blob: 3d4934ed841a508591bf6014ad40a1bbaeb0207a (
plain) (
blame)
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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.schema.processing;
import com.yahoo.document.DataType;
import com.yahoo.document.Field;
import com.yahoo.schema.Schema;
import com.yahoo.schema.document.Attribute;
import com.yahoo.vespa.indexinglanguage.ValueTransformProvider;
import com.yahoo.vespa.indexinglanguage.expressions.AttributeExpression;
import com.yahoo.vespa.indexinglanguage.expressions.Expression;
import com.yahoo.vespa.indexinglanguage.expressions.IndexExpression;
import com.yahoo.vespa.indexinglanguage.expressions.OutputExpression;
import com.yahoo.vespa.indexinglanguage.expressions.SummaryExpression;
/**
* @author Simon Thoresen Hult
*/
public abstract class TypedTransformProvider extends ValueTransformProvider {
private final Schema schema;
private DataType fieldType;
TypedTransformProvider(Class<? extends Expression> transformClass, Schema schema) {
super(transformClass);
this.schema = schema;
}
@Override
protected final boolean requiresTransform(Expression exp) {
if (exp instanceof OutputExpression) {
String fieldName = ((OutputExpression)exp).getFieldName();
if (fieldName == null) {
// Incomplete output expressions never require a transform.
return false;
}
if (exp instanceof AttributeExpression) {
Attribute attribute = schema.getAttribute(fieldName);
if (attribute == null)
throw new IllegalArgumentException("Attribute '" + fieldName + "' not found.");
fieldType = attribute.getDataType();
}
else if (exp instanceof IndexExpression) {
Field field = schema.getConcreteField(fieldName);
if (field == null)
throw new IllegalArgumentException("Index field '" + fieldName + "' not found.");
fieldType = field.getDataType();
}
else if (exp instanceof SummaryExpression) {
Field field = schema.getSummaryField(fieldName);
if (field == null) {
// Use document field if summary field is not found
var sdField = schema.getConcreteField(fieldName);
if (sdField != null && sdField.doesSummarying()) {
fieldType = sdField.getDataType();
} else {
throw new IllegalArgumentException("Summary field '" + fieldName + "' not found.");
}
} else {
fieldType = field.getDataType();
}
}
else {
throw new UnsupportedOperationException();
}
}
return requiresTransform(exp, fieldType);
}
@Override
protected final Expression newTransform() {
return newTransform(fieldType);
}
protected abstract boolean requiresTransform(Expression exp, DataType fieldType);
protected abstract Expression newTransform(DataType fieldType);
}
|
