/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed 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.
 */

package org.drools.jsr94.rules;

/*
 * $Id: RuleEngineTestBase.java,v 1.4 2004/11/17 03:09:50 dbarnett Exp $
 *
 * Copyright 2002-2004 (C) The Werken Company. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name "drools" must not be used to endorse or promote products derived
 * from this Software without prior written permission of The Werken Company.
 * For written permission, please contact bob@werken.com.
 *
 * 4. Products derived from this Software may not be called "drools" nor may
 * "drools" appear in their names without prior written permission of The Werken
 * Company. "drools" is a registered trademark of The Werken Company.
 *
 * 5. Due credit should be given to The Werken Company.
 * (http://drools.werken.com/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import javax.rules.RuleServiceProvider;
import javax.rules.StatefulRuleSession;
import javax.rules.StatelessRuleSession;

import junit.framework.TestCase;

/**
 * Base class for all drools JSR94 test cases.
 *
 * @author N. Alex Rupp (n_alex <at>codehaus.org)
 * @author <a href="mailto:thomas.diesler@softcon-itec.de">thomas diesler </a>
 * @author <a href="mailto:michael.frandsen@syngenio.de">Michael Frandsen </a>
 */
public abstract class RuleEngineTestBase extends TestCase {
    protected StatefulRuleSession     statefulSession;

    protected StatelessRuleSession    statelessSession;

    protected ExampleRuleEngineFacade engine;

    protected String                  bindUri         = "sisters.drl";
    protected String                  bindUri_drl     = "sisters_expander.drl";
    protected String                  bindUri_dsl     = "sisters_expander.dsl";
    protected String                  bindUri_globals = "sisters_globals.drl";

    protected RuleServiceProvider     ruleServiceProvider;

    /**
     * Setup the test case.
     */
    protected void setUp() throws Exception {
        super.setUp();
        this.engine = new ExampleRuleEngineFacade();
        this.engine.addRuleExecutionSet( this.bindUri,
                                         RuleEngineTestBase.class.getResourceAsStream( this.bindUri ) );

        final Map map = new HashMap();
        final Reader reader = new InputStreamReader( RuleEngineTestBase.class.getResourceAsStream( this.bindUri_dsl ) );

        map.put( "dsl",
                 this.getDSLText( reader ).toString() );
        this.engine.addRuleExecutionSet( this.bindUri_drl,
                                         RuleEngineTestBase.class.getResourceAsStream( this.bindUri_drl ),
                                         map );

        this.engine.addRuleExecutionSet( this.bindUri_globals,
                                         RuleEngineTestBase.class.getResourceAsStream( this.bindUri_globals ) );

        this.ruleServiceProvider = this.engine.getRuleServiceProvider();
        //        this.statelessSession = engine.getStatelessRuleSession( bindUri );
        //        this.statefulSession = engine.getStatefulRuleSession( bindUri );

    }

    /*
     * Taken from DRLParser
     */
    private StringBuffer getDSLText(final Reader reader) throws IOException {
        final StringBuffer text = new StringBuffer();

        final char[] buf = new char[1024];
        int len = 0;

        while ( (len = reader.read( buf )) >= 0 ) {
            text.append( buf,
                         0,
                         len );
        }
        return text;
    }

    /**
     * Get the requested resource from the ClassLoader.
     *
     * @see ClassLoader#getResource
     */
    protected URL getResource(final String res) {
        return getClass().getClassLoader().getResource( res );
    }

    /**
     * Get the requested resource from the ClassLoader.
     *
     * @see ClassLoader#getResourceAsStream
     */
    protected InputStream getResourceAsStream(final String res) {
        return getClass().getClassLoader().getResourceAsStream( res );
    }
}