Package com.tangosol.config.expression

Class NullParameterResolver

java.lang.Object
com.tangosol.config.expression.NullParameterResolver
All Implemented Interfaces:
ParameterResolver, ExternalizableLite, PortableObject, Serializable
public class NullParameterResolver extends Object implements ParameterResolver, ExternalizableLite, PortableObject
A NullParameterResolver is a ParameterResolver that always resolves named Parameters to null.

IMPORTANT: Developers should only use this class when they can't easily access the ParameterResolver provided by the CacheConfig getDefaultParameterResolver() method.

In most circumstances this class is only ever used for: a). testing and/or b) those very rare occasions that you need a ParameterResolver and want all parameters resolved to null.

NOTE: This class does not provide a static INSTANCE declaration by design. Developers are not meant to use this class very often and hence we discourage this by not providing an INSTANCE declaration.

Since:
Coherence 12.1.2
Author:
bo 2011.09.27
See Also:

  • Constructor Details

    • NullParameterResolver

      public NullParameterResolver()
      Default constructor needed for serialization.

  • Method Details

    • resolve

      public Parameter resolve(String sName)
      Obtains the specified named Parameter.
      Specified by:
      resolve in interface ParameterResolver
      Parameters:
      sName - the name of the Parameter
      Returns:
      the Parameter or null if the Parameter can't be resolved

    • readExternal

      public void readExternal(DataInput in) throws 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:
      IOException - if an I/O exception occurs

    • writeExternal

      public void writeExternal(DataOutput out) throws 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:
      IOException - if an I/O exception occurs

    • readExternal

      public void readExternal(PofReader reader) throws 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:
      reader - the PofReader from which to read the object's state
      Throws:
      IOException - if an I/O error occurs

    • writeExternal

      public void writeExternal(PofWriter writer) throws 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:
      writer - the PofWriter to which to write the object's state
      Throws:
      IOException - if an I/O error occurs