source: fedd/abac-src/rtml/src/edu/stanford/rt/credential/DelegationRole.java @ db6b092

package edu.stanford.rt.credential;

/**
 * @author Ninghui Li, Sandra Qiu<br>
 *
 * Implementation of <code>SimpleDelegation</code> element.
 * A <code>DelegationRole</code> has a required part <code>delegateTo</code>
 * and an optional part <code>control</code>.
 */
public class DelegationRole implements PrincipalExpression
{
        /**
         *  to whom to delegate the authority.
         */
        private PrincipalExpression delegateTo; // required element.

        /**
         * depth of the allowed further delegation.
         */
        private Role control;

        /**
         * Constructor for DelegationRole.
         */
        public DelegationRole(
                PrincipalExpression delegateTo,
                Role control)
        {
                this.delegateTo = delegateTo;
                this.control = control;
        }

        /* (non-Javadoc)
         * @see edu.stanford.rt.credential.PrincipalExpression#toString(String)
         */
        public String toString(String indent)
        {
                String thisIndent = indent + "  ";
                StringBuffer sb = new StringBuffer();
                sb.append(thisIndent).append("Delegation Role: \n");
                sb.append(thisIndent + "  ").append(
                        delegateTo.toString()).append(
                        "\n");
                sb
                        .append(thisIndent + "  ")
                        .append(
                                (control == null)
                                        ? ""
                                        : control.toString(thisIndent + "  "))
                        .append("\n");
                return sb.toString();
        }

}