Quick Start: Handling a form containing a calculation script using web service API

The following code example processes a form that contains a calculation script and writes the results back to the client web browser. (See Calculating Form Data.)

/*

 * Ensure that you create the Java proxy classes to use 

 * base64 encoding. This is required to populate a BLOB 

 * object with data or retrieve data from a BLOB object.

 * 

 * For information, see "Creating Java proxy classes using Apache Axis" 

 * in Programming with LiveCycle ES.  

 */

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import javax.servlet.Servlet;

import javax.servlet.ServletException;

import javax.servlet.ServletOutputStream;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.adobe.idp.services.BLOB;

import com.adobe.idp.services.FormsResult;

import com.adobe.idp.services.FormsService;

import com.adobe.idp.services.FormsServiceServiceLocator;

import com.adobe.idp.services.RenderOptionsSpec;

import com.adobe.idp.services.holders.BLOBHolder;

import com.adobe.idp.services.holders.FormsResultHolder;

import com.adobe.idp.services.holders.MyArrayOf_xsd_anyTypeHolder;

public class CalculateDataWS extends HttpServlet implements Servlet {

		public void doGet(HttpServletRequest req, HttpServletResponse resp)

		throws ServletException, IOException {

			doPost(req,resp);

	}

	public void doPost(HttpServletRequest req, HttpServletResponse resp)

		throws ServletException, IOException {

		try{

			//Create a FormsService object

			com.adobe.idp.services.FormsServiceServiceLocator sl = new FormsServiceServiceLocator();

			FormsService formsOb = sl.getFormsService();

			((javax.xml.rpc.Stub)formsOb)._setProperty(javax.xml.rpc.Stub.

			USERNAME_PROPERTY, "administrator");

			((javax.xml.rpc.Stub)formsOb)._setProperty(javax.xml.rpc.Stub.

			PASSWORD_PROPERTY, "password");

			//Create a BLOB object to pass

			//to processFormSubmission

			BLOB inForm = new BLOB(); 

			//Get the input stream passed to the servlet and copy

			//its contents into a byte array

		  	int readBytes = -1;

		  	int bufLength = req.getContentLength();

		  	InputStream input = req.getInputStream();

		  	byte[] buffer = new byte[bufLength];

		  	ByteArrayOutputStream output = new ByteArrayOutputStream(bufLength);

		  	while((readBytes = input.read(buffer, 0, bufLength)) != -1) {

		  		output.write(buffer, 0, readBytes);

		 	 }

		  	byte[] finalOutput = output.toByteArray();

			//Populate the BLOB object 

			inForm.setBinaryData(finalOutput);

		    //Set run-time options

		    RenderOptionsSpec processSpec = new RenderOptionsSpec();

		    processSpec.setLocale("en_US");

			//Specify user agent values

			String agent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1;.NET CLR 1.1.4322)";

			//Specify env values

			String envValues = "CONTENT_TYPE=application/pdf&CONTENT_TYPE=application/vnd.adobe.xdp+xml";

			//Create class holders to pass to ProcessFormSubmission

			BLOBHolder outProcessFormSubmissionResultDoc = new BLOBHolder(); 

			javax.xml.rpc.holders.StringHolder clickedButton = new javax.xml.rpc.holders.StringHolder();

			BLOBHolder outXML = new BLOBHolder();

			BLOBHolder validationErrorsList = new BLOBHolder();

			javax.xml.rpc.holders.ShortHolder action = new javax.xml.rpc.holders.ShortHolder(); 

			MyArrayOf_xsd_anyTypeHolder attachments = new MyArrayOf_xsd_anyTypeHolder();

			FormsResultHolder processFormSubmissionResult = new FormsResultHolder(); 

			//Invoke the processFormSubmission method

		  	formsOb.processFormSubmission(

				inForm,

				envValues ,

				agent,

				processSpec,

				outProcessFormSubmissionResultDoc,

				clickedButton,

				outXML,

				validationErrorsList,

				action,

				attachments,

				processFormSubmissionResult);

			//Get the FormResult from the FormsResultHolder	

			FormsResult formResult = processFormSubmissionResult.value ; 

			//Get the processing state

		 	short processState = formResult.getAction();

		 	//Determine if the form data is calculated

			if (processState == 1)

		  	{

				//Get the BLOB object that represents the processed form

			 	BLOB formData= formResult.getOutputContent();

			 	//Get the content type of the response and

				//set the HttpServletResponse object’s content type

				String contentType = formData.getContentType();

				resp.setContentType(contentType);

				//Create a ServletOutputStream object

				ServletOutputStream oOutput = resp.getOutputStream();

				//Create a byte array that stores form data in the BLOB object

				byte[] cContent = formData.getBinaryData();

				//Write a byte stream back to the web browser. 

				//Pass the byte array

				oOutput.write(cContent);

				  }

		}catch (Exception e) {

			 System.out.println("The following error occurred during this operation " +e.getMessage());

		}

	}

}

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