org.elasticsearch.index.query.SpanNotQueryBuilder Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elasticsearch 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 org.apache.lucene.search.Query;
import org.apache.lucene.search.spans.SpanNotQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
import java.util.Objects;
import java.util.Optional;
public class SpanNotQueryBuilder extends AbstractQueryBuilder implements SpanQueryBuilder {
public static final String NAME = "span_not";
/** the default pre parameter size */
public static final int DEFAULT_PRE = 0;
/** the default post parameter size */
public static final int DEFAULT_POST = 0;
private static final ParseField POST_FIELD = new ParseField("post");
private static final ParseField PRE_FIELD = new ParseField("pre");
private static final ParseField DIST_FIELD = new ParseField("dist");
private static final ParseField EXCLUDE_FIELD = new ParseField("exclude");
private static final ParseField INCLUDE_FIELD = new ParseField("include");
private final SpanQueryBuilder include;
private final SpanQueryBuilder exclude;
private int pre = DEFAULT_PRE;
private int post = DEFAULT_POST;
/**
* Construct a span query matching spans from include which
* have no overlap with spans from exclude.
* @param include the span query whose matches are filtered
* @param exclude the span query whose matches must not overlap
*/
public SpanNotQueryBuilder(SpanQueryBuilder include, SpanQueryBuilder exclude) {
if (include == null) {
throw new IllegalArgumentException("inner clause [include] cannot be null.");
}
if (exclude == null) {
throw new IllegalArgumentException("inner clause [exclude] cannot be null.");
}
this.include = include;
this.exclude = exclude;
}
/**
* Read from a stream.
*/
public SpanNotQueryBuilder(StreamInput in) throws IOException {
super(in);
include = (SpanQueryBuilder) in.readNamedWriteable(QueryBuilder.class);
exclude = (SpanQueryBuilder) in.readNamedWriteable(QueryBuilder.class);
pre = in.readVInt();
post = in.readVInt();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(include);
out.writeNamedWriteable(exclude);
out.writeVInt(pre);
out.writeVInt(post);
}
/**
* @return the span query whose matches are filtered
*/
public SpanQueryBuilder includeQuery() {
return this.include;
}
/**
* @return the span query whose matches must not overlap
*/
public SpanQueryBuilder excludeQuery() {
return this.exclude;
}
/**
* @param dist the amount of tokens from within the include span can’t have overlap with the exclude span.
* Equivalent to setting both pre and post parameter.
*/
public SpanNotQueryBuilder dist(int dist) {
pre(dist);
post(dist);
return this;
}
/**
* @param pre the amount of tokens before the include span that can’t have overlap with the exclude span. Values
* smaller than 0 will be ignored and 0 used instead.
*/
public SpanNotQueryBuilder pre(int pre) {
this.pre = (pre >= 0) ? pre : 0;
return this;
}
/**
* @return the amount of tokens before the include span that can’t have overlap with the exclude span.
* @see SpanNotQueryBuilder#pre(int)
*/
public Integer pre() {
return this.pre;
}
/**
* @param post the amount of tokens after the include span that can’t have overlap with the exclude span.
*/
public SpanNotQueryBuilder post(int post) {
this.post = (post >= 0) ? post : 0;
return this;
}
/**
* @return the amount of tokens after the include span that can’t have overlap with the exclude span.
* @see SpanNotQueryBuilder#post(int)
*/
public Integer post() {
return this.post;
}
@Override
protected void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(NAME);
builder.field(INCLUDE_FIELD.getPreferredName());
include.toXContent(builder, params);
builder.field(EXCLUDE_FIELD.getPreferredName());
exclude.toXContent(builder, params);
builder.field(PRE_FIELD.getPreferredName(), pre);
builder.field(POST_FIELD.getPreferredName(), post);
printBoostAndQueryName(builder);
builder.endObject();
}
public static Optional fromXContent(QueryParseContext parseContext) throws IOException {
XContentParser parser = parseContext.parser();
float boost = AbstractQueryBuilder.DEFAULT_BOOST;
SpanQueryBuilder include = null;
SpanQueryBuilder exclude = null;
Integer dist = null;
Integer pre = null;
Integer post = null;
String queryName = null;
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if (INCLUDE_FIELD.match(currentFieldName)) {
Optional query = parseContext.parseInnerQueryBuilder();
if (query.isPresent() == false || query.get() instanceof SpanQueryBuilder == false) {
throw new ParsingException(parser.getTokenLocation(), "spanNot [include] must be of type span query");
}
include = (SpanQueryBuilder) query.get();
} else if (EXCLUDE_FIELD.match(currentFieldName)) {
Optional query = parseContext.parseInnerQueryBuilder();
if (query.isPresent() == false || query.get() instanceof SpanQueryBuilder == false) {
throw new ParsingException(parser.getTokenLocation(), "spanNot [exclude] must be of type span query");
}
exclude = (SpanQueryBuilder) query.get();
} else {
throw new ParsingException(parser.getTokenLocation(), "[span_not] query does not support [" + currentFieldName + "]");
}
} else {
if (DIST_FIELD.match(currentFieldName)) {
dist = parser.intValue();
} else if (PRE_FIELD.match(currentFieldName)) {
pre = parser.intValue();
} else if (POST_FIELD.match(currentFieldName)) {
post = parser.intValue();
} else if (AbstractQueryBuilder.BOOST_FIELD.match(currentFieldName)) {
boost = parser.floatValue();
} else if (AbstractQueryBuilder.NAME_FIELD.match(currentFieldName)) {
queryName = parser.text();
} else {
throw new ParsingException(parser.getTokenLocation(), "[span_not] query does not support [" + currentFieldName + "]");
}
}
}
if (include == null) {
throw new ParsingException(parser.getTokenLocation(), "spanNot must have [include] span query clause");
}
if (exclude == null) {
throw new ParsingException(parser.getTokenLocation(), "spanNot must have [exclude] span query clause");
}
if (dist != null && (pre != null || post != null)) {
throw new ParsingException(parser.getTokenLocation(), "spanNot can either use [dist] or [pre] & [post] (or none)");
}
SpanNotQueryBuilder spanNotQuery = new SpanNotQueryBuilder(include, exclude);
if (dist != null) {
spanNotQuery.dist(dist);
}
if (pre != null) {
spanNotQuery.pre(pre);
}
if (post != null) {
spanNotQuery.post(post);
}
spanNotQuery.boost(boost);
spanNotQuery.queryName(queryName);
return Optional.of(spanNotQuery);
}
@Override
protected Query doToQuery(QueryShardContext context) throws IOException {
Query includeQuery = this.include.toQuery(context);
assert includeQuery instanceof SpanQuery;
Query excludeQuery = this.exclude.toQuery(context);
assert excludeQuery instanceof SpanQuery;
return new SpanNotQuery((SpanQuery) includeQuery, (SpanQuery) excludeQuery, pre, post);
}
@Override
protected int doHashCode() {
return Objects.hash(include, exclude, pre, post);
}
@Override
protected boolean doEquals(SpanNotQueryBuilder other) {
return Objects.equals(include, other.include) &&
Objects.equals(exclude, other.exclude) &&
(pre == other.pre) &&
(post == other.post);
}
@Override
public String getWriteableName() {
return NAME;
}
}