Source Code Cross Referenced for NewJavaExpr.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » xpath » expr » 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.xpath.expr 
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.xpath.expr;
030:
031:        import com.caucho.util.CharBuffer;
032:        import com.caucho.xpath.Expr;
033:        import com.caucho.xpath.ExprEnvironment;
034:        import com.caucho.xpath.XPathException;
035:
036:        import org.w3c.dom.Node;
037:
038:        import java.lang.reflect.Constructor;
039:        import java.util.ArrayList;
040:
041:        /**
042:         * Implements the static java extension functions.
043:         */
044:        public class NewJavaExpr extends Expr {
045:            private static final int J_BOOLEAN = 1;
046:            private static final int J_BYTE = J_BOOLEAN + 1;
047:            private static final int J_SHORT = J_BYTE + 1;
048:            private static final int J_INT = J_SHORT + 1;
049:            private static final int J_LONG = J_INT + 1;
050:            private static final int J_FLOAT = J_LONG + 1;
051:            private static final int J_DOUBLE = J_FLOAT + 1;
052:            private static final int J_STRING = J_DOUBLE + 1;
053:            private static final int J_OBJECT = J_STRING + 1;
054:
055:            // Code of the expression defined in Expr
056:            private Constructor constructor;
057:            // Arguments for more than 3.
058:            private ArrayList args;
059:            private int[] argTypes;
060:
061:            private int retType;
062:
063:            /**
064:             * Create a StringExpression with three arguments.
065:             *
066:             * @param method Java method
067:             * @param args the arguments
068:             */
069:            public NewJavaExpr(Constructor constructor, ArrayList args) {
070:                this .constructor = constructor;
071:                this .args = args;
072:
073:                argTypes = new int[args.size()];
074:                Class[] paramClasses = constructor.getParameterTypes();
075:                for (int i = 0; i < paramClasses.length; i++)
076:                    argTypes[i] = classToType(paramClasses[i]);
077:
078:                retType = classToType(constructor.getDeclaringClass());
079:            }
080:
081:            private int classToType(Class cl) {
082:                if (boolean.class.equals(cl) || Boolean.class.equals(cl))
083:                    return J_BOOLEAN;
084:                else if (byte.class.equals(cl) || Byte.class.equals(cl))
085:                    return J_BYTE;
086:                else if (short.class.equals(cl) || Short.class.equals(cl))
087:                    return J_SHORT;
088:                else if (int.class.equals(cl) || Integer.class.equals(cl))
089:                    return J_INT;
090:                else if (long.class.equals(cl) || Long.class.equals(cl))
091:                    return J_LONG;
092:                else if (float.class.equals(cl) || Float.class.equals(cl))
093:                    return J_FLOAT;
094:                else if (double.class.equals(cl) || Double.class.equals(cl))
095:                    return J_DOUBLE;
096:                else if (String.class.equals(cl))
097:                    return J_STRING;
098:                else
099:                    return J_OBJECT;
100:            }
101:
102:            /**
103:             * True if it returns a string.
104:             */
105:            public boolean isString() {
106:                return retType == J_STRING;
107:            }
108:
109:            /**
110:             * True if this returns a boolean.
111:             */
112:            public boolean isBoolean() {
113:                return retType == J_BOOLEAN;
114:            }
115:
116:            /**
117:             * True if this returns a boolean.
118:             */
119:            public boolean isNumber() {
120:                return retType >= J_BYTE && retType <= J_DOUBLE;
121:            }
122:
123:            /**
124:             * Evaluates the expression as an string.
125:             *
126:             * @param node the current node
127:             * @param env the variable environment.
128:             *
129:             * @return the string representation of the expression.
130:             */
131:            public String evalString(Node node, ExprEnvironment env)
132:                    throws XPathException {
133:                Object value = evalObject(node, env);
134:
135:                return String.valueOf(value);
136:            }
137:
138:            /**
139:             * Evaluate the expression as a boolean, i.e. evaluate it as a string
140:             * and then convert it to a boolean.
141:             *
142:             * @param node the current node
143:             * @param env the variable environment.
144:             *
145:             * @return the boolean representation of the expression.
146:             */
147:            public boolean evalBoolean(Node node, ExprEnvironment env)
148:                    throws XPathException {
149:                return toBoolean(evalObject(node, env));
150:            }
151:
152:            /**
153:             * Evaluate the expression as a double, i.e. evaluate it as a string
154:             * and then convert it to a double.
155:             *
156:             * @param node the current node
157:             * @param env the variable environment.
158:             *
159:             * @return the numeric representation of the expression.
160:             */
161:            public double evalNumber(Node node, ExprEnvironment env)
162:                    throws XPathException {
163:                return toDouble(evalObject(node, env));
164:            }
165:
166:            /**
167:             * Evaluate the expression as an object, i.e. return the string value.
168:             *
169:             * @param node the current node
170:             * @param env the variable environment.
171:             *
172:             * @return the boolean representation of the expression.
173:             */
174:            public Object evalObject(Node node, ExprEnvironment env)
175:                    throws XPathException {
176:                Object[] argArray = new Object[args.size()];
177:
178:                for (int i = 0; i < argArray.length; i++) {
179:                    Expr expr = (Expr) args.get(i);
180:
181:                    switch (argTypes[i]) {
182:                    case J_BOOLEAN:
183:                        argArray[i] = new Boolean(expr.evalBoolean(node, env));
184:                        break;
185:                    case J_BYTE:
186:                        argArray[i] = new Byte((byte) expr
187:                                .evalNumber(node, env));
188:                        break;
189:                    case J_SHORT:
190:                        argArray[i] = new Short((short) expr.evalNumber(node,
191:                                env));
192:                        break;
193:                    case J_INT:
194:                        argArray[i] = new Integer((int) expr.evalNumber(node,
195:                                env));
196:                        break;
197:                    case J_LONG:
198:                        argArray[i] = new Long((long) expr
199:                                .evalNumber(node, env));
200:                        break;
201:                    case J_FLOAT:
202:                        argArray[i] = new Float((float) expr.evalNumber(node,
203:                                env));
204:                        break;
205:                    case J_DOUBLE:
206:                        argArray[i] = new Double(expr.evalNumber(node, env));
207:                        break;
208:                    case J_STRING:
209:                        argArray[i] = expr.evalString(node, env);
210:                        break;
211:                    default:
212:                        argArray[i] = expr.evalObject(node, env);
213:                        break;
214:                    }
215:                }
216:
217:                try {
218:                    return constructor.newInstance(argArray);
219:                } catch (Exception e) {
220:                    throw new XPathException(e);
221:                }
222:            }
223:
224:            /**
225:             * Return the expression as a string.  toString() returns a valid
226:             * XPath expression.  This lets applications like XSLT use toString()
227:             * to print the string in the generated Java.
228:             */
229:            public String toString() {
230:                CharBuffer cb = CharBuffer.allocate();
231:                cb.append("java:");
232:                cb.append(constructor.getDeclaringClass().getName());
233:                cb.append(".new");
234:
235:                cb.append("(");
236:                for (int i = 0; i < args.size(); i++) {
237:                    if (i != 0)
238:                        cb.append(",");
239:                    cb.append(args.get(i));
240:                }
241:                cb.append(")");
242:
243:                return cb.close();
244:            }
245:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.