public class ValueChangeEventFilter<V,E> extends Object implements Filter<MapEvent<?,V>>, ExternalizableLite, PortableObject
Example: a filter that evaluates to true if there is an update to an Employee object that changes a value of the LastName property.
new ValueChangeEventFilter("LastName");
MapEventFilter
Modifier and Type | Field and Description |
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protected ValueExtractor<? super V,? extends E> |
m_extractor |
Constructor and Description |
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ValueChangeEventFilter()
Default constructor (necessary for the ExternalizableLite interface).
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ValueChangeEventFilter(String sMethod)
Construct a ValueChangeEventFilter that evaluates MapEvent values based on the specified method name.
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ValueChangeEventFilter(ValueExtractor<? super V,? extends E> extractor)
Construct a ValueChangeEventFilter that evaluates MapEvent values based on the specified extractor.
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Modifier and Type | Method and Description |
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boolean |
equals(Object o)
Compare the ValueChangeEventFilter with another object to determine equality.
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boolean |
evaluate(MapEvent<?,V> event)
Apply the test to the input argument.
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protected E |
extract(V target)
Extract value from a target object.
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int |
hashCode()
Determine a hash value for the ValueChangeEventFilter object according to the general
Object.hashCode() contract. |
void |
readExternal(DataInput in)
Restore the contents of this object by loading the object's state from the passed DataInput object.
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void |
readExternal(PofReader in)
Restore the contents of a user type instance by reading its state using the specified PofReader object.
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String |
toString()
Return a human-readable description for this Filter.
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void |
writeExternal(DataOutput out)
Save the contents of this object by storing the object's state into the passed DataOutput object.
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void |
writeExternal(PofWriter out)
Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait
and, asLimitFilter, associatedWith, forKeys, forPartitions, or, xor
protected ValueExtractor<? super V,? extends E> m_extractor
public ValueChangeEventFilter()
public ValueChangeEventFilter(ValueExtractor<? super V,? extends E> extractor)
extractor
- ValueExtractor to extract MapEvent valuespublic ValueChangeEventFilter(String sMethod)
sMethod
- the name of the method to invoke via reflectionprotected E extract(V target)
target
- the object to extract the value frompublic boolean equals(Object o)
public int hashCode()
Object.hashCode()
contract.public String toString()
public void readExternal(DataInput in) throws IOException
ExternalizableLite
readExternal
in interface ExternalizableLite
in
- the DataInput stream to read data from in order to restore the state of this objectIOException
- if an I/O exception occursNotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized intopublic void writeExternal(DataOutput out) throws IOException
ExternalizableLite
writeExternal
in interface ExternalizableLite
out
- the DataOutput stream to write the state of this object toIOException
- if an I/O exception occurspublic void readExternal(PofReader in) throws IOException
PortableObject
readExternal
in interface PortableObject
in
- the PofReader from which to read the object's stateIOException
- if an I/O error occurspublic void writeExternal(PofWriter out) throws IOException
PortableObject
writeExternal
in interface PortableObject
out
- the PofWriter to which to write the object's stateIOException
- if an I/O error occurs