workspace-explorer/src/main/java/org/gcube/portlets/widgets/wsexplorer/server/WorkspaceExplorerServiceImpl.java

package org.gcube.portlets.widgets.wsexplorer.server;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.common.portal.PortalContext;
import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
import org.gcube.common.storagehub.client.proxies.WorkspaceManagerClient;
import org.gcube.common.storagehub.model.items.FolderItem;
import org.gcube.common.storagehub.model.items.Item;
import org.gcube.common.storagehub.model.items.SharedFolder;
import org.gcube.common.storagehub.model.items.VreFolder;
import org.gcube.portlets.widgets.wsexplorer.client.WorkspaceExplorerConstants;
import org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService;
import org.gcube.portlets.widgets.wsexplorer.server.stohub.Whorespace;
import org.gcube.portlets.widgets.wsexplorer.shared.FilterCriteria;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemCategory;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemDTO;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemInterface;
import org.gcube.portlets.widgets.wsexplorer.shared.ItemType;
import org.gcube.portlets.widgets.wsexplorer.shared.SearchedFolder;
import org.gcube.portlets.widgets.wsexplorer.shared.WorkspaceNavigatorServiceException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;


/**
 * The Class WorkspaceExplorerServiceImpl.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * @author Massimiliano Assante, CNR-ISTI
 */
@SuppressWarnings("serial")
public class WorkspaceExplorerServiceImpl extends RemoteServiceServlet implements WorkspaceExplorerService {

	public static final Logger logger = LoggerFactory.getLogger(WorkspaceExplorerServiceImpl.class);
	/**
	 * {@inheritDoc}
	 */
	@Override
	public ItemDTO getRoot(List<ItemType> showableTypes, boolean purgeEmpyFolders, FilterCriteria filterCriteria) throws WorkspaceNavigatorServiceException {
		logger.trace("getRoot showableTypes: "+showableTypes+" purgeEmpyFolders: "+purgeEmpyFolders+" filterCriteria: "+ filterCriteria);

		try {
			PortalContext pContext = PortalContext.getConfiguration();
			String userName = pContext.getCurrentUser(getThreadLocalRequest()).getUsername();
			String scope = pContext.getCurrentScope(getThreadLocalRequest());
			String authorizationToken = pContext.getCurrentUserToken(scope, userName);
			SecurityTokenProvider.instance.set(authorizationToken);
			
			logger.trace("Start getRoot...");
			Item root = Whorespace.getRoot(getThreadLocalRequest());

			logger.trace("GetRoot  - Replyiing root");
			long startTime = System.currentTimeMillis();
			logger.trace("start time - " + startTime);

			ItemDTO rootItem = ItemBuilder.getItem(null, root, root.getPath(), showableTypes, filterCriteria, true, false);
			rootItem.setName(WorkspaceExplorerConstants.HOME_LABEL);
			rootItem.setIsRoot(true);

			if (purgeEmpyFolders) {
				rootItem = ItemBuilder.purgeEmptyFolders(rootItem);
			}

			logger.trace("Returning:");
			Long endTime = System.currentTimeMillis() - startTime;
			logger.debug("end time - " + String.format("%d msc %d sec", endTime - startTime, TimeUnit.MILLISECONDS.toSeconds(endTime)));

			Collections.sort(rootItem.getChildren(), new ItemComparator());
			logger.info("Returning children size: "+rootItem.getChildren().size());

			return rootItem;

		} catch (Exception e) {
			logger.error("Error during root retrieving", e);
			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get root");
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public ItemDTO getFolder(ItemInterface item, List<ItemType> showableTypes, boolean purgeEmpyFolders, FilterCriteria filterCriteria, boolean loadGcubeProperties) throws WorkspaceNavigatorServiceException {
		logger.trace("getFolder folderId: "+item.getId()+" showableTypes: "+showableTypes+" purgeEmpyFolders: "+purgeEmpyFolders+" filterCriteria: "+filterCriteria);

		try {

			PortalContext pContext = PortalContext.getConfiguration();
			String userName = pContext.getCurrentUser(getThreadLocalRequest()).getUsername();
			String scope = pContext.getCurrentScope(getThreadLocalRequest());
			String authorizationToken = pContext.getCurrentUserToken(scope, userName);
			SecurityTokenProvider.instance.set(authorizationToken);	
			Item folder = Whorespace.getItem(getThreadLocalRequest(), item.getId());
			logger.trace("GetFolder - Replying folder");
			
