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java.lang.Objectdk.netarkivet.harvester.datamodel.extendedfield.ExtendedFieldValueDAO
public abstract class ExtendedFieldValueDAO
Interface for creating and accessing extended fields in persistent storage.
Field Summary | |
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protected static ExtendedFieldValueDAO |
instance
The one and only instance of this DAO. |
Constructor Summary | |
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protected |
ExtendedFieldValueDAO()
constructor used when creating singleton. |
Method Summary | |
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abstract void |
create(ExtendedFieldValue aExtendedFieldValue)
Create a ExtendedFieldValue in persistent storage. |
abstract void |
delete(long aExtendedfieldValueID)
Delete a ExtendedFieldValue in persistent storage. |
abstract boolean |
exists(java.lang.Long aExtendedFieldValueID)
Find out if there exists in persistent storage a ExtendedFieldValue with the given id. |
static ExtendedFieldValueDAO |
getInstance()
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abstract ExtendedFieldValue |
read(java.lang.Long aExtendedFieldID,
java.lang.Long aInstanceID)
Read the ExtendedFieldValue with the given extendedFieldID. |
static void |
reset()
Reset the DAO instance. |
abstract void |
update(ExtendedFieldValue aExtendedFieldValue)
Update a ExtendedFieldValue in persistent storage. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static ExtendedFieldValueDAO instance
Constructor Detail |
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protected ExtendedFieldValueDAO()
Method Detail |
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public static void reset()
public abstract boolean exists(java.lang.Long aExtendedFieldValueID)
aExtendedFieldValueID
- An id associated with a ExtendedFieldValue
public abstract void create(ExtendedFieldValue aExtendedFieldValue)
aExtendedFieldValue
- The ExtendedFieldValue to create in
persistent storage.public abstract ExtendedFieldValue read(java.lang.Long aExtendedFieldID, java.lang.Long aInstanceID)
aExtendedFieldID
- A given ID for a ExtendedFieldValueaInstanceID
- A given instanceID
public abstract void update(ExtendedFieldValue aExtendedFieldValue)
aExtendedFieldValue
- The ExtendedFieldValue to updatepublic abstract void delete(long aExtendedfieldValueID)
aExtendedfieldValueID
- The ID for a extendedFieldValue to deletepublic static ExtendedFieldValueDAO getInstance()
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