Class FormatableInstanceGetter
java.lang.Object
org.apache.derby.iapi.services.io.FormatableInstanceGetter
- All Implemented Interfaces:
InstanceGetter
- Direct Known Subclasses:
BasicUUIDGetter
,CoreDDFinderClassInfo
,DepClassInfo
,DTSClassInfo
,HeapClassInfo
,TypesImplInstanceGetter
Class that loads Formattables (typically from disk)through
one level of indirection.
A concrete implementation of this class is registered as the
class to handle a number of format identifiers in RegisteredFormatIds.
When the in-memory representation of RegisteredFormatIds is set up
an instance of the concrete class will be created for each format
identifier the class is registered for, and each instances will
have its setFormatId() called once with the appropriate format identifier.
When a Formattable object is read from disk and its registered class is an instance of FormatableInstanceGetter the getNewInstance() method will be called to create the object. The implementation can use the fmtId field to determine the class of the instance to be returned.
Instances of FormatableInstanceGetter are system wide, that is there is a single set of RegisteredFormatIds per system.
When a Formattable object is read from disk and its registered class is an instance of FormatableInstanceGetter the getNewInstance() method will be called to create the object. The implementation can use the fmtId field to determine the class of the instance to be returned.
Instances of FormatableInstanceGetter are system wide, that is there is a single set of RegisteredFormatIds per system.
- See Also:
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionfinal void
setFormatId
(int fmtId) Set the format identifier that this instance will be loading from disk.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.apache.derby.iapi.services.loader.InstanceGetter
getNewInstance
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Field Details
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fmtId
protected int fmtIdFormat identifier of the object
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Constructor Details
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FormatableInstanceGetter
public FormatableInstanceGetter()
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Method Details
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setFormatId
public final void setFormatId(int fmtId) Set the format identifier that this instance will be loading from disk.
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