groupbasedpolicy/src/main/java/org/opendaylight/groupbasedpolicy/resolver/validator/PolicyValidator.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.resolver.validator;
  10
  11 import java.util.HashMap;
  12 import java.util.Map;
  13 import javax.annotation.Nullable;
  14 import org.opendaylight.groupbasedpolicy.resolver.PolicyResolver;
  15 import org.opendaylight.groupbasedpolicy.resolver.validator.validators.ActionInstanceValidator;
  16 import org.opendaylight.groupbasedpolicy.resolver.validator.validators.SubjectFeatureInstancesValidator;
  17 import org.opendaylight.groupbasedpolicy.resolver.validator.validators.TenantValidator;
  18 import org.opendaylight.yangtools.yang.binding.DataContainer;
  19
  20 /**
  21  *
  22  * Factory to create concrete {@link Validator} class for object to validate.
  23  *
  24  */
  25 public class PolicyValidator {
  26
  27     /**
  28      * Map of Objects and their corresponding validators.
  29      */
  30     private static final Map<Class<? extends DataContainer>, AbstractValidator<? extends DataContainer>> VALIDATORS;
  31
  32     static {
  33         VALIDATORS = new HashMap<>();
  34         TenantValidator tenantValidator = new TenantValidator();
  35         VALIDATORS.put(tenantValidator.getType(), tenantValidator);
  36         SubjectFeatureInstancesValidator subjectFeatureInstancesValidator = new SubjectFeatureInstancesValidator();
  37         VALIDATORS.put(subjectFeatureInstancesValidator.getType(), subjectFeatureInstancesValidator);
  38         ActionInstanceValidator actionInstanceValidator = new ActionInstanceValidator();
  39         VALIDATORS.put(actionInstanceValidator.getType(), actionInstanceValidator);
  40     }
  41
  42     /**
  43      * Validator Returns {@link Validator} for given object.
  44      *
  45      * @param <T>
  46      * @param object Object, for which validator should be created.
  47      * @param policyResolver Instance of {@link PolicyResolver} that contains
  48      * additional data required for individual validation process
  49      * @return Concrete {@link Validator} for given object
  50      */
  51     @SuppressWarnings({"unchecked", "rawtypes"})
  52     static <T extends DataContainer> Validator<T> createValidator(T object, PolicyResolver policyResolver) {
  53         AbstractValidator validator = VALIDATORS.get(object.getImplementedInterface());
  54         if (validator == null) {
  55             return null;
  56         }
  57         validator.setPolicyResolver(policyResolver);
  58         return (Validator<T>) validator;
  59     }
  60
  61     /**
  62      * @param <T>
  63      * @param object Object to validate
  64      * @param policyResolver Instance of {@link PolicyResolver} that contains
  65      * additional data required for individual validation process
  66      * @return {@code null} if validator for the object does not exist;
  67      * {@link ValidationResult} otherwise
  68      */
  69     public static @Nullable
  70     <T extends DataContainer> ValidationResult validate(T object, PolicyResolver policyResolver) {
  71         Validator<T> validator = createValidator(object, policyResolver);
  72         return validator.validate(object);
  73     }
  74
  75 }