Build jump graph

src/main/java/info/sigterm/deob/attributes/code/Instruction.java

@@ -1,11 +1,17 @@
 package info.sigterm.deob.attributes.code;
 
+import java.util.ArrayList;
+
 public class Instruction
 {
 	private Instructions instructions;
 	private InstructionType type;
-	private int pc;
-	protected int length = 1;
+
+	private int pc; // offset into method this instructions resides at
+	protected int length = 1; // length of this instruction
+
+	private ArrayList<Instruction> jump = new ArrayList<Instruction>(); // instructions which this instruction jumps to
+	private ArrayList<Instruction> from = new ArrayList<Instruction>(); // instructions which jump to this instruction
 
 	public Instruction(Instructions instructions, InstructionType type, int pc)
 	{
@@ -14,8 +20,27 @@ public class Instruction
 		this.pc = pc;
 	}
 
+	public int getPc()
+	{
+		return pc;
+	}
+
 	public int getLength()
 	{
 		return length;
 	}
+
+	protected void addJump(int offset)
+	{
+		Instruction other = instructions.findInstruction(pc + offset);
+		assert other != null;
+		assert other != this;
+
+		this.jump.add(other);
+		other.from.add(this);
+	}
+
+	public void buildJumpGraph()
+	{
+	}
 }