookup::search() " + ex.toString());
            return new LDAPPathSet(this);
        }
    }
    //typically search for (any filter combination)
    public LDAPPathSet search(String startDN,String filter)
    {
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER);
        return search(startDN,LDAPConnection.SCOPE_SUB,filter,searchCons);
    }
    
    @Override
	public LDAPPathSet searchAliases(ItemPath entity) {
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER);
        return search(getFullDN(new DomainPath()), LDAPConnection.SCOPE_SUB, "(&(objectClass=aliasObject)(aliasedObjectName="+
        LDAPLookupUtils.escapeDN(getFullDN(entity))+"))", searchCons);
    }

    @Override
	public boolean exists(Path path) {
        return LDAPLookupUtils.exists(mLDAPAuth.getAuthObject(), getFullDN(path));
    }

    @Override
	public ItemPath getItemPath(String uuid) throws ObjectNotFoundException, InvalidItemPathException {
        String[] attr = { LDAPConnection.ALL_USER_ATTRS };
        try {
        	ItemPath item = new ItemPath(uuid);
            LDAPEntry anEntry=mLDAPAuth.getAuthObject().read(getDN(item)+mLocalPath,attr);
            String type = LDAPLookupUtils.getFirstAttributeValue(anEntry, "objectClass");
            if (type.equals("cristalentity"))
                return item;
            else if (type.equals("cristalagent"))
                return new AgentPath(item);
            else
                throw new ObjectNotFoundException("Not an entity");

        } catch (LDAPException ex) {
            if (ex.getResultCode() == LDAPException.NO_SUCH_OBJECT)
                throw new ObjectNotFoundException("Entity does not exist");
            Logger.error(ex);
            throw new ObjectNotFoundException("Error getting entity class");
        }
    }

    /** converts an LDAPentry to a Path object
     *  Note that the search producing the entry should have retrieved the attrs
     *  'ior' and 'uniquemember'
     * @throws ObjectNotFoundException
     * @throws ObjectNotFoundException
     * @throws  
     */
    protected Path nodeToPath(LDAPEntry entry) throws InvalidItemPathException, ObjectNotFoundException
    {
        String dn = entry.getDN();
        ItemPath entityKey;
        org.omg.CORBA.Object ior;

        // extract syskey
        try {
        	String entityKeyStr = LDAPLookupUtils.getFirstAttributeValue(entry, "cn");
        	entityKey = new ItemPath(entityKeyStr);
        } catch (ObjectNotFoundException ex) { 
        	entityKey = null;
        } catch (InvalidItemPathException ex) { 
        	entityKey = null;
        }

        // extract IOR
        try {
        	String stringIOR = LDAPLookupUtils.getFirstAttributeValue(entry,"ior");
        	ior = Gateway.getORB().string_to_object(stringIOR);
        } catch (ObjectNotFoundException ex) { 
        	ior = null;
        }
        
        /* Find the right path class */
        Path thisPath;
        if (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","cristalagent"))
        { //cristalagent
            String agentID = LDAPLookupUtils.getFirstAttributeValue(entry,"uid");
            thisPath = new AgentPath(entityKey, agentID);
        }
        else if (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","cristalrole"))
        { //cristalrole
            thisPath = new RolePath(getPathComponents(dn.substring(0, dn.lastIndexOf(mDomainTypeRoot))),
                    LDAPLookupUtils.getFirstAttributeValue(entry, "jobList").equals("TRUE"));
        }
        else if (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","aliasObject") ||
                (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","cristalcontext") && dn.endsWith(mDomainTypeRoot)))
        {
            DomainPath domainPath = new DomainPath();
            domainPath.setPath(getPathComponents(dn.substring(0, dn.lastIndexOf(mDomainTypeRoot))));
            thisPath = domainPath;
        }
        else if (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","cristalentity") ||
                (LDAPLookupUtils.existsAttributeValue(entry,"objectclass","cristalcontext") && dn.endsWith(mItemTypeRoot)))
        {
            if(dn.endsWith(mItemTypeRoot)) {
            	if (entityKey == null) throw new InvalidItemPathException(entry.getDN()+" was not a valid itemPath");
                thisPath = entityKey;
            }
            else
                throw new ObjectNotFoundException("Entity found outside entity tree");
        }
        else
        {
			throw new ObjectNotFoundException("Unrecognised LDAP entry. Not a cristal entry");
        }

