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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.schema.derived;
import com.yahoo.document.ArrayDataType;
import com.yahoo.document.DataType;
import com.yahoo.document.Field;
import com.yahoo.document.StructuredDataType;
import com.yahoo.document.TensorDataType;
import com.yahoo.document.WeightedSetDataType;
import com.yahoo.schema.Schema;
import com.yahoo.schema.document.FieldSet;
import com.yahoo.schema.document.ImmutableSDField;
import com.yahoo.vespa.config.search.IndexschemaConfig;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* Deriver of indexschema config containing information of all text index fields with name and data type.
*
* @author geirst
*/
public class IndexSchema extends Derived implements IndexschemaConfig.Producer {
private final List<IndexField> fields = new ArrayList<>();
private final Map<String, FieldCollection> collections = new LinkedHashMap<>();
private final Map<String, FieldSet> fieldSets = new LinkedHashMap<>();
public IndexSchema(Schema schema) {
fieldSets.putAll(schema.fieldSets().userFieldSets());
derive(schema);
}
public boolean containsField(String fieldName) {
return fields.stream().anyMatch(field -> field.getName().equals(fieldName));
}
@Override
protected void derive(Schema schema) {
super.derive(schema);
}
private boolean isTensorField(ImmutableSDField field) {
return field.getDataType() instanceof TensorDataType;
}
private void deriveIndexFields(ImmutableSDField field, Schema schema) {
// Note: Indexes for tensor fields are NOT part of the index schema for text fields.
if ((!field.doesIndexing() && !field.isIndexStructureField()) ||
isTensorField(field))
{
return;
}
List<Field> lst = flattenField(field.asField());
if (lst.isEmpty()) {
return;
}
String fieldName = field.getName();
for (Field flatField : lst) {
deriveIndexFields(flatField, schema);
}
if (lst.size() > 1) {
FieldSet fieldSet = new FieldSet(fieldName);
for (Field flatField : lst) {
fieldSet.addFieldName(flatField.getName());
}
fieldSets.put(fieldName, fieldSet);
}
}
private void deriveIndexFields(Field field, Schema schema) {
IndexField toAdd = new IndexField(field.getName(), Index.convertType(field.getDataType()), field.getDataType());
com.yahoo.schema.Index definedIndex = schema.getIndex(field.getName());
if (definedIndex != null) {
toAdd.setIndexSettings(definedIndex);
}
fields.add(toAdd);
addFieldToCollection(field.getName(), field.getName()); // implicit
}
private FieldCollection getCollection(String collectionName) {
FieldCollection retval = collections.get(collectionName);
if (retval == null) {
collections.put(collectionName, new FieldCollection(collectionName));
return collections.get(collectionName);
}
return retval;
}
private void addFieldToCollection(String fieldName, String collectionName) {
FieldCollection collection = getCollection(collectionName);
collection.fields.add(fieldName);
}
@Override
protected void derive(ImmutableSDField field, Schema schema) {
if (field.usesStructOrMap()) {
return; // unsupported
}
deriveIndexFields(field, schema);
}
@Override
protected String getDerivedName() {
return "indexschema";
}
@Override
public void getConfig(IndexschemaConfig.Builder icB) {
for (IndexField f : fields) {
IndexschemaConfig.Indexfield.Builder ifB = new IndexschemaConfig.Indexfield.Builder()
.name(f.getName())
.datatype(IndexschemaConfig.Indexfield.Datatype.Enum.valueOf(f.getType()))
.prefix(f.hasPrefix())
.phrases(false)
.positions(true)
.interleavedfeatures(f.useInterleavedFeatures());
if (!f.getCollectionType().equals("SINGLE")) {
ifB.collectiontype(IndexschemaConfig.Indexfield.Collectiontype.Enum.valueOf(f.getCollectionType()));
}
icB.indexfield(ifB);
}
for (FieldSet fieldSet : fieldSets.values()) {
IndexschemaConfig.Fieldset.Builder fsB = new IndexschemaConfig.Fieldset.Builder()
.name(fieldSet.getName());
for (String f : fieldSet.getFieldNames()) {
fsB.field(new IndexschemaConfig.Fieldset.Field.Builder()
.name(f));
}
icB.fieldset(fsB);
}
}
static List<Field> flattenField(Field field) {
DataType fieldType = field.getDataType();
if (fieldType.getPrimitiveType() != null){
return Collections.singletonList(field);
}
if (fieldType instanceof ArrayDataType) {
List<Field> ret = new LinkedList<>();
Field innerField = new Field(field.getName(), ((ArrayDataType)fieldType).getNestedType());
for (Field flatField : flattenField(innerField)) {
ret.add(new Field(flatField.getName(), DataType.getArray(flatField.getDataType())));
}
return ret;
}
if (fieldType instanceof StructuredDataType) {
List<Field> ret = new LinkedList<>();
String fieldName = field.getName();
for (Field childField : ((StructuredDataType)fieldType).getFields()) {
for (Field flatField : flattenField(childField)) {
ret.add(new Field(fieldName + "." + flatField.getName(), flatField));
}
}
return ret;
}
throw new UnsupportedOperationException(fieldType.getName());
}
public List<IndexField> getFields() {
return fields;
}
/**
* Representation of an index field with name and data type.
*/
public static class IndexField {
private final String name;
private final Index.Type type;
private final DataType sdFieldType;
private boolean prefix = false;
// Whether the posting lists of this index field should have interleaved features (num occs, field length) in document id stream.
private boolean interleavedFeatures = false;
public IndexField(String name, Index.Type type, DataType sdFieldType) {
this.name = name;
this.type = type;
this.sdFieldType = sdFieldType;
}
public void setIndexSettings(com.yahoo.schema.Index index) {
if (type.equals(Index.Type.TEXT)) {
prefix = index.isPrefix();
interleavedFeatures = index.useInterleavedFeatures();
}
}
public String getName() { return name; }
public String getType() {
return type.equals(Index.Type.INT64)
? "INT64" : "STRING";
}
public String getCollectionType() {
return (sdFieldType == null)
? "SINGLE"
: (sdFieldType instanceof WeightedSetDataType)
? "WEIGHTEDSET"
: (sdFieldType instanceof ArrayDataType)
? "ARRAY"
: "SINGLE";
}
public boolean hasPrefix() { return prefix; }
public boolean useInterleavedFeatures() { return interleavedFeatures; }
}
/**
* Representation of a collection of fields (aka index, physical view).
*/
@SuppressWarnings({ "UnusedDeclaration" })
private static class FieldCollection {
private final String name;
private final List<String> fields = new ArrayList<>();
FieldCollection(String name) {
this.name = name;
}
}
}
|
