org.elasticsearch.index.query.xcontent.WildcardQueryBuilder 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 Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.xcontent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
/**
* Implements the wildcard search query. Supported wildcards are *, which
* matches any character sequence (including the empty one), and ?,
* which matches any single character. Note this query can be slow, as it
* needs to iterate over many terms. In order to prevent extremely slow WildcardQueries,
* a Wildcard term should not start with one of the wildcards * or
* ?.
*
* @author kimchy (shay.banon)
*/
public class WildcardQueryBuilder extends BaseQueryBuilder {
private final String name;
private final String wildcard;
private float boost = -1;
/**
* Implements the wildcard search query. Supported wildcards are *, which
* matches any character sequence (including the empty one), and ?,
* which matches any single character. Note this query can be slow, as it
* needs to iterate over many terms. In order to prevent extremely slow WildcardQueries,
* a Wildcard term should not start with one of the wildcards * or
* ?.
*
* @param name The field name
* @param wildcard The wildcard query string
*/
public WildcardQueryBuilder(String name, String wildcard) {
this.name = name;
this.wildcard = wildcard;
}
/**
* Sets the boost for this query. Documents matching this query will (in addition to the normal
* weightings) have their score multiplied by the boost provided.
*/
public WildcardQueryBuilder boost(float boost) {
this.boost = boost;
return this;
}
@Override public void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(WildcardQueryParser.NAME);
if (boost == -1) {
builder.field(name, wildcard);
} else {
builder.startObject(name);
builder.field("wildcard", wildcard);
builder.field("boost", boost);
builder.endObject();
}
builder.endObject();
}
}