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// Portions Copyright [2018] Payara Foundation and/or affiliates

package com.sun.enterprise.admin.util.proxy;

import java.lang.reflect.Method;
import java.util.Iterator;
import java.util.Stack;

/**
 * Represents a call stack. 
 */
public class CallStack {

    private final Stack callStack = new Stack();

    public int getStackSize() {
        return callStack.size();
    }

    public void beginCall(Method m, Object[] args) {
        Call call = new Call(m, args);
        beginCall(call);
    }

    public void beginCall(Call call) {
        callStack.push(call);
    }

    public void endCall() {
        Call call = (Call)callStack.pop();
        if (!call.getState().isFinished()) {
            call.setState(CallState.SUCCESS);
        }
    }

    public void endCallWithError(Throwable th) {
        Call call = (Call)callStack.peek();
        call.setState(CallState.FAILED);
        call.setFailureReason(th);
        endCall();
    }

    public Call getActiveCall() {
        return (Call)callStack.peek();
    }

    public Iterator getCallStack() {
        return callStack.iterator();
    }

}