			//TO AVOID SLOW CALL getPATH()
			String folderPath = item.getPath()!=null && !item.getPath().isEmpty()?item.getPath():folder.getPath();
			ItemDTO itemFolder = ItemBuilder.getItem(null, folder, folderPath, showableTypes, filterCriteria, true, loadGcubeProperties);
//			_log.trace("Only showable types:");

			if (purgeEmpyFolders) {
				itemFolder = ItemBuilder.purgeEmptyFolders(itemFolder);
			}

			Collections.sort(itemFolder.getChildren(), new ItemComparator());
			logger.info("Returning children size: "+itemFolder.getChildren().size());

			return itemFolder;

		} catch (Exception e) {
			logger.error("Error during folder retrieving", e);
			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get folder");
		}
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#getItemByCategory(org.gcube.portlets.widgets.wsexplorer.shared.ItemCategory)
	 */
	/**
	 * Gets the item by category.
	 *
	 * @param category the category
	 * @return the item by category
	 * @throws WorkspaceNavigatorServiceException the workspace navigator service exception
	 */
	@Override
	public ItemDTO getItemByCategory(ItemCategory category) throws WorkspaceNavigatorServiceException{
		logger.trace("GetItemByCategory category: "+category);
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(getThreadLocalRequest()).getUsername();
		String scope = pContext.getCurrentScope(getThreadLocalRequest());
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		SecurityTokenProvider.instance.set(authorizationToken);

		try {
	
			ItemDTO item = null;

			switch(category){
				case HOME:{
					Item root = Whorespace.getRoot(getThreadLocalRequest());
					String fullName = pContext.getCurrentUser(getThreadLocalRequest()).getFullname();
					if(fullName.indexOf(" ")>0){
						fullName = fullName.substring(0, fullName.indexOf(" "));
					}else if(fullName.indexOf(".")>0){
						fullName = fullName.substring(0, fullName.indexOf("."));
					}
					item = new ItemDTO(null, root.getId(), fullName+"'s", ItemType.FOLDER, root.getPath(), root.getOwner(), null, true, true);
					break;
				}
				case VRE_FOLDER:{
					String vreFolderId = Whorespace.getVREFoldersId(getThreadLocalRequest());
					Item folder = Whorespace.getItem(getThreadLocalRequest(), vreFolderId);
					item = new ItemDTO(null, folder.getId(), WorkspaceExplorerConstants.VRE_FOLDERS_LABEL, ItemType.FOLDER, folder.getPath(), folder.getOwner(), null, true, false);
					//SET SPECIAL FOLDER  /Workspace/MySpecialFolders
					item.setSpecialFolder(true);
					break;
				}
			}
			return item;
		} catch (Exception e) {
			logger.error("Error during get item by category", e);
			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get item by category");
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public ItemDTO getMySpecialFolder(List<ItemType> showableTypes, boolean purgeEmpyFolders, FilterCriteria filterCriteria) throws WorkspaceNavigatorServiceException {
		logger.trace("GetMySpecialFolder showableTypes: "+showableTypes+" purgeEmpyFolders: "+purgeEmpyFolders+" filterCriteria: "+filterCriteria);

		try {
			PortalContext pContext = PortalContext.getConfiguration();
			String userName = pContext.getCurrentUser(getThreadLocalRequest()).getUsername();
			String scope = pContext.getCurrentScope(getThreadLocalRequest());
			String authorizationToken = pContext.getCurrentUserToken(scope, userName);
			SecurityTokenProvider.instance.set(authorizationToken);
			String vreFolderId = Whorespace.getVREFoldersId(getThreadLocalRequest());
			Item folder = Whorespace.getItem(getThreadLocalRequest(), vreFolderId);

			long startTime = System.currentTimeMillis();
			logger.trace("start time - " + startTime);

