Package com.tangosol.config.expression

Class SystemPropertyParameterResolver

java.lang.Object

com.tangosol.config.expression.SystemPropertyParameterResolver

All Implemented Interfaces:

ParameterResolver

public class SystemPropertyParameterResolver
extends Object
implements ParameterResolver

A SystemPropertyParameterResolver is a ParameterResolver that is based on property methods on System.

Replaces {@link com.tangosol.config.expression.PropertiesParameterResolver(java.util.Map)} since it required read and write access for all Properties for simple property access. resolve(String) only requires read access for property specified.

Since:

Coherence 12.2.1

Author:

jf 2015.04.15

Field Summary

Fields

Modifier and Type	Field	Description
static SystemPropertyParameterResolver	INSTANCE	This singleton instance of the SystemPropertyParameterResolver.

Constructor Summary

Constructors

Constructor	Description
SystemPropertyParameterResolver()

Method Summary

Modifier and Type	Method	Description
Parameter	resolve(String sName)	Resolve Coherence system property sName
<T> T	resolve(String sName, Class<T> clzTypeValue)	Return property's value as requested type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final SystemPropertyParameterResolver INSTANCE

This singleton instance of the SystemPropertyParameterResolver.

Constructor Detail

SystemPropertyParameterResolver

public SystemPropertyParameterResolver()

Method Detail

resolve

public Parameter resolve(String sName)

Resolve Coherence system property sName

Specified by:

resolve in interface ParameterResolver

Parameters:

sName - system property name

Returns:

a Parameter representing the value of sName or null if system property not found or if SecurityException was handled.

resolve

public <T> T resolve(String sName,
                     Class<T> clzTypeValue)

Return property's value as requested type.

Type Parameters:

T - property value's target type

Parameters:

sName - property name

clzTypeValue - coerce system property's value from string to instance of this class

Returns:

null if property has no value or return property's value coerced from string to requested type. Throws exceptions listed in Value.as(Class) when coercion fails.