Eclipse XSD 生成枚举类型的Schema的实例详解
前言：
因为网上关于Eclipse XSD的中文资料比较少，而且关于Eclipse XSD的范例代码也凤毛麟角，但是有的时候我们需要生成一个带枚举限定的简单类型的XSD Schema,比如下面的格式，
<?xml version="1.0" encoding="UTF-8"?><schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.w3.org/2001/XMLSchema"> <complexType> <sequence> <element maxOccurs="1" minOccurs="1" type="string"/> <element maxOccurs="1" minOccurs="1" type="string"/> <element maxOccurs="1" minOccurs="1" type="AlignmentType"/> </sequence> </complexType> <simpleType> <restriction base="string"> <enumeration value="RIGHT"/> <enumeration value="MIDDLE"/> <enumeration value="LEFT"/> </restriction> </simpleType> <element type="StudentType"/> </schema>
其中, <SimpleType> 代表的就是一个带枚举限定的简单类型。那么应该如何生成呢？请见参考下面的代码。
import org.eclipse.xsd.XSDComplexTypeDefinition; import org.eclipse.xsd.XSDCompositor; import org.eclipse.xsd.XSDElementDeclaration; import org.eclipse.xsd.XSDEnumerationFacet; import org.eclipse.xsd.XSDFactory; import org.eclipse.xsd.XSDImport; import org.eclipse.xsd.XSDInclude; import org.eclipse.xsd.XSDModelGroup; import org.eclipse.xsd.XSDParticle; import org.eclipse.xsd.XSDRedefine; import org.eclipse.xsd.XSDSchema; import org.eclipse.xsd.XSDSchemaDirective; import org.eclipse.xsd.XSDSimpleTypeDefinition; import org.eclipse.xsd.util.XSDResourceImpl; import org.eclipse.xsd.util.XSDUtil; import org.junit.Test; import org.w3c.dom.Element; public class EnumFacetTest { protected static XSDFactory xsdFactory = XSDFactory.eINSTANCE; private void createAligementElement(XSDSimpleTypeDefinition aligmentType){ String[] cellAligements={"RIGHT","MIDDLE","LEFT"}; for(int i=0;i<cellAligements.length;i++){ XSDEnumerationFacet alEnum=XSDFactory.eINSTANCE.createXSDEnumerationFacet(); alEnum.setLexicalValue(cellAligements[i]); //aligmentType.getFacets().add(alEnum); aligmentType.getFacetContents().add(alEnum); } } /** <?xml version="1.0" encoding="UTF-8"?><schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.w3.org/2001/XMLSchema"> <complexType> <sequence> <element maxOccurs="1" minOccurs="1" type="string"/> <element maxOccurs="1" minOccurs="1" type="string"/> <element maxOccurs="1" minOccurs="1" type="AlignmentType"/> </sequence> </complexType> <simpleType> <restriction base="string"> <enumeration value="RIGHT"/> <enumeration value="MIDDLE"/> <enumeration value="LEFT"/> </restriction> </simpleType> <element type="StudentType"/> </schema> */ @Test public void EnumFacetTest() { String targeNameSpace="http://www.w3.org/2001/XMLSchema"; XSDSchema xsdSchema=xsdFactory.createXSDSchema(); xsdSchema.setTargetNamespace(targeNameSpace); xsdSchema.getQNamePrefixToNamespaceMap().put(null, "http://www.w3.org/2001/XMLSchema"); //1.1 Create Complex type:student XSDComplexTypeDefinition complexTypeDef = xsdFactory.createXSDComplexTypeDefinition(); complexTypeDef.setTargetNamespace(xsdSchema.getTargetNamespace()); complexTypeDef.setName("StudentType"); XSDParticle xsdParticle=xsdFactory.createXSDParticle(); XSDModelGroup xsdModuleGroup=xsdFactory.createXSDModelGroup(); xsdModuleGroup.setCompositor(XSDCompositor.SEQUENCE_LITERAL); xsdParticle.setContent(xsdModuleGroup); complexTypeDef.setContent(xsdParticle); complexTypeDef.setContentType(xsdParticle); xsdSchema.getContents().add(complexTypeDef); //1.2 Add element for complex type //1.2.1 username element XSDParticle localXSDParticle = xsdFactory.createXSDParticle(); localXSDParticle.setMinOccurs(1); localXSDParticle.setMaxOccurs(1); XSDElementDeclaration localXSDElementDeclaration = xsdFactory.createXSDElementDeclaration(); localXSDElementDeclaration.setTargetNamespace(targeNameSpace); localXSDElementDeclaration.setName("username"); XSDSchema localXSDSchema = XSDUtil.getSchemaForSchema("http://www.w3.org/2001/XMLSchema"); XSDSimpleTypeDefinition localSimpleType=localXSDSchema.resolveSimpleTypeDefinition("string"); localXSDElementDeclaration.setTypeDefinition(localSimpleType); localXSDParticle.setContent(localXSDElementDeclaration); xsdModuleGroup.getContents().add(localXSDParticle); //1.2.2 password element localXSDParticle = xsdFactory.createXSDParticle(); localXSDParticle.setMinOccurs(1); localXSDParticle.setMaxOccurs(1); localXSDElementDeclaration = xsdFactory.createXSDElementDeclaration(); localXSDElementDeclaration.setTargetNamespace(targeNameSpace); localXSDElementDeclaration.setName("password"); localXSDSchema = XSDUtil.getSchemaForSchema("http://www.w3.org/2001/XMLSchema"); localSimpleType=localXSDSchema.resolveSimpleTypeDefinition("string"); localXSDElementDeclaration.setTypeDefinition(localSimpleType); localXSDParticle.setContent(localXSDElementDeclaration); xsdModuleGroup.getContents().add(localXSDParticle); //1.2.3.1 Create Simple Type with XSDEnumerationFacet--------------- XSDSimpleTypeDefinition xsdSimpleTypeDefinition = XSDFactory.eINSTANCE.createXSDSimpleTypeDefinition(); XSDSimpleTypeDefinition baseTypeDefinition = xsdSchema.resolveSimpleTypeDefinitionURI("string"); xsdSimpleTypeDefinition.setBaseTypeDefinition(baseTypeDefinition); xsdSimpleTypeDefinition.setName("AlignmentType"); createAligementElement(xsdSimpleTypeDefinition); xsdSchema.getContents().add(xsdSimpleTypeDefinition); //1.2.3.2 Create element with Simple Type -------------- localXSDParticle = xsdFactory.createXSDParticle(); localXSDParticle.setMinOccurs(1); localXSDParticle.setMaxOccurs(1); localXSDElementDeclaration = xsdFactory.createXSDElementDeclaration(); localXSDElementDeclaration.setTargetNamespace(targeNameSpace); localXSDElementDeclaration.setName("alignment"); localXSDSchema = XSDUtil.getSchemaForSchema("http://www.w3.org/2001/XMLSchema"); localXSDElementDeclaration.setTypeDefinition(xsdSimpleTypeDefinition); localXSDParticle.setContent(localXSDElementDeclaration); xsdModuleGroup.getContents().add(localXSDParticle); //2.Create XSDElementDeclaration and attached complex type to XSD element XSDElementDeclaration xsdEelement=xsdFactory.createXSDElementDeclaration(); xsdEelement.setName("Student"); xsdEelement.setTypeDefinition(complexTypeDef); xsdSchema.getContents().add(xsdEelement); //3.Print Schema SchemaPrintService.printSchema(xsdSchema); } } class SchemaPrintService { /** * print schema to console * * @param xsdSchema */ public static void printSchema(XSDSchema xsdSchema) { System.out.println("<!-- ===== Schema Composition ====="); printDirectives(" ", xsdSchema); System.out.println("-->"); System.out .println("<!-- [ " + xsdSchema.getSchemaLocation() + " ] -->"); xsdSchema.updateElement(); Element element = xsdSchema.getElement(); if (element != null) { // Print the serialization of the model. XSDResourceImpl.serialize(System.out, element); } } private static void printSchemaStart(XSDSchema xsdSchema) { System.out.print("<schema targetNamespace=\""); if (xsdSchema.getTargetNamespace() != null) { System.out.print(xsdSchema.getTargetNamespace()); } System.out.print("\" schemaLocation=\""); if (xsdSchema.getSchemaLocation() != null) { System.out.print(xsdSchema.getSchemaLocation()); } System.out.print("\">"); } private static void printDirectives(String indent, XSDSchema xsdSchema) { System.out.print(indent); printSchemaStart(xsdSchema); System.out.println(); if (!xsdSchema.getReferencingDirectives().isEmpty()) { System.out.println(indent + " <referencingDirectives>"); for (XSDSchemaDirective xsdSchemaDirective : xsdSchema .getReferencingDirectives()) { XSDSchema referencingSchema = xsdSchemaDirective.getSchema(); System.out.print(indent + " "); printSchemaStart(referencingSchema); System.out.println(); System.out.print(indent + " "); if (xsdSchemaDirective instanceof XSDImport) { XSDImport xsdImport = (XSDImport) xsdSchemaDirective; System.out.print("<import namespace=\""); if (xsdImport.getNamespace() != null) { System.out.print(xsdImport.getNamespace()); } System.out.print("\" schemaLocation=\""); } else if (xsdSchemaDirective instanceof XSDRedefine) { System.out.print("<redefine schemaLocation=\""); } else if (xsdSchemaDirective instanceof XSDInclude) { System.out.print("<include schemaLocation=\""); } if (xsdSchemaDirective.getSchemaLocation() != null) { System.out.print(xsdSchemaDirective.getSchemaLocation()); } System.out.println("\"/>"); System.out.println(indent + " </schema>"); } System.out.println(indent + " </referencingDirectives>"); } if (!xsdSchema.getIncorporatedVersions().isEmpty()) { System.out.println(indent + " <incorporatedVersions>"); for (XSDSchema incorporatedVersion : xsdSchema .getIncorporatedVersions()) { printDirectives(indent + " ", incorporatedVersion); } System.out.println(indent + " </incorporatedVersions>"); } System.out.println(indent + "</schema>"); } }