org.mule.api.expression (Mule ESB 2.2.1 API)
Keywords: org.mule.api.expression package

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## Package org.mule.api.expression

Interface Summary
ExpressionEvaluator | `ExpressionEvaluator` extracts a property from the message in a generic way.
ExpressionManager | Provides universal access for evaluating expressions embedded in Mule configurations, such as Xml, Java, scripting and annotations.

Exception Summary
ExpressionRuntimeException | If thrown by the `DefaultExpressionManager` if an expression returns null and failIfNull was set when `ExpressionManager.evaluate(String,org.mule.api.MuleMessage,boolean)` was called.
RequiredValueException | Is thrown explicitly when an expression is executed that returns a null value when a value is required.

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