1 |
|
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
6 |
|
|
7 |
|
|
8 |
|
|
9 |
|
|
10 |
|
|
11 |
|
|
12 |
|
|
13 |
|
|
14 |
|
|
15 |
|
|
16 |
|
|
17 |
|
package org.apache.camel.builder; |
18 |
|
|
19 |
|
import org.apache.camel.Exchange; |
20 |
|
import org.apache.camel.Expression; |
21 |
|
|
22 |
|
import java.util.ArrayList; |
23 |
|
import java.util.List; |
24 |
|
import java.util.StringTokenizer; |
25 |
|
import java.util.Arrays; |
26 |
|
import java.util.regex.Pattern; |
27 |
|
|
28 |
|
|
29 |
|
|
30 |
|
|
31 |
0 |
public class ExpressionBuilder { |
32 |
|
|
33 |
|
|
34 |
|
|
35 |
|
|
36 |
|
|
37 |
|
|
38 |
|
|
39 |
|
|
40 |
|
public static <E extends Exchange> Expression<E> headerExpression(final String headerName) { |
41 |
35 |
return new Expression<E>() { |
42 |
|
public Object evaluate(E exchange) { |
43 |
41 |
Object header = exchange.getIn().getHeader(headerName); |
44 |
41 |
if (header == null) { |
45 |
|
|
46 |
0 |
header = exchange.getProperty(headerName); |
47 |
|
} |
48 |
41 |
return header; |
49 |
|
} |
50 |
|
|
51 |
|
|
52 |
|
@Override |
53 |
35 |
public String toString() { |
54 |
68 |
return "header(" + headerName + ")"; |
55 |
|
} |
56 |
|
}; |
57 |
|
} |
58 |
|
|
59 |
|
|
60 |
|
|
61 |
|
|
62 |
|
|
63 |
|
|
64 |
|
|
65 |
|
public static <E extends Exchange> Expression<E> propertyExpression(final String propertyName) { |
66 |
0 |
return new Expression<E>() { |
67 |
|
public Object evaluate(E exchange) { |
68 |
0 |
return exchange.getProperty(propertyName); |
69 |
|
} |
70 |
|
|
71 |
|
@Override |
72 |
0 |
public String toString() { |
73 |
0 |
return "property(" + propertyName + ")"; |
74 |
|
} |
75 |
|
}; |
76 |
|
} |
77 |
|
|
78 |
|
|
79 |
|
|
80 |
|
|
81 |
|
|
82 |
|
|
83 |
|
|
84 |
|
public static <E extends Exchange> Expression<E> constantExpression(final Object value) { |
85 |
108 |
return new Expression<E>() { |
86 |
|
public Object evaluate(E exchange) { |
87 |
26 |
return value; |
88 |
|
} |
89 |
|
|
90 |
|
@Override |
91 |
108 |
public String toString() { |
92 |
184 |
return "" + value; |
93 |
|
} |
94 |
|
}; |
95 |
|
} |
96 |
|
|
97 |
|
|
98 |
|
|
99 |
|
|
100 |
|
public static <E extends Exchange> Expression<E> bodyExpression() { |
101 |
4 |
return new Expression<E>() { |
102 |
|
public Object evaluate(E exchange) { |
103 |
12 |
return exchange.getIn().getBody(); |
104 |
|
} |
105 |
|
|
106 |
|
@Override |
107 |
4 |
public String toString() { |
108 |
5 |
return "body"; |
109 |
|
} |
110 |
|
}; |
111 |
|
} |
112 |
|
|
113 |
|
|
114 |
|
|
115 |
|
|
116 |
|
|
117 |
|
public static <E extends Exchange, T> Expression<E> bodyExpression(final Class<T> type) { |
118 |
1 |
return new Expression<E>() { |
119 |
|
public Object evaluate(E exchange) { |
120 |
0 |
return exchange.getIn().getBody(type); |
121 |
|
} |
122 |
|
|
123 |
|
@Override |
124 |
1 |
public String toString() { |
125 |
4 |
return "bodyAs[" + type.getName() + "]"; |
126 |
|
} |
127 |
|
}; |
128 |
|
} |
129 |
|
|
130 |
|
|
131 |
|
|
132 |
|
|
133 |
|
public static <E extends Exchange> Expression<E> outBodyExpression() { |
134 |
0 |
return new Expression<E>() { |
135 |
|
