package org.richfaces.demo.tree.adaptors;
import static com.google.common.base.Predicates.containsPattern;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Iterables.filter;
import static com.google.common.collect.Iterables.transform;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
public class FileSystemNode {
private static final Function<String, FileSystemNode> FACTORY = new Function<String, FileSystemNode>() {
public FileSystemNode apply(String from) {
return new FileSystemNode(from.substring(0, from.length() - 1));
}
;
};
private static final Function<String, String> TO_SHORT_PATH = new Function<String, String>() {
public String apply(String from) {
int idx = from.lastIndexOf('/');
if (idx < 0) {
return from;
}
return from.substring(idx + 1);
}
;
};
private String path;
private List<FileSystemNode> directories;
private List<String> files;
private String shortPath;
public FileSystemNode(String path) {
this.path = path;
int idx = path.lastIndexOf('/');
if (idx != -1) {
shortPath = path.substring(idx + 1);
} else {
shortPath = path;
}
}
public synchronized List<FileSystemNode> getDirectories() {
if (directories == null) {
directories = Lists.newArrayList();
Iterables.addAll(directories, transform(filter(getResourcePaths(), containsPattern("/$")), FACTORY));
}
return directories;
}
public synchronized List<String> getFiles() {
if (files == null) {
files = new ArrayList<String>();
Iterables.addAll(files, transform(filter(getResourcePaths(), not(containsPattern("/$"))), TO_SHORT_PATH));
}
return files;
}
private Iterable<String> getResourcePaths() {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
Set<String> resourcePaths = externalContext.getResourcePaths(this.path);
if (resourcePaths == null) {
resourcePaths = Collections.emptySet();
}
return resourcePaths;
}
public String getShortPath() {
return shortPath;
}
}