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Apache Commons Text is a library focused on algorithms working on strings.
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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.commons.text.lookup;

import org.apache.commons.lang3.StringUtils;

/**
 * A default lookup for others to extend in this package.
 *
 * @since 1.3
 */
abstract class AbstractStringLookup implements StringLookup {

    /**
     * The default split char.
     */
    protected static final char SPLIT_CH = ':';

    /**
     * The default split string.
     */
    protected static final String SPLIT_STR = String.valueOf(SPLIT_CH);

    /**
     * Creates a lookup key for a given file and key.
     */
    static String toLookupKey(final String left, final String right) {
        return toLookupKey(left, SPLIT_STR, right);
    }

    /**
     * Creates a lookup key for a given file and key.
     */
    static String toLookupKey(final String left, final String separator, final String right) {
        return left + separator + right;
    }

    /**
     * Returns the substring after the first occurrence of {@code ch} in {@code value}.
     *
     * @param value The source string.
     * @param ch The character to search.
     * @return a new string.
     * @deprecated Use {@link StringUtils#substringAfter(String, int)}.
     */
    @Deprecated
    protected String substringAfter(final String value, final char ch) {
        return StringUtils.substringAfter(value, ch);
    }

    /**
     * Returns the substring after the first occurrence of {@code str} in {@code value}.
     *
     * @param value The source string.
     * @param str The string to search.
     * @return a new string.
     * @deprecated Use {@link StringUtils#substringAfter(String, String)}.
     */
    @Deprecated
    protected String substringAfter(final String value, final String str) {
        return StringUtils.substringAfter(value, str);
    }

    /**
     * Returns the substring after the first occurrence of {@code ch} in {@code value}.
     *
     * @param value The source string.
     * @param ch The character to search.
     * @return a new string.
     * @deprecated Use {@link StringUtils#substringAfterLast(String, int)}.
     */
    @Deprecated
    protected String substringAfterLast(final String value, final char ch) {
        return StringUtils.substringAfterLast(value, ch);
    }

}