Package org.apache.juneau.svl.vars

Class CoalesceVar

java.lang.Object

org.apache.juneau.svl.Var

org.apache.juneau.svl.SimpleVar

org.apache.juneau.svl.MultipartResolvingVar

org.apache.juneau.svl.vars.CoalesceVar

public class CoalesceVar
extends MultipartResolvingVar

A basic variable resolver that returns the first non-null value.

The format for this var is "$CO{arg1[,arg2...]}".

See Also:

• Simple Variable Language

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME	The name of this variable.

Constructor Summary

Constructors

Constructor	Description
CoalesceVar()	Constructor.

Method Summary

Modifier and Type	Method	Description
String	resolve(VarResolverSession session, String arg)	The interface that needs to be implemented for subclasses of SimpleVar.

Methods inherited from class org.apache.juneau.svl.MultipartResolvingVar

doResolve

Methods inherited from class org.apache.juneau.svl.SimpleVar

resolveTo

Methods inherited from class org.apache.juneau.svl.Var

allowNested, allowRecurse, canResolve, getName

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final String NAME

The name of this variable.

See Also:

• Constant Field Values

Constructor Details

CoalesceVar

public CoalesceVar()

Constructor.

Method Details

resolve

public String resolve(VarResolverSession session,
 String arg)
               throws Exception

Description copied from class: Var

The interface that needs to be implemented for subclasses of SimpleVar.

Specified by:

resolve in class Var

Parameters:

session - The session object used for a single instance of a var resolution.

arg - The inside argument of the variable.

Returns:

The resolved value.

Throws:

Exception - Any exception can be thrown.