package com.sample;

/*
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 */

import java.io.StringReader;

import org.drools.RuleBase;
import org.drools.RuleBaseFactory;
import org.drools.WorkingMemory;
import org.drools.compiler.PackageBuilder;
import org.drools.decisiontable.InputType;
import org.drools.decisiontable.SpreadsheetCompiler;

public class DecisionTableTest {

    public static final void main(String[] args) {
        try {

            //load up the rulebase
            RuleBase ruleBase = readDecisionTable();
            WorkingMemory workingMemory = ruleBase.newStatefulSession();
            
            //go !
            Message message = new Message();
            message.setMessage(  "Hello World" );
            message.setStatus( Message.HELLO );
            workingMemory.insert( message );
            workingMemory.fireAllRules();   
            
            
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    /**
     * Please note that this is the "low level" rule assembly API.
     */
    private static RuleBase readDecisionTable() throws Exception {
        //read in the source
        final SpreadsheetCompiler converter = new SpreadsheetCompiler();
        final String drl = converter.compile( "/Sample.xls", InputType.XLS );
        PackageBuilder builder = new PackageBuilder();
        builder.addPackageFromDrl( new StringReader( drl ) );
        org.drools.rule.Package pkg = builder.getPackage();
        RuleBase ruleBase = RuleBaseFactory.newRuleBase();
        ruleBase.addPackage( pkg );
        return ruleBase;
    }

    public static class Message {
        public static final int HELLO = 0;
        public static final int GOODBYE = 1;

        private String message;

        private int status;

        public String getMessage() {
            return this.message;
        }

        public void setMessage(String message) {
            this.message = message;
        }

        public int getStatus() {
            return this.status;
        }

        public void setStatus( int status ) {
            this.status = status;
        }
    }
    
}