			ItemDTO itemFolder = ItemBuilder.getItem(null, folder, folder.getPath(), showableTypes, filterCriteria, true, false);
			//OVERRIDING VRE FOLDERS NAME - SET SPECIAL FOLDER  /Workspace/MySpecialFolders
			itemFolder.setName(WorkspaceExplorerConstants.VRE_FOLDERS_LABEL);
			itemFolder.setSpecialFolder(true);

			logger.trace("Builded MySpecialFolder: "+itemFolder);

			logger.trace("Only showable types:");
			//printName("", folderItem);

			if (purgeEmpyFolders) {
				itemFolder = ItemBuilder.purgeEmptyFolders(itemFolder);
			}

			logger.trace("Returning:");

			Long endTime = System.currentTimeMillis() - startTime;
			String time = String.format("%d msc %d sec", endTime, TimeUnit.MILLISECONDS.toSeconds(endTime));
			logger.trace("end time - " + time);

			//printName("", folderItem);
			Collections.sort(itemFolder.getChildren(), new ItemComparator());
			return itemFolder;

		} catch (Exception e) {
			logger.error("Error during special folders retrieving", e);
			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get My Special Folder");
		}
	}


	/**
	 * {@inheritDoc}
	 */
	@Override
	public boolean checkName(String name) throws WorkspaceNavigatorServiceException {
		logger.warn("checkName name NOT IMPLEMENTED: "+name);
		return true; //TODO:
	}

	/*protected void printName(String indentation, Item item)
	{
		if(item!=null){
			_log.trace(indentation+item.getName());
			for (Item child:item.getChildren()) printName(indentation+"\t", child);
		}
	}*/

	/**
	 * Gets Breadcrumbs (the list of parents) by item identifier.
	 *
	 * @param itemIdentifier the item identifier
	 * @param includeItemAsParent -  if parameter is true and item passed in input is a folder, the folder is included in path returned as last parent
	 * @return the list parents by item identifier
	 * @throws Exception the exception
	 */
	@Override
	public List<ItemDTO> getBreadcrumbsByItemIdentifier(String itemIdentifier, boolean includeItemAsParent) throws Exception {
		logger.trace("ListParents By Item Identifier "+ itemIdentifier);
		try {

			Item wsItem = Whorespace.getItem(getThreadLocalRequest(), itemIdentifier);
			logger.trace("workspace retrieve item name: "+wsItem.getName());
			List<Item> parents = new ArrayList<>();		
			Item whileItem = wsItem;
			while (whileItem.getParentId() != null) {
				parents.add(whileItem);
				whileItem = Whorespace.getItem(getThreadLocalRequest(), whileItem.getParentId());
			}
		//	List<Item> parents = workspace.getParentsById(itemIdentifier);
			logger.trace("parents size: "+parents.size());
			ItemDTO[] arrayParents;			
			if(includeItemAsParent==true && wsItem instanceof FolderItem){
				arrayParents = new ItemDTO[parents.size()];
				arrayParents[parents.size()-1] = ItemBuilder.buildFolderForBreadcrumbs((FolderItem) wsItem, null);
			}
			else {
				arrayParents = new ItemDTO[parents.size()-1];
			}

			/** HANDLE MY_SPECIAL_FOLDER TO AVOID COMPLETE PATH WORKSPACE/MY_SPECIAL_FOLDER
			 * BUT RETURNING ONLY /MY_SPECIAL_FOLDER
			 */
			if(wsItem instanceof FolderItem){
				if(ItemBuilder.isSpecialFolder((FolderItem) wsItem)){
					return new ArrayList<ItemDTO>(Arrays.asList(arrayParents));
				}
			}

