LuceneSearchEngineBooleanQueryFilterBuilder.java

/*
 * Copyright 2004-2009 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 org.compass.core.lucene.engine.query;

import java.util.ArrayList;

import org.apache.lucene.search.Filter;
import org.compass.core.engine.SearchEngineQueryFilter;
import org.compass.core.engine.SearchEngineQueryFilterBuilder;
import org.compass.core.lucene.engine.LuceneSearchEngineQueryFilter;
import org.compass.core.lucene.support.ChainedFilter;

/**
 * @author kimchy
 */
public class LuceneSearchEngineBooleanQueryFilterBuilder implements SearchEngineQueryFilterBuilder.SearchEngineBooleanQueryFilterBuilder {

    private ArrayList<Integer> types = new ArrayList<Integer>();

    private ArrayList<Filter> filters = new ArrayList<Filter>();

    public LuceneSearchEngineBooleanQueryFilterBuilder() {

    }

    public void and(SearchEngineQueryFilter filter) {
        types.add(ChainedFilter.AND);
        filters.add(((LuceneSearchEngineQueryFilter) filter).getFilter());
    }

    public void or(SearchEngineQueryFilter filter) {
        types.add(ChainedFilter.OR);
        filters.add(((LuceneSearchEngineQueryFilter) filter).getFilter());
    }

    public void andNot(SearchEngineQueryFilter filter) {
        types.add(ChainedFilter.ANDNOT);
        filters.add(((LuceneSearchEngineQueryFilter) filter).getFilter());
    }

    public void xor(SearchEngineQueryFilter filter) {
        types.add(ChainedFilter.XOR);
        filters.add(((LuceneSearchEngineQueryFilter) filter).getFilter());
    }

    public SearchEngineQueryFilter toFilter() {
        if (filters.size() == 0) {
            throw new IllegalArgumentException("Must add at least one filter");
        }
        Filter[] filtersArr = filters.toArray(new Filter[filters.size()]);
        int[] typesArr = new int[types.size()];
        for (int i = 0; i < typesArr.length; i++) {
            typesArr[i] = types.get(i);
        }
        return new LuceneSearchEngineQueryFilter(new ChainedFilter(filtersArr, typesArr));
    }
}