#10 - Union and list types¶

Code Generation

Schema

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:annotation>
    <xsd:documentation>
      This example illustrates list and union types.
    </xsd:documentation>
  </xsd:annotation>

  <xsd:element name="sizes" type="SizesType"/>

  <xsd:complexType name="SizesType">
    <xsd:choice maxOccurs="unbounded">
      <xsd:element name="size" type="SizeType"/>
      <xsd:element name="smallSize" type="SmallSizeType"/>
      <xsd:element name="internationalSize" type="InternationalSizeType"/>
      <xsd:element name="availableSizes" type="AvailableSizesType"/>
      <xsd:element name="applicableSizes" type="ApplicableSizesType"/>
    </xsd:choice>
  </xsd:complexType>

  <xsd:simpleType name="SizeType">
    <xsd:union memberTypes="DressSizeType">
      <xsd:simpleType>
        <xsd:restriction base="xsd:token">
          <xsd:enumeration value="small"/>
          <xsd:enumeration value="medium"/>
          <xsd:enumeration value="large"/>
        </xsd:restriction>
      </xsd:simpleType>
    </xsd:union>
  </xsd:simpleType>

  <xsd:simpleType name="DressSizeType">
    <xsd:restriction base="xsd:integer">
      <xsd:minInclusive value="2"/>
      <xsd:maxInclusive value="18"/>
    </xsd:restriction>
  </xsd:simpleType>

  <xsd:simpleType name="SmallSizeType">
    <xsd:restriction base="SizeType">
      <xsd:enumeration value="2"/>
      <xsd:enumeration value="4"/>
      <xsd:enumeration value="6"/>
      <xsd:enumeration value="small"/>
    </xsd:restriction>
  </xsd:simpleType>

  <xsd:simpleType name="InternationalSizeType">
    <xsd:union memberTypes="SizeType">
      <xsd:simpleType>
        <xsd:restriction base="xsd:integer">
          <xsd:minInclusive value="24"/>
          <xsd:maxInclusive value="54"/>
        </xsd:restriction>
      </xsd:simpleType>
    </xsd:union>
  </xsd:simpleType>

  <xsd:simpleType name="AvailableSizesType">
    <xsd:list itemType="SizeType"/>
  </xsd:simpleType>

  <xsd:simpleType name="ApplicableSizesType">
    <xsd:restriction>
      <xsd:simpleType>
        <xsd:list itemType="SizeType"/>
      </xsd:simpleType>
      <xsd:enumeration value="small medium large"/>
      <xsd:enumeration value="2 4 6 8 10 12 14 16 18"/>
    </xsd:restriction>
  </xsd:simpleType>

</xsd:schema>

Models

from dataclasses import dataclass, field
from enum import Enum
from typing import List, Union


class ApplicableSizesType(Enum):
    SMALL_MEDIUM_LARGE = "small medium large"
    VALUE_2_4_6_8_10_12_14_16_18 = "2 4 6 8 10 12 14 16 18"


class SizeTypeValue(Enum):
    SMALL = "small"
    MEDIUM = "medium"
    LARGE = "large"


class SmallSizeType(Enum):
    VALUE_2 = 2
    VALUE_4 = 4
    VALUE_6 = 6
    SMALL = "small"


@dataclass
class SizesType:
    size: List[Union[int, SizeTypeValue]] = field(
        default_factory=list,
        metadata={
            "type": "Element",
            "namespace": "",
            "min_inclusive": 2,
            "max_inclusive": 18,
        }
    )
    small_size: List[SmallSizeType] = field(
        default_factory=list,
        metadata={
            "name": "smallSize",
            "type": "Element",
            "namespace": "",
        }
    )
    international_size: List[Union[int, SizeTypeValue]] = field(
        default_factory=list,
        metadata={
            "name": "internationalSize",
            "type": "Element",
            "namespace": "",
            "min_inclusive": 24,
            "max_inclusive": 54,
        }
    )
    available_sizes: List[List[Union[int, SizeTypeValue]]] = field(
        default_factory=list,
        metadata={
            "name": "availableSizes",
            "type": "Element",
            "namespace": "",
            "min_inclusive": 2,
            "max_inclusive": 18,
            "tokens": True,
        }
    )
    applicable_sizes: List[ApplicableSizesType] = field(
        default_factory=list,
        metadata={
            "name": "applicableSizes",
            "type": "Element",
            "namespace": "",
        }
    )


@dataclass
class Sizes(SizesType):
    class Meta:
        name = "sizes"

Data Binding

Original XML Document

<sizes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:noNamespaceSchemaLocation="chapter11.xsd">
  <size>12</size>
  <size>medium</size>
  <smallSize>6</smallSize>
  <smallSize>small</smallSize>
  <internationalSize>12</internationalSize>
  <internationalSize>24</internationalSize>
  <internationalSize>large</internationalSize>
  <availableSizes>10 large 2</availableSizes>
  <applicableSizes>small medium large</applicableSizes>
</sizes>

xsData XML Output

<sizes>
  <size>12</size>
  <size>medium</size>
  <smallSize>6</smallSize>
  <smallSize>small</smallSize>
  <internationalSize>12</internationalSize>
  <internationalSize>24</internationalSize>
  <internationalSize>large</internationalSize>
  <availableSizes>10 large 2</availableSizes>
  <applicableSizes>small medium large</applicableSizes>
</sizes>

xsData JSON Output

{
    "size": [
        12,
        "medium"
    ],
    "smallSize": [
        6,
        "small"
    ],
    "internationalSize": [
        12,
        24,
        "large"
    ],
    "availableSizes": [
        [
            10,
            "large",
            2
        ]
    ],
    "applicableSizes": [
        "small medium large"
    ]
}

Samples Source