Eclipse XSD 生成枚举类型的Schema的实例详解

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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 name="StudentType">     <sequence>      <element maxOccurs="1" minOccurs="1" name="username" type="string"/>      <element maxOccurs="1" minOccurs="1" name="password" type="string"/>      <element maxOccurs="1" minOccurs="1" name="alignment" type="AlignmentType"/>     </sequence>    </complexType>    <simpleType name="AlignmentType">     <restriction base="string">      <enumeration value="RIGHT"/>      <enumeration value="MIDDLE"/>      <enumeration value="LEFT"/>     </restriction>    </simpleType>    <element name="Student" type="StudentType"/>   </schema> 

其中, <SimpleType name="AlignmentType"> 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 name="StudentType">     <sequence>      <element maxOccurs="1" minOccurs="1" name="username" type="string"/>      <element maxOccurs="1" minOccurs="1" name="password" type="string"/>      <element maxOccurs="1" minOccurs="1" name="alignment" type="AlignmentType"/>     </sequence>    </complexType>    <simpleType name="AlignmentType">     <restriction base="string">      <enumeration value="RIGHT"/>      <enumeration value="MIDDLE"/>      <enumeration value="LEFT"/>     </restriction>    </simpleType>    <element name="Student" 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>");   }  } 

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