Identitypublic class Identity extends Object implements Serializable| A representation of an agent identity, for general use in distributed
computing contexts. This base class is a simple wrapper around a property
list, with an equality method implemented to compare the name and id of two
Identities, for purposes of correlating messages from the same agent.
Subclasses can extend the interface to provide additional properties or
certification tokens.
Source code from "Java Distributed Computing", 2nd ed., Jim Farley.
Class: Identity
Example: ??
Description: Representation of an agent identity. |
| Fields Summary |
|---|
| protected Hashtable | props |
| Constructors Summary |
|---|
public Identity()
| public Identity(int id) props.put("idnum", new Integer(id));
|
| Methods Summary |
|---|
| public boolean | equals(java.lang.Object o)Check the equality of two identities. In the default case, equality is
based on a comparison of the name and id of the two Identities.
boolean same = true;
if (o != null && o.getClass() == this.getClass()) {
Identity oi = (Identity)o;
Hashtable oProps = oi.props;
Enumeration keys = this.props.keys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
Object prop = this.props.get(key);
Object oProp = oProps.get(key);
if ((prop == null && oProp == null) ||
(prop != null && oProp != null &&
prop.equals(oProp))) {
// Do nothing, still equal as far as we know
}
else {
// Found a non-equal property pair. Quit here.
same = false;
break;
}
}
}
return same;
| | public int | getId()
Integer idNum = (Integer)props.get("idnum");
if (idNum != null) {
return idNum.intValue();
}
else {
return -1;
}
| | public java.lang.String | getName() return (String)props.get("name");
| | public java.lang.Object | getProperty(java.lang.Object key)
return props.get(key);
| | public void | setName(java.lang.String n) props.put("name", n);
| | public void | setProperty(java.lang.Object key, java.lang.Object val)
props.put(key, val);
|
|
