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package org.glassfish.jersey.tests.cdi.bv;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.validation.ConstraintViolationException;
import javax.validation.ValidationException;
import org.glassfish.jersey.server.spi.ValidationInterceptor;
import org.glassfish.jersey.server.spi.ValidationInterceptorContext;
import org.jboss.weld.interceptor.util.proxy.TargetInstanceProxy;
/**
* CDI backed interceptor to handle validation issues.
*
* @author Jaku Podlesak (jakub.podlesak at oracle.com)
*/
@ApplicationScoped
public class CdiValidationInterceptor implements ValidationInterceptor {
private final CdiValidationResult validationResult;
private final CdiPropertyInjectedResource pir;
/**
* Empty constructor to make CDI happy.
*/
@SuppressWarnings("UnusedDeclaration")
public CdiValidationInterceptor() {
this.validationResult = null;
this.pir = null;
}
/**
* Injection constructor.
*
* @param validationResult CDI implementation of validation result.
* @param resource CDI property-injected JAX-RS resource.
*/
@Inject
public CdiValidationInterceptor(CdiValidationResult validationResult, CdiPropertyInjectedResource resource) {
this.validationResult = validationResult;
this.pir = resource;
}
@Override
public void onValidate(ValidationInterceptorContext ctx) throws ValidationException {
final Object resource = ctx.getResource();
if (resource instanceof TargetInstanceProxy) {
ctx.setResource(((TargetInstanceProxy) resource).getTargetInstance());
}
try {
ctx.proceed();
} catch (ConstraintViolationException constraintViolationException) {
// First check for a property
if (ValidationResultUtil.hasValidationResultProperty(resource)) {
final Method validationResultGetter = ValidationResultUtil.getValidationResultGetter(resource);
ValidationResultUtil.updateValidationResultProperty(resource, validationResultGetter,
constraintViolationException.getConstraintViolations());
pir.setValidationResult(validationResult);
} else {
// Then check for a field
final Field vr = ValidationResultUtil.getValidationResultField(resource);
if (vr != null) {
// we have the right guy, no need to use reflection:
validationResult.setViolations(constraintViolationException.getConstraintViolations());
} else {
if (isValidationResultInArgs(ctx.getArgs())) {
this.validationResult.setViolations(constraintViolationException.getConstraintViolations());
} else {
throw constraintViolationException;
}
}
}
}
}
private boolean isValidationResultInArgs(Object[] args) {
for (Object a : args) {
if (a != null) {
Class<?> argClass = a.getClass();
do {
if (ValidationResult.class.isAssignableFrom(argClass)) {
return true;
}
argClass = argClass.getSuperclass();
} while (argClass != Object.class);
}
}
return false;
}
}