CrossParameterValidator.java

package com.sishuok.spring4.validator;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraintvalidation.SupportedValidationTarget;
import javax.validation.constraintvalidation.ValidationTarget;
import java.util.Arrays;

/**
 * <p>User: Zhang Kaitao
 * <p>Date: 13-12-15
 * <p>Version: 1.0
 */
@SupportedValidationTarget(ValidationTarget.PARAMETERS)
public class CrossParameterValidator implements ConstraintValidator<CrossParameter, Object[]> {

    @Override
    public void initialize(CrossParameter constraintAnnotation) {
    }

    @Override
    public boolean isValid(Object[] value, ConstraintValidatorContext context) {
        if(value == null || value.length != 2) {
            throw new IllegalArgumentException("must have two args");
        }
        if(value[0] == null || value[1] == null) {
            return true;
        }
        if(value[0].equals(value[1])) {
            return true;
        }
        return false;
    }
}