This is a simple Java library to parse AppData files. It is used in linux-store-backend
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Create a new maven project
- IntelliJ > File > New > Project
- Maven > Create from archetype: org.apache.maven.archetypes:maven-archetype-quickstart
- GroupID: org.freedesktop.appstream
- ArtifactID: appstream-appdata
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Create an example App Data file xds/appstream-seed.xml
- It contains an example component with most of the appstream spec.
- It's added twice in the file on purpose to tell the system that we'll have a list of components.
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IntelliJ > Select xds/appstream-seed.xml > Generate XSD schema from XML file:
- Result schema file name: appstream.xsd
- Design type: local elements/types
- Detect simple content type: smart
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Rename obtained file appstream-seed.xml1.xsd to appstream-lang.xsd
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Edit xds/appstream.xsd
- Import appstream-lang.xsd
<?xml version="1.0" encoding="UTF-8"?> <xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="appstream-lang.xsd"/>- Manually modify "description" type
# Before <xs:element name="description"> <xs:complexType> <xs:choice maxOccurs="unbounded" minOccurs="0"> <xs:element ref="p"/> <xs:element ref="ul"/> <xs:element ref="ol"/> </xs:choice> <xs:attribute ref="xml:lang"/> </xs:complexType> </xs:element> # After <!-- We manually modify description type to allow mixed content --> <xs:complexType name="description" mixed="true"> <xs:sequence> <xs:element name="p" type="xs:string" maxOccurs="unbounded" minOccurs="0"/> <xs:element ref="ul" minOccurs="0"/> <xs:element ref="ol" minOccurs="0"/> </xs:sequence> <xs:attribute ref="xml:lang"/> </xs:complexType> <xs:element name="description" type="description"/> -
Create bindings using xcj:
cd ROOT_OF_THE_PROJECT
xjc -d src/main/java/ -p org.freedesktop.appstream.appdata xsd/appstream.xsd
mvn install