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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.derived;
import com.yahoo.config.subscription.ConfigInstanceUtil;
import com.yahoo.document.DataType;
import com.yahoo.document.PositionDataType;
import com.yahoo.searchdefinition.Search;
import com.yahoo.searchdefinition.document.Attribute;
import com.yahoo.searchdefinition.document.ImmutableSDField;
import com.yahoo.searchdefinition.document.Ranking;
import com.yahoo.searchdefinition.document.Sorting;
import com.yahoo.vespa.config.search.AttributesConfig;
import com.yahoo.vespa.indexinglanguage.expressions.ToPositionExpression;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* The set of all attribute fields defined by a search definition
*
* @author bratseth
*/
public class AttributeFields extends Derived implements AttributesConfig.Producer {
public enum FieldSet {ALL, FAST_ACCESS}
private Map<String, Attribute> attributes = new java.util.LinkedHashMap<>();
private Map<String, Attribute> importedAttributes = new java.util.LinkedHashMap<>();
/**
* Flag indicating if a position-attribute has been found
*/
private boolean hasPosition = false;
public AttributeFields(Search search) {
derive(search);
}
/**
* Derives everything from a field
*/
@Override
protected void derive(ImmutableSDField field, Search search) {
if (field.usesStructOrMap() &&
!field.getDataType().equals(PositionDataType.INSTANCE) &&
!field.getDataType().equals(DataType.getArray(PositionDataType.INSTANCE)))
{
return; // Ignore struct fields for indexed search (only implemented for streaming search)
}
if (field.isImportedField()) {
deriveImportedAttributes(field);
} else {
deriveAttributes(field);
}
}
/**
* Return an attribute by name, or null if it doesn't exist
*/
public Attribute getAttribute(String attributeName) {
return attributes.get(attributeName);
}
public boolean containsAttribute(String attributeName) {
return getAttribute(attributeName) != null;
}
/**
* Derives one attribute. TODO: Support non-default named attributes
*/
private void deriveAttributes(ImmutableSDField field) {
for (Attribute fieldAttribute : field.getAttributes().values()) {
deriveAttribute(field, fieldAttribute);
}
if (field.containsExpression(ToPositionExpression.class)) {
// TODO: Move this check to processing and remove this
if (hasPosition) {
throw new IllegalArgumentException("Can not specify more than one set of position attributes per field: " + field.getName());
}
hasPosition = true;
}
}
private void deriveAttribute(ImmutableSDField field, Attribute fieldAttribute) {
Attribute attribute = getAttribute(fieldAttribute.getName());
if (attribute == null) {
attributes.put(fieldAttribute.getName(), fieldAttribute);
attribute = getAttribute(fieldAttribute.getName());
}
Ranking ranking = field.getRanking();
if (ranking != null && ranking.isFilter()) {
attribute.setEnableBitVectors(true);
attribute.setEnableOnlyBitVector(true);
}
}
private void deriveImportedAttributes(ImmutableSDField field) {
for (Attribute attribute : field.getAttributes().values()) {
if (!importedAttributes.containsKey(field.getName())) {
importedAttributes.put(field.getName(), attribute);
}
}
}
/**
* Returns a read only attribute iterator
*/
public Iterator attributeIterator() {
return attributes().iterator();
}
public Collection<Attribute> attributes() {
return Collections.unmodifiableCollection(attributes.values());
}
public String toString() {
return "attributes " + getName();
}
@Override
protected String getDerivedName() {
return "attributes";
}
private Map<String, AttributesConfig.Attribute.Builder> toMap(List<AttributesConfig.Attribute.Builder> ls) {
Map<String, AttributesConfig.Attribute.Builder> ret = new LinkedHashMap<>();
for (AttributesConfig.Attribute.Builder builder : ls) {
ret.put((String) ConfigInstanceUtil.getField(builder, "name"), builder);
}
return ret;
}
@Override
public void getConfig(AttributesConfig.Builder builder) {
getConfig(builder, FieldSet.ALL);
}
private boolean isAttributeInFieldSet(Attribute attribute, FieldSet fs) {
return (fs == FieldSet.ALL) || ((fs == FieldSet.FAST_ACCESS) && attribute.isFastAccess());
}
private AttributesConfig.Attribute.Builder getConfig(Attribute attribute, boolean imported) {
AttributesConfig.Attribute.Builder aaB = new AttributesConfig.Attribute.Builder()
.name(attribute.getName())
.datatype(AttributesConfig.Attribute.Datatype.Enum.valueOf(attribute.getType().getExportAttributeTypeName()))
.collectiontype(AttributesConfig.Attribute.Collectiontype.Enum.valueOf(attribute.getCollectionType().getName()));
if (attribute.isRemoveIfZero()) {
aaB.removeifzero(true);
}
if (attribute.isCreateIfNonExistent()) {
aaB.createifnonexistent(true);
}
aaB.enablebitvectors(attribute.isEnabledBitVectors());
aaB.enableonlybitvector(attribute.isEnabledOnlyBitVector());
if (attribute.isFastSearch()) {
aaB.fastsearch(true);
}
if (attribute.isFastAccess()) {
aaB.fastaccess(true);
}
if (attribute.isHuge()) {
aaB.huge(true);
}
if (attribute.getSorting().isDescending()) {
aaB.sortascending(false);
}
if (attribute.getSorting().getFunction() != Sorting.Function.UCA) {
aaB.sortfunction(AttributesConfig.Attribute.Sortfunction.Enum.valueOf(attribute.getSorting().getFunction().toString()));
}
if (attribute.getSorting().getStrength() != Sorting.Strength.PRIMARY) {
aaB.sortstrength(AttributesConfig.Attribute.Sortstrength.Enum.valueOf(attribute.getSorting().getStrength().toString()));
}
if (!attribute.getSorting().getLocale().isEmpty()) {
aaB.sortlocale(attribute.getSorting().getLocale());
}
aaB.arity(attribute.arity());
aaB.lowerbound(attribute.lowerBound());
aaB.upperbound(attribute.upperBound());
aaB.densepostinglistthreshold(attribute.densePostingListThreshold());
if (attribute.tensorType().isPresent()) {
aaB.tensortype(attribute.tensorType().get().toString());
}
aaB.imported(imported);
return aaB;
}
public void getConfig(AttributesConfig.Builder builder, FieldSet fs) {
for (Attribute attribute : attributes.values()) {
if (isAttributeInFieldSet(attribute, fs)) {
builder.attribute(getConfig(attribute, false));
}
}
if (fs == FieldSet.ALL) {
for (Attribute attribute : importedAttributes.values()) {
builder.attribute(getConfig(attribute, true));
}
}
}
}
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