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Diffstat (limited to 'src/main/java/org/elasticsearch/index/query/WildcardQueryBuilder.java')
| -rw-r--r-- | src/main/java/org/elasticsearch/index/query/WildcardQueryBuilder.java | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/main/java/org/elasticsearch/index/query/WildcardQueryBuilder.java b/src/main/java/org/elasticsearch/index/query/WildcardQueryBuilder.java new file mode 100644 index 0000000..a2a2d1a --- /dev/null +++ b/src/main/java/org/elasticsearch/index/query/WildcardQueryBuilder.java @@ -0,0 +1,107 @@ +/* + * 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.elasticsearch.common.xcontent.XContentBuilder; + +import java.io.IOException; + +/** + * Implements the wildcard search query. Supported wildcards are <tt>*</tt>, which + * matches any character sequence (including the empty one), and <tt>?</tt>, + * 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 <tt>*</tt> or + * <tt>?</tt>. + * + * + */ +public class WildcardQueryBuilder extends BaseQueryBuilder implements MultiTermQueryBuilder, BoostableQueryBuilder<WildcardQueryBuilder> { + + private final String name; + + private final String wildcard; + + private float boost = -1; + + private String rewrite; + + private String queryName; + + /** + * Implements the wildcard search query. Supported wildcards are <tt>*</tt>, which + * matches any character sequence (including the empty one), and <tt>?</tt>, + * 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 <tt>*</tt> or + * <tt>?</tt>. + * + * @param name The field name + * @param wildcard The wildcard query string + */ + public WildcardQueryBuilder(String name, String wildcard) { + this.name = name; + this.wildcard = wildcard; + } + + public WildcardQueryBuilder rewrite(String rewrite) { + this.rewrite = rewrite; + return this; + } + + /** + * 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; + } + + /** + * Sets the query name for the filter that can be used when searching for matched_filters per hit. + */ + public WildcardQueryBuilder queryName(String queryName) { + this.queryName = queryName; + return this; + } + + @Override + public void doXContent(XContentBuilder builder, Params params) throws IOException { + builder.startObject(WildcardQueryParser.NAME); + if (boost == -1 && rewrite == null && queryName != null) { + builder.field(name, wildcard); + } else { + builder.startObject(name); + builder.field("wildcard", wildcard); + if (boost != -1) { + builder.field("boost", boost); + } + if (rewrite != null) { + builder.field("rewrite", rewrite); + } + if (queryName != null) { + builder.field("_name", queryName); + } + builder.endObject(); + } + builder.endObject(); + } +}
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