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public interface FieldHandler
A field handler knows how to perform various operations on the field that require access to the field value.
FieldDescriptor
Method Summary | |
---|---|
void |
checkValidity(java.lang.Object object)
Deprecated. No longer supported |
java.lang.Object |
getValue(java.lang.Object object)
Returns the value of the field from the object. |
java.lang.Object |
newInstance(java.lang.Object parent)
Creates a new instance of the object described by this field. |
void |
resetValue(java.lang.Object object)
Sets the value of the field to a default value. |
void |
setValue(java.lang.Object object,
java.lang.Object value)
Sets the value of the field on the object. |
Method Detail |
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java.lang.Object getValue(java.lang.Object object) throws java.lang.IllegalStateException
object
- The object
java.lang.IllegalStateException
- The Java object has changed and
is no longer supported by this handler, or the handler is not
compatiable with the Java objectvoid setValue(java.lang.Object object, java.lang.Object value) throws java.lang.IllegalStateException, java.lang.IllegalArgumentException
object
- The objectvalue
- The new value
java.lang.IllegalStateException
- The Java object has changed and
is no longer supported by this handler, or the handler is not
compatiable with the Java object
java.lang.IllegalArgumentException
void resetValue(java.lang.Object object) throws java.lang.IllegalStateException, java.lang.IllegalArgumentException
Reference fields are set to null, primitive fields are set to their default value, collection fields are emptied of all elements.
object
- The object
java.lang.IllegalStateException
- The Java object has changed and
is no longer supported by this handler, or the handler is not
compatiable with the Java object
java.lang.IllegalArgumentException
void checkValidity(java.lang.Object object) throws ValidityException, java.lang.IllegalStateException
ValidityException
java.lang.IllegalStateException
java.lang.Object newInstance(java.lang.Object parent) throws java.lang.IllegalStateException
parent
- The object for which the field is created
java.lang.IllegalStateException
- This field is a simple type and
cannot be instantiated
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