com.tangosol.config.expression.NullParameterResolver Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.config.expression;
import com.tangosol.io.ExternalizableLite;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
/**
* A {@link NullParameterResolver} is a {@link ParameterResolver} that always
* resolves named {@link Parameter}s to null.
*
* IMPORTANT: Developers should only use this class when they
* can't easily access the {@link 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
* {@link 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.
*
*
* @author bo 2011.09.27
* @since Coherence 12.1.2
*/
public class NullParameterResolver
implements ParameterResolver, ExternalizableLite, PortableObject
{
/**
* Default constructor needed for serialization.
*/
public NullParameterResolver()
{
}
/**
* {@inheritDoc}
*/
@Override
public Parameter resolve(String sName)
{
return null;
}
// ----- ExternalizableLite interface -----------------------------------
/**
* {@inheritDoc}
*/
@Override
public void readExternal(DataInput in) throws IOException
{
}
/**
* {@inheritDoc}
*/
@Override
public void writeExternal(DataOutput out) throws IOException
{
}
// ----- PortableObject interface ---------------------------------------
/**
* {@inheritDoc}
*/
@Override
public void readExternal(PofReader reader) throws IOException
{
}
/**
* {@inheritDoc}
*/
@Override
public void writeExternal(PofWriter writer) throws IOException
{
}
}