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feat: PredictableRandomizer will create random values based on a seed…
… [TECH-1449]
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189
src/main/java/org/hisp/dhis/utils/PredictableRandomizer.java
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/* | ||
* Copyright (c) 2004-2022, University of Oslo | ||
* All rights reserved. | ||
* | ||
* Redistribution and use in source and binary forms, with or without | ||
* modification, are permitted provided that the following conditions are met: | ||
* Redistributions of source code must retain the above copyright notice, this | ||
* list of conditions and the following disclaimer. | ||
* | ||
* 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. | ||
* Neither the name of the HISP project nor the names of its contributors may | ||
* be used to endorse or promote products derived from this software without | ||
* specific prior written permission. | ||
* | ||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
* ANY EXPRESS 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 COPYRIGHT OWNER OR 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. | ||
*/ | ||
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package org.hisp.dhis.utils; | ||
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import com.github.javafaker.Faker; | ||
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import java.time.LocalDate; | ||
import java.time.ZoneId; | ||
import java.time.format.DateTimeFormatter; | ||
import java.util.*; | ||
import java.util.concurrent.TimeUnit; | ||
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/** | ||
* This Randomizer will return random values based on a seed. | ||
* Using the same seed will make the Randomizer to generate | ||
* the same sequence of random values. | ||
*/ | ||
public class PredictableRandomizer implements Randomizer { | ||
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private final Random rnd; | ||
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private final Faker faker; | ||
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public PredictableRandomizer( long seed ) | ||
{ | ||
this.rnd = new Random( seed ); | ||
this.faker = new Faker( rnd ); | ||
} | ||
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@Override | ||
public Random getRandom() { | ||
return this.rnd; | ||
} | ||
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@Override | ||
public int randomInt(int bound) | ||
{ | ||
return rnd.nextInt(bound); | ||
} | ||
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@Override | ||
public <T> List<T> randomElementsFromList( List<T> list, int size ) | ||
{ | ||
List<T> copiedList = new ArrayList<>(list); | ||
List<T> resultList = new ArrayList<>(); | ||
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for ( int i = 0; i < size && !copiedList.isEmpty(); i++) { | ||
T randomElementFromList = randomElementFromList( copiedList ); | ||
resultList.add( copiedList.get( copiedList.indexOf( randomElementFromList ) ) ); | ||
copiedList.remove( randomElementFromList ); | ||
} | ||
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return resultList; | ||
} | ||
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@Override | ||
public String randomString() | ||
{ | ||
return this.faker.programmingLanguage().name(); | ||
} | ||
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public String randomString( int size ) | ||
{ | ||
return this.faker.lorem().characters( size, true, false ); | ||
} | ||
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public int randomIntInRange( int min, int max ) | ||
{ | ||
return this.faker.number().numberBetween( min, max ); | ||
} | ||
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@Override | ||
public double randomDoubleInRange( int min, int max, int decimals ) | ||
{ | ||
return this.faker.number().randomDouble( decimals, min, max ); | ||
} | ||
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@Override | ||
public boolean randomBoolean() | ||
{ | ||
return this.faker.bool().bool(); | ||
} | ||
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@Override | ||
public String randomUsername() { | ||
return this.faker.name().username(); | ||
} | ||
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@Override | ||
public String randomFirstName() { | ||
return this.faker.name().firstName(); | ||
} | ||
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@Override | ||
public String randomLastName() { | ||
return this.faker.name().lastName(); | ||
} | ||
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@Override | ||
public String randomAddress() { | ||
return this.faker.address().fullAddress(); | ||
} | ||
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@Override | ||
public String randomNationalId() { | ||
return this.faker.idNumber().valid(); | ||
} | ||
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@Override | ||
public Date randomBirthday() { | ||
return this.faker.date().birthday( 18, 80 ); | ||
} | ||
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@Override | ||
public String randomLongText( int wordCount ) { | ||
return this.faker.lorem().sentence( wordCount ); | ||
} | ||
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@Override | ||
public String randomPhoneNumber() { | ||
return this.faker.phoneNumber().phoneNumber(); | ||
} | ||
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@Override | ||
public Date randomFutureDate() | ||
{ | ||
return this.faker.date().future( 1825, TimeUnit.DAYS ); | ||
} | ||
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@Override | ||
public String randomFutureDate( DateTimeFormatter formatter ) | ||
{ | ||
return formatDate( toLocalDate( randomFutureDate() ), formatter ); | ||
} | ||
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@Override | ||
public Date randomPastDate() | ||
{ | ||
return this.faker.date().past( 1825, TimeUnit.DAYS ); | ||
} | ||
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@Override | ||
public String randomPastDate( DateTimeFormatter formatter ) | ||
{ | ||
return formatDate( toLocalDate( randomPastDate() ), formatter ); | ||
} | ||
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@Override | ||
public String randomDate(DateTimeFormatter formatter ) | ||
{ | ||
return formatDate( toLocalDate( getDate() ), formatter ); | ||
} | ||
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private String formatDate(LocalDate localDate, DateTimeFormatter format ) | ||
{ | ||
return localDate.format( format ); | ||
} | ||
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private LocalDate toLocalDate( Date dateToConvert ) | ||
{ | ||
return dateToConvert.toInstant().atZone( ZoneId.systemDefault() ).toLocalDate(); | ||
} | ||
} |
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