列印org.eclipse.xsd.XSDSchema對象

標籤：eclipse xsd   xsdschema   

因為網上關於Eclipse XSD的中文資料比較少，但是有的時候，我們需要使用Eclipse XSD的API去構造或者修改一個XSD檔案。

那麼當我們建立了org.eclipse.xsd.XSDSchema的對象，並已經在裡面添加或者修改許多的元素類型等資訊後，我們想知道我們的添加或者修改是否有效。

那麼這個時候我們應該怎麼辦呢？有兩種方式，我們把產生的org.eclipse.xsd.XSDSchema的對象，寫到一個檔案裡面去，另外一種方式就是直接把XSDSchema對象

轉成一個字串，然後把XSDSchema代碼的XSD列印出來。其代碼代碼方法如下：

import org.eclipse.xsd.XSDImport;import org.eclipse.xsd.XSDInclude;import org.eclipse.xsd.XSDRedefine;import org.eclipse.xsd.XSDSchema;import org.eclipse.xsd.XSDSchemaDirective;import org.eclipse.xsd.util.XSDResourceImpl;import org.w3c.dom.Element;public class SchemaPrintService {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>");}}

列印org.eclipse.xsd.XSDSchema對象