net.sourceforge.stripes.validation.expression

Interface ExpressionExecutor

All Known Implementing Classes:

CommonsElExpressionExecutor, ExpressionExecutorSupport, Jsp20ExpressionExecutor, Jsp21ExpressionExecutor

public interface ExpressionExecutor

Simple interface that specifies how Stripes will invoke expression based validation. Generally used via the ExpressionValidator which will pick an appropriate implementation based on the current environment.

Implementations should throw an exception from their default constructor if they are unable to operate due to class versioning of availability issues.

Since:

Stripes 1.5

Author:

Tim Fennell

Field Summary

Fields

Modifier and Type	Field and Description
static String	ERROR_DEFAULT_SCOPE The default scope to use when constructing errors.
static String	ERROR_KEY The error key to use when constructing errors.
static String	THIS The special name given to the field that the expression is annotated on.

Method Summary

Methods

Modifier and Type	Method and Description
void	evaluate(ActionBean bean, ParameterName name, List<Object> values, ValidationMetadata validationInfo, ValidationErrors errors) Performs validation of an ActionBean property using the expression contained within the validation metadata.

Field Detail

ERROR_DEFAULT_SCOPE

static final String ERROR_DEFAULT_SCOPE

The default scope to use when constructing errors.

See Also:

Constant Field Values

ERROR_KEY

static final String ERROR_KEY

The error key to use when constructing errors.

See Also:

Constant Field Values

THIS

static final String THIS

The special name given to the field that the expression is annotated on.

See Also:

Constant Field Values

Method Detail

evaluate

void evaluate(ActionBean bean,
            ParameterName name,
            List<Object> values,
            ValidationMetadata validationInfo,
            ValidationErrors errors)

Performs validation of an ActionBean property using the expression contained within the validation metadata. If the expression does not evaluate to true then an error will be added to the validation errors. Otherwise there are no side effects.

Parameters:

bean - the ActionBean instance owning the field being validated

name - the name of the field being validated

values - the List of values (post type conversion), each to be validated

validationInfo - the validation metadata for the field

errors - the ValidationErrors object into which to place any errors