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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.application.validation.change.search;
import com.yahoo.config.application.api.ValidationId;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.document.StructDataType;
import com.yahoo.documentmodel.NewDocumentType;
import com.yahoo.document.Field;
import com.yahoo.vespa.model.application.validation.change.VespaConfigChangeAction;
import com.yahoo.vespa.model.application.validation.change.VespaRefeedAction;
import java.util.List;
import java.util.stream.Collectors;
/**
* Validates the changes between a current and next document type used in a document database.
*
* @author toregge
*/
public class DocumentTypeChangeValidator {
private final ClusterSpec.Id id;
private final NewDocumentType currentDocType;
private final NewDocumentType nextDocType;
private static abstract class FieldChange {
protected final Field currentField;
protected final Field nextField;
public FieldChange(Field currentField, Field nextField) {
this.currentField = currentField;
this.nextField = nextField;
}
public String fieldName() {
return currentField.getName();
}
public boolean valid() {
return nextField != null;
}
public abstract boolean changedType();
public abstract String currentTypeName();
public abstract String nextTypeName();
}
private static class SimpleFieldChange extends FieldChange {
public SimpleFieldChange(Field currentField, Field nextField) {
super(currentField, nextField);
}
public boolean changedType() {
return !currentField.getDataType().equals(nextField.getDataType());
}
public String currentTypeName() {
return currentField.getDataType().getName();
}
public String nextTypeName() {
return nextField.getDataType().getName();
}
}
private static class StructFieldChange extends FieldChange {
private final StructDataType currentType;
private final StructDataType nextType;
public StructFieldChange(Field currentField, Field nextField) {
super(currentField, nextField);
this.currentType = (StructDataType)currentField.getDataType();
this.nextType = (StructDataType)nextField.getDataType();
}
public boolean changedType() {
return changedType(currentType, nextType);
}
public String currentTypeName() {
return toString(currentType);
}
public String nextTypeName() {
return toString(nextType);
}
private static boolean changedType(StructDataType currentType, StructDataType nextType) {
for (Field currentField : currentType.getFields()) {
Field nextField = nextType.getField(currentField.getName());
if (nextField != null) {
if (areStructFields(currentField, nextField)) {
if (changedType((StructDataType) currentField.getDataType(),
(StructDataType) nextField.getDataType())) {
return true;
}
} else {
if (!currentField.getDataType().equals(nextField.getDataType())) {
return true;
}
}
}
}
return false;
}
private static String toString(StructDataType dataType) {
StringBuilder builder = new StringBuilder();
builder.append(dataType.getName()).append(":{");
boolean first = true;
for (Field field : dataType.getFields()) {
if (!first) {
builder.append(",");
}
if (field.getDataType() instanceof StructDataType) {
builder.append(toString((StructDataType) field.getDataType()));
} else {
builder.append(field.getName() + ":" + field.getDataType().getName());
}
first = false;
}
builder.append("}");
return builder.toString();
}
}
public DocumentTypeChangeValidator(ClusterSpec.Id id,
NewDocumentType currentDocType,
NewDocumentType nextDocType) {
this.id = id;
this.currentDocType = currentDocType;
this.nextDocType = nextDocType;
}
public List<VespaConfigChangeAction> validate() {
return currentDocType.getAllFields().stream().
map(field -> createFieldChange(field, nextDocType)).
filter(fieldChange -> fieldChange.valid() && fieldChange.changedType()).
map(fieldChange -> VespaRefeedAction.of(id,
ValidationId.fieldTypeChange,
new ChangeMessageBuilder(fieldChange.fieldName()).
addChange("data type", fieldChange.currentTypeName(),
fieldChange.nextTypeName()).build()
)).
collect(Collectors.toList());
}
private static FieldChange createFieldChange(Field currentField, NewDocumentType nextDocType) {
Field nextField = nextDocType.getField(currentField.getName());
if (nextField != null && areStructFields(currentField, nextField)) {
return new StructFieldChange(currentField, nextField);
}
return new SimpleFieldChange(currentField, nextField);
}
private static boolean areStructFields(Field currentField, Field nextField) {
return (currentField.getDataType() instanceof StructDataType) &&
(nextField.getDataType() instanceof StructDataType);
}
}
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