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1   /*
2    * Copyright 2001-2008 The Apache Software Foundation.
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  
18  package org.apache.juddi.query;
19  
20  import java.util.List;
21  
22  import javax.persistence.EntityManager;
23  
24  import org.apache.juddi.query.util.DynamicQuery;
25  import org.apache.juddi.query.util.FindQualifiers;
26  import org.uddi.api_v3.CategoryBag;
27  
28  /**
29   * Returns the list of service keys possessing the keyedReferences in the passed category bag.
30   * Output is restricted by list of service keys passed in.  If null, all business services are searched.
31   * Output is produced by building the appropriate JPA query based on input and find qualifiers.
32   * 
33   * From specification:
34   * From specification:
35   * "combineCategoryBags:  this may only be used in the find_business and find_service calls.  In the case of 
36   * find_business, this qualifier makes the categoryBag entries for the full businessEntity element behave as though all 
37   * categoryBag elements found at the businessEntity level and in all contained or referenced businessService elements 
38   * and bindingTemplate elements were combined.  Searching for a category will yield a positive match on a registered 
39   * business if any of the categoryBag elements contained within the full businessEntity element (including the 
40   * categoryBag elements within contained or referenced businessService elements or bindingTemplate elements) 
41   * contains the filter criteria. 
42   * 
43   * In the case of find_service, this qualifier makes the categoryBag entries 
44   * for the full businessService element behave as though all categoryBag elements found at the businessService level 
45   * and in all contained or referenced elements in the bindingTemplate elements were combined.  Searching for a category 
46   * will yield a positive match on a registered service if any of the categoryBag elements contained within the 
47   * full businessService element (including the categoryBag elements within contained or referenced bindingTemplate 
48   * elements) contains the filter criteria. 
49   * 
50   * This find qualifier does not cause the keyedReferences in categoryBags 
51   * to be combined with the keyedReferences in keyedReferenceGroups in categoryBags when performing the comparison.  
52   * The keyedReferences are combined with each other, and the keyedReferenceGroups are combined with each other."
53   * 
54   * @author <a href="mailto:jfaath@apache.org">Jeff Faath</a>
55   * @author <a href="mailto:tcunning@apache.org">Tom Cunningham</a>
56   * @author <a href="mailto:kstam@apache.org">Kurt Stam</a>
57   */
58  public class FindServiceByCombinedCategoryQuery {
59  	
60  	private static final String ENTITY_NAME_CHILD  = "ServiceCategoryBag";
61  	private static final String ENTITY_FIELD2      = "bindingTemplate." + BusinessServiceQuery.ENTITY_FIELD;
62  	private static final String ENTITY_NAME_CHILD2 = "BindingCategoryBag";
63  	
64  	private static final FindEntityByCombinedCategoryQuery findQuery;
65  	
66  	static {
67  		findQuery = new FindEntityByCombinedCategoryQuery(BusinessServiceQuery.ENTITY_NAME, 
68  														  BusinessServiceQuery.ENTITY_ALIAS, 
69  														  BusinessServiceQuery.KEY_NAME, 
70  														  BusinessServiceQuery.ENTITY_FIELD, 
71  														  ENTITY_NAME_CHILD,
72  														  ENTITY_FIELD2,
73  														  ENTITY_NAME_CHILD2,
74  														  null,
75  														  null,
76  														  BusinessServiceQuery.SIGNATURE_PRESENT);
77  	}
78  	
79  	public static List<Object> select(EntityManager em, FindQualifiers fq, CategoryBag categoryBag, String parentKey, List<Object> keysIn) {
80  		if (parentKey != null && parentKey.length() > 0) {
81  			DynamicQuery.Parameter param = new DynamicQuery.Parameter(BusinessServiceQuery.ENTITY_ALIAS + "." + BusinessServiceQuery.KEY_NAME_PARENT, parentKey, DynamicQuery.PREDICATE_EQUALS); 
82  			return findQuery.select(em, fq, categoryBag, keysIn, param);
83  		}
84  		else
85  			return findQuery.select(em, fq, categoryBag, keysIn);
86  	}
87  }