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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.plugin.classanalysis;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Optional;
/**
* Main entry point for class analysis
*
* @author Tony Vaagenes
* @author ollivir
* @author gjoranv
*/
public class Analyze {
public enum JdkVersionCheck {
ENABLED,
DISABLED
}
static ClassFileMetaData analyzeClass(File classFile) {
return analyzeClass(classFile, JdkVersionCheck.DISABLED, null);
}
public static ClassFileMetaData analyzeClass(File classFile, JdkVersionCheck jdkVersionCheck, ArtifactVersion artifactVersion) {
try {
return analyzeClass(new FileInputStream(classFile), jdkVersionCheck, artifactVersion);
} catch (Exception e) {
throw new RuntimeException("An error occurred when analyzing " + classFile.getPath(), e);
}
}
public static ClassFileMetaData analyzeClass(InputStream inputStream, JdkVersionCheck jdkVersionCheck, ArtifactVersion artifactVersion) {
try {
AnalyzeClassVisitor visitor = new AnalyzeClassVisitor(artifactVersion, jdkVersionCheck);
new ClassReader(inputStream).accept(visitor, ClassReader.SKIP_DEBUG);
return visitor.result();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
static Optional<String> internalNameToClassName(String internalClassName) {
if (internalClassName == null) {
return Optional.empty();
} else {
return getClassName(Type.getObjectType(internalClassName));
}
}
static Optional<String> getClassName(Type aType) {
return switch (aType.getSort()) {
case Type.ARRAY -> getClassName(aType.getElementType());
case Type.OBJECT -> Optional.of(aType.getClassName());
case Type.METHOD -> getClassName(aType.getReturnType());
default -> Optional.empty();
};
}
static AnnotationVisitor visitAnnotationDefault(ImportCollector collector) {
return new AnnotationVisitor(Opcodes.ASM9) {
@Override
public void visit(String name, Object value) {
}
@Override
public void visitEnum(String name, String desc, String value) {
collector.addImportWithTypeDesc(desc);
}
@Override
public AnnotationVisitor visitArray(String name) {
return this;
}
@Override
public AnnotationVisitor visitAnnotation(String name, String desc) {
collector.addImportWithTypeDesc(desc);
return this;
}
@Override
public void visitEnd() {
}
};
}
}
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