spring ConstantFieldFeature 源码
spring ConstantFieldFeature 代码
文件路径：/spring-core/graalvm/src/main/java/org/springframework/aot/graalvm/ConstantFieldFeature.java
/*
* Copyright 2002-2022 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.aot.graalvm;
import com.oracle.svm.core.annotate.AutomaticFeature;
import com.oracle.svm.hosted.FeatureImpl.DuringSetupAccessImpl;
import org.graalvm.compiler.debug.DebugContext;
import org.graalvm.nativeimage.hosted.Feature;
/**
* GraalVM {@link Feature} that substitutes field values that match a certain pattern
* with constants without causing build-time initialization.
*
* @author Phillip Webb
* @author Sebastien Deleuze
* @since 6.0
*/
@AutomaticFeature
class ConstantFieldFeature implements Feature {
@Override
public void duringSetup(DuringSetupAccess access) {
duringSetup((DuringSetupAccessImpl) access);
}
private void duringSetup(DuringSetupAccessImpl access) {
DebugContext debug = access.getDebugContext();
try (DebugContext.Scope scope = debug.scope("ConstantFieldFeature.duringSetup")) {
debug.log("Installing constant field substitution processor : " + scope);
ClassLoader classLoader = ConstantFieldFeature.class.getClassLoader();
ConstantFieldSubstitutionProcessor substitutionProcessor =
new ConstantFieldSubstitutionProcessor(debug, classLoader);
access.registerSubstitutionProcessor(substitutionProcessor);
}
}
}
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