package org.kuali.rice.krms.api;

 /**

  * identifies a (hopefully) resolvable asset

  * @author gilesp

  *

  */

 public final class Asset implements Comparable<Asset> {

         private final String name;

         private final String type;

         private final String comparatorHelper;

         public Asset(String name, String type) {

                 if (name == null) throw new IllegalArgumentException("name is required");

                 if (name.contains("!")) throw new IllegalArgumentException("name contains illegal character '!'");

                 if (type == null) throw new IllegalArgumentException("type is required");

                 if (type.contains("!")) throw new IllegalArgumentException("type contains illegal character '!'");

                 this.name = name;

                 this.type = type;

                 // for lexicographic total ordering

                 this.comparatorHelper = name + "!" + type;

         }

         public String getName() { return name; }

         public String getType() { return type; }

         /* (non-Javadoc)

          * @see java.lang.Object#hashCode()

          */

         @Override

         public int hashCode() {

                 final int prime = 31;

                 int result = 1;

                 result = prime * result + ((name == null) ? 0 : name.hashCode());

                 result = prime * result + ((type == null) ? 0 : type.hashCode());

                 return result;

         }

         /* (non-Javadoc)

          * @see java.lang.Object#equals(java.lang.Object)

          */

         @Override

         public boolean equals(Object obj) {

                 if (this == obj)

                         return true;

                 if (obj == null)

                         return false;

                 if (getClass() != obj.getClass())

                         return false;

                 Asset other = (Asset) obj;

                 return this.compareTo(other) == 0;

         }

         @Override

         public int compareTo(Asset o) {

                 if (o == null) return 1;

                 if (this == o) return 0;

                 return (comparatorHelper.compareTo(o.comparatorHelper));

         }

         public String getComparatorHelper() {

                 return comparatorHelper;

         }

         @Override

         public String toString() {

                 // TODO make this pretty

                 return getClass().getSimpleName()+"("+getComparatorHelper()+")";

         }

 }