I am unable to retrieve values of selected checkboxes in angularjs

can anybody tell me how should I retrieve values of selected checkboxes in angularjs. I will give you a brief scenario. I have an object called 'user' in which I have a list of permissions as a member of 'user'. Now in jsp I have several check boxes, what I want is when I check checkboxes the values of selected checkboxes should be mapped with permission list whoch is present in the 'user', How can I do that.? I will show my permission checkboxes jsp code which is as follows

<div class="form-group required">
                                                                <label for="Permissions" class="col-sm-3 control-label">Permissions</label>
                                                                <div class="col-sm-6 Nopadding" data-ng-model="ctrl.user.permissionVoList.permissionId">
                                                                    <div class="checkbox"   data-ng-repeat="permissionVo in ctrl.permissionVoList" >
                                                                        <label data-toggle="tooltip" data-placement="right"
                                                                            data-html="true"
                                                                            title="<p align='left'></p>">
                                                                            <input type="checkbox" value= /> 
                                                                        </label>
                                                                    </div>

                                                                </div>
                                                            </div>

and 'user' object in the controller is as follows

 self.user={
                  userId:'1',
                  firstName:'Vishal',
                  middleName:'Vasant',
                  lastName:'Raut',
                  phoneNumber:'9898989898',
                  emailId:'vishal@gmail.com',
                  username:'vishal',
                  password:'111111',
                  notification:'no',
                  costPerHour:'1000',
                  roleVo:{roleId:''},
                  shiftVo:{shiftId:''},
                  permissionVoList:[{permissionId:''}]

            };