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/*
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

   $Header:$
*/
package org.apache.beehive.controls.test.junit;

import junit.framework.TestCase;

import org.apache.beehive.controls.api.bean.ControlBean;
import org.apache.beehive.controls.api.context.ControlContainerContext;
import org.apache.beehive.controls.api.context.ControlThreadContext;
import org.apache.beehive.controls.test.container.ControlTestContainerContext;
import org.apache.beehive.controls.test.util.ControlContainerContextManager;
import org.apache.beehive.controls.test.util.ControlContainerContextManagerFactory;
import org.apache.beehive.controls.test.ControlTestException;

/**
 * Base control test case.
 */
public abstract class ControlTestCase
    extends TestCase {

    /* todo: push strings into a .properties file */

    private ControlContainerContextManager _controlContainerContextManager = null;

    public void setUp()
        throws Exception {

        super.setUp();

        beginContext();
        initializeControls();
    }

    public void tearDown()
        throws Exception {

        super.tearDown();

        endContext();
    }

    protected ControlContainerContext initializeControlContainerContext() {
        return new ControlTestContainerContext();
    }

    protected ControlContainerContext getControlContainerContext() {
        return getControlContainerContextManager().getControlContainerContext();
    }

    protected void initializeControls() {
        getControlContainerContextManager().instantiateControls(this);
    }

    protected void beginContext() {
        getControlContainerContextManager().beginContext();
    }

    protected void endContext() {
        getControlContainerContextManager().endContext();
    }

    protected ControlContainerContextManager getControlContainerContextManager() {
        if(_controlContainerContextManager == null) {
            ControlContainerContext ccc = initializeControlContainerContext();

            if(ccc == null)
                throw new ControlTestException("Could not instantiate a ControlContainerContextManager as the control container context was null");

            _controlContainerContextManager = ControlContainerContextManagerFactory.getInstance(ccc);
        }

        return _controlContainerContextManager;
    }

    protected ControlBean instantiateControl(String className) {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        try {
            Object controlBean = java.beans.Beans.instantiate(classLoader, className, ControlThreadContext.getContext());
            assert controlBean instanceof ControlBean;
            return (ControlBean)controlBean;
        }
        catch(Exception e) {
            throw new ControlTestException("Could not instantiate control with class \"" + className +
                "\".  Cause: " + e.getMessage(), e);
        }
    }
}