Java 将XML属性的值限制为不同的属性';s/element';s值
我将从一个例子开始Java 将XML属性的值限制为不同的属性';s/element';s值,java,xml,jaxb,xsd,Java,Xml,Jaxb,Xsd,我将从一个例子开始 <template> <components> <component name="switch" /> <component name="server" /> </components> <layout> <grid> <position componentName="switch" positionX="0" positionY="0"
<template>
<components>
<component name="switch" />
<component name="server" />
</components>
<layout>
<grid>
<position componentName="switch" positionX="0" positionY="0" />
</grid>
</layout>
</template>
我想要的是限制
componentName
属性中的值与上面在components
中指定的名称之一相匹配。这在JAXB中可能吗?因为我需要有注释类,然后这些类用于生成XSD。给定您的场景,XSD1.0可以通过一个key/keyref组合来强制您的“引用完整性”。但是,我不知道JAXB中这些构造有什么注释(听起来好像您正在考虑从Java类生成XSD);至少我从未遇到过这样的注释(见列表)
<?xml version="1.0" encoding="utf-8"?>
<!--XML Schema generated by QTAssistant/XML Schema Refactoring (XSR) Module (http://www.paschidev.com)-->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="template">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="components">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" name="component">
<xsd:complexType>
<xsd:attribute name="name" type="xsd:string" use="required" />
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="layout">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="grid">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="position">
<xsd:complexType>
<xsd:attribute name="componentName" type="xsd:string" use="required" />
<xsd:attribute name="positionX" type="xsd:unsignedByte" use="required" />
<xsd:attribute name="positionY" type="xsd:unsignedByte" use="required" />
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
<xsd:key name="ComponentsKey">
<xsd:selector xpath="components/component"/>
<xsd:field xpath="@name"/>
</xsd:key>
<xsd:keyref name="MatchComponent" refer="ComponentsKey">
<xsd:selector xpath="layout/grid/position"/>
<xsd:field xpath="@componentName"/>
</xsd:keyref>
</xsd:element>
</xsd:schema>