zippathcomparator.java

来自「Ftp服务1.0」· Java 代码 · 共 54 行

package ranab.jar;

import java.util.zip.ZipEntry;


/**
 * Compare two zip entries based on the file name.
 * 
 * @author <a href="mailto:[e-mail]">Rana Bhattacharyya</a>
 */
public
class ZipPathComparator extends ZipComparator  {
    
    public int compare(Object o1, Object o2)  {
        if (!(o1 instanceof java.util.zip.ZipEntry && o1 instanceof java.util.zip.ZipEntry))  {
            throw new IllegalArgumentException("Not a ZipEntry object."); 
        }
        
        ZipEntry z1 = (ZipEntry)o1;
        ZipEntry z2 = (ZipEntry)o2;
        return getPath(z1).compareTo(getPath(z2));
    }
    
    public boolean equals(Object o1, Object o2)  {
        if (!(o1 instanceof java.util.zip.ZipEntry && o1 instanceof java.util.zip.ZipEntry))  {
            throw new IllegalArgumentException("Not a ZipEntry object."); 
        }
        
        ZipEntry z1 = (ZipEntry)o1;
        ZipEntry z2 = (ZipEntry)o2;
        return getPath(z1).equals(getPath(z2));
    }
    
  
    /**
     * get zip entry path
     */
    public static String getPath(ZipEntry ze) {
        String fullName = ze.getName();
        int index = fullName.lastIndexOf('/');
        if (index == -1)      {
            return "";
        }
        return fullName.substring(0, index + 1);
    }
    
    /**
     * get header name
     */
     public String getHeaderName()  {
         return "Path";
     }
}