ExpressionBiPredicate

The predicate bean named shibboleth.BiConditions.Expression executes a Spring Expression Language (SpEL) expression against arbitrary inputs to produce a true/false result.

An Expression Predicate is instantiated by simply supplying a string argument that contains a SpEL expression.

Example

<bean id="MyCondition" parent="shibboleth.BiConditions.Expression"
	c:expression="#input1 + #input2 < 10" />

Reference

The following additional bean properties are available:

Name	Type	Default	Description

Name	Type	Default	Description
customObject	Bean/Reference		An object to make available to the script via a variable named `custom`
inputTypes	Pair<Class<?>,Class<?>>		Allows type checking of inputs
returnOnError	boolean	false	What to return if the expression fails

The expression context will have the following variables populated:

input1 - the first input
input2 - the second input
custom - the object set via the customObject property, if any