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Executes untrusted Groovy script safely

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package org.kohsuke.groovy.sandbox.impl;

import org.kohsuke.groovy.sandbox.GroovyInterceptor;

/**
 * {@link GroovyInterceptor.Invoker} that chains multiple {@link GroovyInterceptor} instances.
 *
 * This version expects no arguments.
 *
 * @author Kohsuke Kawaguchi
 */
abstract class ZeroArgInvokerChain extends InvokerChain {
    protected ZeroArgInvokerChain(Object receiver) {
        super(receiver);
    }

    public final Object call(Object receiver, String method, Object arg1) throws Throwable {
        throw new UnsupportedOperationException();
    }

    public final Object call(Object receiver, String method, Object arg1, Object arg2) throws Throwable {
        throw new UnsupportedOperationException();
    }

    public final Object call(Object receiver, String method, Object... args) throws Throwable {
        if (args.length!=0)
            throw new UnsupportedOperationException();
        return call(receiver,method);
    }
}