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Kotlin conversion: CompressionAlgorithm

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This commit is contained in:
Paul Schaub 2023-08-04 17:02:37 +02:00
parent 7bfba565fe
commit c614dc0e7b
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
2 changed files with 50 additions and 79 deletions
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79
pgpainless-core/src/main/java/org/pgpainless/algorithm/CompressionAlgorithm.java
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@ -1,79 +0,0 @@
// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.concurrent.ConcurrentHashMap;
import org.bouncycastle.bcpg.CompressionAlgorithmTags;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* Enumeration of possible compression algorithms.
*
* @see <a href="https://tools.ietf.org/html/rfc4880#section-9.3">RFC4880: Compression Algorithm Tags</a>
*/
public enum CompressionAlgorithm {
UNCOMPRESSED (CompressionAlgorithmTags.UNCOMPRESSED),
ZIP (CompressionAlgorithmTags.ZIP),
ZLIB (CompressionAlgorithmTags.ZLIB),
BZIP2 (CompressionAlgorithmTags.BZIP2),
;
private static final Map<Integer, CompressionAlgorithm> MAP = new ConcurrentHashMap<>();
static {
for (CompressionAlgorithm c : CompressionAlgorithm.values()) {
MAP.put(c.algorithmId, c);
}
}
/**
* Return the {@link CompressionAlgorithm} value that corresponds to the provided numerical id.
* If an invalid id is provided, null is returned.
*
* @param id id
* @return compression algorithm
*/
@Nullable
public static CompressionAlgorithm fromId(int id) {
return MAP.get(id);
}
/**
* Return the {@link CompressionAlgorithm} value that corresponds to the provided numerical id.
* If an invalid id is provided, thrown an {@link NoSuchElementException}.
*
* @param id id
* @return compression algorithm
* @throws NoSuchElementException in case of an unmapped id
*/
@Nonnull
public static CompressionAlgorithm requireFromId(int id) {
CompressionAlgorithm algorithm = fromId(id);
if (algorithm == null) {
throw new NoSuchElementException("No CompressionAlgorithm found for id " + id);
}
return algorithm;
}
private final int algorithmId;
CompressionAlgorithm(int id) {
this.algorithmId = id;
}
/**
* Return the numerical algorithm tag corresponding to this compression algorithm.
* @return id
*/
public int getAlgorithmId() {
return algorithmId;
}
}

50
pgpainless-core/src/main/java/org/pgpainless/algorithm/CompressionAlgorithm.kt Normal file
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.algorithm
/**
* Enumeration of possible compression algorithms.
*
* See also [RFC4880 - Compression Algorithm Tags](https://tools.ietf.org/html/rfc4880#section-9.3)
*/
enum class CompressionAlgorithm(val algorithmId: Int) {
UNCOMPRESSED(0),
ZIP(1),
ZLIB(2),
BZIP2(3),
;
companion object {
/**
* Return the [CompressionAlgorithm] value that corresponds to the provided numerical id.
* If an invalid id is provided, null is returned.
*
* @param id id
* @return compression algorithm
*/
@JvmStatic
fun fromId(id: Int): CompressionAlgorithm? {
return values().firstOrNull {
c -> c.algorithmId == id
}
}
/**
* Return the [CompressionAlgorithm] value that corresponds to the provided numerical id.
* If an invalid id is provided, throw an [NoSuchElementException].
*
* @param id id
* @return compression algorithm
* @throws NoSuchElementException in case of an unmapped id
*/
@JvmStatic
fun requireFromId(id: Int): CompressionAlgorithm {
return fromId(id) ?:
throw NoSuchElementException("No CompressionAlgorithm found for id $id")
}
}
}