1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* Modifications Copyright (C) 2021 Bell Canada.
* ================================================================================
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.spi.query;
import static org.springframework.util.StringUtils.isEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;
import org.onap.cps.spi.exceptions.CpsPathException;
@Getter
@Setter(AccessLevel.PRIVATE)
public class CpsPathQuery {
private CpsPathQueryType cpsPathQueryType;
private String xpathPrefix;
private String leafName;
private Object leafValue;
private String descendantName;
private Map<String, Object> leavesData;
private String ancestorSchemaNodeIdentifier;
private static final String NON_CAPTURING_GROUP_1_TO_99_YANG_CONTAINERS = "((?:\\/[^\\/]+){1,99})";
private static final String YANG_LEAF_VALUE_EQUALS_CONDITION =
"\\[\\s{0,9}@(\\S+?)\\s{0,9}=\\s{0,9}(.*?)\\s{0,9}\\]";
private static final Pattern QUERY_CPS_PATH_WITH_SINGLE_LEAF_PATTERN =
Pattern.compile(NON_CAPTURING_GROUP_1_TO_99_YANG_CONTAINERS + YANG_LEAF_VALUE_EQUALS_CONDITION);
private static final Pattern DESCENDANT_ANYWHERE_PATTERN = Pattern.compile("\\/\\/([^\\/][^:]+)");
private static final Pattern LEAF_INTEGER_VALUE_PATTERN = Pattern.compile("[-+]?\\d+");
private static final Pattern LEAF_STRING_VALUE_IN_SINGLE_QUOTES_PATTERN = Pattern.compile("'(.*)'");
private static final Pattern LEAF_STRING_VALUE_IN_DOUBLE_QUOTES_PATTERN = Pattern.compile("\"(.*)\"");
private static final String YANG_MULTIPLE_LEAF_VALUE_EQUALS_CONDITION = "\\[(.*?)\\s{0,9}]";
private static final Pattern DESCENDANT_ANYWHERE_PATTERN_WITH_MULTIPLE_LEAF_PATTERN =
Pattern.compile(DESCENDANT_ANYWHERE_PATTERN + YANG_MULTIPLE_LEAF_VALUE_EQUALS_CONDITION);
private static final String INDIVIDUAL_LEAF_DETAIL_PATTERN = ("\\s{0,9}and\\s{0,9}");
private static final Pattern LEAF_VALUE_PATTERN = Pattern.compile("@(\\S+?)=(.*)");
private static final Pattern ANCESTOR_AXIS_PATTERN = Pattern.compile("(\\S+)\\/ancestor::\\/?(\\S+)");
/**
* Returns a cps path query.
*
* @param cpsPathSource cps path
* @return a CpsPath object.
*/
public static CpsPathQuery createFrom(final String cpsPathSource) {
var cpsPath = cpsPathSource;
final CpsPathQuery cpsPathQuery = new CpsPathQuery();
var matcher = ANCESTOR_AXIS_PATTERN.matcher(cpsPath);
if (matcher.matches()) {
cpsPath = matcher.group(1);
cpsPathQuery.setAncestorSchemaNodeIdentifier(matcher.group(2));
}
matcher = QUERY_CPS_PATH_WITH_SINGLE_LEAF_PATTERN.matcher(cpsPath);
if (matcher.matches()) {
cpsPathQuery.setParametersForSingleLeafValue(cpsPath, matcher);
return cpsPathQuery;
}
matcher = DESCENDANT_ANYWHERE_PATTERN_WITH_MULTIPLE_LEAF_PATTERN.matcher(cpsPath);
if (matcher.matches()) {
cpsPathQuery.setParametersForDescendantWithLeafValues(cpsPath, matcher);
return cpsPathQuery;
}
matcher = DESCENDANT_ANYWHERE_PATTERN.matcher(cpsPath);
if (matcher.matches()) {
cpsPathQuery.setParametersForDescendantAnywhere(matcher);
return cpsPathQuery;
}
throw new CpsPathException("Invalid cps path.",
String.format("Cannot interpret or parse cps path '%s'.", cpsPath));
}
/**
* Has ancestor axis been populated.
*
* @return boolean value.
*/
public boolean hasAncestorAxis() {
return !(isEmpty(ancestorSchemaNodeIdentifier));
}
private void setParametersForSingleLeafValue(final String cpsPath, final Matcher matcher) {
setCpsPathQueryType(CpsPathQueryType.XPATH_LEAF_VALUE);
setXpathPrefix(matcher.group(1));
setLeafName(matcher.group(2));
setLeafValue(convertLeafValueToCorrectType(matcher.group(3), cpsPath));
}
private void setParametersForDescendantWithLeafValues(final String cpsPath, final Matcher matcher) {
setCpsPathQueryType(CpsPathQueryType.XPATH_HAS_DESCENDANT_WITH_LEAF_VALUES);
setDescendantName(matcher.group(1));
final Map<String, Object> leafData = new HashMap<>();
for (final String leafValuePair : matcher.group(2).split(INDIVIDUAL_LEAF_DETAIL_PATTERN)) {
final var descendentMatcher = LEAF_VALUE_PATTERN.matcher(leafValuePair);
if (descendentMatcher.matches()) {
leafData.put(descendentMatcher.group(1),
convertLeafValueToCorrectType(descendentMatcher.group(2), cpsPath));
} else {
throw new CpsPathException("Invalid cps path.",
String.format("Cannot interpret or parse attributes in cps path '%s'.", cpsPath));
}
}
setLeavesData(leafData);
}
private void setParametersForDescendantAnywhere(final Matcher matcher) {
setCpsPathQueryType(CpsPathQueryType.XPATH_HAS_DESCENDANT_ANYWHERE);
setDescendantName(matcher.group(1));
}
private static Object convertLeafValueToCorrectType(final String leafValueString, final String cpsPath) {
final var stringValueWithSingleQuotesMatcher =
LEAF_STRING_VALUE_IN_SINGLE_QUOTES_PATTERN.matcher(leafValueString);
if (stringValueWithSingleQuotesMatcher.matches()) {
return stringValueWithSingleQuotesMatcher.group(1);
}
final var stringValueWithDoubleQuotesMatcher =
LEAF_STRING_VALUE_IN_DOUBLE_QUOTES_PATTERN.matcher(leafValueString);
if (stringValueWithDoubleQuotesMatcher.matches()) {
return stringValueWithDoubleQuotesMatcher.group(1);
}
final var integerValueMatcher = LEAF_INTEGER_VALUE_PATTERN.matcher(leafValueString);
if (integerValueMatcher.matches()) {
return Integer.valueOf(leafValueString);
}
throw new CpsPathException("Unsupported leaf value.",
String.format("Unsupported leaf value '%s' in cps path '%s'.", leafValueString, cpsPath));
}
}
|