org.elasticsearch.index.query.FieldMaskingSpanQueryBuilder 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.FieldMaskingSpanQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.Strings;
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 org.elasticsearch.index.mapper.MappedFieldType;
import java.io.IOException;
import java.util.Objects;
public class FieldMaskingSpanQueryBuilder extends AbstractQueryBuilder implements SpanQueryBuilder {
public static final String NAME = "field_masking_span";
private static final ParseField FIELD_FIELD = new ParseField("field");
private static final ParseField QUERY_FIELD = new ParseField("query");
private final SpanQueryBuilder queryBuilder;
private final String fieldName;
/**
* Constructs a new {@link FieldMaskingSpanQueryBuilder} given an inner {@link SpanQueryBuilder} for
* a given field
* @param queryBuilder inner {@link SpanQueryBuilder}
* @param fieldName the field name
*/
public FieldMaskingSpanQueryBuilder(SpanQueryBuilder queryBuilder, String fieldName) {
if (Strings.isEmpty(fieldName)) {
throw new IllegalArgumentException("field name is null or empty");
}
if (queryBuilder == null) {
throw new IllegalArgumentException("inner clause [query] cannot be null.");
}
this.queryBuilder = queryBuilder;
this.fieldName = fieldName;
}
/**
* Read from a stream.
*/
public FieldMaskingSpanQueryBuilder(StreamInput in) throws IOException {
super(in);
queryBuilder = (SpanQueryBuilder) in.readNamedWriteable(QueryBuilder.class);
fieldName = in.readString();
}
@Override
protected void doWriteTo(StreamOutput out) throws IOException {
out.writeNamedWriteable(queryBuilder);
out.writeString(fieldName);
}
/**
* @return the field name for this query
*/
public String fieldName() {
return this.fieldName;
}
/**
* @return the inner {@link QueryBuilder}
*/
public SpanQueryBuilder innerQuery() {
return this.queryBuilder;
}
@Override
protected void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(NAME);
builder.field(QUERY_FIELD.getPreferredName());
queryBuilder.toXContent(builder, params);
builder.field(FIELD_FIELD.getPreferredName(), fieldName);
printBoostAndQueryName(builder);
builder.endObject();
}
public static FieldMaskingSpanQueryBuilder fromXContent(XContentParser parser) throws IOException {
float boost = AbstractQueryBuilder.DEFAULT_BOOST;
SpanQueryBuilder inner = null;
String field = 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 (QUERY_FIELD.match(currentFieldName)) {
QueryBuilder query = parseInnerQueryBuilder(parser);
if (query instanceof SpanQueryBuilder == false) {
throw new ParsingException(parser.getTokenLocation(), "[field_masking_span] query must be of type span query");
}
inner = (SpanQueryBuilder) query;
} else {
throw new ParsingException(parser.getTokenLocation(), "[field_masking_span] query does not support ["
+ currentFieldName + "]");
}
} else {
if (AbstractQueryBuilder.BOOST_FIELD.match(currentFieldName)) {
boost = parser.floatValue();
} else if (FIELD_FIELD.match(currentFieldName)) {
field = parser.text();
} else if (AbstractQueryBuilder.NAME_FIELD.match(currentFieldName)) {
queryName = parser.text();
} else {
throw new ParsingException(parser.getTokenLocation(),
"[field_masking_span] query does not support [" + currentFieldName + "]");
}
}
}
if (inner == null) {
throw new ParsingException(parser.getTokenLocation(), "field_masking_span must have [query] span query clause");
}
if (field == null) {
throw new ParsingException(parser.getTokenLocation(), "field_masking_span must have [field] set for it");
}
FieldMaskingSpanQueryBuilder queryBuilder = new FieldMaskingSpanQueryBuilder(inner, field);
queryBuilder.boost(boost);
queryBuilder.queryName(queryName);
return queryBuilder;
}
@Override
protected SpanQuery doToQuery(QueryShardContext context) throws IOException {
String fieldInQuery = fieldName;
MappedFieldType fieldType = context.fieldMapper(fieldName);
if (fieldType != null) {
fieldInQuery = fieldType.name();
}
Query innerQuery = queryBuilder.toQuery(context);
assert innerQuery instanceof SpanQuery;
return new FieldMaskingSpanQuery((SpanQuery)innerQuery, fieldInQuery);
}
@Override
protected int doHashCode() {
return Objects.hash(queryBuilder, fieldName);
}
@Override
protected boolean doEquals(FieldMaskingSpanQueryBuilder other) {
return Objects.equals(queryBuilder, other.queryBuilder) &&
Objects.equals(fieldName, other.fieldName);
}
@Override
public String getWriteableName() {
return NAME;
}
}