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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchdefinition.processing;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.document.DataType;
import com.yahoo.searchdefinition.DocumentReference;
import com.yahoo.searchdefinition.DocumentReferences;
import com.yahoo.searchdefinition.RankProfileRegistry;
import com.yahoo.searchdefinition.Search;
import com.yahoo.searchdefinition.document.ImmutableSDField;
import com.yahoo.searchdefinition.document.ImportedField;
import com.yahoo.searchdefinition.document.ImportedFields;
import com.yahoo.searchdefinition.document.TemporaryImportedField;
import com.yahoo.vespa.model.container.search.QueryProfiles;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Optional;
/**
* Iterates all imported fields from SD-parsing and validates and resolves them into concrete fields from referenced document types.
*
* @author geirst
*/
public class ImportedFieldsResolver extends Processor {
private final Map<String, ImportedField> importedFields = new LinkedHashMap<>();
private final Optional<DocumentReferences> references;
public ImportedFieldsResolver(Search search, DeployLogger deployLogger, RankProfileRegistry rankProfileRegistry, QueryProfiles queryProfiles) {
super(search, deployLogger, rankProfileRegistry, queryProfiles);
references = search.getDocument().getDocumentReferences();
}
@Override
public void process(boolean validate, boolean documentsOnly) {
search.temporaryImportedFields().get().fields().forEach((name, field) -> resolveImportedField(field, validate));
search.setImportedFields(new ImportedFields(importedFields));
}
private void resolveImportedField(TemporaryImportedField importedField, boolean validate) {
DocumentReference reference = validateDocumentReference(importedField);
ImmutableSDField targetField = validateTargetField(importedField, reference, validate);
importedFields.put(importedField.fieldName(), new ImportedField(importedField.fieldName(), reference, targetField));
}
private DocumentReference validateDocumentReference(TemporaryImportedField importedField) {
String referenceFieldName = importedField.referenceFieldName();
DocumentReference reference = references.get().referenceMap().get(referenceFieldName);
if (reference == null) {
fail(importedField, "Reference field '" + referenceFieldName + "' not found");
}
return reference;
}
private ImmutableSDField validateTargetField(TemporaryImportedField importedField,
DocumentReference reference,
boolean validate) {
String targetFieldName = importedField.targetFieldName();
Search targetSearch = reference.targetSearch();
ImmutableSDField targetField = targetSearch.getField(targetFieldName);
if (targetField == null) {
fail(importedField, targetFieldAsString(targetFieldName, reference) + ": Not found");
}
if (validate) {
if (!targetField.doesAttributing()) {
fail(importedField, targetFieldAsString(targetFieldName, reference) +
": Is not an attribute field. Only attribute fields supported");
} else if (targetField.doesIndexing()) {
fail(importedField, targetFieldAsString(targetFieldName, reference) +
": Is an index field. Not supported");
} else if (targetField.getDataType().equals(DataType.PREDICATE)) {
fail(importedField, targetFieldAsString(targetFieldName, reference) +
": Is of type 'predicate'. Not supported");
}
}
return targetField;
}
private static String targetFieldAsString(String targetFieldName, DocumentReference reference) {
return "Field '" + targetFieldName + "' via reference field '" + reference.referenceField().getName() + "'";
}
private void fail(TemporaryImportedField importedField, String msg) {
throw new IllegalArgumentException("For search '" + search.getName() + "', import field '" + importedField.fieldName() + "': " + msg);
}
}
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