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Kotlin conversion: StreamEncoding
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2 changed files with 71 additions and 101 deletions
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// SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.algorithm;
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import java.util.Map;
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import java.util.NoSuchElementException;
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import java.util.concurrent.ConcurrentHashMap;
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import org.bouncycastle.openpgp.PGPLiteralData;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* Enumeration of possible encoding formats of the content of the literal data packet.
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*
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* @see <a href="https://tools.ietf.org/html/rfc4880#section-5.9">RFC4880: Literal Data Packet</a>
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*/
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public enum StreamEncoding {
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/**
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* The Literal packet contains binary data.
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*/
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BINARY(PGPLiteralData.BINARY),
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/**
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* The Literal packet contains text data, and thus may need line ends converted to local form, or other
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* text-mode changes.
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*/
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TEXT(PGPLiteralData.TEXT),
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/**
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* Indication that the implementation believes that the literal data contains UTF-8 text.
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*/
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UTF8(PGPLiteralData.UTF8),
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/**
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* Early versions of PGP also defined a value of 'l' as a 'local' mode for machine-local conversions.
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* RFC 1991 [RFC1991] incorrectly stated this local mode flag as '1' (ASCII numeral one).
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* Both of these local modes are deprecated.
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*/
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@Deprecated
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LOCAL('l'),
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;
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private final char code;
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private static final Map<Character, StreamEncoding> MAP = new ConcurrentHashMap<>();
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static {
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for (StreamEncoding f : StreamEncoding.values()) {
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MAP.put(f.code, f);
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}
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// RFC 1991 [RFC1991] incorrectly stated local mode flag as '1', see doc of LOCAL.
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MAP.put('1', LOCAL);
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}
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StreamEncoding(char code) {
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this.code = code;
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}
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/**
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* Return the code identifier of the encoding.
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*
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* @return identifier
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*/
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public char getCode() {
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return code;
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}
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/**
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* Return the {@link StreamEncoding} corresponding to the provided code identifier.
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* If no matching encoding is found, return null.
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*
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* @param code identifier
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* @return encoding enum
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*/
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@Nullable
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public static StreamEncoding fromCode(int code) {
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return MAP.get((char) code);
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}
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/**
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* Return the {@link StreamEncoding} corresponding to the provided code identifier.
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* If no matching encoding is found, throw a {@link NoSuchElementException}.
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*
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* @param code identifier
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* @return encoding enum
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*
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* @throws NoSuchElementException in case of an unmatched identifier
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*/
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@Nonnull
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public static StreamEncoding requireFromCode(int code) {
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StreamEncoding encoding = fromCode(code);
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if (encoding == null) {
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throw new NoSuchElementException("No StreamEncoding found for code " + code);
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}
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return encoding;
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}
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}
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@ -0,0 +1,71 @@
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.algorithm
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/**
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* Enumeration of possible encoding formats of the content of the literal data packet.
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*
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* See [RFC4880: Literal Data Packet](https://tools.ietf.org/html/rfc4880#section-5.9)
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*/
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enum class StreamEncoding(val code: Char) {
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/**
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* The Literal packet contains binary data.
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*/
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BINARY('b'),
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/**
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* The Literal packet contains text data, and thus may need line ends converted to local form, or other
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* text-mode changes.
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*/
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TEXT('t'),
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/**
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* Indication that the implementation believes that the literal data contains UTF-8 text.
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*/
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UTF8('u'),
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/**
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* Early versions of PGP also defined a value of 'l' as a 'local' mode for machine-local conversions.
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* RFC 1991 [RFC1991] incorrectly stated this local mode flag as '1' (ASCII numeral one).
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* Both of these local modes are deprecated.
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*/
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@Deprecated("LOCAL is deprecated.")
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LOCAL('l'),
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;
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companion object {
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/**
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* Return the [StreamEncoding] corresponding to the provided code identifier.
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* If no matching encoding is found, return null.
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*
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* @param code identifier
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* @return encoding enum
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*/
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@JvmStatic
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fun fromCode(code: Int): StreamEncoding? {
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return values().firstOrNull {
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it.code == code.toChar()
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} ?: if (code == 1) return LOCAL else null
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}
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/**
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* Return the [StreamEncoding] corresponding to the provided code identifier.
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* If no matching encoding is found, throw a [NoSuchElementException].
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*
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* @param code identifier
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* @return encoding enum
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*
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* @throws NoSuchElementException in case of an unmatched identifier
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*/
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@JvmStatic
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fun requireFromCode(code: Int): StreamEncoding {
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return fromCode(code) ?:
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throw NoSuchElementException("No StreamEncoding found for code $code")
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}
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}
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}
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