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1 package org.apache.slide.projector.descriptor;
2
3 import java.util.ArrayList  ;
4 import java.util.Arrays ;
5 import java.util.Iterator ;
6 import java.util.List ;
7
8 import org.apache.slide.projector.Context;
9 import org.apache.slide.projector.i18n.ErrorMessage;
10 import org.apache.slide.projector.value.PrintableValue;
11 import org.apache.slide.projector.value.StringValue;
12 import org.apache.slide.projector.value.Value;
13
14 public class StringValueDescriptor implements ValueDescriptor {
15 public final static String UNSET = "[unset]";
16
17 public final static StringValueDescriptor ANY = new StringValueDescriptor();
18 public final static StringValueDescriptor EMPTY = new StringValueDescriptor(0);
19 public final static StringValueDescriptor NOT_EMPTY = new StringValueDescriptor(1,Integer.MAX_VALUE);
20
21 protected boolean constrained;
22 protected List allowedValues = new ArrayList ();
23 protected int minimumLength = -1, maximumLength =-1;
24 protected Value defaultValue;
25
26 public StringValueDescriptor() {
27 this.constrained = false;
28 }
29
30 public StringValueDescriptor(String [] allowedValues) {
31 this.constrained = true;
32 this.allowedValues = new ArrayList (Arrays.asList(allowedValues));
33 }
34
35 public StringValueDescriptor(int maximumLength) {
36 this.maximumLength = maximumLength;
37 this.constrained = true;
38 }
39
40 public StringValueDescriptor(int minimumLength, int maximumLength) {
41 this.minimumLength = minimumLength;
42 this.maximumLength = maximumLength;
43 this.constrained = true;
44 }
45
46 public int getMinimumLength() {
47 return minimumLength;
48 }
49
50 public void setMinimumLength(int minimumLength) {
51 this.minimumLength = minimumLength;
52 constrained = true;
53 }
54
55 public int getMaximumLength() {
56 return maximumLength;
57 }
58
59 public void setMaximumLength(int maximumLength) {
60 this.maximumLength = maximumLength;
61 constrained = true;
62 }
63
64 public void addAllowedValue(String value) {
65 constrained = true;
66 allowedValues.add(value);
67 }
68
69 public boolean isConstrained() {
70 return constrained;
71 }
72
73 public boolean isEnumrable() {
74 return ( allowedValues.size() > 0 );
75 }
76
77 public String [] getAllowedValues() {
78 return (String [])allowedValues.toArray(new String [0]);
79 }
80
81 public Value valueOf(Object value, Context context) throws ValueCastException {
82 if (value instanceof StringValue) {
83 return (StringValue)value;
84 } else if (value instanceof String ) {
85 return new StringValue((String )value);
86 } else if (value instanceof String []) {
87 return new StringValue(((String [])value)[0]);
88 } else if (value instanceof PrintableValue) {
89 return new StringValue(((PrintableValue)value).print(new StringBuffer (256)).toString());
90 }
91 throw new ValueCastException(new ErrorMessage("uncastableStringValue", new Object [] { value }));
92 }
93
94 public void validate(Value value, Context context) throws ValidationException {
95 String valueAsString = value.toString();
96 if ( constrained ) {
97 if ( isEnumrable() ) {
98 for ( Iterator i = allowedValues.iterator(); i.hasNext(); ) {
99 if (valueAsString.equals((String )i.next())) {
100 return;
101 }
102 }
103 throw new ValidationException(new ErrorMessage("invalidStringValue", new String [] { valueAsString }));
104 } else {
105 if ( minimumLength != -1 && valueAsString.length() < minimumLength ) throw new ValidationException(new ErrorMessage("stringTooShort", new Object [] { new Integer (minimumLength) }));
106 if ( maximumLength != -1 && valueAsString.length() > maximumLength ) throw new ValidationException(new ErrorMessage("stringTooLong", new Object [] { new Integer (maximumLength) }));
107 }
108 }
109 }
110 } |
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