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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.search.grouping;
import com.yahoo.component.annotation.Inject;
import com.yahoo.component.chain.dependencies.After;
import com.yahoo.component.chain.dependencies.Before;
import com.yahoo.component.chain.dependencies.Provides;
import com.yahoo.processing.IllegalInputException;
import com.yahoo.search.grouping.request.AttributeMapLookupValue;
import com.yahoo.vespa.config.search.AttributesConfig;
import com.yahoo.container.QrSearchersConfig;
import com.yahoo.processing.request.CompoundName;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.Searcher;
import com.yahoo.search.config.ClusterConfig;
import com.yahoo.search.grouping.request.AttributeValue;
import com.yahoo.search.grouping.request.ExpressionVisitor;
import com.yahoo.search.grouping.request.GroupingExpression;
import com.yahoo.search.searchchain.Execution;
import com.yahoo.search.searchchain.PhaseNames;
import java.util.HashMap;
import static com.yahoo.search.grouping.GroupingQueryParser.SELECT_PARAMETER_PARSING;
/**
* This searcher ensure that all {@link GroupingRequest} objects attached to a {@link Query} makes sense to the search
* cluster for which this searcher has been deployed. This searcher uses exceptions to signal invalid grouping
* requests.
*
* @author Simon Thoresen Hult
*/
@Before(PhaseNames.BACKEND)
@After(SELECT_PARAMETER_PARSING)
@Provides(GroupingValidator.GROUPING_VALIDATED)
public class GroupingValidator extends Searcher {
public static final String GROUPING_VALIDATED = "GroupingValidated";
public static final CompoundName PARAM_ENABLED = CompoundName.from("validate_" + GroupingQueryParser.PARAM_REQUEST);
private final HashMap<String, AttributesConfig.Attribute> attributes = new HashMap<>();
private final String clusterName;
private final boolean enabled;
/**
* Constructs a new instance of this searcher with the given component id and config.
*
* @param qrsConfig The shared config for all searchers.
* @param clusterConfig The config for the cluster that this searcher is deployed for.
*/
@Inject
public GroupingValidator(QrSearchersConfig qrsConfig, ClusterConfig clusterConfig,
AttributesConfig attributesConfig) {
int clusterId = clusterConfig.clusterId();
var searchCluster = qrsConfig.searchcluster(clusterId);
QrSearchersConfig.Searchcluster.Indexingmode.Enum indexingMode = searchCluster.indexingmode();
enabled = (indexingMode != QrSearchersConfig.Searchcluster.Indexingmode.STREAMING);
clusterName = searchCluster.name();
for (AttributesConfig.Attribute attr : attributesConfig.attribute()) {
attributes.put(attr.name(), attr);
}
}
@Override
public Result search(Query query, Execution execution) {
if (enabled && query.properties().getBoolean(PARAM_ENABLED, true)) {
ExpressionVisitor visitor = new MyVisitor();
for (GroupingRequest req : query.getSelect().getGrouping())
req.getRootOperation().visitExpressions(visitor);
}
return execution.search(query);
}
private void verifyHasAttribute(String attributeName) {
if (!attributes.containsKey(attributeName)) {
throw new UnavailableAttributeException(clusterName, attributeName);
}
}
private void verifyCompatibleAttributeTypes(String keyAttributeName,
String keySourceAttributeName) {
AttributesConfig.Attribute keyAttribute = attributes.get(keyAttributeName);
AttributesConfig.Attribute keySourceAttribute = attributes.get(keySourceAttributeName);
if (!keySourceAttribute.datatype().equals(keyAttribute.datatype())) {
throw new IllegalInputException("Grouping request references key source attribute '" +
keySourceAttributeName + "' with data type '" + keySourceAttribute.datatype() +
"' that is different than data type '" + keyAttribute.datatype() + "' of key attribute '" +
keyAttributeName + "'");
}
if (!keySourceAttribute.collectiontype().equals(AttributesConfig.Attribute.Collectiontype.Enum.SINGLE)) {
throw new IllegalInputException("Grouping request references key source attribute '" +
keySourceAttributeName + "' which is not of single value type");
}
}
private class MyVisitor implements ExpressionVisitor {
@Override
public void visitExpression(GroupingExpression exp) {
if (exp instanceof AttributeMapLookupValue mapLookup) {
verifyHasAttribute(mapLookup.getKeyAttribute());
verifyHasAttribute(mapLookup.getValueAttribute());
if (mapLookup.hasKeySourceAttribute()) {
verifyHasAttribute(mapLookup.getKeySourceAttribute());
verifyCompatibleAttributeTypes(mapLookup.getKeyAttribute(), mapLookup.getKeySourceAttribute());
}
} else if (exp instanceof AttributeValue) {
verifyHasAttribute(((AttributeValue) exp).getAttributeName());
}
}
}
}
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