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/*
* Copyright (C) 2014 Stratio (http://stratio.com)
*
* 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.stratio.cassandra.lucene.search.condition;
import com.google.common.base.MoreObjects;
import com.stratio.cassandra.lucene.IndexException;
import com.stratio.cassandra.lucene.schema.mapping.DateRangeMapper;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.search.Query;
import org.apache.lucene.spatial.SpatialStrategy;
import org.apache.lucene.spatial.prefix.tree.NumberRangePrefixTree.NRShape;
import org.apache.lucene.spatial.query.SpatialArgs;
import org.apache.lucene.spatial.query.SpatialOperation;
import java.util.Date;
/**
* A {@link Condition} implementation that matches a field within an range of values.
*
* @author Andres de la Pena {@literal }
*/
public class DateRangeCondition extends SingleMapperCondition {
/** The default from value. */
public static final Date DEFAULT_FROM = new Date(Long.MIN_VALUE);
/** The default to value. */
public static final Date DEFAULT_TO = new Date(Long.MAX_VALUE);
/** The default operation. */
public static final String DEFAULT_OPERATION = "intersects";
/** The lower accepted value. Maybe null meaning no lower limit. */
public final Object from;
/** The upper accepted value. Maybe null meaning no upper limit. */
public final Object to;
/** The spatial operation to be performed. */
public final String operation;
/**
* Constructs a query selecting all fields greater/equal than {@code from} but less/equal than {@code to}.
*
* If an endpoint is null, it is said to be "open". Either or both endpoints may be open. Open endpoints may not be
* exclusive (you can't select all but the first or last term without explicitly specifying the term to exclude.)
*
* @param boost The boost for this query clause. Documents matching this clause will (in addition to the normal
* weightings) have their score multiplied by {@code boost}.
* @param field the name of the field to be matched
* @param from the lower accepted {@link Date}. Maybe {@code null} meaning no lower limit
* @param to the upper accepted {@link Date}. Maybe {@code null} meaning no upper limit
* @param operation the spatial operation to be performed
*/
public DateRangeCondition(Float boost, String field, Object from, Object to, String operation) {
super(boost, field, DateRangeMapper.class);
this.from = from == null ? DEFAULT_FROM : from;
this.to = to == null ? DEFAULT_TO : to;
this.operation = operation == null ? DEFAULT_OPERATION : operation;
}
/** {@inheritDoc} */
@Override
public Query doQuery(DateRangeMapper mapper, Analyzer analyzer) {
SpatialStrategy strategy = mapper.strategy;
Date fromDate = mapper.base(from);
Date toDate = mapper.base(to);
NRShape shape = mapper.makeShape(fromDate, toDate);
SpatialOperation spatialOperation = parseSpatialOperation(operation);
SpatialArgs args = new SpatialArgs(spatialOperation, shape);
return strategy.makeQuery(args);
}
/**
* Returns the {@link SpatialOperation} representing the specified {@code String}.
*
* @param operation a {@code String} representing a {@link SpatialOperation}
* @return the {@link SpatialOperation} representing the specified {@code String}
*/
static SpatialOperation parseSpatialOperation(String operation) {
if (operation == null) {
throw new IndexException("Operation is required");
} else if (operation.equalsIgnoreCase("is_within")) {
return SpatialOperation.IsWithin;
} else if (operation.equalsIgnoreCase("contains")) {
return SpatialOperation.Contains;
} else if (operation.equalsIgnoreCase("intersects")) {
return SpatialOperation.Intersects;
} else {
throw new IndexException("Operation is invalid: {}", operation);
}
}
/**
* {@inheritDoc}
*/
@Override
public MoreObjects.ToStringHelper toStringHelper() {
return toStringHelper(this).add("from", from).add("to", to).add("operation", operation);
}
}