			//CONVERTING PATH
			logger.trace("converting path from second-last..");
			for (int i =  parents.size()-2; i >= 0; i--) {
				FolderItem wsParentFolder = (FolderItem) parents.get(i);
				arrayParents[i] = ItemBuilder.buildFolderForBreadcrumbs(wsParentFolder, null);
				if(arrayParents[i].isSpecialFolder()){ //SKIP HOME PARENT FOR MY_SPECIAL_FOLDER
					logger.info("arrayParents index "+i+" is special folder, exit");
					break;
				}
			}

			//SET PARENTS
			logger.trace("setting parents..");
			for(int i=0; i<arrayParents.length-1; i++){

				ItemDTO parent = arrayParents[i];
				ItemDTO fileModel = arrayParents[i+1];
				fileModel.setParent(parent);
			}

			logger.trace("ListParents return size: "+arrayParents.length);
			if(arrayParents[0]==null){ //EXIT BY BREAK IN CASE OF SPECIAL FOLDER
				List<ItemDTO> breadcrumbs = new ArrayList<ItemDTO>(arrayParents.length-1);
				for (int i=1; i<arrayParents.length; i++) {
					breadcrumbs.add(arrayParents[i]);
				}
				return breadcrumbs;
			}
			else {
				return new ArrayList<ItemDTO>(Arrays.asList(arrayParents));
			}

		} catch (Exception e) {
			logger.error("Error in get List Parents By Item Identifier ", e);
			throw new Exception("Sorry, an error occurred during path retrieving!");
		}
	}

	/**
	 * Gets the parents by item identifier to limit.
	 *
	 * @param itemIdentifier            the item identifier
	 * @param parentLimit the parent limit
	 * @param includeItemAsParent            the include item as parent
	 * @return the parents by item identifier to limit
	 * @throws Exception             the exception
	 */
	@Override
	public List<ItemDTO> getBreadcrumbsByItemIdentifierToParentLimit(String itemIdentifier, String parentLimit, boolean includeItemAsParent) throws Exception {
		logger.trace("getBreadcrumbsByItemIdentifierToParentLimit by Item Identifier " + itemIdentifier +" and limit: "+parentLimit);
		try {

			Item wsItem = Whorespace.getItem(getThreadLocalRequest(), itemIdentifier);
			logger.trace("workspace retrieve item name: "+wsItem.getName());
			List<Item> parents = new ArrayList<>();		
			Item whileItem = wsItem;
			while (whileItem.getParentId() != null) {
				parents.add(whileItem);
				whileItem = Whorespace.getItem(getThreadLocalRequest(), whileItem.getParentId());
			}
			logger.trace("workspace retrieve item name: "+wsItem.getName());
			//List<WorkspaceItem> parents = workspace.getParentsById(itemIdentifier);
			logger.trace("parents size: "+parents.size());
			ItemDTO[] arrayParents;

			if(includeItemAsParent==true &&  wsItem instanceof FolderItem){
				arrayParents = new ItemDTO[parents.size()];
				arrayParents[parents.size()-1] = ItemBuilder.buildFolderForBreadcrumbs((FolderItem) wsItem, null);
			}
			else {
				arrayParents = new ItemDTO[parents.size()-1];
			}

			parentLimit = parentLimit!=null?parentLimit:"";

			/** HANDLE MY_SPECIAL_FOLDER TO AVOID COMPLETE PATH WORKSPACE/MY_SPECIAL_FOLDER
			 * BUT RETURNING ONLY /MY_SPECIAL_FOLDER
			 */
			if( wsItem instanceof FolderItem){
				if(ItemBuilder.isSpecialFolder((FolderItem) wsItem)){
					logger.debug("item id is special folder, returning");
					return new ArrayList<ItemDTO>(Arrays.asList(arrayParents));
				}

				if(itemIdentifier.compareTo(parentLimit)==0){
					logger.debug("item and parent limit are identical element, returning");
					return new ArrayList<ItemDTO>(Arrays.asList(arrayParents));
				}

