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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *  http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.any23.validator;
19  
20  import java.util.Collections;
21  import java.util.List;
22  
23  /**
24   * An implementation of {@link ValidationReportBuilder} with no data.
25   *
26   * @author Davide Palmisano (palmisano@fbk.eu)
27   * @author Michele Mostarda (mostarda@fbk.eu)
28   */
29  
30  @XMLValidationReportSerializer.NodeName("validationReport")
31  public class EmptyValidationReport implements ValidationReport {
32  
33      private static final EmptyValidationReportort.html#EmptyValidationReport">EmptyValidationReport INSTANCE = new EmptyValidationReport();
34  
35      private static final List<Issue> EMPTY_ISSUES = Collections.emptyList();
36      private static final List<RuleActivation> EMPTY_RULE_ACTIVATIONS = Collections.emptyList();
37      private static final List<Error> EMPTY_ERRORS = Collections.emptyList();
38  
39      public static EmptyValidationReport getInstance() {
40          return INSTANCE; 
41      }
42  
43      private EmptyValidationReport() {}
44  
45      public List<Issue> getIssues() {
46          return EMPTY_ISSUES;
47      }
48  
49      public List<RuleActivation> getRuleActivations() {
50          return EMPTY_RULE_ACTIVATIONS;
51      }
52  
53      public List<Error> getErrors() {
54          return EMPTY_ERRORS;
55      }
56  
57      @Override
58      public String toString() {
59          return "Validation report is empty.";
60      }
61  }