Source Code Cross Referenced for Expr.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » ejb » ql » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.ejb.ql 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.ejb.ql;
030:
031:        import com.caucho.amber.field.IdField;
032:        import com.caucho.amber.field.KeyManyToOneField;
033:        import com.caucho.amber.type.EntityType;
034:        import com.caucho.config.ConfigException;
035:        import com.caucho.ejb.cfg21.EjbEntityBean;
036:        import com.caucho.util.CharBuffer;
037:        import com.caucho.util.L10N;
038:        import com.caucho.util.Log;
039:
040:        import java.util.ArrayList;
041:        import java.util.Collection;
042:        import java.util.Collections;
043:        import java.util.logging.Logger;
044:
045:        /**
046:         * Parsed expression for EJB-QL.
047:         */
048:        public class Expr {
049:            static final Logger log = Log.open(Expr.class);
050:            static final L10N L = new L10N(Expr.class);
051:
052:            protected Query _query;
053:
054:            // The type of the expression value
055:            private Class _javaType;
056:
057:            /**
058:             * Gets the Java Type of the expression.
059:             */
060:            public Class getJavaType() {
061:                return _javaType;
062:            }
063:
064:            /**
065:             * Sets the Java Type of the expression.
066:             */
067:            void setJavaType(Class javaType) {
068:                _javaType = javaType;
069:            }
070:
071:            /**
072:             * Returns the EJB name.
073:             */
074:            String getReturnEJB() {
075:                return null;
076:            }
077:
078:            /**
079:             * Returns true for object values.
080:             */
081:            boolean isKey() {
082:                return getReturnEJB() != null;
083:            }
084:
085:            /**
086:             * True if the type is numeric.
087:             */
088:            boolean isNumeric() {
089:                Class type = getJavaType();
090:
091:                if (type == null)
092:                    return false;
093:
094:                String typeName = type.getName();
095:
096:                if ("java.lang.Byte".equals(typeName)
097:                        || "java.lang.Short".equals(typeName)
098:                        || "java.lang.Integer".equals(typeName)
099:                        || "java.lang.Long".equals(typeName)
100:                        || "java.lang.Float".equals(typeName)
101:                        || "java.lang.Double".equals(typeName))
102:                    return true;
103:                else if (!type.isPrimitive())
104:                    return false;
105:                else if (typeName.equals("boolean") || typeName.equals("char"))
106:                    return false;
107:                else
108:                    return true;
109:            }
110:
111:            /**
112:             * True if the type is integer.
113:             */
114:            boolean isInteger() {
115:                Class type = getJavaType();
116:                String typeName = type.getName();
117:
118:                return ("java.lang.Byte".equals(typeName)
119:                        || "java.lang.Short".equals(typeName)
120:                        || "java.lang.Integer".equals(typeName)
121:                        || "java.lang.Long".equals(typeName)
122:                        || "byte".equals(typeName) || "short".equals(typeName)
123:                        || "int".equals(typeName) || "long".equals(typeName));
124:            }
125:
126:            /**
127:             * True if the type is integer.
128:             */
129:            static boolean isInteger(Class type) {
130:                String typeName = type.getName();
131:
132:                return ("java.lang.Byte".equals(typeName)
133:                        || "java.lang.Short".equals(typeName)
134:                        || "java.lang.Integer".equals(typeName)
135:                        || "java.lang.Long".equals(typeName)
136:                        || "byte".equals(typeName) || "short".equals(typeName)
137:                        || "int".equals(typeName) || "long".equals(typeName));
138:            }
139:
140:            int getComponentCount() {
141:                return 1;
142:            }
143:
144:            /**
145:             * True if the type is a string.
146:             */
147:            boolean isString() {
148:                Class type = getJavaType();
149:                String typeName = type.getName();
150:
151:                return ("java.lang.String".equals(typeName)
152:                        || "char".equals(typeName) || "java.lang.Character"
153:                        .equals(typeName));
154:            }
155:
156:            /**
157:             * True if the type is a boolean.
158:             */
159:            boolean isBoolean() {
160:                Class type = getJavaType();
161:                String typeName = type.getName();
162:
163:                return ("boolean".equals(typeName) || "java.lang.Boolean"
164:                        .equals(typeName));
165:            }
166:
167:            /**
168:             * True if the type is a date.
