Oracle8i Application Developer's Guide - XML Release 3 (8.1.7) Part Number A86030-01 |
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Using XML Java Class Generator, 7 of 8
To run the sample program, use the following command from the sample/ directory:
make target 'demo'
Then follow these three steps to run the sample code:
SampleMain
to generate the Java source files.
Set the CLASSPATH to contain 'classgen.jar', 'xmlparserv2.jar', and current directory.
or
The following example, widl.ddt
is the DTD file referenced by the XML file widl.xml
.
<!ELEMENT WIDL ( SERVICE | BINDING )* > <!ATTLIST WIDL NAME CDATA #IMPLIED VERSION (1.0 | 2.0 | ...) "2.0" BASEURL CDATA #IMPLIED OBJMODEL (wmdom | ...) "wmdom" > <!ELEMENT SERVICE EMPTY> <!ATTLIST SERVICE NAME CDATA #REQUIRED URL CDATA #REQUIRED METHOD (Get | Post) "Get" INPUT CDATA #IMPLIED OUTPUT CDATA #IMPLIED > <!ELEMENT BINDING ( VARIABLE | CONDITION | REGION )* > <!ATTLIST BINDING NAME CDATA #REQUIRED TYPE (Input | Output) "Output" > <!ELEMENT VARIABLE EMPTY> <!ATTLIST VARIABLE NAME CDATA #REQUIRED TYPE (String | String1 | String2) "String" USAGE (Function | Header | Internal) "Function" VALUE CDATA #IMPLIED MASK CDATA #IMPLIED NULLOK (True | False) #REQUIRED > <!ELEMENT CONDITION EMPTY> <!ATTLIST CONDITION TYPE (Success | Failure | Retry) "Success" REF CDATA #REQUIRED MATCH CDATA #REQUIRED SERVICE CDATA #IMPLIED > <!ELEMENT REGION EMPTY> <!ATTLIST REGION NAME CDATA #REQUIRED START CDATA #REQUIRED END CDATA #REQUIRED >
This XML file inputs SampleMain.java:
<?xml version="1.0"?> <!DOCTYPE WIDL SYSTEM "Widl.dtd"> <WIDL> <SERVICE NAME="sname" URL="surl"/> <BINDING NAME="bname"/> </WIDL>
SampleMain.java
generates a Java source file based on the input DTD, widl.ddt
or widl.xml
.
import java.io.*; import java.net.*; import oracle.xml.parser.v2.*; import oracle.xml.classgen.*; import org.w3c.dom.Element; /** * Sample Class to uses XML Class Generator */ public class SampleMain { public SampleMain() { } public static void main (String args[]) { // validate arguments if (args.length < 1) { System.out.println("Usage: java SampleMain "+ "[-root <rootName>] <fileName>"); System.out.println("fileName\t Input file, XML document or " + "external DTD file"); System.out.println("-root <rootName> Name of the root Element " + "(required if the input file is an external DTD)"); return ; } try // to open the XML File/ External DTD File { // instantiate the parser DOMParser parser = new DOMParser(); XMLDocument doc = null; DTD dtd = null; if (args.length == 3) { parser.parseDTD(fileToURL(args[2]), args[1]); dtd = (DTD)parser.getDoctype(); } else { parser.setValidationMode(true); parser.parse(fileToURL(args[0])); doc = parser.getDocument(); dtd = (DTD)doc.getDoctype(); } String doctype_name = null; if (args.length == 3) { doctype_name = args[1]; } else { /* get the Root Element name from the XMLDocument*/ doctype_name = doc.getDocumentElement().getTagName(); } // generate the Java files... ClassGenerator generator = new ClassGenerator(); // set generate comments to true generator.setGenerateComments(true); // set output directory generator.setOutputDirectory("."); // set validating mode to true generator.setValidationMode(true); // generate java src generator.generate(dtd, doctype_name); } catch (Exception e) { System.out.println ("XML Class Generator: Error " + e.toString()); e.printStackTrace(); } } static public URL fileToURL(String sfile) { File file = new File(sfile); String path = file.getAbsolutePath(); String fSep = System.getProperty("file.separator"); if (fSep != null && fSep.length() == 1) path = path.replace(fSep.charAt(0), '/'); if (path.length() > 0 && path.charAt(0) != '/') path = '/' + path; try { return new URL("file", null, path); } catch (java.net.MalformedURLException e) { /* According to the spec this could only happen if the file protocol were not recognized. */ throw new Error("unexpected MalformedURLException"); } } }
TestWidl.java constructs an XML document using the Java source files generated by SampleMain.java.
