package com.sishuok.spring4.validator;
import org.hibernate.validator.internal.util.Contracts;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
import org.hibernate.validator.internal.util.scriptengine.ScriptEvaluator;
import org.hibernate.validator.internal.util.scriptengine.ScriptEvaluatorFactory;
import org.springframework.util.StringUtils;
import javax.script.ScriptException;
import javax.validation.ConstraintDeclarationException;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import static org.hibernate.validator.internal.util.logging.Messages.MESSAGES;
/**
* <p>User: Zhang Kaitao
* <p>Date: 13-12-15
* <p>Version: 1.0
*/
public class CrossParameterScriptAssertClassValidator implements ConstraintValidator<CrossParameterScriptAssert, Object> {
private static final Log log = LoggerFactory.make();
private String script;
private String languageName;
private String alias;
private String property;
private String message;
public void initialize(CrossParameterScriptAssert constraintAnnotation) {
validateParameters( constraintAnnotation );
this.script = constraintAnnotation.script();
this.languageName = constraintAnnotation.lang();
this.alias = constraintAnnotation.alias();
this.property = constraintAnnotation.property();
this.message = constraintAnnotation.message();
}
public boolean isValid(Object value, ConstraintValidatorContext constraintValidatorContext) {
Object evaluationResult;
ScriptEvaluator scriptEvaluator;
try {
ScriptEvaluatorFactory evaluatorFactory = ScriptEvaluatorFactory.getInstance();
scriptEvaluator = evaluatorFactory.getScriptEvaluatorByLanguageName( languageName );
}
catch ( ScriptException e ) {
throw new ConstraintDeclarationException( e );
}
try {
evaluationResult = scriptEvaluator.evaluate( script, value, alias );
}
catch ( ScriptException e ) {
throw log.getErrorDuringScriptExecutionException( script, e );
}
if ( evaluationResult == null ) {
throw log.getScriptMustReturnTrueOrFalseException( script );
}
if ( !( evaluationResult instanceof Boolean ) ) {
throw log.getScriptMustReturnTrueOrFalseException(
script,
evaluationResult,
evaluationResult.getClass().getCanonicalName()
);
}
if(Boolean.FALSE.equals(evaluationResult) && StringUtils.hasLength(property)) {
constraintValidatorContext.disableDefaultConstraintViolation();
constraintValidatorContext
.buildConstraintViolationWithTemplate(message)
.addPropertyNode(property)
.addConstraintViolation();
}
return Boolean.TRUE.equals( evaluationResult );
}
private void validateParameters(CrossParameterScriptAssert constraintAnnotation) {
Contracts.assertNotEmpty(constraintAnnotation.script(), MESSAGES.parameterMustNotBeEmpty("script"));
Contracts.assertNotEmpty( constraintAnnotation.lang(), MESSAGES.parameterMustNotBeEmpty( "lang" ) );
Contracts.assertNotEmpty( constraintAnnotation.alias(), MESSAGES.parameterMustNotBeEmpty( "alias" ) );
Contracts.assertNotEmpty( constraintAnnotation.message(), MESSAGES.parameterMustNotBeEmpty( "message" ) );
}
}