01 package gate.creole.morph;
02
03 import java.util.Arrays;
04
05 /**
06 * <p>Title: </p>
07 * <p>Description: </p>
08 * <p>Copyright: Copyright (c) 2003</p>
09 * <p>Company: </p>
10 * @author not attributable
11 * @version 1.0
12 */
13
14 public class CharacterSet extends Variable {
15
16 private char [] varChars;
17 /**
18 * Constructor
19 */
20 public CharacterSet() {
21
22 }
23
24 /**
25 * Tells if any value available which can be retrieved
26 * @return true if value available, false otherwise
27 */
28 public boolean hasNext() {
29 if(pointer<varChars.length) {
30 return true;
31 } else {
32 return false;
33 }
34 }
35
36 /**
37 * Returns the next available value for this variable
38 * @return value of the variable in the String format
39 */
40 public String next() {
41 if(pointer<varChars.length) {
42 pointer++;
43 return ""+varChars[pointer-1];
44 } else {
45 return null;
46 }
47 }
48
49 /**
50 * Process the provided value and stores in the underlying data structure
51 * @param varName name of the variable
52 * @param varValue String that contains possible different values
53 * @return true if successfully stored, false otherwise
54 */
55 public boolean set(String varName, String varValue) {
56 this.varName = varName;
57 this.varValue = varValue;
58 // here the varValue would be in the following format
59 // [abcdefg] // we need to sort it, so that while searching it will be
60 // easier and faster to perform the binary search
61 varValue = varValue.substring(1,varValue.length()-1);
62 this.varChars = varValue.toCharArray();
63 Arrays.sort(this.varChars);
64 return true;
65 }
66
67 /**
68 * A method that tells if the characters of the provided value are
69 * from the characterSet only
70 * @param value String of which the characters to be searched in the
71 * characterSet
72 * @return true if all characters of value string are from the
73 * specified characterSet, false otherwise
74 */
75 public boolean contains(String value) {
76 for(int i=0;i<value.length();i++) {
77 if(Arrays.binarySearch(this.varChars,value.charAt(i))<0) {
78 return false;
79 }
80 }
81 return true;
82 }
83 }
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