package org.webslinger.commons.vfs.util;

 import java.util.Map;

 import org.apache.commons.vfs.FileObject;

 public final class FileAttributeEntry<F extends FileObject> extends FileAttributeBaseWrapper<F> implements Map.Entry<String, Object> {

     private String name;

     private boolean removed;

     public FileAttributeEntry(FileAttributeBaseWrapper<F> wrapper, String name) {

         super(wrapper);

         this.name = name;

     }

     public void removedFromIterator() {

         removed = true;

     }

     protected void checkRemoved() {

         if (removed) throw new IllegalStateException("removed");

     }

     public Object setValue(Object value) {

         checkRemoved();

         try {

             F file = getFile();

             Object oldValue = resolver.getAttribute(file, name);

             resolver.setAttribute(file, name, value);

             return oldValue;

         } catch (Exception e) {

             throw (IllegalArgumentException) new IllegalArgumentException().initCause(e);

         }

     }

     public String getKey() {

         checkRemoved();

         return name;

     }

     public Object getValue() {

         checkRemoved();

         try {

             return resolver.getAttribute(getFile(), name);

         } catch (Exception e) {

             throw (IllegalArgumentException) new IllegalArgumentException().initCause(e);

         }

     }

     public boolean equals(Object o) {

         checkRemoved();

         if (!(o instanceof FileAttributeEntry)) return false;

         FileAttributeEntry fae = (FileAttributeEntry) o;

         if (name.equals(fae.name)) return true;

         Object value = getValue();

         Object otherValue = fae.getValue();

         if (value == null) {

             if (otherValue == null) return true;

             return false;

         } else {

             return value.equals(otherValue);

         }

     }

     public int hashCode() {

         int hashCode = name.hashCode();

         Object value = getValue();

         if (value != null) hashCode ^= value.hashCode();

         return hashCode;

     }

 }