spring LayerId 源码
springboot LayerId 代码
文件路径：/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/type/LayerId.java
/*
* Copyright 2012-2020 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.boot.buildpack.platform.docker.type;
import java.math.BigInteger;
import org.springframework.util.Assert;
/**
* A layer ID as used inside a Docker image of the form {@code algorithm: hash}.
*
* @author Phillip Webb
* @since 2.3.0
*/
public final class LayerId {
private final String value;
private final String algorithm;
private final String hash;
private LayerId(String value, String algorithm, String hash) {
this.value = value;
this.algorithm = algorithm;
this.hash = hash;
}
/**
* Return the algorithm of layer.
* @return the algorithm
*/
public String getAlgorithm() {
return this.algorithm;
}
/**
* Return the hash of the layer.
* @return the layer hash
*/
public String getHash() {
return this.hash;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
return this.value.equals(((LayerId) obj).value);
}
@Override
public int hashCode() {
return this.value.hashCode();
}
@Override
public String toString() {
return this.value;
}
/**
* Create a new {@link LayerId} with the specified value.
* @param value the layer ID value of the form {@code algorithm: hash}
* @return a new layer ID instance
*/
public static LayerId of(String value) {
Assert.hasText(value, "Value must not be empty");
int i = value.indexOf(':');
Assert.isTrue(i >= 0, () -> "Invalid layer ID '" + value + "'");
return new LayerId(value, value.substring(0, i), value.substring(i + 1));
}
/**
* Create a new {@link LayerId} from a SHA-256 digest.
* @param digest the digest
* @return a new layer ID instance
*/
public static LayerId ofSha256Digest(byte[] digest) {
Assert.notNull(digest, "Digest must not be null");
Assert.isTrue(digest.length == 32, "Digest must be exactly 32 bytes");
String algorithm = "sha256";
String hash = String.format("%064x", new BigInteger(1, digest));
return new LayerId(algorithm + ":" + hash, algorithm, hash);
}
}
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- 本文标签： Spring Boot Spring Java
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