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

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