/*
 * Copyright 2005 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.
 */

package org.drools.decisiontable.parser;

import java.io.InputStream;

import org.drools.template.model.Package;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 *
 * A special test for parsing a large workbook, to see how it scales.
 */
public class RuleWorksheetParseLargeTest {

    private long startTimer;

    private long endTimer;

    /**
     * Tests parsing a large spreadsheet into an in memory ruleset. This doesn't
     * really do anything much at present. Takes a shed-load of memory to dump
     * out this much XML as a string, so really should think of using a stream
     * in some cases... (tried StringWriter, but is still in memory, so doesn't
     * help).
     *
     * Stream to a temp file would work: return a stream from that file
     * (decorate FileInputStream such that when you close it, it deletes the
     * temp file).... must be other options.
     *
     * @throws Exception
     */
    @Test
    public void testLargeWorkSheetParseToRuleset() throws Exception {
        //  Test removed until have streaming sorted in future. No one using Uber Tables just yet !
        InputStream stream = RuleWorksheetParseLargeTest.class.getResourceAsStream( "/data/VeryLargeWorkbook.xls" );

        startTimer( );
        RuleSheetListener listener = RuleWorksheetParseTest.getRuleSheetListener( stream );
        stopTimer( );

        System.out.println( "Time to parse large table : " + getTime() + "ms" );
        Package ruleset = listener.getRuleSet( );
        assertNotNull( ruleset );

//        startTimer();
//        String xml = ...;   // toXml() not in Package any more.
//        System.out.println( xml );
//        stopTimer();
//        System.out.println("Time taken for rendering: " + getTime() + "ms");
    }

    private void startTimer() {
        this.startTimer = System.currentTimeMillis();
    }


    private void stopTimer() {
        this.endTimer = System.currentTimeMillis();
    }

    private long getTime() {
        return this.endTimer - this.startTimer;
    }

}