net/systemeD/halcyon/connection/Relation.as

   1 package net.systemeD.halcyon.connection {
   2
   3     public class Relation extends Entity {
   4         private var members:Array;
   5                 public static var entity_type:String = 'relation';
   6
   7         public function Relation(id:Number, version:uint, tags:Object, loaded:Boolean, members:Array) {
   8             super(id, version, tags, loaded);
   9             this.members = members;
  10                         for each (var member:RelationMember in members)
  11                             member.entity.addParent(this);
  12         }
  13
  14         public function update(version:uint, tags:Object, loaded:Boolean, members:Array):void {
  15                         var member:RelationMember;
  16                         for each (member in this.members)
  17                             member.entity.removeParent(this);
  18
  19                         updateEntityProperties(version,tags,loaded);
  20                         this.members=members;
  21                         for each (member in members)
  22                             member.entity.addParent(this);
  23                 }
  24
  25         public function get length():uint {
  26             return members.length;
  27         }
  28
  29         public function findEntityMemberIndex(entity:Entity):int {
  30             for (var index:uint = 0; index < members.length; index++) {
  31                 var member:RelationMember = members[index];
  32                 if ( member.entity == entity )
  33                     return index;
  34             }
  35             return -1;
  36         }
  37
  38         public function findEntityMemberIndexes(entity:Entity):Array {
  39             var indexes:Array = [];
  40             for (var index:uint = 0; index < members.length; index++) {
  41                 var member:RelationMember = members[index];
  42                 if ( member.entity == entity )
  43                     indexes.push(index);
  44             }
  45             return indexes;
  46         }
  47
  48         public function getMember(index:uint):RelationMember {
  49             return members[index];
  50         }
  51
  52         public function setMember(index:uint, member:RelationMember):void {
  53             var oldMember:RelationMember = getMember(index);
  54
  55                         members.splice(index, 1, member);
  56             oldMember.entity.removeParent(this);
  57                         member.entity.addParent(this);
  58                         markDirty();
  59         }
  60
  61         public function insertMember(index:uint, member:RelationMember):void {
  62             members.splice(index, 0, member);
  63                         member.entity.addParent(this);
  64                         markDirty();
  65
  66                         dispatchEvent(new RelationMemberEvent(Connection.RELATION_MEMBER_ADDED, member.entity, this, index));
  67         }
  68
  69         public function appendMember(member:RelationMember):uint {
  70             members.push(member);
  71                         member.entity.addParent(this);
  72                         markDirty();
  73
  74                         dispatchEvent(new RelationMemberEvent(Connection.RELATION_MEMBER_ADDED, member.entity, this, members.length-1));
  75             return members.length;
  76         }
  77
  78                 public function removeMember(entity:Entity):void {
  79                         var i:int;
  80                         var lastRemoved:int = -1;
  81                         while ((i=findEntityMemberIndex(entity))>-1) {
  82                                 members.splice(i, 1);
  83                                 lastRemoved = i;
  84                         }
  85                         entity.removeParent(this);
  86                         markDirty();
  87
  88                         if ( lastRemoved >= 0 )
  89                             dispatchEvent(new RelationMemberEvent(Connection.RELATION_MEMBER_REMOVED, entity, this, lastRemoved));
  90                 }
  91
  92         public function removeMemberByIndex(index:uint):void {
  93             var removed:Array=members.splice(index, 1);
  94                         var entity:Entity=removed[0].entity;
  95
  96                         // only remove as parent if this was only reference
  97                         if (findEntityMemberIndex(entity)==-1)
  98                             entity.removeParent(this);
  99
 100                         markDirty();
 101             dispatchEvent(new RelationMemberEvent(Connection.RELATION_MEMBER_REMOVED, entity, this, index));
 102         }
 103
 104                 public override function remove():void {
 105                         removeFromParents();
 106                         for each (var member:RelationMember in members) { member.entity.removeParent(this); }
 107                         members=[];
 108                         deleted=true;
 109             dispatchEvent(new EntityEvent(Connection.RELATION_DELETED, this));
 110                 }
 111
 112                 internal override function isEmpty():Boolean {
 113                         return (deleted || (members.length==0));
 114                 }
 115
 116         public function getDescription():String {
 117             var desc:String = "";
 118             var relTags:Object = getTagsHash();
 119             if ( relTags["type"] ) {
 120                 desc = relTags["type"];
 121                 if ( relTags[desc] )
 122                     desc += " " + relTags[desc];
 123             }
 124             if ( relTags["ref"] )
 125                 desc += " " + relTags["ref"];
 126             if ( relTags["name"] )
 127                 desc += " " + relTags["name"];
 128             return desc;
 129         }
 130
 131                 public override function getType():String {
 132                         return 'relation';
 133                 }
 134
 135                 public override function toString():String {
 136             return "Relation("+id+"@"+version+"): "+members.length+" members "+getTagList();
 137         }
 138
 139     }
 140
 141 }