monasca.api.infrastructure.persistence.DimensionQueries.java Source code

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Here is the source code for monasca.api.infrastructure.persistence.DimensionQueries.java

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/*
 * Copyright (c) 2014,2016 Hewlett Packard Enterprise Development Company, L.P.
 * 
 * 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 monasca.api.infrastructure.persistence;

import com.google.common.base.Splitter;
import com.google.common.base.Strings;

import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.skife.jdbi.v2.Query;

/**
 * Utilities for building dimension queries.
 *
 * This class has issues with testing with mockito because bind method on Query class is final.
 */
public final class DimensionQueries {

    private DimensionQueries() {
    }

    public static void bindDimensionsToQuery(Query<?> query, Map<String, String> dimensions) {

        if (dimensions != null) {
            int i = 0;
            for (Iterator<Map.Entry<String, String>> it = dimensions.entrySet().iterator(); it.hasNext(); i++) {
                Map.Entry<String, String> entry = it.next();
                query.bind("dname" + i, entry.getKey());
                if (!Strings.isNullOrEmpty(entry.getValue())) {
                    List<String> values = Splitter.on('|').splitToList(entry.getValue());
                    int j = 0;
                    for (String value : values) {
                        query.bind("dvalue" + i + '_' + j, value);
                        j++;
                    }
                }
            }
        }
    }

    public static Map<String, String> dimensionsFor(String dimensionSet) {

        Map<String, String> dimensions = Collections.emptyMap();

        if (dimensionSet != null) {
            dimensions = new HashMap<>();
            for (String kvStr : dimensionSet.split(",")) {
                String[] kv = kvStr.split("=");
                if (kv.length > 1)
                    dimensions.put(kv[0], kv[1]);
            }
        }

        return dimensions;
    }
}