Add support for INTERFACE object type

[epi-ADN]

Not sure if the select methods for fields belonging to the interface class should be repeated in the possible types.

Example of a parent class generated from an INTERFACE object :

<?php

namespace GraphQL\SchemaObject;

class ChampQueryObject extends UnionObject
{
    const OBJECT_NAME = "Champ";

    public function selectId()
    {
        $this->selectField("id");

        return $this;
    }

    public function selectLabel()
    {
        $this->selectField("label");

        return $this;
    }

    public function selectStringValue()
    {
        $this->selectField("stringValue");

        return $this;
    }

    public function onAddressChamp()
    {
        $object = new AddressChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onCarteChamp()
    {
        $object = new CarteChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onCheckboxChamp()
    {
        $object = new CheckboxChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onCiviliteChamp()
    {
        $object = new CiviliteChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onCommuneChamp()
    {
        $object = new CommuneChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onDateChamp()
    {
        $object = new DateChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onDatetimeChamp()
    {
        $object = new DatetimeChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onDecimalNumberChamp()
    {
        $object = new DecimalNumberChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onDepartementChamp()
    {
        $object = new DepartementChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onDossierLinkChamp()
    {
        $object = new DossierLinkChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onEpciChamp()
    {
        $object = new EpciChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onIntegerNumberChamp()
    {
        $object = new IntegerNumberChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onLinkedDropDownListChamp()
    {
        $object = new LinkedDropDownListChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onMultipleDropDownListChamp()
    {
        $object = new MultipleDropDownListChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onPaysChamp()
    {
        $object = new PaysChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onPieceJustificativeChamp()
    {
        $object = new PieceJustificativeChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onRegionChamp()
    {
        $object = new RegionChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onRepetitionChamp()
    {
        $object = new RepetitionChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onSiretChamp()
    {
        $object = new SiretChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onTextChamp()
    {
        $object = new TextChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }

    public function onTitreIdentiteChamp()
    {
        $object = new TitreIdentiteChampQueryObject();
        $this->addPossibleType($object);

        return $object;
    }
}

Example of one of the possible type "AddressChamp" :

<?php

namespace GraphQL\SchemaObject;

class AddressChampQueryObject extends QueryObject
{
    const OBJECT_NAME = "AddressChamp";

    public function selectAddress(AddressChampAddressArgumentsObject $argsObject = null)
    {
        $object = new AddressQueryObject("address");
        if ($argsObject !== null) {
            $object->appendArguments($argsObject->toArray());
        }
        $this->selectField($object);

        return $object;
    }

    public function selectCommune(AddressChampCommuneArgumentsObject $argsObject = null)
    {
        $object = new CommuneQueryObject("commune");
        if ($argsObject !== null) {
            $object->appendArguments($argsObject->toArray());
        }
        $this->selectField($object);

        return $object;
    }

    public function selectDepartement(AddressChampDepartementArgumentsObject $argsObject = null)
    {
        $object = new DepartementQueryObject("departement");
        if ($argsObject !== null) {
            $object->appendArguments($argsObject->toArray());
        }
        $this->selectField($object);

        return $object;
    }

    public function selectId()
    {
        $this->selectField("id");

        return $this;
    }

    public function selectLabel()
    {
        $this->selectField("label");

        return $this;
    }

    public function selectStringValue()
    {
        $this->selectField("stringValue");

        return $this;
    }
}