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Java > Open Source Codes > org > jboss > ejb > plugins > cmp > ejbql > IdentifierManager


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ejb.plugins.cmp.ejbql;
23
24 import java.util.HashMap JavaDoc;
25 import java.util.List JavaDoc;
26 import java.util.Map JavaDoc;
27
28 import org.jboss.ejb.plugins.cmp.bridge.EntityBridge;
29 import org.jboss.ejb.plugins.cmp.bridge.CMRFieldBridge;
30
31 /**
32  * This class manages a symbol table for the EJB-QL parser.
33  *
34  * @author <a HREF="mailto:dain@daingroup.com">Dain Sundstrom</a>
35  * @version $Revision: 37459 $
36  */
37 public final class IdentifierManager {
38    private final Catalog catalog;
39    private final Map JavaDoc pathLists = new HashMap JavaDoc();
40    private final Map JavaDoc fieldLists = new HashMap JavaDoc();
41    private final Map JavaDoc identifiers = new HashMap JavaDoc();
42
43    public IdentifierManager(Catalog catalog) {
44       this.catalog = catalog;
45    }
46
47    public void declareRangeVariable(
48          String JavaDoc identifier,
49          String JavaDoc abstractSchemaName) {
50
51       identifiers.put(
52             identifier,
53             catalog.getEntityByAbstractSchemaName(abstractSchemaName));
54    }
55      
56    public void declareCollectionMember(
57          String JavaDoc identifier,
58          String JavaDoc path) {
59
60       List JavaDoc fieldList = (List JavaDoc)fieldLists.get(path);
61       Object JavaDoc field = fieldList.get(fieldList.size()-1);
62       if(!(field instanceof CMRFieldBridge)) {
63          throw new IllegalArgumentException JavaDoc("Path is collection valued: "+path);
64       }
65       CMRFieldBridge cmrField = (CMRFieldBridge)field;
66       if(cmrField.isSingleValued()) {
67          throw new IllegalArgumentException JavaDoc("Path is collection valued: "+path);
68       }
69       identifiers.put(identifier, cmrField.getRelatedEntity());
70    }
71
72    public EntityBridge getEntity(String JavaDoc identificationVariable) {
73       return (EntityBridge)identifiers.get(identificationVariable);
74    }
75    
76    public void registerPath(
77          String JavaDoc path,
78          List JavaDoc pathList,
79          List JavaDoc fieldList) {
80
81       if(pathList.size() != fieldList.size()) {
82          throw new IllegalArgumentException JavaDoc("Path list and field list must " +
83                "have the same size: pathList.size=" + pathList.size() +
84                " fieldList.size=" + fieldList.size());
85       }
86       pathLists.put(path, pathList);
87       fieldLists.put(path, fieldList);
88    }
89
90    public List JavaDoc getPathList(String JavaDoc path) {
91       return (List JavaDoc)pathLists.get(path);
92    }
93
94    public List JavaDoc getFieldList(String JavaDoc path) {
95       return (List JavaDoc)fieldLists.get(path);
96    }
97
98 }
99
100
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