Package org.exolab.castor.xml
Class XMLFieldHandler
- java.lang.Object
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- org.exolab.castor.mapping.loader.FieldHandlerFriend
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- org.exolab.castor.mapping.ExtendedFieldHandler
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- org.exolab.castor.mapping.AbstractFieldHandler
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- org.exolab.castor.xml.XMLFieldHandler
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- All Implemented Interfaces:
ConfigurableFieldHandler,FieldHandler
- Direct Known Subclasses:
CenturyDescriptor.CenturyFieldHandler,CollectionFieldHandler,DateDescriptor.DateFieldHandler,DateFieldHandler,DateTimeDescriptor.DateTimeFieldHandler,DurationDescriptor.DurationFieldHandler,GDayDescriptor.GDayFieldHandler,GMonthDayDescriptor.GMonthDayFieldHandler,GMonthDescriptor.GMonthFieldHandler,GYearDescriptor.GYearFieldHandler,GYearMonthDescriptor.GYearMonthFieldHandler,MonthDescriptor.MonthFieldHandler,RecurringDurationDescriptor.RecurringDurationFieldHandler,TimeDescriptor.TimeFieldHandler,TimeDurationDescriptor.TimeDurationFieldHandler,TimePeriodDescriptor.TimePeriodFieldHandler,YearDescriptor.YearFieldHandler
public class XMLFieldHandler extends AbstractFieldHandler
This FieldHandler is used in the generated descriptors.A field handler knows how to perform various operations on the field that require access to the field value.
- Version:
- $Revision: 6216 $ $Date: 2006-04-14 04:14:43 -0600 (Fri, 14 Apr 2006) $
- Author:
- Assaf Arkin, Keith Visco
- See Also:
FieldDescriptor
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Field Summary
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Fields inherited from class org.exolab.castor.mapping.AbstractFieldHandler
_properties
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Constructor Summary
Constructors Constructor Description XMLFieldHandler()Creates a new default XMLFieldHandler
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanequals(java.lang.Object obj)Returns true if the given object is an XMLFieldHandler that is equivalent to this one.java.lang.ObjectgetValue(java.lang.Object object)Returns the value of the field from the object.java.lang.ObjectnewInstance(java.lang.Object parent)Creates a new instance of the object described by this field.java.lang.ObjectnewInstance(java.lang.Object parent, java.lang.Object[] args)Creates a new instance of the object described by this field.voidresetValue(java.lang.Object object)Sets the value of the field to a default value.voidsetValue(java.lang.Object object, java.lang.Object value)Sets the value of the field on the object.-
Methods inherited from class org.exolab.castor.mapping.AbstractFieldHandler
getFieldDescriptor, hasValue, setConfiguration, setFieldDescriptor
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Methods inherited from class org.exolab.castor.mapping.ExtendedFieldHandler
checkValidity
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Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.exolab.castor.mapping.FieldHandler
checkValidity
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Method Detail
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equals
public boolean equals(java.lang.Object obj)
Returns true if the given object is an XMLFieldHandler that is equivalent to this one. An equivalent XMLFieldHandler is an XMLFieldHandler that is an instances of the same class. This method can be overwritten to provide more advanced equivalence tests.- Overrides:
equalsin classjava.lang.Object- Returns:
- true if the given object is an XMLFieldHandler that is equivalent to this one.
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getValue
public java.lang.Object getValue(java.lang.Object object) throws java.lang.IllegalStateExceptionReturns the value of the field from the object.- Specified by:
getValuein interfaceFieldHandler- Specified by:
getValuein classFieldHandlerFriend- Parameters:
object- The object- Returns:
- The value of the field
- Throws:
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
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newInstance
public java.lang.Object newInstance(java.lang.Object parent) throws java.lang.IllegalStateExceptionCreates a new instance of the object described by this field.- Specified by:
newInstancein interfaceFieldHandler- Specified by:
newInstancein classFieldHandlerFriend- Parameters:
parent- The object for which the field is created- Returns:
- A new instance of the field's value
- Throws:
java.lang.IllegalStateException- This field is a simple type and cannot be instantiated
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newInstance
public java.lang.Object newInstance(java.lang.Object parent, java.lang.Object[] args) throws java.lang.IllegalStateExceptionCreates a new instance of the object described by this field.- Specified by:
newInstancein classExtendedFieldHandler- Parameters:
parent- The object for which the field is createdargs- the set of constructor arguments- Returns:
- A new instance of the field's value
- Throws:
java.lang.IllegalStateException- This field is a simple type and cannot be instantiated
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setValue
public void setValue(java.lang.Object object, java.lang.Object value) throws java.lang.IllegalStateException, java.lang.IllegalArgumentExceptionSets the value of the field on the object.- Specified by:
setValuein interfaceFieldHandler- Specified by:
setValuein classFieldHandlerFriend- Parameters:
object- The object.value- The new value.- Throws:
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- The value passed is not of a supported type.
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resetValue
public void resetValue(java.lang.Object object) throws java.lang.IllegalStateException, java.lang.IllegalArgumentExceptionDescription copied from class:FieldHandlerFriendSets the value of the field to a default value.Reference fields are set to null, primitive fields are set to their default value, collection fields are emptied of all elements.
- Specified by:
resetValuein interfaceFieldHandler- Specified by:
resetValuein classFieldHandlerFriend- Parameters:
object- The object- Throws:
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 objectjava.lang.IllegalArgumentException
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