			}

			//CONVERTING PATH
			logger.trace("converting path from second-last..");
			for (int i =  parents.size()-2; i >= 0; i--) {
				FolderItem wsParentFolder = (FolderItem) parents.get(i);
				arrayParents[i] = ItemBuilder.buildFolderForBreadcrumbs(wsParentFolder, null);
				if(arrayParents[i].isSpecialFolder()){ //SKIP HOME PARENT FOR MY_SPECIAL_FOLDER
					logger.info("arrayParents index "+i+" is special folder, break");
					break;
				}else if(parentLimit.compareTo(arrayParents[i].getId())==0){
					logger.info("reached parent limit "+parentLimit+", break");
					break;
				}
			}

			//SET PARENTS
			logger.trace("setting parents..");
			for(int i=0; i<arrayParents.length-1; i++){

				ItemDTO parent = arrayParents[i];
				ItemDTO fileModel = arrayParents[i+1];

				if(fileModel!=null) {
					fileModel.setParent(parent);
				}
			}

			logger.trace("ListParents return size: "+arrayParents.length);
			if(arrayParents[0]==null){ //EXIT BY BREAK IN CASE OF SPECIAL FOLDER OR REACHED PARENT LIMIT
				List<ItemDTO> breadcrumbs = new ArrayList<ItemDTO>();
				for (int i=1; i<arrayParents.length; i++) {
					if(arrayParents[i]!=null) {
						breadcrumbs.add(arrayParents[i]);
					}
				}
				return breadcrumbs;
			}
			else {
				return new ArrayList<ItemDTO>(Arrays.asList(arrayParents));
			}

		} catch (Exception e) {
			logger.error("Error in get List Parents By Item Identifier ", e);
			throw new Exception("Sorry, an error occurred during path retrieving!");
		}
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#loadSizeByItemId(java.lang.String)
	 */
	/**
	 * Gets the size by item id.
	 *
	 * @param itemId the item id
	 * @return the size by item id
	 * @throws Exception the exception
	 */
	@Override
	public Long getSizeByItemId(String itemId) throws Exception {
		//TODO: implementation missing
		return 0L;
//		logger.info("get Size By ItemId "+ itemId);
//		try {
//
//			Workspace workspace = getWorkspace();
//			WorkspaceItem wsItem = workspace.getItem(itemId);
//			Long size = new Long(-1);
//
//			if(wsItem instanceof FolderItem){ //ITEM
//				FolderItem folderItem = (FolderItem) wsItem;
//				size = new Long(folderItem.getLength());
//			} else if (wsItem instanceof WorkspaceFolder ){ //FOLDER
//				WorkspaceFolder theFolder = (WorkspaceFolder) wsItem;
//				size = theFolder.getSize();
//			} else if (wsItem instanceof WorkspaceSharedFolder){ //SHARED FOLDER
//				WorkspaceSharedFolder theFolder = (WorkspaceSharedFolder) wsItem;
//				size = theFolder.getSize();
//			}
//			logger.info("returning size: " +size);
//			return size;
//
//		} catch (Exception e) {
//			logger.error("get Size By ItemId ", e);
//			throw new Exception(e.getMessage());
//		}
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#getMimeType(java.lang.String)
	 */
	/**
	 * Gets the mime type.
	 *
	 * @param itemId the item id
	 * @return the mime type
	 * @throws Exception the exception
	 */
	@Override
	public String getMimeType(String itemId) throws Exception {

		logger.info("get MimeType By ItemId "+ itemId);
		try {
			Item wsItem = Whorespace.getItem(getThreadLocalRequest(), itemId);
			logger.trace("workspace retrieve item name: "+wsItem.getName());
	

			if(! (wsItem instanceof FolderItem)) {
				return null;
			}

			FolderItem folderItem = (FolderItem) wsItem;
			//TODO:folderItem.getMimeType(); 
			return "unknown";

		} catch (Exception e) {
			logger.error("get MimeType By ItemId ", e);
			throw new Exception(e.getMessage());
		}
	}


