org.grails.datastore.mapping.redis.query.RedisQueryUtils.java Source code

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Here is the source code for org.grails.datastore.mapping.redis.query.RedisQueryUtils.java

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/* Copyright (C) 2010 SpringSource
 *
 * 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.grails.datastore.mapping.redis.query;

import org.springframework.core.convert.ConversionService;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * Internal utility methods for dealing with queries
 *
 * @author Graeme Rocher
 * @since 1.0
 */
public class RedisQueryUtils {

    public static List<Long> transformRedisResults(ConversionService conversionService,
            Collection<String> results) {
        List<Long> returnResults;
        if (!results.isEmpty()) {
            List<Long> foreignKeys = new ArrayList<Long>();
            for (String result : results) {
                foreignKeys.add(conversionService.convert(result, Long.class));
            }
            returnResults = foreignKeys;
        } else {
            returnResults = Collections.emptyList();
        }
        return returnResults;
    }
}