        //set IOR if we have one
        if (ior!=null) thisPath.setIOR(ior);
        return thisPath;
    }

	public String getDN(Path path) {
            StringBuffer dnBuffer = new StringBuffer();
            String[] pathComp = path.getPath();
            for (int i=pathComp.length-1; i>=0; i--)
                dnBuffer.append("cn=").append(LDAPLookupUtils.escapeDN(pathComp[i])).append(",");
            dnBuffer.append("cn="+path.getRoot()+",");
            return dnBuffer.toString();
    }

    public String getFullDN(Path path) {
        return getDN(path)+mLocalPath;
    }
    
    public String[] getPathComponents(String dnFragment) {
    	ArrayList<String> newPath = new ArrayList<String>();
        StringTokenizer tok = new StringTokenizer(dnFragment, ",");
        String[] path = new String[tok.countTokens()];
        while (tok.hasMoreTokens()) {
            String nextPath = tok.nextToken();
            if (nextPath.indexOf("cn=") == 0)
                newPath.add(0, LDAPLookupUtils.unescapeDN(nextPath.substring(3)));
            else
                break;
        }
        return newPath.toArray(path);
    }

	@Override
	public Object resolve(Path path) throws ObjectNotFoundException {
		return resolveObject(getFullDN(path));
	}

	@Override
	public Iterator<Path> getChildren(Path path) {
        String filter = "objectclass=*";
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(10);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_FINDING );
        return search(getFullDN(path), LDAPConnection.SCOPE_ONE,filter,searchCons);
	}    
	
	protected LDAPAttributeSet createAttributeSet(Path path) throws ObjectCannotBeUpdated {
        LDAPAttributeSet attrs = new LDAPAttributeSet();
		
		if (path instanceof RolePath) {
			RolePath rolePath = (RolePath)path;
	        attrs.add(new LDAPAttribute("objectclass","cristalrole"));
	        String jobListString = rolePath.hasJobList()?"TRUE":"FALSE";
	        attrs.add(new LDAPAttribute("jobList",jobListString));
	        attrs.add(new LDAPAttribute("cn", rolePath.getName()));
		}
		else if (path instanceof DomainPath) {
			DomainPath domPath = (DomainPath)path;
	        attrs.add(new LDAPAttribute("cn",domPath.getName()));
            try {
				attrs.add(new LDAPAttribute("aliasedObjectName",getFullDN(domPath.getItemPath())));
	            String objectclass_values[] = { "alias", "aliasObject" };
	            attrs.add(new LDAPAttribute("objectclass",objectclass_values));
			} catch (ObjectNotFoundException e) { // no entity - is a context
				attrs.add(new LDAPAttribute("objectclass","cristalcontext"));
			}
		}
		
		else if (path instanceof ItemPath) {
			ItemPath itemPath = (ItemPath)path;
	        attrs.add(new LDAPAttribute("cn", itemPath.getUUID().toString()));
	        if (itemPath.getIOR() != null)
	            attrs.add(new LDAPAttribute("ior", Gateway.getORB().object_to_string(itemPath.getIOR())));
		
	        if (path instanceof AgentPath) {
	        	AgentPath agentPath = (AgentPath)path;
	        	attrs.add(new LDAPAttribute("objectclass","cristalagent"));

	        	String agentName = agentPath.getAgentName();
	        	if (agentName != null && agentName.length() > 0)
	        		attrs.add(new LDAPAttribute("uid", agentName));
	        	else
	        		throw new ObjectCannotBeUpdated("Cannot create agent. No userId specified");

