package com.opensymphony.xwork2.util.fs;
import java.io.File;
import java.net.URISyntaxException;
import java.net.URL;
/**
* Represents file resource revision, used for file://* resources
*/
public class FileRevision extends Revision {
private File file;
private long lastModified;
public static Revision build(URL fileUrl) {
File file;
try {
if (fileUrl != null) {
file = new File(fileUrl.toURI());
} else {
return null;
}
} catch (URISyntaxException e) {
file = new File(fileUrl.getPath());
} catch (Throwable t) {
return null;
}
if (file.exists() && file.canRead()) {
long lastModified = file.lastModified();
return new FileRevision(file, lastModified);
}
return null;
}
private FileRevision(File file, long lastUpdated) {
if (file == null) {
throw new IllegalArgumentException("File cannot be null");
}
this.file = file;
this.lastModified = lastUpdated;
}
public File getFile() {
return file;
}
public boolean needsReloading() {
return this.lastModified < this.file.lastModified();
}
}