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public interface AttributeConverter
Maps EDataType
instances to CDO data type IDs
and transfers attribute values between EObject
and Channel
instances.
An AttributeConverter
may apply any sort of data type conversion to
optimize the payload traffic through the Channel
, as long as the
corresponding AttributeConverter
at server side is able to handle
the specific data format.
Note: An AttributeConverter
service is needed both at server
and at client side (different interfaces). Their interpretations of the data type
formats have to be identical under all circumstances! Otherwise unpredictable
behaviour will occur, in the best case resulting in an
OutOfSequenceException
being thrown and always rendering the
affected Channel
unusable. Other channels of the same
Connector
are not affected.
CDODataTypes
Field Summary |
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Fields inherited from interface org.eclipse.emf.cdo.core.CDODataTypes |
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BOOLEAN, BOOLEAN_OBJECT, BYTE, BYTE_OBJECT, CHAR, CHAR_OBJECT, DOUBLE, DOUBLE_OBJECT, FLOAT, FLOAT_OBJECT, INT, INT_OBJECT, LONG, LONG_OBJECT, MAX_PRIMITIVE, MIN_PRIMITIVE, SHORT, SHORT_OBJECT, STRING, USER_DEFINED |
Method Summary | |
---|---|
void |
fromChannel(org.eclipse.emf.ecore.EObject object,
org.eclipse.emf.ecore.EAttribute attribute,
org.eclipse.net4j.core.Channel channel)
Reads a value from a Channel and writes it to the given
object attribute. |
int |
getCDODataType(org.eclipse.emf.ecore.EDataType eDataType)
Returns the CDO data type ID (as specified in CDODataTypes ) for the given EDataType
instance. |
void |
toChannel(org.eclipse.emf.ecore.EObject object,
org.eclipse.emf.ecore.EAttribute attribute,
org.eclipse.net4j.core.Channel channel)
Reads a value from an object attribute and writes it to the given Channel . |
Methods inherited from interface org.eclipse.net4j.spring.Service |
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addStateListener, dump, getState, isActive, isAutoStart, isStarted, removeStateListener, start, stop, testSetState |
Methods inherited from interface org.eclipse.net4j.spring.Loggable |
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debug, debug, error, error, fatal, fatal, getBeanName, getChild, getContainer, getFullBeanName, getLogger, info, info, isDebugEnabled, isErrorEnabled, isFatalEnabled, isInfoEnabled, isWarnEnabled, warn, warn |
Method Detail |
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void fromChannel(org.eclipse.emf.ecore.EObject object, org.eclipse.emf.ecore.EAttribute attribute, org.eclipse.net4j.core.Channel channel)
Channel
and writes it to the given
object attribute.
object
- The object to store value in.attribute
- The attribute to store the value in.channel
- The channel to read the value from.void toChannel(org.eclipse.emf.ecore.EObject object, org.eclipse.emf.ecore.EAttribute attribute, org.eclipse.net4j.core.Channel channel)
Channel
.
object
- The object to read the value from.attribute
- The attribute to read the value from.channel
- The channel to write the value to.int getCDODataType(org.eclipse.emf.ecore.EDataType eDataType)
CDODataTypes
) for the given EDataType
instance.
eDataType
- The EMF data type instance to map to the CDO type system.
|
Copyright (c) 2004, 2005, 2006 Eike Stepper, Germany. All Rights Reserved. |
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