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Oracle® Coherence Java API Reference Release 3.6.0.0 E15725-01 |
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java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.filter.AlwaysFilter
public class AlwaysFilter
Filter which always evaluates to true.
Field Summary | |
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static AlwaysFilter |
INSTANCE An instance of the AlwaysFilter. |
Constructor Summary | |
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AlwaysFilter() Construct an AlwaysFilter. |
Method Summary | |
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Filter |
applyIndex(Map mapIndexes, Set setKeys) Filter remaining keys using a Map of available indexes. |
int |
calculateEffectiveness(Map mapIndexes, Set setKeys) Given a Map of available indexes, determine if this IndexAwareFilter can use any of the indexes to assist in its processing, and if so, determine how effective the use of that index would be. |
boolean |
equals(Object o) Compare the AlwaysFilter with another object to determine equality. |
boolean |
evaluate(Object o) Apply the test to the object. |
boolean |
evaluateEntry(Map.Entry entry) Apply the test to a Map Entry. |
int |
hashCode() Determine a hash value for the AlwaysFilter 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. |
void |
readExternal(PofReader in) Restore the contents of a user type instance by reading its state using the specified PofReader object. |
String |
toString() Return a human-readable description for this Filter. |
void |
writeExternal(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 |
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countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString |
Field Detail |
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public static final AlwaysFilter INSTANCE
Constructor Detail |
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public AlwaysFilter()
Method Detail |
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public boolean evaluate(Object o)
evaluate
in interface Filter
o
- the object to testpublic boolean evaluateEntry(Map.Entry entry)
evaluateEntry
in interface EntryFilter
entry
- the Map Entry to evaluate; never nullpublic int calculateEffectiveness(Map mapIndexes, Set setKeys)
calculateEffectiveness
in interface IndexAwareFilter
mapIndexes
- the available MapIndex
objects keyed by the related ValueExtractor; read-onlysetKeys
- the set of keys that will be filtered; read-onlypublic Filter applyIndex(Map mapIndexes, Set setKeys)
EntryFilter
) that can complete the task using an iterating implementation. If, on the other hand, the filter does fully evaluate the remaining keys using just the index information, then it should return null to indicate that no further filtering is necessary.applyIndex
in interface IndexAwareFilter
mapIndexes
- the available MapIndex
objects keyed by the related ValueExtractor; read-onlysetKeys
- the mutable set of keys that remain to be filteredFilter
object (which may be an EntryFilter
) that can be used to process the remaining keys, or null if no additional filter processing is necessarypublic boolean equals(Object o)
public int hashCode()
Object.hashCode()
contract.public String toString()
public void readExternal(DataInput in) throws IOException
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
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
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
writeExternal
in interface PortableObject
out
- the PofWriter to which to write the object's stateIOException
- if an I/O error occurs
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Oracle® Coherence Java API Reference Release 3.6.0.0 E15725-01 |
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