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 * CruiseControl, a Continuous Integration Toolkit
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package net.sourceforge.cruisecontrol.dashboard.tabs;

import org.aspectj.lang.ProceedingJoinPoint;
import org.springframework.web.servlet.HandlerExecutionChain;
import org.springframework.web.servlet.HandlerInterceptor;

public class InterceptorInjector {
    private HandlerInterceptor[] interceptorsOfFramework = new HandlerInterceptor[0];

    public HandlerExecutionChain mergeInterceptorsToTabs(ProceedingJoinPoint pjp) throws Throwable {
        HandlerExecutionChain handlerExecutionChain = (HandlerExecutionChain) pjp.proceed();
        if (handlerExecutionChain == null) {
            return null;
        }
        return new HandlerExecutionChain(handlerExecutionChain.getHandler(),
                mergeInterceptors(handlerExecutionChain));
    }

    private HandlerInterceptor[] mergeInterceptors(HandlerExecutionChain handlerExecutionChain) {
        HandlerInterceptor[] tabInterceptors = handlerExecutionChain.getInterceptors();
        if (tabInterceptors == null) {
            return interceptorsOfFramework;
        }
        HandlerInterceptor[] result =
                new HandlerInterceptor[interceptorsOfFramework.length + tabInterceptors.length];
        System.arraycopy(interceptorsOfFramework, 0, result, 0, interceptorsOfFramework.length);
        System.arraycopy(tabInterceptors, 0, result, interceptorsOfFramework.length, tabInterceptors.length);
        return result;
    }

    public void setInterceptors(HandlerInterceptor[] interceptorsOfFramework) {
        this.interceptorsOfFramework = interceptorsOfFramework;
    }
}