com.opensymphony.xwork2.validator.validators: public class: ExpressionValidator

com.opensymphony.xwork2.validator.validators
public class: ExpressionValidator [javadoc | source]

java.lang.Object
   com.opensymphony.xwork2.validator.validators.ValidatorSupport
      com.opensymphony.xwork2.validator.validators.ExpressionValidator

All Implemented Interfaces:
ShortCircuitableValidator, Validator

A Non-Field Level validator that validates based on regular expression supplied.

expression - the Ognl expression to be evaluated against the stack (Must evaluate to a Boolean)


<validators>
<validator type="expression">
<param name="expression"> .... </param>
<message>Failed to meet Ognl Expression .... </message>
</validator>
</validators>

author: Jason - Carreira

Fields inherited from com.opensymphony.xwork2.validator.validators.ValidatorSupport:
log, defaultMessage, messageKey

Method from com.opensymphony.xwork2.validator.validators.ExpressionValidator Summary:
getExpression, setExpression, validate

Methods from com.opensymphony.xwork2.validator.validators.ValidatorSupport:
addActionError, addFieldError, conditionalParse, getDefaultMessage, getFieldValue, getMessage, getMessageKey, getParse, getValidatorContext, getValidatorType, isShortCircuit, setDefaultMessage, setMessageKey, setParse, setShortCircuit, setValidatorContext, setValidatorType, setValueStack

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from com.opensymphony.xwork2.validator.validators.ExpressionValidator Detail:
public String getExpression() { return expression; }
public void setExpression(String expression) { this.expression = expression; }
public void validate(Object object) throws ValidationException { Boolean answer = Boolean.FALSE; Object obj = null; try { obj = getFieldValue(expression, object); } catch (ValidationException e) { throw e; } catch (Exception e) { // let this pass, but it will be logged right below } if ((obj != null) && (obj instanceof Boolean)) { answer = (Boolean) obj; } else { log.warn("Got result of " + obj + " when trying to get Boolean."); } if (!answer.booleanValue()) { if (log.isDebugEnabled()) log.debug("Validation failed on expression " + expression + " with validated object "+ object); addActionError(object); } }

Method from com.opensymphony.xwork2.validator.validators.ExpressionValidator Detail:

 public String getExpression() {
        return expression;
}

 public  void setExpression(String expression) {
        this.expression = expression;
}

 public  void validate(Object object) throws ValidationException {
        Boolean answer = Boolean.FALSE;
        Object obj = null;
        try {
            obj = getFieldValue(expression, object);
        } catch (ValidationException e) {
            throw e;
        } catch (Exception e) {
            // let this pass, but it will be logged right below
        }
        if ((obj != null) && (obj instanceof Boolean)) {
            answer = (Boolean) obj;
        } else {
            log.warn("Got result of " + obj + " when trying to get Boolean.");
        }
        if (!answer.booleanValue()) {
            if (log.isDebugEnabled()) log.debug("Validation failed on expression " + expression + " with validated object "+ object);
            addActionError(object);
        }
}