169:             */
170:            boolean isDate() {
171:                Class type = getJavaType();
172:                String typeName = type.getName();
173:
174:                return ("java.util.Date".equals(typeName)
175:                        || "java.sql.Timestamp".equals(typeName)
176:                        || "java.sql.Date".equals(typeName) || "java.sql.Time"
177:                        .equals(typeName));
178:            }
179:
180:            /**
181:             * Only args can be coerced.
182:             */
183:            boolean canCoerce() {
184:                return false;
185:            }
186:
187:            /**
188:             * True if the type is a collection.
189:             */
190:            boolean isCollection() {
191:                Class type = getJavaType();
192:
193:                return Collection.class.isAssignableFrom(type);
194:            }
195:
196:            /**
197:             * True if the bean refers to an external entity bean.
198:             */
199:            boolean isExternal() {
200:                return false;
201:            }
202:
203:            /**
204:             * Returns the item bean of a collection.
205:             */
206:            EjbEntityBean getItemBean() {
207:                return null;
208:            }
209:
210:            /**
211:             * Creates a field expression from this expression.
212:             */
213:            Expr newField(String field) throws ConfigException {
214:                throw error(L
215:                        .l(
216:                                "'{0}' can't have field '{1}'.  Only path expressions referring to a single bean have fields.",
217:                                this , field));
218:            }
219:
220:            /**
221:             * Creates an external entity reference from this expression.
222:             */
223:            FieldExpr newReference(String field) throws ConfigException {
224:                throw error(L
225:                        .l("'{0}' can't have reference '{1}'", this , field));
226:            }
227:
228:            /**
229:             * Evaluates the types for the expression
230:             */
231:            void evalTypes() throws ConfigException {
232:                if (getJavaType() == null)
233:                    throw error(L.l("'{0}' has no type.", this ) + getClass());
234:            }
235:
236:            /**
237:             * Prints the select SQL for this expression
238:             */
239:            void generateSelect(CharBuffer cb) {
240:                generateWhere(cb);
241:            }
242:
243:            /**
244:             * Returns the select's table
245:             */
246:            String getSelectTable(CharBuffer cb) throws ConfigException {
247:                throw new IllegalStateException(L.l(
248:                        "'{0}' can't be used in a SELECT expression", this ));
249:            }
250:
251:            /**
252:             * Prints the where SQL for this expression
253:             */
254:            void generateWhere(CharBuffer cb) {
255:                throw new IllegalStateException(L.l(
256:                        "{0}: '{1}' can't be used in a WHERE expression",
257:                        getClass().getName(), this ));
258:            }
259:
260:            /**
261:             * Prints the where SQL for this expression
262:             */
263:            void generateWhereSubExpr(CharBuffer cb) {
264:                generateWhere(cb);
265:            }
266:
267:            /**
268:             * Prints the where SQL for this expression
269:             */
270:            void generateComponent(CharBuffer cb, int i) {
271:                if (i == 0)
272:                    generateWhereSubExpr(cb);
273:                else
274:                    throw new IllegalStateException(L.l(
275:                            "'{0}' can't be used in a WHERE multi-component",
276:                            this ));
277:            }
278:
279:            protected String keyComponent(EntityType type, int index) {
280:                ArrayList<String> names = new ArrayList<String>();
281:
282:                addKeys(names, type, "");
283:
284:                Collections.sort(names);
285:
286:                return names.get(index);
287:            }
288:
289:            protected void addKeys(ArrayList<String> names, EntityType type,
290:                    String prefix) {
291:                for (IdField key : type.getId().getKeys()) {
292:                    if (key instanceof  KeyManyToOneField) {
293:                        KeyManyToOneField manyToOne = (KeyManyToOneField) key;
294:
295:                        addKeys(names, manyToOne.getEntityType(), prefix
296:                                + key.getName() + ".");
297:                    } else
298:                        names.add(prefix + key.getName());
299:                }
300:            }
301:
302:            /**
303:             * Creates an error.
304:             */
305:            ConfigException error(String msg) {
306:                if (_query != null)
307:                    return _query.error(msg);
308:                else
309:                    return new ConfigException(msg);
310:            }
311:
312:            /**
313:             * Creates an error.
314:             */
315:            ConfigException error(Query query, String msg) {
316:                return query.error(msg);
317:            }
318:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.