Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
QuadTemplate |
|
| 1.875;1.875 |
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.extractor.xpath; | |
19 | ||
20 | import org.apache.any23.extractor.ExtractionResult; | |
21 | import org.openrdf.model.Resource; | |
22 | import org.openrdf.model.URI; | |
23 | import org.openrdf.model.Value; | |
24 | ||
25 | import java.util.Map; | |
26 | ||
27 | /** | |
28 | * This class models a <i>NQuads</i> template, | |
29 | * that is a quadruple in which any component | |
30 | * can be a variable. | |
31 | * | |
32 | * @author Michele Mostarda (mostarda@fbk.eu) | |
33 | */ | |
34 | public class QuadTemplate { | |
35 | ||
36 | private final TemplateSubject subject; | |
37 | ||
38 | private final TemplatePredicate predicate; | |
39 | ||
40 | private final TemplateObject object; | |
41 | ||
42 | private final TemplateGraph graph; | |
43 | ||
44 | /** | |
45 | * Constructor. | |
46 | * | |
47 | * @param subject not <code>null</code> subject template. | |
48 | * @param predicate not <code>null</code> predicate template. | |
49 | * @param object not <code>null</code> object template. | |
50 | * @param graph graph template, can be <code>null</code>. | |
51 | */ | |
52 | public QuadTemplate( | |
53 | TemplateSubject subject, TemplatePredicate predicate, TemplateObject object, TemplateGraph graph | |
54 | 0 | ) { |
55 | 0 | if(subject == null) { |
56 | 0 | throw new NullPointerException("subject term cannot be null."); |
57 | } | |
58 | 0 | if(predicate == null) { |
59 | 0 | throw new NullPointerException("predicate term cannot be null."); |
60 | } | |
61 | 0 | if(object == null) { |
62 | 0 | throw new NullPointerException("object term cannot be null."); |
63 | } | |
64 | ||
65 | 0 | this.subject = subject; |
66 | 0 | this.predicate = predicate; |
67 | 0 | this.object = object; |
68 | 0 | this.graph = graph; |
69 | 0 | } |
70 | ||
71 | /** | |
72 | * Constructor for template with no graph. | |
73 | * | |
74 | * @param subject | |
75 | * @param predicate | |
76 | * @param object | |
77 | */ | |
78 | public QuadTemplate(TemplateSubject subject, TemplatePredicate predicate, TemplateObject object) { | |
79 | 0 | this(subject, predicate, object, null); |
80 | 0 | } |
81 | ||
82 | /** | |
83 | * @return the template subject. | |
84 | */ | |
85 | public TemplateSubject getSubject() { | |
86 | 0 | return subject; |
87 | } | |
88 | ||
89 | /** | |
90 | * @return the template predicate. | |
91 | */ | |
92 | public TemplatePredicate getPredicate() { | |
93 | 0 | return predicate; |
94 | } | |
95 | ||
96 | /** | |
97 | * @return the template object. | |
98 | */ | |
99 | public TemplateObject getObject() { | |
100 | 0 | return object; |
101 | } | |
102 | ||
103 | /** | |
104 | * @return the template graph, can be <code>null</code>. | |
105 | */ | |
106 | public TemplateGraph getGraph() { | |
107 | 0 | return graph; |
108 | } | |
109 | ||
110 | /** | |
111 | * Prints out this quad template in the given {@link org.apache.any23.extractor.ExtractionResult}, using | |
112 | * the passed <i>variableAssignment</i> to expand variables. | |
113 | * | |
114 | * @param er extraction result instance on which write the quad produced by this template. | |
115 | * @param variableAssignment the assignment used to expand variables. | |
116 | */ | |
117 | public void printOut(ExtractionResult er, Map<String,String> variableAssignment) { | |
118 | 0 | final Resource s = subject.getValue(variableAssignment); |
119 | 0 | final URI p = predicate.getValue(variableAssignment); |
120 | 0 | final Value o = object.getValue(variableAssignment); |
121 | 0 | if(graph != null) { |
122 | 0 | final URI g = graph.getValue(variableAssignment); |
123 | 0 | er.writeTriple(s, p, o, g); |
124 | 0 | } else { |
125 | 0 | er.writeTriple(s, p, o); |
126 | } | |
127 | 0 | } |
128 | ||
129 | @Override | |
130 | public String toString() { | |
131 | 0 | return String.format("%s %s %s %s", subject, predicate, object, graph); |
132 | } | |
133 | ||
134 | } |