package org.apache.lucene.queryParser.standard.builders;

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.lucene.queryParser.core.QueryNodeException;
import org.apache.lucene.queryParser.core.nodes.ParametricQueryNode;
import org.apache.lucene.queryParser.core.nodes.QueryNode;
import org.apache.lucene.queryParser.core.nodes.ParametricQueryNode.CompareOperator;
import org.apache.lucene.queryParser.standard.config.MultiTermRewriteMethodAttribute;
import org.apache.lucene.queryParser.standard.nodes.RangeQueryNode;
import org.apache.lucene.search.MultiTermQuery;
import org.apache.lucene.search.TermRangeQuery;

/**
 * Builds a {@link TermRangeQuery} object from a {@link RangeQueryNode} object.
 */
public class RangeQueryNodeBuilder implements StandardQueryBuilder {

  public RangeQueryNodeBuilder() {
    // empty constructor
  }

  public TermRangeQuery build(QueryNode queryNode) throws QueryNodeException {
    RangeQueryNode rangeNode = (RangeQueryNode) queryNode;
    ParametricQueryNode upper = rangeNode.getUpperBound();
    ParametricQueryNode lower = rangeNode.getLowerBound();

    boolean lowerInclusive = false;
    boolean upperInclusive = false;

    if (upper.getOperator() == CompareOperator.LE) {
      upperInclusive = true;
    }

    if (lower.getOperator() == CompareOperator.GE) {
      lowerInclusive = true;
    }

    String field = rangeNode.getField().toString();

    TermRangeQuery rangeQuery = new TermRangeQuery(field, lower
        .getTextAsString(), upper.getTextAsString(), lowerInclusive,
        upperInclusive, rangeNode.getCollator());
    
    MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.getTag(MultiTermRewriteMethodAttribute.TAG_ID);
    if (method != null) {
      rangeQuery.setRewriteMethod(method);
    }

    return rangeQuery;

  }

}