org.apache.gobblin.compliance.utils.PartitionUtils.java Source code

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Here is the source code for org.apache.gobblin.compliance.utils.PartitionUtils.java

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/*
 * 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.
 */
package org.apache.gobblin.compliance.utils;

import java.util.Map;

import com.google.common.base.Preconditions;

import org.apache.gobblin.compliance.ComplianceConfigurationKeys;

/**
 * A utility class for Partition.
 *
 * @author adsharma
 */
public class PartitionUtils {
    private static final String SINGLE_QUOTE = "'";

    /**
     * Add single quotes to the string, if not present.
     * TestString will be converted to 'TestString'
     */
    public static String getQuotedString(String st) {
        Preconditions.checkNotNull(st);
        String quotedString = "";
        if (!st.startsWith(SINGLE_QUOTE)) {
            quotedString += SINGLE_QUOTE;
        }
        quotedString += st;
        if (!st.endsWith(SINGLE_QUOTE)) {
            quotedString += SINGLE_QUOTE;
        }
        return quotedString;
    }

    /**
     * This method returns the partition spec string of the partition.
     * Example : datepartition='2016-01-01-00', size='12345'
     */
    public static String getPartitionSpecString(Map<String, String> spec) {
        StringBuilder sb = new StringBuilder();
        for (Map.Entry<String, String> entry : spec.entrySet()) {
            if (!sb.toString().isEmpty()) {
                sb.append(",");
            }
            sb.append(entry.getKey());
            sb.append("=");
            sb.append(getQuotedString(entry.getValue()));
        }
        return sb.toString();
    }

    /**
     * Check if a given string is a valid unixTimeStamp
     */
    public static boolean isUnixTimeStamp(String timeStamp) {
        if (timeStamp.length() != ComplianceConfigurationKeys.TIME_STAMP_LENGTH) {
            return false;
        }
        try {
            Long.parseLong(timeStamp);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }
}