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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.slc.core.test;
  17
  18 import org.argeo.slc.UnsupportedException;
  19 import org.argeo.slc.test.TestData;
  20 import org.argeo.slc.test.TestDataProvider;
  21
  22 /** Utilities for dealing with test datas. */
  23 public class TestDataUtils {
  24         /** Extracts the test data from the given provider. */
  25         public static <T extends TestData> T getFromProvider(Object obj,
  26                         Class<T> clss, String key) {
  27                 if (obj instanceof TestDataProvider) {
  28                         TestDataProvider testDataProvider = (TestDataProvider) obj;
  29                         return testDataProvider.getTestData(clss, key);
  30                 } else {
  31                         throw new UnsupportedException("test data provider", obj);
  32                 }
  33         }
  34
  35         /**
  36          * Extracts the test data from the given provider using <code>null</code>
  37          * as key.
  38          */
  39         public static <T extends TestData> T getFromProvider(Object obj,
  40                         Class<T> clss) {
  41                 return getFromProvider(obj, clss, null);
  42         }
  43
  44         /**
  45          * Returns it self after making the proper checks. Used for test data being
  46          * their own data providers.
  47          */
  48         @SuppressWarnings("unchecked")
  49         public static <T extends TestData> T getItSelf(Class<T> clss,
  50                         TestData testDataObject) {
  51                 if (clss.isAssignableFrom(testDataObject.getClass())) {
  52                         return (T) testDataObject;
  53                 } else {
  54                         throw new UnsupportedException("test data", testDataObject);
  55                 }
  56
  57         }
  58
  59         /** Makes sure this is an utility class. */
  60         private TestDataUtils() {
  61
  62         }
  63 }