at.ac.univie.mminf.luceneSKOS.queryparser.flexible.standard.SKOSStandardQueryParser.java Source code

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Here is the source code for at.ac.univie.mminf.luceneSKOS.queryparser.flexible.standard.SKOSStandardQueryParser.java

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package at.ac.univie.mminf.luceneSKOS.queryparser.flexible.standard;

/**
 * Copyright 2012 Flavio Martins 
 *
 * 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.
 */

import java.util.HashMap;
import java.util.Map;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorPipeline;
import org.apache.lucene.queryparser.flexible.standard.StandardQueryParser;
import org.apache.lucene.queryparser.flexible.standard.processors.AnalyzerQueryNodeProcessor;

import at.ac.univie.mminf.luceneSKOS.analysis.tokenattributes.SKOSTypeAttribute.SKOSType;
import at.ac.univie.mminf.luceneSKOS.queryparser.flexible.standard.processors.SKOSQueryNodeProcessor;

public class SKOSStandardQueryParser extends StandardQueryParser {

    private Map<SKOSType, Float> boosts = new HashMap<SKOSType, Float>() {
        private static final long serialVersionUID = 1L;
        {
            put(SKOSType.PREF, 0f);
            put(SKOSType.ALT, 0f);
            put(SKOSType.HIDDEN, 0f);
            put(SKOSType.BROADER, 0f);
            put(SKOSType.NARROWER, 0f);
            put(SKOSType.BROADERTRANSITIVE, 0f);
            put(SKOSType.NARROWERTRANSITIVE, 0f);
            put(SKOSType.RELATED, 0f);
        }
    };

    public SKOSStandardQueryParser() {
        super();
    }

    public SKOSStandardQueryParser(Analyzer analyzer) {
        super();
        QueryNodeProcessorPipeline qnpp = ((QueryNodeProcessorPipeline) getQueryNodeProcessor());

        int i = 0;
        for (i = 0; i < qnpp.size(); i++) {
            if (qnpp.get(i) instanceof AnalyzerQueryNodeProcessor) {
                break;
            }
        }
        SKOSQueryNodeProcessor qnp = new SKOSQueryNodeProcessor(analyzer);

        qnpp.add(i, qnp);

        // Set boost map
        qnp.setBoosts(boosts);
    }

    public void setBoosts(Map<SKOSType, Float> boosts) {
        this.boosts = boosts;
    }

    public Map<SKOSType, Float> getBoosts() {
        return boosts;
    }

    public void setBoost(SKOSType skosType, float boost) {
        boosts.put(skosType, boost);
    }

    public float getBoost(String type) {
        if (boosts == null) {
            return 1;
        }

        Float boost = boosts.get(type);

        if (boost != null) {
            return boost;
        }

        return 1;
    }

}