org.apache.solr.search.PayloadCheckQParserPlugin.java Source code

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Here is the source code for org.apache.solr.search.PayloadCheckQParserPlugin.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.solr.search;

import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.util.ArrayList;
import java.util.List;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.payloads.FloatEncoder;
import org.apache.lucene.analysis.payloads.IdentityEncoder;
import org.apache.lucene.analysis.payloads.IntegerEncoder;
import org.apache.lucene.analysis.payloads.PayloadEncoder;
import org.apache.lucene.queries.payloads.SpanPayloadCheckQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.util.BytesRef;
import org.apache.solr.common.SolrException;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.schema.FieldType;
import org.apache.solr.util.PayloadUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class PayloadCheckQParserPlugin extends QParserPlugin {
    public static final String NAME = "payload_check";

    private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

    @Override
    public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {

        return new QParser(qstr, localParams, params, req) {
            @Override
            public Query parse() throws SyntaxError {
                String field = localParams.get(QueryParsing.F);
                String value = localParams.get(QueryParsing.V);
                String p = localParams.get("payloads");

                if (field == null) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "'f' not specified");
                }

                if (value == null) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "query string missing");
                }

                if (p == null) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "'payloads' not specified");
                }

                FieldType ft = req.getCore().getLatestSchema().getFieldType(field);
                Analyzer analyzer = ft.getQueryAnalyzer();
                SpanQuery query = null;
                try {
                    query = PayloadUtils.createSpanQuery(field, value, analyzer);
                } catch (IOException e) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, e);
                }

                if (query == null) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "SpanQuery is null");
                }

                PayloadEncoder encoder = null;
                String e = PayloadUtils.getPayloadEncoder(ft);
                if ("float".equals(e)) { // TODO: centralize this string->PayloadEncoder logic (see DelimitedPayloadTokenFilterFactory)
                    encoder = new FloatEncoder();
                } else if ("integer".equals(e)) {
                    encoder = new IntegerEncoder();
                } else if ("identity".equals(e)) {
                    encoder = new IdentityEncoder();
                }

                if (encoder == null) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST,
                            "invalid encoder: " + e + " for field: " + field);
                }

                List<BytesRef> payloads = new ArrayList<>();
                String[] rawPayloads = p.split(" "); // since payloads (most likely) came in whitespace delimited, just split
                for (String rawPayload : rawPayloads) {
                    if (rawPayload.length() > 0)
                        payloads.add(encoder.encode(rawPayload.toCharArray()));
                }

                return new SpanPayloadCheckQuery(query, payloads);
            }
        };

    }
}