Java源码

				package AM.vm_impl.vm_data_structure;
				
				import java.util.Stack;
				import java.util.ArrayList;
				import AM.vm_impl.util.Tracer;
				
				/**
				 * Created by IntelliJ IDEA. User: yellowicq Date: 2004-4-27 Time: 13:35:05
				 * To change this template use File | Settings | File Templates.
				 */
				
				public class OrStack {
				    private Stack opStack;
				    private ArrayList localVars;
				
				    public OrStack() {
				    }
				
				    public void Init() {
				        opStack = new Stack();
				        localVars = new ArrayList();
				    }
				
				    public void push(Object obj) {
				        opStack.push(obj);
				    }
				
				    public void addLocalEntry(int index, Object obj) {
				        localVars.add(index, obj);
				    }
				
				    public void setLocalEntry(int index, Object obj) {
				        try {
				            if (localVars.get(index) == null) {
				                localVars.add(index, obj);
				            }
				            else
				                localVars.set(index, obj);
				        } catch (Exception e) {
				            localVars.add(index, obj);
				        }
				    }
				
				    public void removeLocalEntry(int index) {
				        localVars.remove(index);
				    }
				
				    public Object getLocalEntry(int index) {
				        Object tmpobj = localVars.get(index);
				        return tmpobj;
				    }
				
				    public Object pop() {
				        Object tmpobj = opStack.pop();
				        return tmpobj;
				    }
				
				
				    public void traceOrStack() {
				        Tracer.debug("Current opStack:[" + opStack.toString() + "]");
				        Tracer.debug("Current localVars:[" + localVars.toString() + "]");
				    }
				}