src/main/java/ftbsc/lll/tools/InsnSequence.java


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package ftbsc.lll.tools;

import ftbsc.lll.exception.InstructionMismatchException;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.InsnList;

import java.util.Objects;

/**
 * Represents a sequence of instructions contained within two given nodes.
 * Extends InsnList, but provides additional flexibility.
 */
public class InsnSequence extends InsnList implements Opcodes {
   /**
    * Public constructor.
    * Must be given two non-null, connected nodes.
    * @param startNode the starting node of the pattern
    * @param endNode the first node of the pattern
    */
   public InsnSequence(AbstractInsnNode startNode, AbstractInsnNode endNode) {
      Objects.requireNonNull(startNode);
      Objects.requireNonNull(endNode);
      for(; startNode != endNode && startNode != null; startNode = startNode.getNext())
         super.add(startNode);
      if (startNode == null)
         throw new InstructionMismatchException("Nodes" + getFirst() + " and " + getLast() + " are not connected.");
   }

   //TODO replace
}