	/**
	 * Gets the user acl for folder id.
	 *
	 * @param folderId the folder id
	 * @return the user acl for folder id
	 * @throws Exception the exception
	 */
	@Override
	public String getUserACLForFolderId(String folderId) throws Exception{
		try {
			logger.info("Get user ACL to FOLDER id: "+folderId);
			Item wsItem = Whorespace.getItem(getThreadLocalRequest(), folderId);
			logger.trace("workspace retrieve item name: "+wsItem.getName());

			if(!isASharedFolder(wsItem, false)) {
				return "OWNER";
			}
			else {
				return "NOT IMPLEMENTED";//TODO
			}
		} catch (Exception e) {
			logger.error("Error in server get UserACLForFolderId", e);
			String error = "An error occurred when getting ACL rules for selected folder. "+e.getMessage();
			throw new Exception(error);
		}
	}


	/**
	 * Checks if is a shared folder.
	 *
	 * @param item the item
	 * @param asRoot the as root
	 * @return true, if is a shared folder
	 */
	private boolean isASharedFolder(Item item, boolean asRoot){
		try {
			if (item instanceof SharedFolder || item instanceof VreFolder) {
				SharedFolder folder = (SharedFolder) item;
				if (folder.isVreFolder())
					return true;
				return true;
			} else if (item instanceof FolderItem) {
				return false;
			}
			return false;
		}catch(Exception e){
			logger.error("Error in server isASharedFolder", e);
			return false;
		}
	}


	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#getFormattedSizeByItemId(java.lang.String, org.gcube.portlets.widgets.wsexplorer.shared.SizeFormatter)
	 */
	/**
	 * Gets the readable size by item id.
	 *
	 * @param itemId the item id
	 * @return the readable size by item id
	 * @throws Exception the exception
	 */
	@Override
	public String getReadableSizeByItemId(String itemId) throws Exception {

		try{
		logger.info("getFormattedSize ByItemId "+ itemId);
				long size = getSizeByItemId(itemId);
				return StringUtil.readableFileSize(size);
		} catch (Exception e) {
			logger.error("getFormattedSize By ItemId ", e);
			throw new Exception(e.getMessage());
		}
	}

	/**
	 * Creates the folder.
	 *
	 * @param nameFolder the name folder
	 * @param description the description
	 * @param parentId the parent id
	 * @return the item
	 * @throws Exception the exception
	 */
	@Override
	public ItemDTO createFolder(String nameFolder, String description, String parentId) throws Exception {

		logger.debug("creating folder: "+nameFolder +", parent id: "+parentId);
		//TODO
		return null;
//		try {
//
//			if(parentId==null || parentId.isEmpty())
//				throw new Exception("Parent id is null or empty");
//
//			if(nameFolder == null)
//				nameFolder = "Empty Folder";
//
//			Workspace workspace = getWorkspace();
//			WorkspaceFolder wsFolder = workspace.createFolder(nameFolder, description, parentId);
//
////			_log.info("Path returned by HL: "+wsFolder.getPath());
//
//			List<ItemType> allTypes = Arrays.asList(ItemType.values());
//
//			ItemDTO parent = null;
//			try{
//				String parentPath = wsFolder.getParent()!=null?wsFolder.getParent().getPath():"";
//				parent = ItemBuilder.getItem(null, wsFolder.getParent(), parentPath, allTypes, null, false, false);
//			}catch(Exception e){
//				logger.error("Get parent thown an exception, is it the root id? "+parentId);
//			}
//
//			//TODO PATCH TO AVOID PROBLEM ON GETPATH. FOR EXAMPLE WHEN PARENT IS ROOT
//			String itemPath = null;
//			try{
//				itemPath = wsFolder.getPath();
//				logger.info("itemPath: "+itemPath);
//			}catch(Exception e){
//				logger.error("Get path thrown an exception, for id: "+wsFolder.getId() +" name: "+wsFolder.getName(), e);
////				itemPath= wsFolder.isFolder()?workspace.getRoot().getPath()+"/"+wsFolder.getName():workspace.getRoot().getPath();
//				//PATCH TO RETURN ABSOLUTE PATH
//				itemPath= workspace.getRoot().getPath()+"/"+wsFolder.getName();
//				logger.warn("returning base path: "+itemPath);
//			}
//
//			return ItemBuilder.getItem(parent, wsFolder, itemPath, allTypes, null, false, false);
//
//		} catch(InsufficientPrivilegesException e){
//			String error = "Insufficient Privileges to create the folder";
//			logger.error(error, e);
//			throw new Exception(error);
//		} catch (ItemAlreadyExistException e) {
//			String error = "An error occurred on creating folder, "  +e.getMessage();
//			logger.error(error, e);
//			throw new Exception(error);
//		} catch (Exception e) {
//			String error = "An error occurred on the sever during creating folder. Try again";
//			logger.error(error, e);
//			throw new Exception(error);
//		}

