ModifyNode


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the "License").  You may not use this file except 
5    * in compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * glassfish/bootstrap/legal/CDDLv1.0.txt or 
9    * https://glassfish.dev.java.net/public/CDDLv1.0.html. 
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * HEADER in each file and include the License file at 
15   * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
16   * add the following below this CDDL HEADER, with the 
17   * fields enclosed by brackets "[]" replaced with your 
18   * own identifying information: Portions Copyright [yyyy] 
19   * [name of copyright owner]
20   */
21  // Copyright (c) 1998, 2006, Oracle. All rights reserved.  
22  package oracle.toplink.essentials.internal.parsing;
23  
24  import oracle.toplink.essentials.queryframework.*;
25  import oracle.toplink.essentials.exceptions.*;
26  import oracle.toplink.essentials.expressions.*;
27  import oracle.toplink.essentials.descriptors.ClassDescriptor;
28  
29  /**
30   * INTERNAL:
31   * ModifyNode is the superclass for UpdateNode and DeleteNode
32   */
33  public abstract class ModifyNode extends QueryNode {
34  
35      private String   abstractSchemaIdentifier;
36      private String   abstractSchemaName;
37  
38      /**
39       * INTERNAL
40       * Apply this node to the passed query.  This node does not change the query.
41       */
42      public void applyToQuery(DatabaseQuery theQuery, GenerationContext context) {
43      }
44  
45      /**
46       * INTERNAL
47       */
48      public Expression generateExpression(GenerationContext context) {
49          return null;
50      }
51  
52      /**
53       * INTERNAL
54       */
55      public String   getAbstractSchemaName() {
56          return abstractSchemaName;
57      }
58  
59      /**
60       * INTERNAL
61       */
62      public void setAbstractSchemaName(String   abstractSchemaName) {
63          this.abstractSchemaName = abstractSchemaName;
64      }
65  
66      /**
67       * INTERNAL
68       */
69      public String   getAbstractSchemaIdentifier() {
70          return abstractSchemaIdentifier;
71      }
72  
73      /**
74       * INTERNAL
75       */
76      public void setAbstractSchemaIdentifier(String   identifierName) {
77          abstractSchemaIdentifier = identifierName;
78      }
79  
80      /**
81       * resolveClass: Answer the class which corresponds to my variableName. This is the class for
82       * an alias, where the variableName is registered to an alias.
83       */
84      public Class   resolveClass(GenerationContext context) {
85          String   alias = abstractSchemaName;
86          ClassDescriptor descriptor = context.getSession().getDescriptorForAlias(alias);
87          if (descriptor == null) {
88              throw EJBQLException.missingDescriptorException(alias);
89          }
90          Class   theClass = descriptor.getJavaClass();
91          if (theClass == null) {
92              throw EJBQLException.resolutionClassNotFoundException(alias);
93          }
94          return theClass;
95      }
96  }
97
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