ValueComparisonRule

Validation rule that compares a value to a constant.

Implements: IValidationRule

Description

The ValueComparisonRule class allows you to create a validation rule that compares a value to a constant.

Constructors

Creates a new validation rule and sets its values.

public ValueComparisonRule(String operation, Object value)

operation: String - comparison operation: "==" ("=", “EQ”), “!= " ("<>”, “NE”); “<"/">” (“LT”/“GT”), “<="/">=” (“LE”/“GE”); “LIKE”.
value: Object - constant value to compare to

Instance methods

validate

Validates a given value against this rule.

public void validate(String path, Schema schema, Object value, List<ValidationResult> results)

path: String - dot notation path to the value.
schema: Schema - schema this rule is called from
value: Object - value to be validated.
results: List<ValidationResult> - list with validation results to add new results.

Examples

{@code
  Schema schema = new Schema()
       .withRule(new ValueComparisonRule("EQ", 1));
 
  schema.validate(1);          // Result: no errors
  schema.validate(2);          // Result: 2 is not equal to 1
  }

See also

IValidationRule