	}


	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#getGcubePropertiesForWorspaceId(java.lang.String)
	 */
	/**
	 * Gets the gcube properties for worspace id.
	 *
	 * @param id the id
	 * @return the gcube properties for worspace id
	 * @throws Exception the exception
	 */
	@Override
	public Map<String, String> getGcubePropertiesForWorspaceId(String id) throws Exception {
		logger.trace("getGcubePropertiesForWorspaceId "+id);
		//TODO
				return null;
//		try {
//
//			if(id==null || id.isEmpty()){
//				logger.info(id +" is null or empty returing empty map as GcubeProperties");
//				return new HashMap<String, String>(1);
//			}
//
//			Workspace workspace = getWorkspace();
//			WorkspaceItem item = workspace.getItem(id);
//
//			return ItemBuilder.getGcubePropertiesForItem(item);
//
//		} catch (Exception e) {
//			logger.error("Error during folder retrieving", e);
//			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get folder");
//		}
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.rpc.WorkspaceExplorerService#getFolder(org.gcube.portlets.widgets.wsexplorer.shared.Item, java.util.List, boolean, org.gcube.portlets.widgets.wsexplorer.shared.FilterCriteria, boolean, int, int)
	 */
	@Override
	public SearchedFolder getFolder(
		ItemDTO item, List<ItemType> showableTypes, boolean purgeEmpyFolders,
		FilterCriteria filterCriteria, boolean loadGcubeProperties,
		final int startIndex, final int limit, final int serverStartIndex) throws WorkspaceNavigatorServiceException {

		logger.trace("getFolder folderId: "+item.getId()+" showableTypes: "+showableTypes+" purgeEmpyFolders: "+purgeEmpyFolders+" filterCriteria: "+filterCriteria);

		try {

			Item folder = Whorespace.getItem(getThreadLocalRequest(), item.getId());
			
			int searchStartIndex = startIndex < serverStartIndex? serverStartIndex : startIndex;
			//logger.trace("GetFolder - Replyiing folder");
			logger.debug("MyLg getFolder searchIndex: "+searchStartIndex+", limit: "+limit);
			//long startTime = System.currentTimeMillis();
			//logger.trace("start time - " + startTime);

			//TO AVOID SLOW CALL getPATH()
			String folderPath = item.getPath()!=null && !item.getPath().isEmpty()?item.getPath():folder.getPath();
			ItemDTO itemFolderToReturn = ItemBuilder.getItem(null, folder, folderPath, showableTypes, filterCriteria, true, loadGcubeProperties, searchStartIndex, limit);

			SearchedFolder sf = new SearchedFolder(itemFolderToReturn, startIndex, limit, searchStartIndex, false);
			int currentListCount = sf.getFolder().getChildren().size();
			logger.debug("MyLg Total item returning is: "+currentListCount);

			FolderItem hlFolder = (FolderItem) folder;
			int folderChildrenCount = Whorespace.getItemChildrenCount(getThreadLocalRequest(), hlFolder.getId());
			logger.debug("MyLg Folder children count is: "+folderChildrenCount);

			if(currentListCount == limit || folderChildrenCount==0){
				logger.debug("Page completed returning "+currentListCount+ " items");
				int offset = searchStartIndex+limit;
				Collections.sort(sf.getFolder().getChildren(), new ItemComparator());
				sf.setServerSearchFinished(offset>folderChildrenCount || folderChildrenCount == 0);
				logger.debug("is Search finished: "+sf.isServerSearchFinished());
				return sf;
			}

