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MartinFiordeMartinFiorde
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Revert "Ejemplos no usados en clase, borrados"
This reverts commit cb94352.
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‎modules/src/main/java/com/platzi/functional/_10_chaining/Chaining.java‎

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package com.platzi.functional._10_chaining;
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import com.platzi.functional._10_chaining.builder.BuilderNoChaining;
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import com.platzi.functional._10_chaining.builder.BuilderWithChaining;
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import com.platzi.functional._10_chaining.data.Account;
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import java.util.function.Function;
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public class Chaining {
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/**
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* Aunque el chaining no es algo exclusivo o a conocer de la programacion funcional,
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* vale la pena mencionarlo, puesto que puede ser de ayuda al usar funciones de java o
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* en temas futuros…
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* <p>
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* Chaining es la estrategia de retornar siempre un objeto, tal que puedas invocar
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* metodos con cada invocacion.
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*/
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static void examplesOfChaining() {
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//Cuando no usas chaining tu codigo se ve aburrido y repetitivo
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BuilderNoChaining builderNoChaining = new BuilderNoChaining("");
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builderNoChaining.withBalance(100.00);
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builderNoChaining.withFirstName("Sinuhe");
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builderNoChaining.withLastName("Jaime");
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builderNoChaining.withPhone("+52155555555");
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Account sinuheAccount = builderNoChaining.buildAccount();
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//Pero con un buen chaining puedes hacer las cosas mas simples.
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Account anotherAccount =
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new BuilderWithChaining("1")
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.withBalance(100.00)
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.withFirstName("Sinuhe")
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.withLastName("Jaime")
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.withPhone("+52155555555")
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.buildAccount();
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//Es relativamente comun verlo en Strings:
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char[] saludo = "Bye Platzi!".replaceAll("Bye", "Hola")
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.toLowerCase()
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.toCharArray();
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//O como en el primer ejemplo, con builders…
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StringBuilder builderJava = new StringBuilder()
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.append("E").append("s").append("t").append("o").append("y")
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.append(" ")
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.append("A")
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.append("p")
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.append("r")
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.append("e")
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.append("n")
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.append("d")
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.append("i")
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.append("e")
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.append("n")
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.append("d")
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.append("o")
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.append(" Java ")
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.append(8);
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System.out.println(builderJava.toString());
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//La reelevancia en este curso, de esta estrategia, viene al crear funciones mas complejas
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//o que se crean a partir de otras funciones. Posteriormente veremos que es de mucha utilidad
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//con ciertos tipos de datos.
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//Por ejemplo, creamos una funcion que reemplace las "f" por asteriscos
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Function<String, String> replacer = s -> s.replaceAll("f", "*");
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Function<Function<String, String>, Function<String, String>> replacerPlus =
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f -> f.andThen(s -> s.replaceAll("a", "/"));
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System.out.println(
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replacerPlus
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.apply(replacer)
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.andThen(s -> s.replaceFirst("Ho", "Mo"))
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.apply("Hablando de chaining, esto Hola, fucho")
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);
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}
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}

‎modules/src/main/java/com/platzi/functional/_10_chaining/builder/BuilderNoChaining.java‎

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package com.platzi.functional._10_chaining.builder;
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import com.platzi.functional._10_chaining.data.Account;
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import com.platzi.functional._10_chaining.data.Phone;
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public class BuilderNoChaining {
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private String id;
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private String firstName;
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private String lastName;
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private double currentBalance;
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private Phone phone;
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public BuilderNoChaining(String id) {
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checkStringField(id, "ID");
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this.id = id;
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firstName = "";
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lastName = "";
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currentBalance = 0.0;
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phone = null;
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}
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public void withFirstName(String firstName) {
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checkStringField(firstName, "First Name");
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this.firstName = firstName;
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}
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public void withLastName(String lastName) {
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checkStringField(lastName, "First Name");
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this.lastName = lastName;
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}
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public void withBalance(double balance) {
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currentBalance = balance;
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}
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public void withPhone(String phone){
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checkStringField(phone, "Phone");
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this.phone = new Phone(phone);
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}
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public Account buildAccount() {
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return new Account(
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id,
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firstName,
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lastName,
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currentBalance,
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phone
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);
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}
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private void checkStringField(String field, String fieldName) {
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if (field == null || field.length() == 0) {
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throw new IllegalArgumentException(fieldName + " is not valid");
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}
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}
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}