import oracle.xml.classgen.*; import oracle.xml.parser.v2.*; public class TestWidl { public static void main (String args[]) { try { WIDL w1 = new WIDL(); DTD dtd = w1.getDTDNode(); w1.setNAME("WIDL1"); w1.setVERSION(WIDL.VERSION_1_0); SERVICE s1 = new SERVICE("Service1", "Service_URL"); s1.setINPUT("File"); s1.setOUTPUT("File"); BINDING b1 = new BINDING("Binding1"); b1.setTYPE(BINDING.TYPE_INPUT); BINDING b2 = new BINDING("Binding2"); b2.setTYPE(BINDING.TYPE_OUTPUT); VARIABLE v1 = new VARIABLE("Variable1", VARIABLE.NULLOK_FALSE); v1.setTYPE(VARIABLE.TYPE_STRING); v1.setUSAGE(VARIABLE.USAGE_INTERNAL); v1.setVALUE("value"); VARIABLE v2 = new VARIABLE("Variable2", VARIABLE.NULLOK_TRUE); v2.setTYPE(VARIABLE.TYPE_STRING1); v2.setUSAGE(VARIABLE.USAGE_HEADER); VARIABLE v3 = new VARIABLE("Variable3", VARIABLE.NULLOK_FALSE); v3.setTYPE(VARIABLE.TYPE_STRING2); v3.setUSAGE(VARIABLE.USAGE_FUNCTION); v3.setMASK("mask"); CONDITION c1 = new CONDITION("CRef1", "CMatch1"); c1.setSERVICE("Service1"); c1.setTYPE(CONDITION.TYPE_SUCCESS); CONDITION c2 = new CONDITION("CRef2", "CMatch2"); c2.setTYPE(CONDITION.TYPE_RETRY); CONDITION c3 = new CONDITION("CRef3", "CMatch3"); c3.setSERVICE("Service3"); c3.setTYPE(CONDITION.TYPE_FAILURE); REGION r1 = new REGION("Region1", "Start", "End"); b1.addNode(r1); b1.addNode(v1); b1.addNode(c1); b1.addNode(v2); b2.addNode(c2); b2.addNode(v3); w1.addNode(s1); w1.addNode(b1); w1.addNode(b2); w1.validateContent(); w1.print(System.out); } catch (Exception e) { System.out.println(e.toString()); e.printStackTrace(); } } }
This XML file, widl.out, is constructed and printed by TestWidl.java.
<?xml version = '1.0' encoding = 'ASCII'?> <!DOCTYPE WIDL SYSTEM "file:/oracore/java/xml/ORACORE_MAIN_SOLARIS_990115_ XMLCLASSGEN/sample/out/WIDL.dtd"> <WIDL NAME="WIDL1" VERSION="1.0"> <SERVICE NAME="Service1" URL="Service_URL" INPUT="File" OUTPUT="File"/> <BINDING NAME="Binding1" TYPE="Input"> <REGION NAME="Region1" START="Start" END="End"/> <VARIABLE NAME="Variable1" NULLOK="False" TYPE="String" USAGE="Internal" VALUE="value"/> <CONDITION REF="CRef1" MATCH="CMatch1" SERVICE="Service1" TYPE="Success"/> <VARIABLE NAME="Variable2" NULLOK="True" TYPE="String1" USAGE="Header"/> </BINDING> <BINDING NAME="Binding2" TYPE="Output"> <CONDITION REF="CRef2" MATCH="CMatch2" TYPE="Retry"/> <VARIABLE NAME="Variable3" NULLOK="False" TYPE="String2" USAGE="Function" MASK="mask"/> </BINDING> </WIDL>
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