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1 package fr.improve.struts.taglib.layout.el;
2
3 import javax.servlet.jsp.PageContext  ;
4
5
8 public class AddBlock implements Block {
9 private Block left;
10 private Block right;
11
12 public AddBlock(Block in_left,Block in_right) {
13 left = in_left;
14 right = in_right;
15 }
16
17 public String evaluate(PageContext in_pg) throws EvaluationException {
18 String leftAsString = left.evaluate(in_pg);
19 String rightAsString = right.evaluate(in_pg);
20 try {
21 int left = Integer.parseInt(leftAsString);
22 int right = Integer.parseInt(rightAsString);
23 return String.valueOf(left+right);
24 } catch (NumberFormatException e) {
25 throw new EvaluationException("Operand is not a number : " + leftAsString + " + " + rightAsString);
26 }
27 }
28
29 public String toString() {
30 return new StringBuffer ("[A( ").append(left.toString()).append(" , ").append(right.toString()).append(" )]").toString();
31 }
32
33
34 }
35 |
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