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/*
* Fabric3
* Copyright (c) 2009-2011 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
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* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
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*
* Fabric3 is distributed in the hope that it will be useful,
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* See the GNU General Public License for more details.
*
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package org.fabric3.implementation.junit.introspection;

import org.osoa.sca.annotations.Reference;

import org.fabric3.implementation.java.introspection.ImplementationArtifactNotFound;
import org.fabric3.implementation.junit.model.JUnitImplementation;
import org.fabric3.spi.introspection.ImplementationNotFoundException;
import org.fabric3.spi.introspection.IntrospectionContext;
import org.fabric3.spi.introspection.TypeMapping;
import org.fabric3.spi.introspection.java.HeuristicProcessor;
import org.fabric3.spi.introspection.java.IntrospectionHelper;
import org.fabric3.spi.introspection.java.annotation.ClassVisitor;
import org.fabric3.spi.model.type.java.InjectingComponentType;

/**
 * @version $Rev: 9763 $ $Date: 2011-01-03 00:48:06 +0000 (Mon, 03 Jan 2011) $
 */
public class JUnitImplementationProcessorImpl implements JUnitImplementationProcessor {
    private final ClassVisitor classVisitor;
    private final HeuristicProcessor heuristic;
    private final IntrospectionHelper helper;

    public JUnitImplementationProcessorImpl(@Reference(name = "classVisitor") ClassVisitor classVisitor,
                                            @Reference(name = "heuristic") HeuristicProcessor heuristic,
                                            @Reference(name = "helper") IntrospectionHelper helper) {
        this.classVisitor = classVisitor;
        this.heuristic = heuristic;
        this.helper = helper;
    }

    public void introspect(JUnitImplementation implementation, IntrospectionContext context) {
        String implClassName = implementation.getImplementationClass();
        InjectingComponentType componentType = new InjectingComponentType(implClassName);
        componentType.setScope("STATELESS");
        implementation.setComponentType(componentType);

        ClassLoader cl = context.getClassLoader();
        Class implClass;
        try {
            implClass = helper.loadClass(implClassName, cl);
        } catch (ImplementationNotFoundException e) {
            Throwable cause = e.getCause();
            if (cause instanceof ClassNotFoundException || cause instanceof NoClassDefFoundError) {
                // CNFE and NCDFE may be thrown as a result of a referenced class not being on the classpath
                // If this is the case, ensure the correct class name is reported, not just the implementation 
                context.addError(new ImplementationArtifactNotFound(implClassName, e.getCause().getMessage()));
            } else {
                context.addError(new ImplementationArtifactNotFound(implClassName));
            }
            return;
        }
        TypeMapping mapping = context.getTypeMapping(implClass);
        if (mapping == null) {
            mapping = new TypeMapping();
            context.addTypeMapping(implClass, mapping);
            helper.resolveTypeParameters(implClass, mapping);
        }

        classVisitor.visit(implementation, implClass, context);

        heuristic.applyHeuristics(implementation, implClass, context);

    }
}