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com.tangosol.util.extractor
Class EntryExtractor
java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.extractor.AbstractExtractor
com.tangosol.util.extractor.EntryExtractor
- All Implemented Interfaces:
- ExternalizableLite, PortableObject, QueryMapComparator, ValueExtractor, java.io.Serializable, java.util.Comparator
-
public abstract class EntryExtractor
- extends AbstractExtractor
- implements PortableObject, ExternalizableLite
The EntryExtractor is a base abstract class for special purpose custom ValueExtractor implementations. It allows them to extract a desired value using all available information on the corresponding Map.Entry object and is intended to be used in advanced custom scenarios, when application code needs to look at both key and value at the same time or can make some very specific assumptions regarding to the implementation details of the underlying Entry object. As of Coherence 3.5, the same behavior can be achieved by subclasses of the AbstractExtractor by overriding the AbstractExtractor.extractFromEntry()
.
- Since:
- Coherence 3.4
- Author:
- gg 2008.04.14
Constructor Summary |
EntryExtractor()
Default constructor (for backward compatibilty). |
EntryExtractor(int nTarget)
Construct an EntryExtractor based on the entry extraction target. |
Method Summary |
void |
readExternal(java.io.DataInput in)
Restore the contents of this object by loading the object's state from the passed DataInput object. |
void |
readExternal(PofReader in)
Restore the contents of a user type instance by reading its state using the specified PofReader object. |
void |
writeExternal(java.io.DataOutput out)
Save the contents of this object by storing the object's state into the passed DataOutput object. |
void |
writeExternal(PofWriter out)
Save the contents of a POF user type instance by writing its state using the specified PofWriter object. |
Methods inherited from class com.tangosol.util.BitHelper |
countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString |
Methods inherited from interface java.util.Comparator |
equals |
EntryExtractor
public EntryExtractor()
- Default constructor (for backward compatibilty).
EntryExtractor
public EntryExtractor(int nTarget)
- Construct an EntryExtractor based on the entry extraction target.
- Parameters:
nTarget
- one of the AbstractExtractor.VALUE
or AbstractExtractor.KEY
values
- Since:
- Coherence 3.5
readExternal
public void readExternal(java.io.DataInput in)
throws java.io.IOException
- Restore the contents of this object by loading the object's state from the passed DataInput object.
-
- Specified by:
readExternal
in interface ExternalizableLite
-
- Parameters:
in
- the DataInput stream to read data from in order to restore the state of this object
- Throws:
java.io.IOException
- if an I/O exception occurs
java.io.NotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized into
writeExternal
public void writeExternal(java.io.DataOutput out)
throws java.io.IOException
- Save the contents of this object by storing the object's state into the passed DataOutput object.
-
- Specified by:
writeExternal
in interface ExternalizableLite
-
- Parameters:
out
- the DataOutput stream to write the state of this object to
- Throws:
java.io.IOException
- if an I/O exception occurs
readExternal
public void readExternal(PofReader in)
throws java.io.IOException
- Restore the contents of a user type instance by reading its state using the specified PofReader object.
-
- Specified by:
readExternal
in interface PortableObject
-
- Parameters:
in
- the PofReader from which to read the object's state
- Throws:
java.io.IOException
- if an I/O error occurs
writeExternal
public void writeExternal(PofWriter out)
throws java.io.IOException
- Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
-
- Specified by:
writeExternal
in interface PortableObject
-
- Parameters:
out
- the PofWriter to which to write the object's state
- Throws:
java.io.IOException
- if an I/O error occurs
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