/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.vfs;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.vfs2.FileObject;
  import org.apache.commons.vfs2.FileSystemException;
  import org.apache.commons.vfs2.FileSystemManager;
  import org.apache.commons.vfs2.VFS;
  import org.argeo.slc.SlcException;
  import org.argeo.slc.core.deploy.ResourceSet;
  import org.springframework.core.io.Resource;
  
  public class VfsResourceSet implements ResourceSet {
  	private String base;
  
  	public Map<String, Resource> listResources() {
  		try {
  			FileSystemManager fileSystemManager = VFS.getManager();
  			FileObject fileObject = fileSystemManager.resolveFile(base);
  			Map<String, Resource> map = new HashMap<String, Resource>();
  			addToMap(map, "", fileObject);
  
  			// TODO: add filters
  			return map;
  		} catch (FileSystemException e) {
  			throw new SlcException("Cannot list VFS resources from " + base, e);
  		}
  	}
  
  	/** recursive */
  	protected void addToMap(Map<String, Resource> map, String parentPath,
  			FileObject fileObject) {
  		try {
  			String newParentPath = parentPath
  					+ fileObject.getName().getBaseName() + '/';
  			if (fileObject.getType().hasChildren()) {
  				for (FileObject child : fileObject.getChildren()) {
  					addToMap(map, newParentPath, child);
  				}
  			} else {
  				map.put(parentPath + fileObject.getName().getBaseName(),
  						new VfsResource(fileObject));
  			}
  		} catch (FileSystemException e) {
  			throw new SlcException("Cannot add children from " + parentPath, e);
  		}
  	}
  
  	public void setBase(String base) {
  		this.base = base;
  	}
  
  }