com.xiaomi.linden.core.search.query.QueryConstructor.java Source code

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Here is the source code for com.xiaomi.linden.core.search.query.QueryConstructor.java

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// Copyright 2016 Xiaomi, Inc.
//
// Licensed 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 com.xiaomi.linden.core.search.query;

import java.io.IOException;

import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.util.BytesRef;

import com.xiaomi.linden.core.LindenConfig;
import com.xiaomi.linden.core.search.query.model.LindenScoreQuery;
import com.xiaomi.linden.thrift.common.LindenQuery;

abstract public class QueryConstructor {

    private static final QueryConstructor TERM_QUERY_CONSTRUCTOR = new TermQueryConstructor();
    private static final QueryConstructor BOOLEAN_QUERY_CONSTRUCTOR = new BooleanQueryConstructor();
    private static final QueryConstructor FLEXIBLE_QUERY_CONSTRUCTOR = new FlexibleQueryConstructor();
    private static final QueryConstructor MATCH_ALL_QUERY_CONSTRUCTOR = new MatchAllQueryConstructor();
    private static final QueryConstructor QUERY_STRING_QUERY_CONSTRUCTOR = new QueryStringQueryConstructor();
    private static final QueryConstructor RANGE_QUERY_CONSTRUCTOR = new RangeQueryConstructor();
    private static final QueryConstructor DIS_MAX_QUERY_CONSTRUCTOR = new DisMaxQueryConstructor();
    private static final QueryConstructor FILTERED_QUERY_CONSTRUCTOR = new FilteredQueryConstructor();
    private static final QueryConstructor WILDCARD_QUERY_CONSTRUCTOR = new WildcardQueryConstructor();

    public static Query constructQuery(LindenQuery lindenQuery, LindenConfig config) throws Exception {
        if (lindenQuery == null) {
            return new MatchAllDocsQuery();
        }

        Query query;
        if (lindenQuery.isSetTermQuery()) {
            query = TERM_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetBooleanQuery()) {
            query = BOOLEAN_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetFlexQuery()) {
            query = FLEXIBLE_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetMatchAllQuery()) {
            query = MATCH_ALL_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetRangeQuery()) {
            query = RANGE_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetQueryString()) {
            query = QUERY_STRING_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetDisMaxQuery()) {
            query = DIS_MAX_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetFilteredQuery()) {
            query = FILTERED_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else if (lindenQuery.isSetWildcardQuery()) {
            query = WILDCARD_QUERY_CONSTRUCTOR.construct(lindenQuery, config);
        } else {
            throw new IOException("Need query detail.");
        }

        if (lindenQuery.isSetBoost()) {
            query.setBoost(query.getBoost() * (float) lindenQuery.getBoost());
        }

        if (lindenQuery.isSetScoreModel()) {
            return new LindenScoreQuery(query, lindenQuery.getScoreModel(), config);
        }
        return query;
    }

    protected abstract Query construct(LindenQuery lindenQuery, LindenConfig config) throws Exception;

    public static Integer intVal(String val) {
        return val == null ? null : Integer.valueOf(val);
    }

    public static Float floatVal(String val) {
        return val == null ? null : Float.valueOf(val);
    }

    public static Long longVal(String val) {
        return val == null ? null : Long.valueOf(val);
    }

    public static Double doubleVal(String val) {
        return val == null ? null : Double.valueOf(val);
    }

    public static BytesRef bytesRefVal(String val) {
        return val == null ? null : new BytesRef(val);
    }
}