net.conquiris.search.DefaultSearcherService.java Source code

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Here is the source code for net.conquiris.search.DefaultSearcherService.java

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/*
 * Copyright (C) the original author or authors.
 *
 * 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 net.conquiris.search;

import static com.google.common.base.Preconditions.checkNotNull;

import java.io.IOException;

import net.conquiris.api.search.ReaderSupplier;
import net.conquiris.api.search.Searcher;
import net.conquiris.api.search.SearcherService;

import org.apache.lucene.search.IndexSearcher;

import com.google.common.base.Function;

/**
 * Default searcher implementation, based on a single index searcher that it's never closed by this
 * object.
 * @author Andres Rodriguez
 */
final class DefaultSearcherService extends AbstractSearcher implements SearcherService {
    /** Reader supplier to use. */
    private final ReaderSupplier supplier;

    /** Constructor. */
    DefaultSearcherService(ReaderSupplier supplier) {
        this.supplier = checkNotNull(supplier, "The reader supplier must be provided");
    }

    /*
     * (non-Javadoc)
     * @see net.conquiris.api.search.SearcherService#search(com.google.common.base.Function)
     */
    @Override
    public <T> T search(final Function<Searcher, T> query) {
        checkNotNull(query, "The complex query to perform must be provided");
        return perform(new Op<T>() {
            @Override
            T perform(IndexSearcher searcher) throws Exception {
                return query.apply(Searchers.of(searcher));
            }
        });
    }

    /*
     * (non-Javadoc)
     * @see net.conquiris.search.AbstractSearcher#getIndexSearcher()
     */
    IndexSearcher getIndexSearcher() {
        return new IndexSearcher(supplier.get().get());
    }

    /*
     * (non-Javadoc)
     * @see
     * net.conquiris.search.AbstractSearcher#disposeIndexSearcher(org.apache.lucene.search.IndexSearcher
     * )
     */
    void disposeIndexSearcher(IndexSearcher searcher) {
        try {
            searcher.close();
        } catch (IOException e) {
            // TODO: log
        }
        try {
            searcher.getIndexReader().close();
        } catch (IOException e) {
            // TODO: log
        }
    }
}