public Object evaluate(E exchange) { |
136 |
0 |
return exchange.getOut().getBody(); |
137 |
|
} |
138 |
|
|
139 |
|
@Override |
140 |
0 |
public String toString() { |
141 |
0 |
return "outBody"; |
142 |
|
} |
143 |
|
}; |
144 |
|
} |
145 |
|
|
146 |
|
|
147 |
|
|
148 |
|
|
149 |
|
public static <E extends Exchange> Expression<E> exchangeExpression() { |
150 |
0 |
return new Expression<E>() { |
151 |
|
public Object evaluate(E exchange) { |
152 |
0 |
return exchange; |
153 |
|
} |
154 |
|
|
155 |
|
@Override |
156 |
0 |
public String toString() { |
157 |
0 |
return "exchange"; |
158 |
|
} |
159 |
|
}; |
160 |
|
} |
161 |
|
|
162 |
|
|
163 |
|
|
164 |
|
|
165 |
|
public static <E extends Exchange> Expression<E> inMessageExpression() { |
166 |
0 |
return new Expression<E>() { |
167 |
|
public Object evaluate(E exchange) { |
168 |
0 |
return exchange.getIn(); |
169 |
|
} |
170 |
|
|
171 |
|
@Override |
172 |
0 |
public String toString() { |
173 |
0 |
return "inMessage"; |
174 |
|
} |
175 |
|
}; |
176 |
|
} |
177 |
|
|
178 |
|
|
179 |
|
|
180 |
|
|
181 |
|
public static <E extends Exchange> Expression<E> convertTo(final Expression expression, final Class type) { |
182 |
0 |
return new Expression<E>() { |
183 |
|
public Object evaluate(E exchange) { |
184 |
0 |
Object value = expression.evaluate(exchange); |
185 |
0 |
return exchange.getContext().getTypeConverter().convertTo(type, value); |
186 |
|
} |
187 |
|
|
188 |
|
@Override |
189 |
0 |
public String toString() { |
190 |
0 |
return "convertTo(" + expression + ", " + type + ")"; |
191 |
|
} |
192 |
|
}; |
193 |
|
} |
194 |
|
|
195 |
|
|
196 |
|
|
197 |
|
|
198 |
|
public static <E extends Exchange> Expression<E> tokenizeExpression(final Expression<E> expression, final String token) { |
199 |
3 |
return new Expression<E>() { |
200 |
|
public Object evaluate(E exchange) { |
201 |
2 |
String text = evaluateStringExpression(expression, exchange); |
202 |
2 |
if (text == null) { |
203 |
0 |
return null; |
204 |
|
} |
205 |
2 |
StringTokenizer iter = new StringTokenizer(text, token); |
206 |
2 |
List<String> answer = new ArrayList<String>(); |
207 |
9 |
while (iter.hasMoreTokens()) { |
208 |
7 |
answer.add(iter.nextToken()); |
209 |
7 |
} |
210 |
2 |
return answer; |
211 |
|
} |
212 |
|
|
213 |
|
@Override |
214 |
3 |
public String toString() { |
215 |
6 |
return "tokenize(" + expression + ", " + token + ")"; |
216 |
|
} |
217 |
|
}; |
218 |
|
} |
219 |
|
|
220 |
|
|
221 |
|
|
222 |
|
|
223 |
|
public static <E extends Exchange> Expression<E> regexTokenize(final Expression<E> expression, String regexTokenizer) { |
224 |
3 |
final Pattern pattern = Pattern.compile(regexTokenizer); |
225 |
3 |
return new Expression<E>() { |
226 |
|
public Object evaluate(E exchange) { |
227 |
4 |
String text = evaluateStringExpression(expression, exchange); |
228 |
4 |
if (text == null) { |
229 |
0 |
return null; |
230 |
|
} |
231 |
4 |
return Arrays.asList(pattern.split(text)); |
232 |
|
} |
233 |
|
|
234 |
|
@Override |
235 |
3 |
public String toString() { |
236 |
6 |
return "regexTokenize(" + expression + ", " + pattern.pattern() + ")"; |
