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Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17 and 21 currently. See https://github.com/apache/commons-lang/blob/master/.github/workflows/maven.yml Please ensure your build environment is up-to-date and kindly report any build issues.

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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 XML numeric entity escaped value.
 *
 * @since 3.0
 * @deprecated As of 3.6, use Apache Commons Text
 * 
 * NumericEntityEscaper instead
 */
@Deprecated
public class NumericEntityEscaper extends CodePointTranslator {

    /**
     * Constructs a {@link NumericEntityEscaper} above the specified value (exclusive).
     *
     * @param codePoint above which to escape
     * @return the newly created {@link NumericEntityEscaper} instance
     */
    public static NumericEntityEscaper above(final int codePoint) {
        return outsideOf(0, codePoint);
    }
    /**
     * Constructs a {@link NumericEntityEscaper} below the specified value (exclusive).
     *
     * @param codePoint below which to escape
     * @return the newly created {@link NumericEntityEscaper} instance
     */
    public static NumericEntityEscaper below(final int codePoint) {
        return outsideOf(codePoint, Integer.MAX_VALUE);
    }
    /**
     * Constructs a {@link NumericEntityEscaper} between the specified values (inclusive).
     *
     * @param codePointLow above which to escape
     * @param codePointHigh below which to escape
     * @return the newly created {@link NumericEntityEscaper} instance
     */
    public static NumericEntityEscaper between(final int codePointLow, final int codePointHigh) {
        return new NumericEntityEscaper(codePointLow, codePointHigh, true);
    }

    /**
     * Constructs a {@link NumericEntityEscaper} outside of the specified values (exclusive).
     *
     * @param codePointLow below which to escape
     * @param codePointHigh above which to escape
     * @return the newly created {@link NumericEntityEscaper} instance
     */
    public static NumericEntityEscaper outsideOf(final int codePointLow, final int codePointHigh) {
        return new NumericEntityEscaper(codePointLow, codePointHigh, false);
    }

    private final int below;

    private final int above;

    private final boolean between;

    /**
     * Constructs a {@link NumericEntityEscaper} for all characters.
     */
    public NumericEntityEscaper() {
        this(0, Integer.MAX_VALUE, true);
    }

    /**
     * Constructs a {@link NumericEntityEscaper} 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
     */
    private NumericEntityEscaper(final int below, final int above, final boolean between) {
        this.below = below;
        this.above = above;
        this.between = between;
    }

    /**
     * {@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;
        }

        out.write("&#");
        out.write(Integer.toString(codePoint, 10));
        out.write(';');
        return true;
    }
}