Detailed description of the Schema instance generated by Eclipse XSD for Enumeration type, xsdschema

Detailed description of the Schema instance generated by Eclipse XSD for Enumeration type, xsdschema

Detailed description of the Schema instance generated by Eclipse XSD for Enumeration type

Preface:

Because there are few Chinese documents on Eclipse XSD on the Internet, and the sample code for Eclipse XSD is rare, sometimes we need to generate a simple type XSD Schema with enumeration restrictions, for example, the following format,

<?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> 

<SimpleType name = "AlignmentType"> indicates a simple type with enumeration restrictions. So how should we generate it? See the following code.

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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