samples/apifest1/day2/RealTest.java
author Jaroslav Tulach <jtulach@netbeans.org>
Sat, 14 Jun 2008 09:58:08 +0200
changeset 153 b5cbb797ec0a
parent 133 50bf1b976c0d
child 154 0fd5e9c500b9
permissions -rw-r--r--
up to line 2000
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/*
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 * The contents of this file are subject to the terms of the Common Development
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 * and Distribution License (the License). You may not use this file except in
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 * compliance with the License.
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 *
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 * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
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 * or http://www.netbeans.org/cddl.txt.
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 *
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 * When distributing Covered Code, include this CDDL Header Notice in each file
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 * and include the License file at http://www.netbeans.org/cddl.txt.
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 * If applicable, add the following below the CDDL Header, with the fields
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 * enclosed by brackets [] replaced by your own identifying information:
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 * "Portions Copyrighted [year] [name of copyright owner]"
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 *
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 * The Original Software is NetBeans. The Initial Developer of the Original
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 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
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 * Microsystems, Inc. All Rights Reserved.
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 */
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package org.netbeans.apifest.boolcircuit;
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import java.security.CodeSource;
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import java.security.Permission;
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import java.security.PermissionCollection;
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import java.security.Policy;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Enumeration;
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import junit.framework.TestCase;
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import junit.framework.*;
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// BEGIN: apitest.day2.RealTest
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/** This file contains the APIFest quest for day 2. Simply, turn the 
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 * boolean circuit into circuit that can compute with double values from 0 to 1.
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 * <p>
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 * This means that where ever a boolean was used to represent input or 
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 * output values, one can now use any double number from >= 0 and <= 1.
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 * Still, to support backward compatibility, the operations with booleans
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 * has to be kept available and have to work. In fact False shall be 
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 * treated as 0 and True as 1.
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 * <p>
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 * The basic elements has to be modified to work on doubles in the following
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 * way:
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 * <ul>
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 *   <li>negation - neg(x) = 1 - x, this is correct extension as neg(false)=neg(0)=1-0=1=true
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 *   <li>and - and(x,y) = x * y, again this is fine as and(true,true)=1*1=true and also
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 *             and(false,true)=0*1=0=false
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 *   <li>or - or(x,y) = 1 - (1 - x) * (1 - y) and this is also ok as
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 *             or(false,false) = 1 - (1 - 0) * (1 - 0) = 1 - 1 = 0 = false
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 *             or(true,false) = 1 - (1 - 1) * (1 - 0) = 1 - 0 * 1 = 1 = true
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 * </ul>
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 * <p>
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 * However as the circuits with doubles are more rich than plain boolean circuits,
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 * there is additional requirement to allow any user of your API to write its 
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 * own "element" type. This is all going to be exercise in the tests bellow
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 * which you are supposed to implement.
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 */
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public class RealTest extends TestCase {
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    static {
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        // your code shall run without any permissions
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    }
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    public RealTest(String testName) {
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        super(testName);
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    }
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    /** First of all create a circuit which will evaluate
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     * expression (X1 and X2) or not(x1). Hold the circuit
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     * in some variable.
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     *
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     * Feed this circuit with x1=true, x2=false, assert result is false
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     *
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     * Feed the same circuit with x1=false, x2=true, assert result is true
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     *
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     * Feed the same circuit with x1=0.0, x2=1.0, assert result is 1.0
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     *
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     * Feed the same circuit with x1=0.5, x2=0.5, assert result is 0.625
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     *
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     * Feed the same circuit with x1=0.0, x2=2.0, make sure it throws an exception
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     */
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    public void testX1andX2orNotX1() {
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        fail("testX1andX2orNotX1");
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    }
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    /** Ensure that one variable cannot be filled with two different values.
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     * Create a circuit for x1 and x1. Make sure that for any usage of your
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     * API that would not lead to x1 * x1 result, an exception is thrown.
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     * For example if there was a way to feed the circuit with two different 
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     * values 0.3 and 0.5 an exception is thrown indicating that this is 
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     * improper use of the circuit.
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     */
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    public void testImproperUseOfTheCircuit() {
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        fail("testImproperUseOfTheCircuit");
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    }
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    /** Write your own element type called "gte" that will have two inputs and one output.
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     * The output value will be 1 if x1 >= x2 and 0 otherwise. 
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     * 
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     * Create 
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     * circuit for following expression: (x1 and not(x1)) gte x1
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     *
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     * Feed the circuit with 0.5 and verify the result is 0
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     *
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     * Feed the same circuit with 1 and verify the result is 0
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     *
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     * Feed the same circuit with 0 and verify the result is 1
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     */
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    public void testGreaterThanEqualElement() {
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        fail("testGreaterThanEqualElement");
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    }
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}
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// END: apitest.day2.RealTest
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