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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.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Picks up classes used in method bodies.
*
* @author Tony Vaagenes
* @author ollivir
*/
class AnalyzeMethodVisitor extends MethodVisitor implements ImportCollector {
private final Set<String> imports = new HashSet<>();
private final AnalyzeClassVisitor analyzeClassVisitor;
AnalyzeMethodVisitor(AnalyzeClassVisitor analyzeClassVisitor) {
super(Opcodes.ASM9);
this.analyzeClassVisitor = analyzeClassVisitor;
}
public Set<String> imports() {
return imports;
}
@Override
public AnnotationVisitor visitParameterAnnotation(int parameter, String desc, boolean visible) {
return visitAnnotation(desc, visible);
}
@Override
public AnnotationVisitor visitAnnotationDefault() {
return Analyze.visitAnnotationDefault(this);
}
@Override
public void visitAttribute(Attribute attribute) {
addImport(Type.getObjectType(attribute.type));
}
@Override
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
addImportWithTypeDesc(desc);
return Analyze.visitAnnotationDefault(this);
}
@Override
public void visitEnd() {
super.visitEnd();
analyzeClassVisitor.addImports(imports);
}
@Override
public void visitMultiANewArrayInsn(String desc, int dims) {
addImportWithTypeDesc(desc);
}
@Override
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
addImportWithInternalName(owner);
Arrays.asList(Type.getArgumentTypes(desc)).forEach(this::addImport);
addImport(Type.getReturnType(desc));
}
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
addImportWithInternalName(owner);
addImportWithTypeDesc(desc);
}
@Override
public void visitTypeInsn(int opcode, String type) {
addImportWithInternalName(type);
}
@Override
public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
if (type != null) { //null means finally block
addImportWithInternalName(type);
}
}
@Override
public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
addImportWithTypeDesc(desc);
}
@Override
public void visitLdcInsn(Object constant) {
if (constant instanceof Type) {
addImport((Type) constant);
}
}
@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bootstrapMethod, Object... bootstrapMethodArgs) {
addImportWithTypeDesc(desc);
for (Object arg : bootstrapMethodArgs) {
if (arg instanceof Type) {
addImport((Type) arg);
} else if (arg instanceof Handle) {
addImportWithInternalName(((Handle) arg).getOwner());
Arrays.asList(Type.getArgumentTypes(desc)).forEach(this::addImport);
} else if ( ! (arg instanceof Number) && ! (arg instanceof String)) {
throw new AssertionError("Unexpected type " + arg.getClass() + " with value '" + arg + "'");
}
}
}
@Override
public void visitMaxs(int maxStack, int maxLocals) {
}
@Override
public void visitLineNumber(int line, Label start) {
}
//only for debugging
@Override
public void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) {
}
@Override
public void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) {
super.visitTableSwitchInsn(min, max, dflt, labels);
}
@Override
public void visitIincInsn(int variable, int increment) {
}
@Override
public void visitLabel(Label label) {
}
@Override
public void visitJumpInsn(int opcode, Label label) {
}
@Override
public void visitVarInsn(int opcode, int variable) {
}
@Override
public void visitIntInsn(int opcode, int operand) {
}
@Override
public void visitInsn(int opcode) {
}
@Override
public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) {
}
@Override
public void visitCode() {
}
}
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