commons-codec-1.11.jar - Apache Commons Codec

commons-codec-1.11.jar is the JAR file for Apache Commons Codec 1.11, which provides implementations of common encoders and decoders such as Base64, Hex, Phonetic and URLs.

JAR File Size and Download Location:

JAR name: commons-codec.jar
Target JDK version: 1.8
Dependency: None
File name: commons-codec-1.11.jar
File size: 335,042 bytes
Date modified: 10/17/2017 
Download: Apache Commons Codec

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org/apache/commons/codec/net/BCodec.java

/*
 * 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 java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;

import org.apache.commons.codec.Charsets;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.EncoderException;
import org.apache.commons.codec.StringDecoder;
import org.apache.commons.codec.StringEncoder;
import org.apache.commons.codec.binary.Base64;

/**
 * Identical to the Base64 encoding defined by <a href="http://www.ietf.org/rfc/rfc1521.txt">RFC 1521</a>
 * and allows a character set to be specified.
 * <p>
 * <a href="http://www.ietf.org/rfc/rfc1522.txt">RFC 1522</a> describes techniques to allow the encoding of non-ASCII
 * text in various portions of a RFC 822 [2] message header, in a manner which is unlikely to confuse existing message
 * handling software.
 * <p>
 * This class is immutable and thread-safe.
 *
 * @see <a href="http://www.ietf.org/rfc/rfc1522.txt">MIME (Multipurpose Internet Mail Extensions) Part Two: Message
 *          Header Extensions for Non-ASCII Text</a>
 *
 * @since 1.3
 * @version $Id: BCodec.java 1429868 2013-01-07 16:08:05Z ggregory $
 */
public class BCodec extends RFC1522Codec implements StringEncoder, StringDecoder {
    /**
     * The default charset used for string decoding and encoding.
     */
    private final Charset charset;

    /**
     * Default constructor.
     */
    public BCodec() {
        this(Charsets.UTF_8);
    }

    /**
     * Constructor which allows for the selection of a default charset
     *
     * @param charset
     *            the default string charset to use.
     *
     * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
     * @since 1.7
     */
    public BCodec(final Charset charset) {
        this.charset = charset;
    }

    /**
     * Constructor which allows for the selection of a default charset
     *
     * @param charsetName
     *            the default charset to use.
     * @throws java.nio.charset.UnsupportedCharsetException
     *             If the named charset is unavailable
     * @since 1.7 throws UnsupportedCharsetException if the named charset is unavailable
     * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a>
     */
    public BCodec(final String charsetName) {
        this(Charset.forName(charsetName));
    }

    @Override
    protected String getEncoding() {
        return "B";
    }

    @Override
    protected byte[] doEncoding(final byte[] bytes) {
        if (bytes == null) {
            return null;
        }
        return Base64.encodeBase64(bytes);
    }

    @Override
    protected byte[] doDecoding(final byte[] bytes) {
        if (bytes == null) {
            return null;
        }
        return Base64.decodeBase64(bytes);
    }

    /**
     * Encodes a string into its Base64 form using the specified charset. Unsafe characters are escaped.
     *
     * @param value
     *            string to convert to Base64 form
     * @param charset
     *            the charset for <code>value</code>
     * @return Base64 string
     * @throws EncoderException
     *             thrown if a failure condition is encountered during the encoding process.
     * @since 1.7
     */
    public String encode(final String value, final Charset charset) throws EncoderException {
        if (value == null) {
            return null;
        }
        return encodeText(value, charset);
    }

    /**
     * Encodes a string into its Base64 form using the specified charset. Unsafe characters are escaped.
     *
     * @param value
     *            string to convert to Base64 form
     * @param charset
     *            the charset for <code>value</code>
     * @return Base64 string
     * @throws EncoderException
     *             thrown if a failure condition is encountered during the encoding process.
     */
    public String encode(final String value, final String charset) throws EncoderException {
        if (value == null) {
            return null;
        }
        try {
            return this.encodeText(value, charset);
        } catch (final UnsupportedEncodingException e) {
            throw new EncoderException(e.getMessage(), e);
        }
    }

    /**
     * Encodes a string into its Base64 form using the default charset. Unsafe characters are escaped.
     *
     * @param value
     *            string to convert to Base64 form
     * @return Base64 string
     * @throws EncoderException
     *             thrown if a failure condition is encountered during the encoding process.
     */
    @Override
    public String encode(final String value) throws EncoderException {
        if (value == null) {
            return null;
        }
        return encode(value, this.getCharset());
    }

    /**
     * Decodes a Base64 string into its original form. Escaped characters are converted back to their original
     * representation.
     *
     * @param value
     *            Base64 string to convert into its original form
     * @return original string
     * @throws DecoderException
     *             A decoder exception is thrown if a failure condition is encountered during the decode process.
     */
    @Override
    public String decode(final String value) throws DecoderException {
        if (value == null) {
            return null;
        }
        try {
            return this.decodeText(value);
        } catch (final UnsupportedEncodingException e) {
            throw new DecoderException(e.getMessage(), e);
        }
    }

    /**
     * Encodes an object into its Base64 form using the default charset. Unsafe characters are escaped.
     *
     * @param value
     *            object to convert to Base64 form
     * @return Base64 object
     * @throws EncoderException
     *             thrown if a failure condition is encountered during the encoding process.
     */
    @Override
    public Object encode(final Object value) throws EncoderException {
        if (value == null) {
            return null;
        } else if (value instanceof String) {
            return encode((String) value);
        } else {
            throw new EncoderException("Objects of type " +
                  value.getClass().getName() +
                  " cannot be encoded using BCodec");
        }
    }

    /**
     * Decodes a Base64 object into its original form. Escaped characters are converted back to their original
     * representation.
     *
     * @param value
     *            Base64 object to convert into its original form
     * @return original object
     * @throws DecoderException
     *             Thrown if the argument is not a <code>String</code>. Thrown if a failure condition is encountered
     *             during the decode process.
     */
    @Override
    public Object decode(final Object value) throws DecoderException {
        if (value == null) {
            return null;
        } else if (value instanceof String) {
            return decode((String) value);
        } else {
            throw new DecoderException("Objects of type " +
                  value.getClass().getName() +
                  " cannot be decoded using BCodec");
        }
    }

    /**
     * Gets the default charset name used for string decoding and encoding.
     *
     * @return the default charset name
     * @since 1.7
     */
    public Charset getCharset() {
        return this.charset;
    }

    /**
     * Gets the default charset name used for string decoding and encoding.
     *
     * @return the default charset name
     */
    public String getDefaultCharset() {
        return this.charset.name();
    }
}

org/apache/commons/codec/net/BCodec.java

 

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