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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.documentmodel;
import com.yahoo.document.DataType;
import com.yahoo.document.Field;
import java.util.ArrayList;
import java.util.List;
/**
* @author baldersheim
*/
public class SearchField extends Field {
/// Indicate if field shall be stored in memory for attribute usage.
private boolean attribute = false;
/// Indicate if the field is Vespa indexed.
private boolean indexed = false;
/// Indication to backend on how much optimization should be done.
/**
* This is a representation of features to generate for this field.
* It can be both optimize hints, and real functional hints.
*/
public enum Feature {
WEIGHT_IN_ATTRIBUTE_POSTINGS("WeightInAttributePosting"), // Hint to put the weight in postings for attribute.
WORDPOS_IN_POSTINGS("WordPosInPosting"), // Default for generating posocc
FILTER_ONLY("FilterOnly"); // Might only generate bitvector
private String name;
Feature(String name) { this.name = name;}
public String getName() { return name; }
}
private List<Feature> featureList = new ArrayList<>();
public SearchField(Field field, boolean indexed, boolean attribute) {
this(field, indexed, attribute, null);
}
public SearchField(Field field, boolean indexed, boolean attribute, List<Feature> features) {
super(field.getName(), field);
this.attribute = attribute;
this.indexed = indexed;
if (features != null) {
featureList.addAll(features);
}
validate();
}
private void validate() {
if (attribute || !indexed) {
return;
}
DataType fieldType = getDataType();
DataType primiType = fieldType.getPrimitiveType();
if (DataType.STRING.equals(primiType) || DataType.URI.equals(primiType)) {
return;
}
throw new IllegalArgumentException("Expected type " + DataType.STRING.getName() + " for indexed field '" +
getName() + "', got " + fieldType.getName() + ".");
}
public SearchField setIndexed() { indexed = true; validate(); return this; }
public SearchField setAttribute() { attribute = true; validate(); return this; }
public boolean isAttribute() { return attribute; }
public boolean isIndexed() { return indexed; }
public SearchField addFeature(Feature feature) { featureList.add(feature); validate(); return this; }
}
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