/* <copyright> This file contains proprietary software owned by Motorola Mobility, Inc.<br/> No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/> (c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved. </copyright> */ /* generic handle-based object manager */ objectManager = function() { this.guidCounter = 0; this.objects = []; this.numObjects = 0; this.freelist = []; this.reset = function() { this.objects = []; this.freelist = []; this.guidCounter = 0; } // validHandle this.validHandle = function(h) { return this.handleToIndex(h) != -1; } // handleToIndex this.handleToIndex = function(h) { var index = ( h >> 16 ) & 0xFFFF; if( this.objects[index] != null && h == this.objects[index].handle ) { return index; } return -1; } // handleToObject this.handleToObject = function(h) { var index = this.handleToIndex( h ); if( index != -1 ) { return this.objects[index]; } return null; } // add object this.addObject = function(ob) { var index = this.objects.length; if( this.freelist.length > 0 ) { index = this.freelist.pop(); } if( ++this.guidCounter >= 0xFFFF ) { // wrap the counter, zero is reserved for invalid handles. this.guidCounter = 1; } ob.handle = ( index << 16 | ++this.guidCounter ); this.objects[index] = ob; return ob.handle; } // remove object this.removeObject = function(h) { var index = this.handleToIndex( h ); if( index != -1 ) { if( this.objects[index].onremove != undefined ) { this.objects[index].onremove(); } this.objects[index] = null; this.freelist.push(index); } } }