237 |
|
} |
238 |
|
}; |
239 |
|
} |
240 |
|
|
241 |
|
|
242 |
|
|
243 |
|
|
244 |
|
public static <E extends Exchange> Expression<E> regexReplaceAll(final Expression<E> expression, String regex, final String replacement) { |
245 |
1 |
final Pattern pattern = Pattern.compile(regex); |
246 |
1 |
return new Expression<E>() { |
247 |
|
public Object evaluate(E exchange) { |
248 |
1 |
String text = evaluateStringExpression(expression, exchange); |
249 |
1 |
if (text == null) { |
250 |
0 |
return null; |
251 |
|
} |
252 |
1 |
return pattern.matcher(text).replaceAll(replacement); |
253 |
|
} |
254 |
|
|
255 |
|
@Override |
256 |
1 |
public String toString() { |
257 |
2 |
return "regexReplaceAll(" + expression + ", " + pattern.pattern() + ")"; |
258 |
|
} |
259 |
|
}; |
260 |
|
} |
261 |
|
|
262 |
|
|
263 |
|
|
264 |
|
|
265 |
|
public static <E extends Exchange> Expression<E> regexReplaceAll(final Expression<E> expression, String regex, final Expression<E> replacementExpression) { |
266 |
1 |
final Pattern pattern = Pattern.compile(regex); |
267 |
1 |
return new Expression<E>() { |
268 |
|
public Object evaluate(E exchange) { |
269 |
1 |
String text = evaluateStringExpression(expression, exchange); |
270 |
1 |
String replacement = evaluateStringExpression(replacementExpression, exchange);; |
271 |
1 |
if (text == null || replacement == null) { |
272 |
0 |
return null; |
273 |
|
} |
274 |
1 |
return pattern.matcher(text).replaceAll(replacement); |
275 |
|
} |
276 |
|
|
277 |
|
@Override |
278 |
1 |
public String toString() { |
279 |
2 |
return "regexReplaceAll(" + expression + ", " + pattern.pattern() + ")"; |
280 |
|
} |
281 |
|
}; |
282 |
|
} |
283 |
|
|
284 |
|
|
285 |
|
|
286 |
|
|
287 |
|
|
288 |
|
public static <E extends Exchange> Expression<E> append(final Expression<E> left, final Expression<E> right) { |
289 |
1 |
return new Expression<E>() { |
290 |
|
public Object evaluate(E exchange) { |
291 |
1 |
return evaluateStringExpression(left, exchange) + evaluateStringExpression(right, exchange); |
292 |
|
} |
293 |
|
|
294 |
|
@Override |
295 |
1 |
public String toString() { |
296 |
1 |
return "append(" + left + ", " + right + ")"; |
297 |
|
} |
298 |
|
}; |
299 |
|
} |
300 |
|
|
301 |
|
|
302 |
|
|
303 |
|
|
304 |
|
|
305 |
|
|
306 |
|
|
307 |
|
|
308 |
|
public static <E extends Exchange> String evaluateStringExpression(Expression<E> expression, E exchange) { |
309 |
11 |
Object value = expression.evaluate(exchange); |
310 |
11 |
return exchange.getContext().getTypeConverter().convertTo(String.class, value); |
311 |
|
} |
312 |
|
|
313 |
|
|
314 |
|
|
315 |
|
|
316 |
|
public static <E extends Exchange> Expression<E> systemProperty(final String name) { |
317 |
0 |
return systemProperty(name, null); |
318 |
|
} |
319 |
|
|
320 |
|
|
321 |
|
|
322 |
|
|
323 |
|
public static <E extends Exchange> Expression<E> systemProperty(final String name, final String defaultValue) { |
324 |
0 |
return new Expression<E>() { |
325 |
0 |
public Object evaluate(E exchange) { |
326 |
0 |
return System.getProperty(name, defaultValue); |
327 |
|
} |
328 |
|
}; |
329 |
|
} |
330 |
|
} |