			ArrayList<ItemDTO> childrenToReturn = new ArrayList<ItemDTO>(limit);
			childrenToReturn.addAll(sf.getFolder().getChildren());

			int offsetStartIndex = searchStartIndex;
			boolean pageOffsetOut = false;
			while(currentListCount < limit && !sf.isServerSearchFinished() && !pageOffsetOut){ //&& SEARCH NOT ULTIMATED
				logger.debug("MyLg new WHILE Items count: "+currentListCount+" is less than limit..");

				int newstartIndex = offsetStartIndex+limit+1;
				logger.debug("MyLg NewStartIndex is startIndex+limit: "+newstartIndex);

				//THERE ARE OTHER CHILDREN OVER NEW START INDEX
				if(newstartIndex < folderChildrenCount){
					//newLimit = limit - childrenToReturn.size();
					logger.debug("MyLg getting items with index start: "+newstartIndex + ", limit: "+limit);
					ItemDTO newItemFolder = ItemBuilder.getItem(null, folder, folderPath, showableTypes, filterCriteria, true, loadGcubeProperties, newstartIndex, limit);
					int diff = limit - currentListCount; //How items are remaining
					//int offset = 0;
					logger.debug("MyLg new search start: "+newstartIndex + ", diff: "+diff+ ", retrieved: "+newItemFolder.getChildren().size());
					if(diff >= newItemFolder.getChildren().size()){
						logger.debug("MyLg Adding sublist from 0 to 'diff' "+diff+" to children");
						childrenToReturn.addAll(newItemFolder.getChildren().subList(0, newItemFolder.getChildren().size()));
						//offset = diff;
					}else{
						logger.debug("MyLg PageOffsetOut, the sublist size: "+newItemFolder.getChildren().size()+ " is greather than (limit-currentListCount)"+diff+" leaving WHILE...");
						//childrenToReturn.addAll(newItemFolder.getChildren().subList(0, newItemFolder.getChildren().size()));
						//offset = newItemFolder.getChildren().size();
						pageOffsetOut = true;
					}
					offsetStartIndex = newstartIndex;
					currentListCount = childrenToReturn.size();
					//int realServerEndIndex = newstartIndex+offset;
					logger.debug("MyLg New items count is: "+currentListCount + " serverEndIndex: "+offsetStartIndex);
					sf.setServerEndIndex(offsetStartIndex);
				}else{
					logger.debug("MyLg New start index (oldStartIndex+limit) is grather than folder children count, search is finished");
					sf.setServerSearchFinished(true);
				}
			}

			sf.getFolder().setChildren(childrenToReturn);
			//sf.setServerEndIndex(sf.getServerEndIndex());

			if (purgeEmpyFolders) {
				itemFolderToReturn = ItemBuilder.purgeEmptyFolders(sf.getFolder());
			}

			//logger.debug("Returning: "+itemFolder.getChildren().size() + " items");
			//Long endTime = System.currentTimeMillis() - startTime;
			//String time = String.format("%d msc %d sec", endTime, TimeUnit.MILLISECONDS.toSeconds(endTime));
			//logger.debug("end time - " + time);

//			int i = 0;
//			for (Item item2 : sf.getFolder().getChildren()) {
//				logger.debug(++i+") "+item2);
//			}

			Collections.sort(itemFolderToReturn.getChildren(), new ItemComparator());
			logger.debug("Returning: "+sf);
			return sf;

		} catch (Exception e) {
			logger.error("Error during folder retrieving", e);
			throw new WorkspaceNavigatorServiceException("Sorry, an error occurred when performing get folder");
		}
	}

	
	@Override
	public int getFolderChildrenCount(ItemDTO item){
		return Whorespace.getItemChildrenCount(getThreadLocalRequest(), item.getId());
	}
	
	
}