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1
10 package mondrian.olap.fun;
11
12 import mondrian.calc.Calc;
13 import mondrian.calc.ExpCompiler;
14 import mondrian.calc.ListCalc;
15 import mondrian.calc.impl.AbstractStringCalc;
16 import mondrian.mdx.ResolvedFunCall;
17 import mondrian.olap.Evaluator;
18 import mondrian.olap.Member;
19 import mondrian.olap.Exp;
20 import mondrian.olap.type.SetType;
21
22 import java.util.List  ;
23
24
31 class SetToStrFunDef extends FunDefBase {
32 public static final FunDefBase instance = new SetToStrFunDef();
33
34 private SetToStrFunDef() {
35 super("SetToStr", "SetToStr(<Set>)", "Constructs a string from a set.", "fSx");
36 }
37
38 public Calc compileCall(ResolvedFunCall call, ExpCompiler compiler) {
39 Exp arg = call.getArg(0);
40 final ListCalc listCalc = compiler.compileList(arg);
41 if (((SetType) arg.getType()).getArity() == 1) {
42 return new AbstractStringCalc(call, new Calc[] {listCalc}) {
43 public String evaluateString(Evaluator evaluator) {
44 final List <Member> list =
45 (List <Member>) listCalc.evaluateList(evaluator);
46 return memberSetToStr(list);
47 }
48 };
49 } else {
50 return new AbstractStringCalc(call, new Calc[] {listCalc}) {
51 public String evaluateString(Evaluator evaluator) {
52 final List <Member[]> list =
53 (List <Member[]>) listCalc.evaluateList(evaluator);
54 return tupleSetToStr(list);
55 }
56 };
57 }
58 }
59
60 static String memberSetToStr(List <Member> list) {
61 StringBuilder buf = new StringBuilder ();
62 buf.append("{");
63 int k = 0;
64 for (Member member : list) {
65 if (k++ > 0) {
66 buf.append(", ");
67 }
68 buf.append(member.getUniqueName());
69 }
70 buf.append("}");
71 return buf.toString();
72 }
73
74 static String tupleSetToStr(List <Member[]> list) {
75 StringBuilder buf = new StringBuilder ();
76 buf.append("{");
77 int k = 0;
78 for (Member[] members : list) {
79 if (k++ > 0) {
80 buf.append(", ");
81 }
82 appendTuple(buf, members);
83 }
84 buf.append("}");
85 return buf.toString();
86 }
87 }
88
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