org.apache.commons.codec.net.Utils Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of gwt-commons-codec Show documentation

The Apache Commons Codec component contains encoders and decoders for various formats such as Base16, Base32, Base64, digest, and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities. This is a port for GWT, which enables program, to use Apache Commons Codec also in the frontend compiled by the gwt compiler to java-script.

There is a newer version: 1.17.1-1

Show newest version

/*
 * 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.codec.net;

import org.apache.commons.codec.DecoderException;

/**
 * Utility methods for this package.
 *
 * This class is immutable and thread-safe.
 *
 * @version $Id: Utils.java 1458495 2013-03-19 20:19:13Z sebb $
 * @since 1.4
 */
class Utils {

    /**
     * Returns the numeric value of the character b in radix 16.
     *
     * @param b
     *            The byte to be converted.
     * @return The numeric value represented by the character in radix 16.
     *
     * @throws DecoderException
     *             Thrown when the byte is not valid per {@link Character#digit(char,int)}
     */
    static int digit16(final byte b) throws DecoderException {
        final int i = Character.digit((char) b, URLCodec.RADIX);
        if (i == -1) {
            throw new DecoderException("Invalid URL encoding: not a valid digit (radix " + URLCodec.RADIX + "): " + b);
        }
        return i;
    }

}