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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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java.lang.Objectcom.tangosol.util.Base
com.tangosol.util.processor.AbstractProcessor
com.tangosol.util.processor.PropertyProcessor
public abstract class PropertyProcessor
PropertyProcessor is a base class for EntryProcessor implementations that depend on a PropertyManipulator.
Any concrete subclass would have to implement the methods ofExternalizableLite
interface calling the appropriate super class
implementations first.
A typical concrete subclass would also implement the process()
method using the following pattern:
public Object process(InvocableMap.Entry entry) { // retrieve an old property value Object oOldValue = get(entry); ... // calculate a new value and the process result ... // based on the old value and the processor's attributes if (!oNewValue.equals(oOldValue)) { // set the new property value set(entry, oNewValue); } // return the process result return oResult; }
Field Summary | |
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protected ValueManipulator |
m_manipulator
The property value manipulator. |
Constructor Summary | |
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PropertyProcessor()
Default constructor (necessary for the ExternalizableLite interface). |
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PropertyProcessor(PropertyManipulator manipulator)
Construct a PropertyProcessor based for the specified PropertyManipulator. |
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PropertyProcessor(String sName)
Construct a PropertyProcessor for the specified property name. |
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PropertyProcessor(String sName,
boolean fUseIs)
Construct a PropertyProcessor for the specified property name. |
Method Summary | |
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boolean |
equals(Object o)
Compare the PropertyProcessor with another object to determine equality. |
protected Object |
get(InvocableMap.Entry entry)
Get the property value from the passed Entry object. |
protected abstract String |
getDescription()
Returns this PropertyProcessor's description. |
int |
hashCode()
Determine a hash value for the PropertyProcessor 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. |
protected void |
set(InvocableMap.Entry entry,
Object oValue)
Set the property value into the passed Entry object. |
String |
toString()
Return a human-readable description for this PropertyProcessor. |
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.processor.AbstractProcessor |
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processAll |
Methods inherited from interface com.tangosol.util.InvocableMap.EntryProcessor |
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process |
Field Detail |
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protected ValueManipulator m_manipulator
Constructor Detail |
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public PropertyProcessor()
public PropertyProcessor(String sName)
This constructor assumes that the corresponding property getter will have a name of ("get" + sName) and the corresponding property setter's name will be ("set + sName).
sName
- a property namepublic PropertyProcessor(String sName, boolean fUseIs)
This constructor assumes that the corresponding property getter will have a name of either ("get" + sName) or ("is + sName) and the corresponding property setter's name will be ("set + sName).
sName
- a property namefUseIs
- if true, the getter method will be prefixed with "is"
rather than "get"public PropertyProcessor(PropertyManipulator manipulator)
manipulator
- a PropertyManipulator; could be nullMethod Detail |
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protected Object get(InvocableMap.Entry entry)
entry
- the Entry object
ValueExtractor.extract(java.lang.Object)
protected void set(InvocableMap.Entry entry, Object oValue)
entry
- the Entry objectoValue
- a new property valueValueUpdater.update(java.lang.Object, java.lang.Object)
protected abstract String getDescription()
public 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 object
IOException
- if an I/O exception occurs
NotActiveException
- 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 to
IOException
- 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 state
IOException
- 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 state
IOException
- if an I/O error occurs
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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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