runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/test/TestDataUtils.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.core.test;
  18
  19 import org.argeo.slc.UnsupportedException;
  20 import org.argeo.slc.test.TestData;
  21 import org.argeo.slc.test.TestDataProvider;
  22
  23 /** Utilities for dealing with test datas. */
  24 public class TestDataUtils {
  25         /** Extracts the test data from the given provider. */
  26         public static <T extends TestData> T getFromProvider(Object obj,
  27                         Class<T> clss, String key) {
  28                 if (obj instanceof TestDataProvider) {
  29                         TestDataProvider testDataProvider = (TestDataProvider) obj;
  30                         return testDataProvider.getTestData(clss, key);
  31                 } else {
  32                         throw new UnsupportedException("test data provider", obj);
  33                 }
  34         }
  35
  36         /**
  37          * Extracts the test data from the given provider using <code>null</code>
  38          * as key.
  39          */
  40         public static <T extends TestData> T getFromProvider(Object obj,
  41                         Class<T> clss) {
  42                 return getFromProvider(obj, clss, null);
  43         }
  44
  45         /**
  46          * Returns it self after making the proper checks. Used for test data being
  47          * their own data providers.
  48          */
  49         @SuppressWarnings("unchecked")
  50         public static <T extends TestData> T getItSelf(Class<T> clss,
  51                         TestData testDataObject) {
  52                 if (clss.isAssignableFrom(testDataObject.getClass())) {
  53                         return (T) testDataObject;
  54                 } else {
  55                         throw new UnsupportedException("test data", testDataObject);
  56                 }
  57
  58         }
  59
  60         /** Makes sure this is an utility class. */
  61         private TestDataUtils() {
  62
  63         }
  64 }