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16 package org.apache.neethi;
17
18 import javax.xml.namespace.QName;
19 import javax.xml.stream.XMLStreamException;
20 import javax.xml.stream.XMLStreamWriter;
21
22 /**
23 * This is an interface that any Assertion must implement. Hence any domain
24 * specific type can be used with this framework if it implements this
25 * interface.
26 */
27 public interface Assertion extends PolicyComponent {
28
29 /**
30 * Returns the QName of the Root Element of this Assertion.
31 *
32 * @return QName the QName of the Root Element of this Assertion.
33 */
34 public QName getName();
35
36 /**
37 * Returns true if this Assertion is optional. Returns false otherwise.
38 *
39 * @return true if the assertion is optional.
40 */
41 public boolean isOptional();
42
43 /**
44 * Serialize this Assertion into its XML infoset using XMLStreamWriter.
45 */
46 public void serialize(XMLStreamWriter writer) throws XMLStreamException;
47
48 /**
49 * Returns a new PolicyComponent that is the normalized version of this.
50 */
51 public PolicyComponent normalize();
52 }