Eclipse XSD 生成枚舉類型的Schema的實例詳解

前言：

因為網上關于Eclipse XSD的中文資料比較少，而且關于Eclipse XSD的范例代碼也鳳毛麟角，但是有的時候我們需要生成一個帶枚舉限定的簡單類型的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"> 代表的就是一個帶枚舉限定的簡單類型。那么應該如何生成呢？請見參考下面的代碼。

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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