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1
6
7 package SOFA.Connector.ECG;
8
9
14 public class VariableExpander {
15
16 protected java.util.HashMap  subst;
17
18
19 public VariableExpander() {
20 subst=new java.util.HashMap ();
21 }
22
23 public void addSubst(String var, String value) throws VariableExpanderAmbiguityException {
24 String prev;
25 prev=(String )subst.get(var);
26 if (prev!=null) {
27 if (!prev.equals(value)) {
28 throw new VariableExpanderAmbiguityException("Duplicate and ambiguious definition of variable '"+var+"'.");
29 }
30 } else {
31 subst.put(var,value);
32 }
33 }
34
35 public String expand(String name) throws VariableExpanderUnresolvedNameException {
36 int i, start, end, len=name.length();
37 StringBuffer str=new StringBuffer ();
38 String inStr;
39
40 for (i=0;i<len;i++) {
41 start=name.indexOf('{',i);
42
43 if (start==-1 || !(start<len-2 && (end=name.indexOf('}',start+2))!=-1)) {
44 str.append(name.substring(i));
45 break;
46 } else if (start>0) {
47 str.append(name.substring(i,start));
48 }
49
50 i=end;
51
52 inStr=name.substring(start+1,end);
53 if ((end=inStr.lastIndexOf(':'))==-1 || end==inStr.length()-1) {
54 String val=(String )subst.get(inStr);
55 str.append(val);
56 } else {
57 String val=(String )subst.get(inStr.substring(end+1));
58 String prefix=inStr.substring(0,end);
59
60 end=val.lastIndexOf('.');
61 if (end!=-1) {
62 str.append(val.substring(0,end+1));
63 }
64 str.append(prefix);
65 if (end<val.length()-1) {
66 str.append(val.substring(end+1));
67 }
68 }
69 }
70 return str.toString();
71 }
72
73 static public String extractVariable(String name) {
74 try {
75 byte[] varName=name.getBytes();
76
77 if (varName.length>2 && varName[0]=='{' && varName[varName.length-1]=='}') {
78 int i;
79
80 for (i=1;i<varName.length-2;i++) {
81 if (varName[i]=='}') {
82 return null;
83 }
84 }
85 }
86 return name.substring(1,name.length()-1);
87 } catch (ArrayIndexOutOfBoundsException e) {
88 return null;
89 } catch (IndexOutOfBoundsException e) {
90 return null;
91 }
92 }
93
94 }
95 |
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