/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You under the Apache License, Version 2.0

  * (the "License"); you may not use this file except in compliance with

  * the License.  You may obtain a copy of the License at

  *

  *  http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.any23.validator;

 import java.util.Collections;

 import java.util.List;

 /**

  * An implementation of {@link ValidationReportBuilder} with no data.

  *

  * @author Davide Palmisano (palmisano@fbk.eu)

  * @author Michele Mostarda (mostarda@fbk.eu)

  */

 @XMLValidationReportSerializer.NodeName("validationReport")

 public class EmptyValidationReport implements ValidationReport {

     private static final EmptyValidationReport INSTANCE = new EmptyValidationReport();

     private static final List<Issue> EMPTY_ISSUES = Collections.emptyList();

     private static final List<RuleActivation> EMPTY_RULE_ACTIVATIONS = Collections.emptyList();

     private static final List<Error> EMPTY_ERRORS = Collections.emptyList();

     public static EmptyValidationReport getInstance() {

         return INSTANCE; 

     }

     private EmptyValidationReport() {}

     public List<Issue> getIssues() {

         return EMPTY_ISSUES;

     }

     public List<RuleActivation> getRuleActivations() {

         return EMPTY_RULE_ACTIVATIONS;

     }

     public List<Error> getErrors() {

         return EMPTY_ERRORS;

     }

     @Override

     public String toString() {

         return "Validation report is empty.";

     }

 }