    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.lang3.text.translate;
    018
    019/**
    020 * Translates code points to their Unicode escaped value suitable for Java source.
    021 *
    022 * @since 3.2
    023 * @deprecated As of 3.6, use Apache Commons Text
    024 * <a href="https://commons.apache.org/proper/commons-text/javadocs/api-release/org/apache/commons/text/translate/UnicodeEscaper.html">
    025 * UnicodeEscaper</a> instead
    026 */
    027@Deprecated
    028public class JavaUnicodeEscaper extends UnicodeEscaper {
    029
    030    /**
    031     * Constructs a {@link JavaUnicodeEscaper} above the specified value (exclusive).
    032     *
    033     * @param codePoint
    034     *            above which to escape
    035     * @return the newly created {@link UnicodeEscaper} instance
    036     */
    037    public static JavaUnicodeEscaper above(final int codePoint) {
    038        return outsideOf(0, codePoint);
    039    }
    040
    041    /**
    042     * Constructs a {@link JavaUnicodeEscaper} below the specified value (exclusive).
    043     *
    044     * @param codePoint
    045     *            below which to escape
    046     * @return the newly created {@link UnicodeEscaper} instance
    047     */
    048    public static JavaUnicodeEscaper below(final int codePoint) {
    049        return outsideOf(codePoint, Integer.MAX_VALUE);
    050    }
    051
    052    /**
    053     * Constructs a {@link JavaUnicodeEscaper} between the specified values (inclusive).
    054     *
    055     * @param codePointLow
    056     *            above which to escape
    057     * @param codePointHigh
    058     *            below which to escape
    059     * @return the newly created {@link UnicodeEscaper} instance
    060     */
    061    public static JavaUnicodeEscaper between(final int codePointLow, final int codePointHigh) {
    062        return new JavaUnicodeEscaper(codePointLow, codePointHigh, true);
    063    }
    064
    065    /**
    066     * Constructs a {@link JavaUnicodeEscaper} outside of the specified values (exclusive).
    067     *
    068     * @param codePointLow
    069     *            below which to escape
    070     * @param codePointHigh
    071     *            above which to escape
    072     * @return the newly created {@link UnicodeEscaper} instance
    073     */
    074    public static JavaUnicodeEscaper outsideOf(final int codePointLow, final int codePointHigh) {
    075        return new JavaUnicodeEscaper(codePointLow, codePointHigh, false);
    076    }
    077
    078    /**
    079     * Constructs a {@link JavaUnicodeEscaper} for the specified range. This is the underlying method for the
    080     * other constructors/builders. The {@code below} and {@code above} boundaries are inclusive when
    081     * {@code between} is {@code true} and exclusive when it is {@code false}.
    082     *
    083     * @param below
    084     *            int value representing the lowest code point boundary
    085     * @param above
    086     *            int value representing the highest code point boundary
    087     * @param between
    088     *            whether to escape between the boundaries or outside them
    089     */
    090    public JavaUnicodeEscaper(final int below, final int above, final boolean between) {
    091        super(below, above, between);
    092    }
    093
    094    /**
    095     * Converts the given code point to a hexadecimal string of the form {@code "\\uXXXX\\uXXXX"}
    096     *
    097     * @param codePoint
    098     *            a Unicode code point
    099     * @return the hexadecimal string for the given code point
    100     */
    101    @Override
    102    protected String toUtf16Escape(final int codePoint) {
    103        final char[] surrogatePair = Character.toChars(codePoint);
    104        return "\\u" + hex(surrogatePair[0]) + "\\u" + hex(surrogatePair[1]);
    105    }
    106
    107}