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There is a newer version: 1.4.0

/*
 * Copyright (c) 2008-2017 akquinet tech@spree GmbH
 *
 * This file is part of Hibersap.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.hibersap.generation.bapi;

public final class BapiFormatHelper {

    private BapiFormatHelper() {
        // should not be instantiated
    }

    public static String getCamelCaseSmall(final String sapName) {
        StringBuilder result = new StringBuilder("_");

        if (sapName == null) {
            return result.toString();
        }

        String[] parts = sapName.split("_");
        for (int i = 0; i < parts.length; i++) {
            if (i == 0) {
                result.append(parts[i].toLowerCase());
            } else {
                result.append(parts[i].substring(0, 1).toUpperCase());
                result.append(parts[i].substring(1).toLowerCase());
            }
        }
        return result.toString();
    }

    public static String getCamelCaseBig(final String sapName) {
        StringBuilder result = new StringBuilder("");

        if (sapName == null) {
            return result.toString();
        }

        String[] parts = sapName.split("_");
        for (String part : parts) {
            if (part.length() > 0) {
                result.append(part.substring(0, 1).toUpperCase());
                result.append(part.substring(1).toLowerCase());
            }
        }
        return result.toString();
    }
}