Custom Object info using Tooling API

gistfile1.txt

Apex Code:

HttpRequest req = new HttpRequest();
req.setHeader('Authorization', 'Bearer ' + UserInfo.getSessionID());
req.setHeader('Content-Type', 'application/json');
String domainUrl=URL.getSalesforceBaseUrl().toExternalForm();
system.debug('********domainUrl:'+domainUrl);
req.setEndpoint(domainUrl+'/services/data/v28.0/tooling/query/?q=Select+id,DeveloperName,Sharingmodel,NamespacePrefix+from+CustomObject');
req.setMethod('GET');

Http h = new Http();
HttpResponse res = h.send(req);
system.debug(res.getBody()); 

Response will be in JSON and it will be in below format:

{
    "size": "123",
    "totalSize": "123",
    "done": "true",
    "entityTypeName": "CustomEntityDefinition",
    "records": [
      {
        "attributes": {
          "type": "CustomObject",
          "url": "/services/data/v28.0/tooling/sobjects/CustomObject/01I90000000oCnsEAE"
        },
        "Id": "01I90000000oCnsEAE",
        "DeveloperName": "Items",
        "SharingModel": "Edit"
      },
      {
        "attributes": {
          "type": "CustomObject",
          "url": "/services/data/v28.0/tooling/sobjects/CustomObject/01I90000001IxALEA0"
        },
        "Id": "01I90000001IxALEA0",
        "DeveloperName": "Mobile_App_Object_Fields",
        "SharingModel": "ControlledByParent"
      },
      {
        "attributes": {
          "type": "CustomObject",
          "url": "/services/data/v28.0/tooling/sobjects/CustomObject/01I90000000nzuGEAQ"
        },
        "Id": "01I90000000nzuGEAQ",
        "DeveloperName": "Salesforce_Access_Key",
        "SharingModel": "Edit"
      }
    ]
  }