source: trunk/EventBenchCore/src/de/ugoe/cs/eventbench/data/Event.java @ 23

package de.ugoe.cs.eventbench.data;

import java.security.InvalidParameterException;



public class Event<T> {
        
        public static final Event<Object> STARTEVENT = new Event<Object>("START");
        public static final Event<Object> ENDEVENT = new Event<Object>("END");
        
        /**
         * <p>
         * Type of the event.
         * </p>
         */
        private String type;
        
        /**
         * </p>
         * Target of the event.
         */
        private String target = null;
        
        /**
         * <p>
         * Short description of the event target.
         * </p>
         */
        private String targetShort = null;


        private String idInfo = "";
        
        public Event(String type) {
                if( type==null ) {
                        throw new InvalidParameterException("Event type must not be null");
                }
                this.type = type;
        }

        @Override
        public boolean equals(Object other) {
                if( this==other ) {
                        return true;
                }
                if (other instanceof Event<?>) {
                        Event<?> otherEvent = (Event<?>) other;
                        if( target!=null ) {
                                return type.equals(otherEvent.type)
                                        && target.equals(otherEvent.target);
                        } else {
                                return type.equals(otherEvent.type)
                                        && otherEvent.target==null;
                        }
                } else {
                        return false;
                }
        }
        
        @Override
        public String toString() {
                return getStandardId();
        }

        public String getIdInfo() {
                return idInfo;
        }

        public String getShortId() {
                String shortId = null;
                if (targetShort!=null) {
                        shortId = targetShort+"."+getType();
                        if ( !"".equals(idInfo)) {
                                shortId += "."+idInfo;
                        }
                } else {
                        shortId = getStandardId();
                }
                return shortId;
        }

        public String getStandardId() {
                String id = "";
                if( target!=null ) {
                        id += target + ".";
                }
                id += getType();
                if ( !"".equals(idInfo) ) {
                        id += "." + idInfo;
                }
                return id;
        }

        public String getTarget() {
                return target;
        }
        
        public String getTargetShort() {
                return targetShort;
        }

        public String getType() {
                return type;
        }

        @Override
        public int hashCode() {
                int multiplier = 17;
                int hash = 42;
                hash = multiplier * hash + type.hashCode();
                if( target!=null ) {
                        hash = multiplier * hash + target.hashCode();
                }

                return hash;
        }

        public void setIdInfo(String info) {
                idInfo = info;
        }
        
        /**
         * <p>
         * Sets the target of the event. Once set, the target cannot be changed.
         * </p> 
         * @param target target of the event
         * @return true, if target was changed, false otherwise
         */
        public boolean setTarget(String target) {
                if( this.target!=null ) {
                        return false;
                }
                this.target = target;
                return true;
        }
        
        /**
         * <p>
         * Sets the short description of the event target. Once set, the target cannot be changed.
         * </p> 
         * @param targetShort short target description
         * @return true, if target was changed, false otherwise
         */
        public boolean setTargetShort(String targetShort) {
                if( this.targetShort!=null ) {
                        return false;
                }
                this.targetShort = targetShort;
                return true;
        }
}