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// Copyright 2016 Yahoo Inc. 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._
/**
* Picks up classes used in method bodies.
* @author tonytv
*/
private class AnalyzeMethodVisitor(val analyzeClassVisitor : AnalyzeClassVisitor)
extends MethodVisitor(Opcodes.ASM5) with AnnotationVisitorTrait with AttributeVisitorTrait with SubVisitorTrait {
override def visitParameterAnnotation(parameter: Int, desc: String, visible: Boolean): AnnotationVisitor = super.visitParameterAnnotation(parameter, desc, visible)
override def visitAnnotationDefault(): AnnotationVisitor = super.visitAnnotationDefault()
override def visitAttribute(attribute: Attribute): Unit = super.visitAttribute(attribute)
override def visitAnnotation(desc: String, visible: Boolean): AnnotationVisitor = super.visitAnnotation(desc, visible)
override def visitEnd(): Unit = super.visitEnd()
override def visitMultiANewArrayInsn(desc: String, dims: Int) {
imports ++= getClassName(Type.getType(desc)).toList
}
override def visitMethodInsn(opcode: Int, owner: String, name: String, desc: String, itf: Boolean) {
imports ++= internalNameToClassName(owner)
imports ++= Type.getArgumentTypes(desc).flatMap(getClassName)
imports ++= getClassName(Type.getReturnType(desc))
}
override def visitFieldInsn(opcode: Int, owner: String, name: String, desc: String) {
imports ++= internalNameToClassName(owner) ++ getClassName(Type.getType(desc)).toList
}
override def visitTypeInsn(opcode: Int, `type` : String) {
imports ++= internalNameToClassName(`type`)
}
override def visitTryCatchBlock(start: Label, end: Label, handler: Label, `type` : String) {
if (`type` != null) //null means finally block
imports ++= internalNameToClassName(`type`)
}
override def visitLocalVariable(name: String, desc: String, signature: String, start: Label, end: Label, index: Int) {
imports += Type.getType(desc).getClassName
}
override def visitLdcInsn(constant: AnyRef) {
constant match {
case typeConstant: Type => imports ++= getClassName(typeConstant)
case _ =>
}
}
override def visitInvokeDynamicInsn(name: String, desc: String, bootstrapMethod: Handle, bootstrapMethodArgs: AnyRef*) {
bootstrapMethodArgs.foreach {
case typeConstant: Type =>
imports ++= getClassName(typeConstant)
case handle: Handle =>
imports ++= internalNameToClassName(handle.getOwner)
imports ++= Type.getArgumentTypes(desc).flatMap(getClassName)
case _ : Number =>
case _ : String =>
case other => throw new AssertionError(s"Unexpected type ${other.getClass} with value '$other'")
}
}
override def visitMaxs(maxStack: Int, maxLocals: Int) {}
override def visitLineNumber(line: Int, start: Label) {}
//only for debugging
override def visitLookupSwitchInsn(dflt: Label, keys: Array[Int], labels: Array[Label]) {}
override def visitTableSwitchInsn(min: Int, max: Int, dflt: Label, labels: Label*): Unit = super.visitTableSwitchInsn(min, max, dflt, labels: _*)
override def visitIincInsn(`var` : Int, increment: Int) {}
override def visitLabel(label: Label) {}
override def visitJumpInsn(opcode: Int, label: Label) {}
override def visitVarInsn(opcode: Int, `var` : Int) {}
override def visitIntInsn(opcode: Int, operand: Int) {}
override def visitInsn(opcode: Int) {}
override def visitFrame(`type` : Int, nLocal: Int, local: Array[AnyRef], nStack: Int, stack: Array[AnyRef]) {}
override def visitCode() {}
}
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