|
1
28 package net.sf.jasperreports.compilers;
29
30 import java.io.IOException  ;
31 import java.io.LineNumberReader ;
32 import java.io.StringReader ;
33 import java.util.Collection ;
34 import java.util.Iterator ;
35 import java.util.Map ;
36
37 import net.sf.jasperreports.engine.JRException;
38 import net.sf.jasperreports.engine.JRExpression;
39 import net.sf.jasperreports.engine.fill.JREvaluator;
40 import bsh.EvalError;
41 import bsh.Interpreter;
42 import bsh.TargetError;
43
44
45
49 public class JRBshEvaluator extends JREvaluator
50 {
51
52
53
56 private String bshScript = null;
57 private Interpreter interpreter = null;
58
59
60
63 public JRBshEvaluator(String bshScript) throws JRException
64 {
65 super();
66
67 this.bshScript = bshScript;
68
69 interpreter = new Interpreter();
70
71 interpreter.setClassLoader(Thread.currentThread().getContextClassLoader());
72
73 try
74 {
75 interpreter.eval(new StringReader (bshScript));
76 }
77 catch(EvalError e)
78 {
79 throw new JRException(
80 "Error evaluating report expressions BeanShell script."
81 + "\nMessage : " + e.getMessage()
82 + "\nLine " + e.getErrorLineNumber() + " : " + extractLineContent(e)
83 );
84 }
85 }
86
87
88
91 public void verify(Collection expressions) throws JRException
92 {
93 try
94 {
95 interpreter.eval("bshEvaluator = createBshEvaluator()");
96
97 if (expressions != null)
98 {
99 for(Iterator it = expressions.iterator(); it.hasNext();)
100 {
101 JRExpression expression = (JRExpression)it.next();
102 interpreter.eval("bshEvaluator.evaluateOld(" + expression.getId() + ")");
103 }
104 }
105 }
106 catch(TargetError te)
107 {
108 }
110 catch(EvalError e)
111 {
112 throw new JRException(
113 "Error testing report expressions BeanShell script."
114 + "\nMessage : " + e.getMessage()
115 + "\nLine " + e.getErrorLineNumber() + " : " + extractLineContent(e)
116 );
117 }
118 }
119
120
121
124 protected void customizedInit(
125 Map pars,
126 Map fldsm,
127 Map varsm
128 ) throws JRException
129 {
130 try
131 {
132 interpreter.set("calculator", this);
133 interpreter.set("fldsm", fldsm);
134 interpreter.set("varsm", varsm);
135 interpreter.set("parsm", pars);
136 interpreter.eval("bshEvaluator = createBshEvaluator()");
137 interpreter.eval("bshEvaluator.init(calculator, parsm, fldsm, varsm)");
138 }
139 catch(EvalError e)
140 {
141 throw new JRException("Error initializing report BeanShell calculator.", e);
142 }
143 }
144
145
146
149 protected Object evaluateOld(int id) throws Throwable
150 {
151 try
152 {
153 return interpreter.eval("bshEvaluator.evaluateOld(" + id + ")");
154 }
155 catch(TargetError te)
156 {
157 throw te.getTarget();
158 }
159 catch(EvalError ee)
160 {
161 throw ee;
162 }
163 }
164
165
166
169 protected Object evaluateEstimated(int id) throws Throwable
170 {
171 try
172 {
173 return interpreter.eval("bshEvaluator.evaluateEstimated(" + id + ")");
174 }
175 catch(TargetError te)
176 {
177 throw te.getTarget();
178 }
179 catch(EvalError ee)
180 {
181 throw ee;
182 }
183 }
184
185
186
189 protected Object evaluate(int id) throws Throwable
190 {
191 try
192 {
193 return interpreter.eval("bshEvaluator.evaluate(" + id + ")");
194 }
195 catch(TargetError te)
196 {
197 throw te.getTarget();
198 }
199 catch(EvalError ee)
200 {
201 throw ee;
202 }
203 }
204
205
206
209 private String extractLineContent(EvalError e)
210 {
211 String lineContent = "";
212
213 LineNumberReader reader = null;
214
215 try
216 {
217 reader = new LineNumberReader (new StringReader (bshScript));
218 int lineNumber = e.getErrorLineNumber();
219
220 for(int i = 0; i < lineNumber; i++)
221 {
222 lineContent = reader.readLine();
223 }
224 }
225 catch(IOException ioe)
226 {
227 }
228 finally
229 {
230 if (reader != null)
231 {
232 try
233 {
234 reader.close();
235 }
236 catch(IOException ioe)
237 {
238 }
239 }
240 }
241
242 return lineContent;
243 }
244
245
246 }
247 |
Popular Tags |
Java API By Example, From Geeks To Geeks.