spring StackId 源码
springboot StackId 代码
文件路径：/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/build/StackId.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.build;
import org.springframework.boot.buildpack.platform.docker.type.Image;
import org.springframework.boot.buildpack.platform.docker.type.ImageConfig;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* A Stack ID.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
class StackId {
private static final String LABEL_NAME = "io.buildpacks.stack.id";
private final String value;
StackId(String value) {
this.value = value;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
return this.value.equals(((StackId) obj).value);
}
@Override
public int hashCode() {
return this.value.hashCode();
}
@Override
public String toString() {
return this.value;
}
/**
* Factory method to create a {@link StackId} from an {@link Image}.
* @param image the source image
* @return the extracted stack ID
*/
static StackId fromImage(Image image) {
Assert.notNull(image, "Image must not be null");
return fromImageConfig(image.getConfig());
}
/**
* Factory method to create a {@link StackId} from an {@link ImageConfig}.
* @param imageConfig the source image config
* @return the extracted stack ID
*/
private static StackId fromImageConfig(ImageConfig imageConfig) {
String value = imageConfig.getLabels().get(LABEL_NAME);
Assert.state(StringUtils.hasText(value), () -> "Missing '" + LABEL_NAME + "' stack label");
return new StackId(value);
}
/**
* Factory method to create a {@link StackId} with a given value.
* @param value the stack ID value
* @return a new stack ID instance
*/
static StackId of(String value) {
Assert.hasText(value, "Value must not be empty");
return new StackId(value);
}
}
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- 所属分类： 后端技术
- 本文标签： Java Spring Spring Boot
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