co.cask.hydrator.plugin.common.CubeUtils.java Source code

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Here is the source code for co.cask.hydrator.plugin.common.CubeUtils.java

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/*
 * Copyright  2016 Cask Data, Inc.
 *
 * 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 co.cask.hydrator.plugin.common;

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

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Utility class for usage by batch and real-time cube sinks.
 */
public final class CubeUtils {

    private CubeUtils() {
        throw new AssertionError("Should not instantiate static utility class.");
    }

    public static Map<String, String> parseAndGetProperties(String property, String propertyValue, String delimiter,
            String fieldDelimiter, Function<String, String> keyFunction) {
        Map<String, String> result = new HashMap<>();
        List<String> fieldGroups = Arrays.asList(propertyValue.split(delimiter));
        for (String group : fieldGroups) {
            String[] split = group.split(fieldDelimiter);
            if (split.length != 2) {
                //should not happen
                throw new IllegalArgumentException(
                        String.format("For Property {} Parameter {} , name or value is empty, please check config",
                                property, group));
            }
            if (Strings.isNullOrEmpty(split[0])) {
                throw new IllegalArgumentException(String.format("Empty key/value is not allowed in {}", property));
            }
            if (Strings.isNullOrEmpty(split[1])) {
                throw new IllegalArgumentException(String.format("Empty key/value is not allowed in {}", property));
            }
            result.put(keyFunction.apply(split[0]), split[1]);
        }
        return result;
    }
}