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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.lang3.text.translate;
+
+import java.io.IOException;
+import java.io.Writer;
+
+/**
+ * Translates code points to their Unicode escaped value.
+ *
+ * @since 3.0
+ * @deprecated As of 3.6, use Apache Commons Text
+ * <a href="https://commons.apache.org/proper/commons-text/javadocs/api-release/org/apache/commons/text/translate/UnicodeEscaper.html">
+ * UnicodeEscaper</a> instead
+ */
+@Deprecated
+public class UnicodeEscaper extends CodePointTranslator {
+
+ private final int below;
+ private final int above;
+ private final boolean between;
+
+ /**
+ * Constructs a {@link UnicodeEscaper} for all characters.
+ */
+ public UnicodeEscaper() {
+ this(0, Integer.MAX_VALUE, true);
+ }
+
+ /**
+ * Constructs a {@link UnicodeEscaper} for the specified range. This is
+ * the underlying method for the other constructors/builders. The {@code below}
+ * and {@code above} boundaries are inclusive when {@code between} is
+ * {@code true} and exclusive when it is {@code false}.
+ *
+ * @param below int value representing the lowest code point boundary
+ * @param above int value representing the highest code point boundary
+ * @param between whether to escape between the boundaries or outside them
+ */
+ protected UnicodeEscaper(final int below, final int above, final boolean between) {
+ this.below = below;
+ this.above = above;
+ this.between = between;
+ }
+
+ /**
+ * Constructs a {@link UnicodeEscaper} below the specified value (exclusive).
+ *
+ * @param codePoint below which to escape
+ * @return the newly created {@link UnicodeEscaper} instance
+ */
+ public static UnicodeEscaper below(final int codePoint) {
+ return outsideOf(codePoint, Integer.MAX_VALUE);
+ }
+
+ /**
+ * Constructs a {@link UnicodeEscaper} above the specified value (exclusive).
+ *
+ * @param codePoint above which to escape
+ * @return the newly created {@link UnicodeEscaper} instance
+ */
+ public static UnicodeEscaper above(final int codePoint) {
+ return outsideOf(0, codePoint);
+ }
+
+ /**
+ * Constructs a {@link UnicodeEscaper} outside of the specified values (exclusive).
+ *
+ * @param codePointLow below which to escape
+ * @param codePointHigh above which to escape
+ * @return the newly created {@link UnicodeEscaper} instance
+ */
+ public static UnicodeEscaper outsideOf(final int codePointLow, final int codePointHigh) {
+ return new UnicodeEscaper(codePointLow, codePointHigh, false);
+ }
+
+ /**
+ * Constructs a {@link UnicodeEscaper} between the specified values (inclusive).
+ *
+ * @param codePointLow above which to escape
+ * @param codePointHigh below which to escape
+ * @return the newly created {@link UnicodeEscaper} instance
+ */
+ public static UnicodeEscaper between(final int codePointLow, final int codePointHigh) {
+ return new UnicodeEscaper(codePointLow, codePointHigh, true);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean translate(final int codePoint, final Writer out) throws IOException {
+ if (between) {
+ if (codePoint < below || codePoint > above) {
+ return false;
+ }
+ } else if (codePoint >= below && codePoint <= above) {
+ return false;
+ }
+
+ // TODO: Handle potential + sign per various Unicode escape implementations
+ if (codePoint > 0xffff) {
+ out.write(toUtf16Escape(codePoint));
+ } else {
+ out.write("\\u");
+ out.write(HEX_DIGITS[(codePoint >> 12) & 15]);
+ out.write(HEX_DIGITS[(codePoint >> 8) & 15]);
+ out.write(HEX_DIGITS[(codePoint >> 4) & 15]);
+ out.write(HEX_DIGITS[(codePoint) & 15]);
+ }
+ return true;
+ }
+
+ /**
+ * Converts the given code point to a hex string of the form {@code "\\uXXXX"}
+ *
+ * @param codePoint
+ * a Unicode code point
+ * @return the hex string for the given code point
+ *
+ * @since 3.2
+ */
+ protected String toUtf16Escape(final int codePoint) {
+ return "\\u" + hex(codePoint);
+ }
+}