/*******************************************************************************
* Copyright (c) 2000, 2015, 2016 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Red Hat Inc. - modified for use with Docker Tooling
*******************************************************************************/
package org.eclipse.linuxtools.internal.docker.ui;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.linuxtools.docker.ui.Activator;
import org.eclipse.ui.wizards.datatransfer.IImportStructureProvider;
/**
* This class provides information regarding the structure and content of
* specified file system File objects.
*
* class copied from
* org.eclipse.ui.wizards.datatransfer.FileSystemStructureProvider as its
* singleton
*/
public class IDEFileSystemStructureProvider
implements IImportStructureProvider {
private Set<String> visitedDirs;
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
public List getChildren(Object element) {
File folder = (File) element;
String[] children = folder.list();
int childrenLength = children == null ? 0 : children.length;
List result = new ArrayList(childrenLength);
for (int i = 0; i < childrenLength; i++) {
File file = new File(folder, children[i]);
if (isRecursiveLink(file))
continue;
result.add(file);
}
return result;
}
private void initVisitedDirs() {
if (visitedDirs == null) {
visitedDirs = new HashSet<>();
}
}
private boolean isRecursiveLink(File childFile) {
if (childFile.isDirectory()) {
try {
String canonicalPath = childFile.getCanonicalPath();
initVisitedDirs();
return !visitedDirs.add(canonicalPath);
} catch (IOException e) {
Activator.log(e);
}
}
return false;
}
@Override
public InputStream getContents(Object element) {
try {
return new FileInputStream((File) element);
} catch (FileNotFoundException e) {
Activator.log(e);
return null;
}
}
@Override
public String getFullPath(Object element) {
return ((File) element).getPath();
}
@Override
public String getLabel(Object element) {
// Get the name - if it is empty then return the path as it is a file
// root
File file = (File) element;
String name = file.getName();
if (name.length() == 0) {
return file.getPath();
}
return name;
}
@Override
public boolean isFolder(Object element) {
return ((File) element).isDirectory();
}
/**
* Clears the visited dir information
*/
public void clearVisitedDirs() {
if (visitedDirs != null)
visitedDirs.clear();
}
}