package org.kuali.common.devops.jenkins.archive;
   
   import static org.kuali.common.util.base.Precondition.checkNotNull;
   import static org.kuali.common.util.file.Files.getCanonicalFile;
   
   import java.io.File;
   
   import com.google.common.base.Predicate;
   
  public enum JenkinsBuildPredicate implements Predicate<File> {
  	INSTANCE;
  
  	@Override
  	public boolean apply(File dir) {
  		boolean directory = checkNotNull(dir, "dir").isDirectory();
  		boolean hasPrefix = dir.getName().startsWith("20"); // This will only work until the end of 2099
  		boolean symlink = isSymLink(dir);
  		return directory && hasPrefix && !symlink;
  	}
  
  	private boolean isSymLink(File dir) {
  		String absolute = dir.getAbsolutePath();
  		String canonical = getCanonicalFile(dir).getPath();
  		return !canonical.equals(absolute);
  	}
  
  }