	        	String agentPass = agentPath.getPassword();
	        	if (agentPass != null && agentPass.length() > 0)
	        		try {
	        			attrs.add(new LDAPAttribute("userPassword", AgentPath.generateUserPassword(agentPass, "SHA")));
	        		} catch (NoSuchAlgorithmException ex) {
	        			throw new ObjectCannotBeUpdated("Cryptographic libraries for password hashing not found.");
	        		}
	        	else
	        		throw new ObjectCannotBeUpdated("Cannot create agent. No password given");
	        }
	        else {
	        	attrs.add(new LDAPAttribute("objectclass","cristalentity"));
	        }
		}

        return attrs;

	}
	
    //Creates a cristalRole
    //CristalRole is-a specialized CristalContext which contains multi-valued uniqueMember attribute pointing to cristalagents
    @Override
	public RolePath createRole(RolePath rolePath)
        throws ObjectAlreadyExistsException, ObjectCannotBeUpdated
    {

        // create the role
    	String roleDN = getFullDN(rolePath);
        LDAPEntry roleNode;
        try
        {
        	roleNode = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(rolePath));
            throw new ObjectAlreadyExistsException();
        } catch (ObjectNotFoundException ex) { }

        //create CristalRole if it does not exist
        roleNode = new LDAPEntry(roleDN, createAttributeSet(rolePath));
        try {
            LDAPLookupUtils.addEntry(mLDAPAuth.getAuthObject(),roleNode);
        } catch (LDAPException e) {
            throw new ObjectCannotBeUpdated(e.getLDAPErrorMessage());
        }
        return rolePath;


    }
    public void deleteRole(RolePath role) throws ObjectNotFoundException, ObjectCannotBeUpdated {
        try {
            LDAPLookupUtils.delete(mLDAPAuth.getAuthObject(), getFullDN(role));
        } catch (LDAPException ex) {
            throw new ObjectCannotBeUpdated("Could not remove role");
        }
    }

    @Override
	public void addRole(AgentPath agent, RolePath role)
            throws ObjectCannotBeUpdated, ObjectNotFoundException
    {
        LDAPEntry roleEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(role));
        //add memberDN to uniqueMember if it is not yet a member
        if (!LDAPLookupUtils.existsAttributeValue(roleEntry, "uniqueMember", getFullDN(agent)))
            LDAPLookupUtils.addAttributeValue(mLDAPAuth.getAuthObject(), roleEntry, "uniqueMember", getFullDN(agent));
        else
            throw new ObjectCannotBeUpdated("Agent " + agent.getAgentName() + " already has role " + role.getName());
    }

    @Override
	public void removeRole(AgentPath agent, RolePath role)
        throws ObjectCannotBeUpdated, ObjectNotFoundException
    {
    	LDAPEntry roleEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(role));
    	if (LDAPLookupUtils.existsAttributeValue(roleEntry, "uniqueMember", getFullDN(agent)))
   			LDAPLookupUtils.removeAttributeValue(mLDAPAuth.getAuthObject(), roleEntry, "uniqueMember", getFullDN(agent));
    	else
    		throw new ObjectCannotBeUpdated("Agent did not have that role");
    }

    @Override
	public boolean hasRole(AgentPath agent, RolePath role) {
        String filter = "(&(objectclass=cristalrole)(uniqueMember="+getFullDN(agent)+")(cn="+role.getName()+"))";
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER );
        return search(mRolePath,LDAPConnection.SCOPE_SUB,filter,searchCons).hasNext();
    }

    @Override
	public AgentPath[] getAgents(RolePath role)
        throws ObjectNotFoundException
    {
    	//get the roleDN entry, and its uniqueMember entry pointing to
    	LDAPEntry roleEntry;
        try {
            roleEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(role));
        } catch (ObjectNotFoundException e) {
            throw new ObjectNotFoundException("Role does not exist");
        }

    	String[] res = LDAPLookupUtils.getAllAttributeValues(roleEntry,"uniqueMember");
    	ArrayList<AgentPath> agents = new ArrayList<AgentPath>();
    	for (String userDN : res) {
    		try {
    			LDAPEntry userEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), userDN);
    		    AgentPath path = (AgentPath)nodeToPath(userEntry);
                agents.add(path);
    		} catch (ObjectNotFoundException ex) {
                Logger.error("Agent "+userDN+" does not exist");
    		} catch (InvalidItemPathException ex) {
                Logger.error("Agent "+userDN+" is not a valid entity");
    		}
    	}
        AgentPath[] usersList = new AgentPath[0];
        usersList = agents.toArray(usersList);
    	return usersList;
    }

