01 package gate.creole.morph;
02
03 import java.util.ArrayList;
04
05 /**
06 * <p>Title: StringSet </p>
07 * <p>Description: This is one of the variable types that is allowed to define.
08 * It stores different possible strings for this variable
09 * The format of the value of this variable should be </p>
10 * <p> "string1" OR "string2" OR "string3" ... </p>
11 */
12
13 public class StringSet extends Variable {
14
15 private String varName;
16 private ArrayList variables;
17
18 /**
19 * Constructor
20 */
21 public StringSet() {
22 variables = new ArrayList();
23 }
24
25 /**
26 * Tells if any value available which can be retrieved
27 * @return true if value available, false otherwise
28 */
29 public boolean hasNext() {
30 if(pointer<variables.size()) {
31 return true;
32 } else {
33 return false;
34 }
35 }
36
37 /**
38 * Returns the next available value for this variable
39 * @return value of the variable in the String format
40 */
41 public String next() {
42 if(pointer<variables.size()) {
43 pointer++;
44 return (String)(variables.get(pointer-1));
45 } else {
46 return null;
47 }
48 }
49
50 /**
51 * Process the provided value and stores in the underlying data structure
52 * @param varName name of the variable
53 * @param varValue String that contains possible different values
54 * @return true if successfully stored, false otherwise (means some syntax error)
55 */
56 public boolean set(String varName, String varValue) {
57 this.varName = varName;
58 this.varValue = "";
59 // now we need to process the varValue
60 // lets first split between the | sign
61
62 String [] values = varValue.split(" OR ");
63 //check for its syntax
64 for(int i=0;i<values.length;i++) {
65
66 // remove all extra spaces
67 values[i] = values[i].trim();
68
69 // now check if it has been qouted properly
70 if(values[i].length()<3 || !(values[i].charAt(0)=='\"') || !(values[i].charAt(values[i].length()-1)=='\"')) {
71 return false;
72 } else {
73 values[i] = values[i].substring(1,values[i].length()-1);
74 }
75 }
76
77 // store each value in the arrayList
78 for(int i=0;i<values.length;i++) {
79 variables.add(values[i]);
80 this.varValue = this.varValue + "("+values[i]+")";
81 if ((i+1) != values.length) {
82 this.varValue = this.varValue + "|";
83 }
84 }
85 return true;
86 }
87
88 /**
89 * A method that tells if value is available in the StringSet
90 * @param value String that is to be searched in the String set
91 * @return true if value found in the StringSet, false otherwise
92 */
93 public boolean contains(String value) {
94 return variables.contains(value);
95 }
96 }
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