CCL File Creation

The example below performs the necessary initialization and demonstrates how to create a new CCL file named hello.ccl with a single CREATE INPUT STREAM CCL statement. Note that all the Java code is necessary for file creation except for the three lines involving the Input Stream statement.

package com.sybase.esp.ccl.example1;

import java.io.File;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.xtext.resource.SaveOptions;
import org.eclipse.xtext.resource.XtextResourceSet;

import com.sybase.esp.CclStandaloneSetup;
import com.sybase.esp.ccl.CclFactory;
import com.sybase.esp.ccl.CclPackage;
import com.sybase.esp.ccl.InputStream;
import com.sybase.esp.ccl.Statements;

public class HelloCcl {
	
	public static void main(String[] args) {
		// This call must be made once in order to use the CCL API.
		CclStandaloneSetup.doSetup();
		
		// The file to be created. If it exists, remove it.
		String theFile = "hello.ccl";
		File cclFile = new File(theFile);
		if(cclFile.exists())
		{
			cclFile.delete();
		}

		// Ccl elements need to be placed in a Resource which is 
		// within a ResourceSet. This is default EMF behavior. 
		XtextResourceSet myResourceSet = new XtextResourceSet();
		URI uri = URI.createFileURI(theFile);
		Resource resource = myResourceSet.createResource(uri);
		
		// Use the CclFactory to create new Ccl elements, this is a
		// standard way EMF creates new elements in the Ccl API.
		CclFactory fact = CclPackage.eINSTANCE.getCclFactory();

		// Statements is the root object for the Ccl model.
		// Create one and add it to the Resource.
		Statements root = fact.createStatements();
		resource.getContents().add(root);
		
		// Create and name the InputStream.
		InputStream theInput  = fact.createInputStream();
		theInput.setName("NewInput");
		
		// Add the InputStream to the Stmts collection.
		root.getStmts().add(theInput);
		
		
		// Save an EMF Resource named hello.ccl
		try
		{
			SaveOptions saveOptions = SaveOptions.newBuilder().getOptions();
			resource.save(saveOptions.toOptionsMap());	
		}
		catch(Exception e)
		{
			System.out.println(e.getMessage());
		}
	}
}

The output file of the above example, hello.ccl, contains a single CCL statement and can be seen below.

CREATE INPUT STREAM NewInput ;