AbstractConverterHandler.java

package at.bestsolution.efxclipse.tooling.converter;

import java.io.ByteArrayInputStream;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISources;

public abstract class AbstractConverterHandler extends AbstractHandler {
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		IEvaluationContext context = (IEvaluationContext) event.getApplicationContext();
		ISelection s = (ISelection) context.getVariable(ISources.ACTIVE_MENU_SELECTION_NAME);
		if( s instanceof IStructuredSelection ) {
			Object o = ((IStructuredSelection) s).getFirstElement();
			if( o instanceof IFile ) {
				IFile f = (IFile) o;
				String content = convert(f);
				IContainer folder = f.getParent();
				IFile outFile = folder.getFile(new Path(f.getName().substring(0,f.getName().length()-f.getFileExtension().length()-1)+".fxml"));
				if( ! outFile.exists() ) {
					try {
						outFile.create(new ByteArrayInputStream(content.getBytes()), true, new NullProgressMonitor());
					} catch (CoreException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				} else {
					try {
						outFile.setContents(new ByteArrayInputStream(content.getBytes()), IResource.KEEP_HISTORY|IResource.FORCE, new NullProgressMonitor());
					} catch (CoreException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
		}
		return null;
	}
	
	protected abstract String convert(IFile file) throws ExecutionException;
}