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Oracle® Coherence Java API Reference Release 3.7.1.0 E22843-01 |
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java.lang.Object
com.tangosol.util.Base
com.tangosol.util.processor.AbstractProcessor
com.tangosol.util.processor.ConditionalProcessor
public class ConditionalProcessor
Conditional entry processor represents a processor that is invoked conditionally based on the result of an entry evaluation.
If the underlying filter expects to evaluate existent entries only (i.e. entries for which isPresent()
is true), it should be combined with a PresentFilter
as follows:
Filter filterPresent = new AndFilter(PresentFilter.INSTANCE, filter);
PresentFilter
Field Summary | |
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protected Filter |
m_filter The underlying filter. |
protected InvocableMap.EntryProcessor |
m_processor The underlying entry processor. |
Constructor Summary | |
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ConditionalProcessor() Default constructor (necessary for the ExternalizableLite interface). |
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ConditionalProcessor(Filter filter, InvocableMap.EntryProcessor processor) Construct a ConditionalProcessor for the specified filter and the processor. |
Method Summary | |
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boolean |
equals(java.lang.Object o) Compare the ConditionalProcessor with another object to determine equality. |
int |
hashCode() Determine a hash value for the ConditionalProcessor object according to the general Object.hashCode() contract. |
java.lang.Object |
process(InvocableMap.Entry entry) Process a Map.Entry object. |
java.util.Map |
processAll(java.util.Set setEntries) Process a Set of InvocableMap.Entry objects. |
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. |
java.lang.String |
toString() Return a human-readable description for this ConditionalProcessor. |
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. |
Field Detail |
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protected Filter m_filter
protected InvocableMap.EntryProcessor m_processor
Constructor Detail |
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public ConditionalProcessor()
public ConditionalProcessor(Filter filter, InvocableMap.EntryProcessor processor)
The specified entry processor gets invoked if and only if the filter applied to the InvocableMap entry evaluates to true; otherwize the result of the process(com.tangosol.util.InvocableMap.Entry)
invocation will return null.
filter
- the filterprocessor
- the entry processorMethod Detail |
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public java.lang.Object process(InvocableMap.Entry entry)
process
in interface InvocableMap.EntryProcessor
entry
- the Entry to process Note: if this method throws an exception, all modifications to the supplied entry or any other entries retrieved via the BackingMapContext.getBackingMapEntry(java.lang.Object)
API will be rolled back leaving all underlying values unchanged.public java.util.Map processAll(java.util.Set setEntries)
Map mapResults = new ListMap(); for (Iterator iter = setEntries.iterator(); iter.hasNext(); ) { Entry entry = (Entry) iter.next(); mapResults.put(entry.getKey(), process(entry)); } return mapResults;Note: if processAll() call throws an exception, only the entries that were removed from the setEntries would be considered successfully processed and the corresponding changes made to the underlying Map; changes made to the remaining entries or any other entries obtained from
BackingMapContext.getBackingMapEntry(java.lang.Object)
will not be processed.processAll
in interface InvocableMap.EntryProcessor
processAll
in class AbstractProcessor
setEntries
- a Set of InvocableMap.Entry objects to processpublic boolean equals(java.lang.Object o)
public int hashCode()
Object.hashCode()
contract.public java.lang.String toString()
public void readExternal(java.io.DataInput in) throws java.io.IOException
readExternal
in interface ExternalizableLite
in
- the DataInput stream to read data from in order to restore the state of this objectjava.io.IOException
- if an I/O exception occursjava.io.NotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized intopublic void writeExternal(java.io.DataOutput out) throws java.io.IOException
writeExternal
in interface ExternalizableLite
out
- the DataOutput stream to write the state of this object tojava.io.IOException
- if an I/O exception occurspublic void readExternal(PofReader in) throws java.io.IOException
readExternal
in interface PortableObject
in
- the PofReader from which to read the object's statejava.io.IOException
- if an I/O error occurspublic void writeExternal(PofWriter out) throws java.io.IOException
writeExternal
in interface PortableObject
out
- the PofWriter to which to write the object's statejava.io.IOException
- if an I/O error occurs
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Oracle® Coherence Java API Reference Release 3.7.1.0 E22843-01 |
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