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1 package org.apache.slide.projector.descriptor;
2
3 import java.io.ByteArrayInputStream  ;
4
5 import org.apache.slide.projector.Context;
6 import org.apache.slide.projector.i18n.ErrorMessage;
7 import org.apache.slide.projector.value.DocumentValue;
8 import org.apache.slide.projector.value.PrintableValue;
9 import org.apache.slide.projector.value.StreamableValue;
10 import org.apache.slide.projector.value.Value;
11 import org.apache.slide.projector.value.XMLValue;
12 import org.jdom.DocType;
13
14 public class XMLValueDescriptor implements ValueDescriptor {
15 protected boolean constrained;
16 protected DocType allowedDocType;
17
18 public XMLValueDescriptor() {
19 this.constrained = false;
20 }
21
22 public XMLValueDescriptor(String allowedDocType) {
23 this.constrained = true;
24 this.allowedDocType = new DocType(allowedDocType);
25 }
26
27 public boolean isConstrained() {
28 return constrained;
29 }
30
31 public Value valueOf(Object value, Context context) throws ValueCastException {
32 if ( value instanceof XMLValue ) {
33 return (XMLValue)value;
34 } else if ( value instanceof StreamableValue ) {
35 try {
36 return new DocumentValue(((StreamableValue)value).getInputStream());
37 } catch ( Exception e ) {
38 throw new ValueCastException(new ErrorMessage("uncastableXMLValue", new Object [] { value }), e);
39 }
40 } else if ( value instanceof PrintableValue ) {
41 try {
42 return new DocumentValue(new ByteArrayInputStream (((PrintableValue)value).toString().getBytes("UTF-8")));
43 } catch ( Exception e ) {
44 throw new ValueCastException(new ErrorMessage("uncastableXMLValue", new Object [] { value }), e);
45 }
46 }
47 throw new ValueCastException(new ErrorMessage("uncastableXMLValue", new Object [] { value }));
48 }
49
50 public void validate(Value value, Context context) throws ValidationException {
51 if ( constrained && !((XMLValue)value).getDocumentType().equals(allowedDocType)) {
52 throw new ValidationException(new ErrorMessage("invalidXMLValue", new String [] { ((XMLValue)value).getDocumentType().toString() }));
53 }
54 }
55 } |
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