simpleclient.java

数字图书馆的互操作接口

package dli2fe.sample;

import dli2fe.DLI2FEException;
/* holder for integer values */
import dli2fe.helpers.*;
/* following packages are imported only if DOM-aware XMLObjects are used */
/* DLI2FE XML element names */
import dli2fe.DLI2FE;
import org.omg.CORBA.IntHolder;

/**
 * This is the SimpleClient application described in the DLI2FE Java tutorial.
 */


public class SimpleClient {

  public static void main(String args[]) {

    if(args.length != 2) {
      System.err.println("Usage: java dli2fe.sample.SimpleClient <URL_or_IOR> <query text>");
      System.exit(1);
    }

    try {
      /* extract command line parameters */
      String searchServerURI = args[0]; //"dli2fens:http://localhost:9524/";
      String queryStr = args[1];

      /* an DLI2FE/CORBA or DLI2FE/DASL transport module is created
       * depending on whether a URL or an IOR is supplied */
      ClientTransportModule tm = ClientTransportModule.create(searchServerURI);


      /* the result will be held in a DOM-enabled dli2fe.xml.dom.XMLObject */
      SimpleXMLObject result = new SimpleXMLObject();
      /* total expected number of results for this query */
      IntHolder expectedTotal = new IntHolder();

      tm.search(12345,           /* some client SID */
		null,            /* search the default subcollection */
		new SimpleXMLObject("<basicsearch xmlns='DAV:'>" +
			      "  <where><contains>" + queryStr + "</contains></where>" +
			      "</basicsearch>"),
		10,              /* return 10 results only */
		null,            /* retrieve all properties */
		null,            /* no query options */
		expectedTotal,   /* place to return expectedTotal */
		new IntHolder(), /* place to return serverSID - don't care */
		result           /* place to return search result */
		);

      System.out.println("Document: \n" + result.getString() );
      System.out.println("EXPECTED TOTAL: " + expectedTotal.value);

    } catch (DLI2FEException dli2fe) {
      System.err.println("DLI2FE exception (" + dli2fe.getCode() + "): " + dli2fe.getReason());
    }
  }
}