Pet Entity

This Java Class has been created to represent the entity
of a pet.

src/main/java/es/uvigo/esei/daa/entities/Pet.java

+package es.uvigo.esei.daa.entities;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * An entity that represents a pet
+ *
+ * @author albovy
+ */
+public class Pet {
+    private int id;
+    private String name;
+    private String type;
+    private int person;
+
+    //Constructor needed for JSON conversion
+    Pet(){}
+
+    /**
+     * Constructs a new instance of {@link Pet}.
+     *
+     * @param id identifier of the pet.
+     * @param name name of the pet.
+     * @param type specie of the pet.
+     * @param person owner of the pet.
+     */
+    public Pet(int id, String name, String type, int person) {
+        this.id = id;
+        this.setName(name);
+        this.setType(type);
+        this.person = person;
+    }
+
+    /**
+     * Returns the identifier of the pet.
+     *
+     * @return the identifier of the pet.
+     */
+    public int getId() {
+        return id;
+    }
+    /**
+     * Returns the name of the pet.
+     *
+     * @return the name of the pet.
+     */
+    public String getName() {
+        return name;
+    }
+    /**
+     * Returns the specie of the pet.
+     *
+     * @return the specie of the pet.
+     */
+    public String getType() {
+        return type;
+    }
+    /**
+     * Returns the owner of the pet.
+     *
+     * @return the owner of the pet.
+     */
+    public int getPerson() {
+        return person;
+    }
+    /**
+     * Set the name of this pet.
+     *
+     * @param name the new name of the pet.
+     * @throws NullPointerException if the{@code name} is {@code null}.
+     */
+    public void setName(String name) {
+        this.name = requireNonNull(name,"Name can't be null");
+    }
+    /**
+     * Set the specie of the pet.
+     *
+     * @param type the new specie of the pet.
+     * @throws NullPointerException if the{@code type} is {@code null}.
+     */
+    public void setType(String type) {
+        this.type = requireNonNull(type,"Type can't be null");
+    }
+
+    /**
+     * Set the owner of the pet.
+     *
+     * @param person the owner of the pet
+     * @throws  NullPointerException if the {@code person} is {@code null}
+     */
+    public void setPerson(Integer person){
+        this.person = requireNonNull(person,"Person can't be null");
+    }
+
+    @Override
+    public int hashCode(){
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + id;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (!(obj instanceof Pet))
+            return false;
+        Pet other = (Pet) obj;
+        if (id != other.id)
+            return false;
+        return true;
+    }
+}