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/*
* Licensed to ElasticSearch and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. ElasticSearch licenses this
* file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.query;
import com.google.common.collect.Lists;
import gnu.trove.impl.Constants;
import gnu.trove.map.hash.TObjectFloatHashMap;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
/**
* Same as {@link MatchQueryBuilder} but supports multiple fields.
*/
public class MultiMatchQueryBuilder extends BaseQueryBuilder implements BoostableQueryBuilder {
private final Object text;
private final List fields;
private TObjectFloatHashMap fieldsBoosts;
private MatchQueryBuilder.Type type;
private MatchQueryBuilder.Operator operator;
private String analyzer;
private Float boost;
private Integer slop;
private String fuzziness;
private Integer prefixLength;
private Integer maxExpansions;
private String minimumShouldMatch;
private String rewrite = null;
private String fuzzyRewrite = null;
private Boolean useDisMax;
private Float tieBreaker;
private Boolean lenient;
private Float cutoffFrequency = null;
private MatchQueryBuilder.ZeroTermsQuery zeroTermsQuery = null;
/**
* Constructs a new text query.
*/
public MultiMatchQueryBuilder(Object text, String... fields) {
this.fields = Lists.newArrayList();
this.fields.addAll(Arrays.asList(fields));
this.text = text;
}
/**
* Adds a field to run the multi match against.
*/
public MultiMatchQueryBuilder field(String field) {
fields.add(field);
return this;
}
/**
* Adds a field to run the multi match against with a specific boost.
*/
public MultiMatchQueryBuilder field(String field, float boost) {
fields.add(field);
if (fieldsBoosts == null) {
fieldsBoosts = new TObjectFloatHashMap(Constants.DEFAULT_CAPACITY, Constants.DEFAULT_LOAD_FACTOR, -1);
}
fieldsBoosts.put(field, boost);
return this;
}
/**
* Sets the type of the text query.
*/
public MultiMatchQueryBuilder type(MatchQueryBuilder.Type type) {
this.type = type;
return this;
}
/**
* Sets the operator to use when using a boolean query. Defaults to OR.
*/
public MultiMatchQueryBuilder operator(MatchQueryBuilder.Operator operator) {
this.operator = operator;
return this;
}
/**
* Explicitly set the analyzer to use. Defaults to use explicit mapping config for the field, or, if not
* set, the default search analyzer.
*/
public MultiMatchQueryBuilder analyzer(String analyzer) {
this.analyzer = analyzer;
return this;
}
/**
* Set the boost to apply to the query.
*/
public MultiMatchQueryBuilder boost(float boost) {
this.boost = boost;
return this;
}
/**
* Set the phrase slop if evaluated to a phrase query type.
*/
public MultiMatchQueryBuilder slop(int slop) {
this.slop = slop;
return this;
}
/**
* Sets the minimum similarity used when evaluated to a fuzzy query type. Defaults to "0.5".
*/
public MultiMatchQueryBuilder fuzziness(Object fuzziness) {
this.fuzziness = fuzziness.toString();
return this;
}
public MultiMatchQueryBuilder prefixLength(int prefixLength) {
this.prefixLength = prefixLength;
return this;
}
/**
* When using fuzzy or prefix type query, the number of term expansions to use. Defaults to unbounded
* so its recommended to set it to a reasonable value for faster execution.
*/
public MultiMatchQueryBuilder maxExpansions(int maxExpansions) {
this.maxExpansions = maxExpansions;
return this;
}
public MultiMatchQueryBuilder minimumShouldMatch(String minimumShouldMatch) {
this.minimumShouldMatch = minimumShouldMatch;
return this;
}
public MultiMatchQueryBuilder rewrite(String rewrite) {
this.rewrite = rewrite;
return this;
}
public MultiMatchQueryBuilder fuzzyRewrite(String fuzzyRewrite) {
this.fuzzyRewrite = fuzzyRewrite;
return this;
}
public MultiMatchQueryBuilder useDisMax(Boolean useDisMax) {
this.useDisMax = useDisMax;
return this;
}
public MultiMatchQueryBuilder tieBreaker(Float tieBreaker) {
this.tieBreaker = tieBreaker;
return this;
}
/**
* Sets whether format based failures will be ignored.
*/
public MultiMatchQueryBuilder lenient(boolean lenient) {
this.lenient = lenient;
return this;
}
/**
* Set a cutoff value in [0..1] (or absolute number >=1) representing the
* maximum threshold of a terms document frequency to be considered a low
* frequency term.
*/
public MultiMatchQueryBuilder cutoffFrequency(float cutoff) {
this.cutoffFrequency = cutoff;
return this;
}
public MultiMatchQueryBuilder zeroTermsQuery(MatchQueryBuilder.ZeroTermsQuery zeroTermsQuery) {
this.zeroTermsQuery = zeroTermsQuery;
return this;
}
@Override
public void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(MultiMatchQueryParser.NAME);
builder.field("query", text);
builder.startArray("fields");
for (String field : fields) {
float boost = -1;
if (fieldsBoosts != null) {
boost = fieldsBoosts.get(field);
}
if (boost != -1) {
field += "^" + boost;
}
builder.value(field);
}
builder.endArray();
if (type != null) {
builder.field("type", type.toString().toLowerCase(Locale.ENGLISH));
}
if (operator != null) {
builder.field("operator", operator.toString());
}
if (analyzer != null) {
builder.field("analyzer", analyzer);
}
if (boost != null) {
builder.field("boost", boost);
}
if (slop != null) {
builder.field("slop", slop);
}
if (fuzziness != null) {
builder.field("fuzziness", fuzziness);
}
if (prefixLength != null) {
builder.field("prefix_length", prefixLength);
}
if (maxExpansions != null) {
builder.field("max_expansions", maxExpansions);
}
if (minimumShouldMatch != null) {
builder.field("minimum_should_match", minimumShouldMatch);
}
if (rewrite != null) {
builder.field("rewrite", rewrite);
}
if (fuzzyRewrite != null) {
builder.field("fuzzy_rewrite", fuzzyRewrite);
}
if (useDisMax != null) {
builder.field("use_dis_max", useDisMax);
}
if (tieBreaker != null) {
builder.field("tie_breaker", tieBreaker);
}
if (lenient != null) {
builder.field("lenient", lenient);
}
if (cutoffFrequency != null) {
builder.field("cutoff_frequency", cutoffFrequency);
}
if (zeroTermsQuery != null) {
builder.field("zero_terms_query", zeroTermsQuery.toString());
}
builder.endObject();
}
}