‎modules/src/main/java/com/platzi/functional/_10_chaining/builder/BuilderWithChaining.java‎

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package com.platzi.functional._10_chaining.builder;
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import com.platzi.functional._10_chaining.data.Account;
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import com.platzi.functional._10_chaining.data.Phone;
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public class BuilderWithChaining {
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private String id;
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private String firstName;
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private String lastName;
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private double currentBalance;
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private Phone phone;
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public BuilderWithChaining(String id) {
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checkStringField(id, "ID");
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this.id = id;
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firstName = "";
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lastName = "";
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currentBalance = 0.0;
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phone = null;
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}
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public BuilderWithChaining withFirstName(String firstName) {
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checkStringField(firstName, "First Name");
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this.firstName = firstName;
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return this;
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}
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public BuilderWithChaining withLastName(String lastName) {
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checkStringField(lastName, "First Name");
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this.lastName = lastName;
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return this;
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}
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public BuilderWithChaining withBalance(double balance) {
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currentBalance = balance;
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return this;
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}
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public BuilderWithChaining withPhone(String phone) {
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checkStringField(phone, "Phone");
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this.phone = new Phone(phone);
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return this;
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}
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public Account buildAccount() {
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return new Account(
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id,
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firstName,
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lastName,
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currentBalance,
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phone
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);
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}
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private void checkStringField(String field, String fieldName) {
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if (field == null || field.length() == 0) {
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throw new IllegalArgumentException(fieldName + " is not valid");
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}
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}
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}

‎modules/src/main/java/com/platzi/functional/_10_chaining/data/Account.java‎

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package com.platzi.functional._10_chaining.data;
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public class Account {
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private String id;
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private String firstName;
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private String lastName;
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private double currentBalance;
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private Phone phone;
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public Account(String id, String firstName, String lastName, double currentBalance, Phone phone) {
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this.id = id;
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this.firstName = firstName;
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this.lastName = lastName;
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this.currentBalance = currentBalance;
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this.phone = phone;
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}
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public String getId() {
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return id;
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}
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public String getFirstName() {
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return firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public double getCurrentBalance() {
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return currentBalance;
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}
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public Phone getPhone() {
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return phone;
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}
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}

‎modules/src/main/java/com/platzi/functional/_10_chaining/data/Address.java‎

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package com.platzi.functional._10_chaining.data;
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public class Address {
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private String street;
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private String interiorNumber;
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private String exteriorNumber;
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private String state;
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private String zip;
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public String getStreet() {
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return street;
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}
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public void setStreet(String street) {
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this.street = street;
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}
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public String getInteriorNumber() {
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return interiorNumber;
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}
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public void setInteriorNumber(String interiorNumber) {
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this.interiorNumber = interiorNumber;
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}
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public String getExteriorNumber() {
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return exteriorNumber;
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}
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public void setExteriorNumber(String exteriorNumber) {
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this.exteriorNumber = exteriorNumber;
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}
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public String getState() {
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return state;
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}
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public void setState(String state) {
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this.state = state;
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}
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public String getZip() {
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return zip;
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}
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public void setZip(String zip) {
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this.zip = zip;
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}
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}

‎modules/src/main/java/com/platzi/functional/_10_chaining/data/Phone.java‎

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package com.platzi.functional._10_chaining.data;
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public class Phone {
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private String country;
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private char[] countryCode;
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private char[] digits;
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public Phone() {
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}
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public Phone(String phoneString) {
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//TODO: Descomponer los valores de un string
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}
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public String getCountry() {
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return country;
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}
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public void setCountry(String country) {
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this.country = country;
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}
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public char[] getCountryCode() {
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return countryCode;
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}
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public void setCountryCode(char[] countryCode) {
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this.countryCode = countryCode;
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}
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public char[] getDigits() {
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return digits;
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}
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public void setDigits(char[] digits) {
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this.digits = digits;
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}
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}

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