    //returns the role/s of a user
    @Override
	public RolePath[] getRoles(AgentPath agentPath)
    {
    	//search the mDomainPath tree uniqueMember=userDN
    	//filter = objectclass=cristalrole AND uniqueMember=userDN
        String filter = "(&(objectclass=cristalrole)(uniqueMember="+getFullDN(agentPath)+"))";
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER );
    	Iterator<?> roles = search(mRolePath,LDAPConnection.SCOPE_SUB,filter,searchCons);
        ArrayList<RolePath> roleList = new ArrayList<RolePath>();

    	while(roles.hasNext())
    	{
            RolePath path = (RolePath) roles.next();
   			roleList.add(path);
    	}
        RolePath[] roleArr = new RolePath[roleList.size()];
        roleArr = roleList.toArray(roleArr);
        return roleArr;
    }

    /**
     * Utility for looking up a login name
     *
     * @param ld
     * @param agentName
     * @param baseDN
     * @return
     * @throws ObjectNotFoundException
     */
    @Override
	public AgentPath getAgentPath(String agentName) throws ObjectNotFoundException
    {
        //search to get the userDN equivalent of the userID
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER );
        String filter = "(&(objectclass=cristalagent)(uid="+agentName+"))";
        Iterator<Path> res = search(mItemTypeRoot,LDAPConnection.SCOPE_SUB,filter,searchCons);
        if (!res.hasNext())
            throw new ObjectNotFoundException("Agent not found: "+agentName);
        Path result = res.next();
        if (result instanceof AgentPath)
            return (AgentPath)result;
        else
            throw new ObjectNotFoundException("Entry was not an Agent");
    }

    @Override
	public RolePath getRolePath(String roleName) throws ObjectNotFoundException
    {
        LDAPSearchConstraints searchCons = new LDAPSearchConstraints();
        searchCons.setBatchSize(0);
        searchCons.setDereference(LDAPSearchConstraints.DEREF_NEVER );
        String filter = "(&(objectclass=cristalrole)(cn="+roleName+"))";
		Iterator<Path> res = search(mRolePath,LDAPConnection.SCOPE_SUB,filter,searchCons);
		if (!res.hasNext())
            throw new ObjectNotFoundException("Role not found");
        Path result = res.next();
        if (result instanceof RolePath)
            return (RolePath)result;
        else
            throw new ObjectNotFoundException("Entry was not a Role");
    }

	@Override
	public void setHasJobList(RolePath role, boolean hasJobList) throws ObjectNotFoundException, ObjectCannotBeUpdated {
		// get entry
		LDAPEntry roleEntry;
        try {
            roleEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(role));
        } catch (ObjectNotFoundException e) {
            throw new ObjectNotFoundException("Role does not exist");
        }
		// set attribute
        LDAPLookupUtils.setAttributeValue(mLDAPAuth.getAuthObject(), roleEntry, "jobList", hasJobList?"TRUE":"FALSE");
	}
	
	@Override
	public void setAgentPassword(AgentPath agent, String newPassword) throws ObjectNotFoundException, ObjectCannotBeUpdated, NoSuchAlgorithmException {
		String encPasswd = AgentPath.generateUserPassword(newPassword, "SHA");
		LDAPEntry agentEntry;
        try {
        	agentEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(agent));
        } catch (ObjectNotFoundException e) {
            throw new ObjectNotFoundException("Agent "+agent.getAgentName()+" does not exist");
        }
		LDAPLookupUtils.setAttributeValue(mLDAPAuth.getAuthObject(), agentEntry, "userPassword", encPasswd);
		
	}

	@Override
	public String getAgentName(AgentPath agentPath)
			throws ObjectNotFoundException {
        LDAPEntry agentEntry = LDAPLookupUtils.getEntry(mLDAPAuth.getAuthObject(), getFullDN(agentPath));
        return LDAPLookupUtils.getFirstAttributeValue(agentEntry,"uid");
	}

}