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1 package nl.hippo.cms.workflow.queries;
2
3 import com.opensymphony.workflow.query.Expression;
4 import com.opensymphony.workflow.query.NestedExpression;
5 import java.util.ArrayList  ;
6 import java.util.Iterator ;
7 import java.util.List ;
8
9 public abstract class NAryCondition extends Condition
10 {
11
12 private List subconditions = new ArrayList ();
13
14 public NAryCondition()
15 {
16 super();
17 }
18
19 public void add(Condition condition)
20 {
21 subconditions.add(condition);
22 }
23
24 public Iterator conditionsIterator()
25 {
26 return subconditions.iterator();
27 }
28
29 public Expression toOSWorkflowExpression()
30 {
31 Expression result;
32 Expression[] subexpressions = new Expression[subconditions.size()];
33 int i = 0;
34 for (Iterator subconditionsIterator = subconditions.iterator(); subconditionsIterator.hasNext();)
35 {
36 Condition condition = (Condition) subconditionsIterator.next();
37 subexpressions[i++] = condition.toOSWorkflowExpression();
38 }
39 result = new NestedExpression(subexpressions, getOperator());
40
41 return result;
42 }
43
44 protected abstract int getOperator();
45
46 protected abstract String getOperatorText();
47
48 public void toString(StringBuffer text)
49 {
50 text.append('(');
51 boolean isFirst = true;
52 for (Iterator subconditionsIterator = subconditions.iterator(); subconditionsIterator.hasNext();)
53 {
54 if (isFirst)
55 {
56 isFirst = false;
57 }
58 else
59 {
60 text.append(' ');
61 text.append(getOperatorText());
62 text.append(' ');
63 }
64 Condition condition = (Condition) subconditionsIterator.next();
65 condition.toString(text);
66 }
67 text.append(')');
68 }
69
70 }
71 |
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