com.orientechnologies.lucene.builder.OQueryBuilderImpl.java Source code

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Here is the source code for com.orientechnologies.lucene.builder.OQueryBuilderImpl.java

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/*
 *
 *  * Copyright 2014 Orient Technologies.
 *  *
 *  * 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.orientechnologies.lucene.builder;

import com.orientechnologies.common.log.OLogManager;
import com.orientechnologies.orient.core.index.OCompositeKey;
import com.orientechnologies.orient.core.index.OIndexDefinition;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.sql.parser.ParseException;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.Query;

import java.util.Map;

/**
 * Created by Enrico Risa on 02/09/15.
 */
public class OQueryBuilderImpl implements OQueryBuilder {

    private final boolean allowLeadingWildcard;
    private final boolean lowercaseExpandedTerms;

    public OQueryBuilderImpl(ODocument metadata) {

        Boolean allowLeadingWildcard = false;
        if (metadata.containsField("allowLeadingWildcard")) {
            allowLeadingWildcard = metadata.<Boolean>field("allowLeadingWildcard");
        }

        Boolean lowercaseExpandedTerms = true;
        if (metadata.containsField("lowercaseExpandedTerms")) {
            lowercaseExpandedTerms = metadata.<Boolean>field("lowercaseExpandedTerms");
        }
        this.allowLeadingWildcard = allowLeadingWildcard;
        this.lowercaseExpandedTerms = lowercaseExpandedTerms;

    }

    public OQueryBuilderImpl(boolean allowLeadingWildcard, boolean lowercaseExpandedTerms) {
        this.allowLeadingWildcard = allowLeadingWildcard;
        this.lowercaseExpandedTerms = lowercaseExpandedTerms;

        OLogManager.instance().info(this, "allowLeadingWildcard::  " + allowLeadingWildcard);
    }

    @Override
    public Query query(OIndexDefinition index, Object key, Analyzer analyzer) throws ParseException {
        String query = "";
        if (key instanceof OCompositeKey) {
            Object params = ((OCompositeKey) key).getKeys().get(0);
            if (params instanceof Map) {
                Object q = ((Map) params).get("q");
                if (q != null) {
                    query = q.toString();
                }
            } else {
                query = params.toString();

            }
        } else {
            query = key.toString();
        }

        return getQueryParser(index, query, analyzer);
    }

    protected Query getQueryParser(OIndexDefinition index, String key, Analyzer analyzer) throws ParseException {
        QueryParser queryParser;
        if ((key).startsWith("(")) {
            queryParser = new QueryParser("", analyzer);

        } else {
            String[] fields = null;
            if (index.isAutomatic()) {
                fields = index.getFields().toArray(new String[index.getFields().size()]);
            } else {
                int length = index.getTypes().length;

                fields = new String[length];
                for (int i = 0; i < length; i++) {
                    fields[i] = "k" + i;
                }
            }

            queryParser = new MultiFieldQueryParser(fields, analyzer);
        }

        queryParser.setAllowLeadingWildcard(allowLeadingWildcard);

        queryParser.setLowercaseExpandedTerms(lowercaseExpandedTerms);

        try {
            return queryParser.parse(key);

        } catch (org.apache.lucene.queryparser.classic.ParseException e) {
            throw new ParseException(e.getMessage());
        }

    }

}