/**
    * Copyright 2005-2015 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.kns.web.struts.form.pojo;
  
  import org.apache.commons.beanutils.NestedNullException;
  import org.apache.commons.beanutils.PropertyUtils;
  import org.apache.struts.config.impl.ModuleConfigImpl;
  import org.junit.Assert;
  import org.junit.Test;
  import org.kuali.rice.krad.bo.DocumentAttachment;
  import org.kuali.rice.krad.bo.PersistableBusinessObjectBase;
  import org.kuali.rice.krad.service.PersistenceStructureService;
  import org.kuali.rice.krad.util.ObjectUtils;
  
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.lang.reflect.Proxy;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  
  import static org.junit.Assert.*;
  
  public class PojoPluginTest {
  
      /**
       * <p>Testing scenario that was not working in the linked issue off of
       * KULRICE-6877: KualiMaintainbleImpl#performCollectionForceUpperCase blowing up</p>
       * 
       * @throws Exception
       */
      @Test
      public void testGetChildCollectionThrowsNestedNullException() throws Exception {
  
          // We need to initialize PropertyUtils to use our plugins
          new PojoPlugin().init(null, new ModuleConfigImpl());
  
          TestCollectionHolderHolder tchh = new TestCollectionHolderHolder();
          tchh.setTch(new TestCollectionHolder());
          
          // this simulates a situation in which the property (tch) is a proxied object 
          // that can't be fetched, so getting it works (returns the proxy) but trying 
          // to access the collection underneath it throws a NestedNullException
          Object result = ObjectUtils.getPropertyValue(tchh, "tch.collection");
  
          // before, the empty string was being returned, which doesn't make sense for a collection
          assertFalse("".equals(result));
  
          // now we return null
          assertTrue(null == result);
      }
  
      /**
       * <p>Testing scenario that isWriteable blows up with NestedNullException when property value is null
       * KULRICE-6877: KualiMaintainbleImpl#performCollectionForceUpperCase blowing up</p>
       *
       * @throws Exception
       */
      @Test
      public void testNestedNullIsWriteable() throws Exception {
  
          // We need to initialize PropertyUtils to use our plugins
          new PojoPlugin().init(null, new ModuleConfigImpl());
  
          TestCollectionHolderHolder tchh = new TestCollectionHolderHolder();
          assertTrue(PropertyUtils.isWriteable(tchh, "tch2.collection"));
  
  
      }
  
      /**
       * Tests that original IndexOutOfBoundsException is thrown when the bean is not a PersistableBusinessObject
       */
      @Test
      public void testGenerateIndexedPropertyNonPBO() throws IllegalAccessException, InvocationTargetException, NoSuchMethodException  {
          IndexOutOfBoundsException ioobe = new IndexOutOfBoundsException("test exception");
          try {
              new PojoPropertyUtilsBean().generateIndexedProperty(new TestCollectionHolder(), "collection", 0, ioobe);
              Assert.fail("Expected to throw IndexOutOfBoundsException");
          } catch (IndexOutOfBoundsException e) {
              assertEquals(ioobe, e);
          }
      }
  
      /**
      * Tests that original IndexOutOfBoundsException is thrown when the property is not a List
      */
     @Test
     public void testGenerateIndexedPropertyNonList() throws IllegalAccessException, InvocationTargetException, NoSuchMethodException  {
         IndexOutOfBoundsException ioobe = new IndexOutOfBoundsException("test exception");
         try {
             new PojoPropertyUtilsBean().generateIndexedProperty(new DocumentAttachment(), "attachmentContent", 0, ioobe);
             Assert.fail("Expected to throw IndexOutOfBoundsException");
         } catch (IndexOutOfBoundsException e) {
             assertEquals(ioobe, e);
         }
     }
 
     @Test
     public void testUndefinedOJBClass() {
         final Object notAnOjbObject = new HashMap();
         // stub out the persistence service
         PojoPropertyUtilsBean.PersistenceStructureServiceProvider.persistenceStructureService =
                 (PersistenceStructureService) Proxy.newProxyInstance(this.getClass().getClassLoader(),
                         new Class[] { PersistenceStructureService.class },
                         new InvocationHandler() {
                             public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                                 if ("listCollectionObjectTypes".equals(method.getName())) {
                                     return new HashMap();
                                 }
                                 return null;
                             }
                         });
         assertNull(new PojoPropertyUtilsBean.PersistenceStructureServiceProvider().getCollectionItemClass(notAnOjbObject, "abcd"));
     }
 
     /**
      * Ugly name, but it holds a TestCollectionHolder
      */
     public static class TestCollectionHolderHolder extends PersistableBusinessObjectBase {
         private TestCollectionHolder tch = null;
         private TestCollectionHolder2 tch2;
 
         public TestCollectionHolder getTch() {
             return tch;
         }
 
         public void setTch(TestCollectionHolder tch) {
             this.tch = tch;
         }
 
         public TestCollectionHolder2 getTch2() {
             return tch2;
         }
 
         public void setTch2(TestCollectionHolder2 tch2) {
             this.tch2 = tch2;
         }
     }
 
     /**
      * Test class that holds a collection, but trying to get it results in a
      * NestedNullException.
      * @throws NestedNullException
      */
     public static class TestCollectionHolder extends PersistableBusinessObjectBase {
         private Collection collection = Collections.emptyList();
 
         public Collection getCollection() {
             throw new NestedNullException();
         }
 
         public void setCollection(Collection collection) {
             this.collection = collection;
         }
     }
 
     /**
      * Test class that holds a collection, but trying to get it results in a
      * NestedNullException.
      * @throws NestedNullException
      */
     public static class TestCollectionHolder2 extends PersistableBusinessObjectBase {
         private Collection collection = Collections.emptyList();
 
         public Collection getCollection() {
             return collection;
         }
 
         public void setCollection(Collection collection) {
             this.collection = collection;
         }
     }
 
 
 }