com.noorq.casser.mapping.convert.CamelCaseToUnderscoreConverter.java Source code

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Here is the source code for com.noorq.casser.mapping.convert.CamelCaseToUnderscoreConverter.java

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/*
 *      Copyright (C) 2015 Noorq, 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 com.noorq.casser.mapping.convert;

import java.util.function.Function;

import com.google.common.base.CaseFormat;

public enum CamelCaseToUnderscoreConverter implements Function<String, String> {

    INSTANCE;

    @Override
    public String apply(String source) {

        if (source == null) {
            throw new IllegalArgumentException("empty parameter");
        }

        return CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, source);
    }

}