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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.util;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.stream.Collectors;
import org.apache.commons.lang3.StringUtils;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableMap;
/**
* A utility class for {@link Properties} objects.
*/
public class PropertiesUtils {
private static final Splitter LIST_SPLITTER = Splitter.on(",").trimResults().omitEmptyStrings();
/**
* Combine a variable number of {@link Properties} into a single {@link Properties}.
*/
public static Properties combineProperties(Properties... properties) {
Properties combinedProperties = new Properties();
for (Properties props : properties) {
combinedProperties.putAll(props);
}
return combinedProperties;
}
/**
* Converts a {@link Properties} object to a {@link Map} where each key is a {@link String}.
*/
public static Map propsToStringKeyMap(Properties properties) {
ImmutableMap.Builder mapBuilder = ImmutableMap.builder();
for (Map.Entry