com.orientechnologies.lucene.collections.OLuceneAbstractResultSet Maven / Gradle / Ivy

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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.collections;

import com.orientechnologies.common.log.OLogManager;
import com.orientechnologies.lucene.engine.OLuceneIndexEngine;
import com.orientechnologies.lucene.engine.OLuceneIndexEngineAbstract;
import com.orientechnologies.lucene.query.QueryContext;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;

import java.io.IOException;
import java.util.Collection;
import java.util.Set;

/**
 * Created by Enrico Risa on 16/09/15.
 */
public abstract class OLuceneAbstractResultSet implements Set {

    protected static Integer PAGE_SIZE = 10000;
    protected final String indexName;
    protected TopDocs topDocs;
    protected Query query;
    protected OLuceneIndexEngine manager;
    protected QueryContext queryContext;

    public OLuceneAbstractResultSet(OLuceneIndexEngine manager, QueryContext queryContext) {
        this.manager = manager;
        this.queryContext = queryContext;
        this.query = enhanceQuery(queryContext.query);

        indexName = manager.indexName();
        fetchFirstBatch();
    }

    protected Query enhanceQuery(Query query) {
        return query;
    }

    protected void fetchFirstBatch() {
        try {

            switch (queryContext.cfg) {

                case NO_FILTER_NO_SORT:
                    topDocs = queryContext.getSearcher().search(query, PAGE_SIZE);
                    break;
                case FILTER_SORT:
                    topDocs = queryContext.getSearcher().search(query, queryContext.filter, PAGE_SIZE, queryContext.sort);
                    break;
                case FILTER:
                    topDocs = queryContext.getSearcher().search(query, queryContext.filter, PAGE_SIZE);
                    break;
                case SORT:
                    topDocs = queryContext.getSearcher().search(query, PAGE_SIZE, queryContext.sort);
                    break;
            }
        } catch (IOException e) {
            OLogManager.instance().error(this, "Error on fetching document by query '%s' to Lucene index", e, query);
        }
    }

    @Override
    public boolean isEmpty() {
        return size() == 0;
    }

    @Override
    public boolean contains(Object o) {
        throw new UnsupportedOperationException();
    }

    @Override
    public  T[] toArray(T[] a) {
        throw new UnsupportedOperationException();
    }

    @Override
    public Object[] toArray() {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean add(OIdentifiable oIdentifiable) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean remove(Object o) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean containsAll(Collection c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean addAll(Collection c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean retainAll(Collection c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean removeAll(Collection c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void clear() {
        throw new UnsupportedOperationException();
    }

    public void sendLookupTime(OCommandContext commandContext, long start) {
        OLuceneIndexEngineAbstract.sendLookupTime(indexName, commandContext, topDocs, -1, start);
    }
}