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/*
 * Copyright © 2012 Sebastian Hoß 
 * This work is free. You can redistribute it and/or modify it under the
 * terms of the Do What The Fuck You Want To Public License, Version 2,
 * as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.
 */
package com.github.sebhoss.contract.lifecycle;

import com.github.sebhoss.common.annotation.CompilerWarnings;
import com.github.sebhoss.contract.verifier.ContractVerifier;
import com.github.sebhoss.contract.verifier.ContractVerifierFactory;
import com.github.sebhoss.contract.verifier.ContractVerifierFactory.ContractVerifierBuilder;

import org.aopalliance.intercept.MethodInvocation;

/**
 * AOP {@link MethodInvocation}-based implementation of the {@link ContractLifecycle}.
 */
public final class AopLifecycle extends ContractLifecycle {

    private final MethodInvocation invocation;

    /**
     * @param invocation
     *            The method invocation to use.
     * @param contractVerifierFactory
     *            The contract-verifier factory to use.
     */
    public AopLifecycle(final MethodInvocation invocation, final ContractVerifierFactory contractVerifierFactory) {
        super(contractVerifierFactory);
        this.invocation = invocation;
    }

    @Override
    @SuppressWarnings(CompilerWarnings.NULL)
    protected ContractVerifier createVerifier() {
        final ContractVerifierBuilder builder = getContractVerifierFactory().createContractVerifier();

        builder.method(invocation.getMethod());
        builder.instance(invocation.getThis());
        builder.arguments(invocation.getArguments());

        return builder.get();
    }

    @Override
    @SuppressWarnings(CompilerWarnings.NULL)
    protected Object executeMethod() throws Throwable {
        return invocation.proceed();
    }

}