Index: CodeGenerationLaunchDelegate.java
===================================================================
--- CodeGenerationLaunchDelegate.java	(revision 28039)
+++ CodeGenerationLaunchDelegate.java	(working copy)
@@ -26,6 +26,7 @@
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.lang.reflect.Constructor;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
@@ -56,7 +57,6 @@
 import org.eclipse.debug.core.DebugPlugin;
 import org.eclipse.debug.core.ILaunch;
 import org.eclipse.debug.core.ILaunchConfiguration;
-import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
 import org.eclipse.debug.core.model.IProcess;
 import org.eclipse.debug.ui.RefreshTab;
 import org.eclipse.jdt.core.IJavaProject;
@@ -174,6 +174,28 @@
 		createFile(externalPropFileName, propFileContentPreSave);
 	}
 	
+	public class MockLaunchConfig extends LaunchConfigDecorator {
+		
+		protected Map<String, String> tmpAttr = new HashMap<String, String>();
+
+		public MockLaunchConfig(ILaunchConfiguration original) throws CoreException {
+			super(original);
+		}
+
+		public void setTmpAttribute(String attributeName, String value) {
+			tmpAttr.put(attributeName, value);
+		}
+		
+		@Override
+		public String getAttribute(String attributeName, String defaultValue) throws CoreException {
+			String res = tmpAttr.get(attributeName);
+			if (res == null) {
+				res = super.getAttribute(attributeName, defaultValue);
+			}
+			return res;
+		}
+	}
+	
 	/**
 	 * Update launch configuration with attributes required for external process codegen.
 	 * 
@@ -182,7 +204,7 @@
 	 * @throws CoreException
 	 */
 	public ILaunchConfiguration updateLaunchConfig(ILaunchConfiguration lc) throws CoreException {
-		ILaunchConfigurationWorkingCopy lcwc = lc.getWorkingCopy();
+		MockLaunchConfig mlc = new MockLaunchConfig(lc);
 		String fileName = null;
     	try {
 			fileName = getPath2GenBuildXml().toString();
@@ -190,15 +212,15 @@
 			throw new CoreException(HibernateConsolePlugin.throwableToStatus(e, 666));
 		}
 		// setup location of Ant build.xml file 
-		lcwc.setAttribute(IExternalToolConstants.ATTR_LOCATION, fileName);
+		mlc.setTmpAttribute(IExternalToolConstants.ATTR_LOCATION, fileName);
 		// setup Ant runner main type
-		lcwc.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, 
+		mlc.setTmpAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, 
 			IAntLaunchConstants.MAIN_TYPE_NAME);
 		// setup ant remote process factory
-		lcwc.setAttribute(DebugPlugin.ATTR_PROCESS_FACTORY_ID, "org.eclipse.ant.ui.remoteAntProcessFactory"); //$NON-NLS-1$
+		mlc.setTmpAttribute(DebugPlugin.ATTR_PROCESS_FACTORY_ID, "org.eclipse.ant.ui.remoteAntProcessFactory"); //$NON-NLS-1$
 		// refresh whole workspace
-		//lcwc.setAttribute(RefreshUtil.ATTR_REFRESH_SCOPE, RefreshUtil.MEMENTO_WORKSPACE);
-		return lcwc;
+		//mlc.setTmpAttribute(RefreshUtil.ATTR_REFRESH_SCOPE, RefreshUtil.MEMENTO_WORKSPACE);
+		return mlc;
 	}
 
 	public ILaunch getLaunch(ILaunchConfiguration configuration, String mode)
Index: LaunchConfigDecorator.java
===================================================================
--- LaunchConfigDecorator.java	(revision 0)
+++ LaunchConfigDecorator.java	(revision 0)
@@ -0,0 +1,188 @@
+package org.hibernate.eclipse.launch;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.debug.core.ILaunch;
+import org.eclipse.debug.core.ILaunchConfiguration;
+import org.eclipse.debug.core.ILaunchConfigurationType;
+import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
+import org.eclipse.debug.core.ILaunchDelegate;
+
+public class LaunchConfigDecorator implements ILaunchConfiguration {
+	
+	private final ILaunchConfiguration lc;
+	
+	public LaunchConfigDecorator(ILaunchConfiguration lc) {
+		this.lc = lc;
+	}
+
+	@Override
+	public Object getAdapter(Class adapter) {
+		return lc.getAdapter(adapter);
+	}
+
+	@Override
+	public boolean contentsEqual(ILaunchConfiguration configuration) {
+		return lc.contentsEqual(configuration);
+	}
+
+	@Override
+	public ILaunchConfigurationWorkingCopy copy(String name) throws CoreException {
+		return lc.copy(name);
+	}
+
+	@Override
+	public void delete() throws CoreException {
+		lc.delete();
+	}
+
+	@Override
+	public boolean exists() {
+		return lc.exists();
+	}
+
+	@Override
+	public boolean getAttribute(String attributeName, boolean defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public int getAttribute(String attributeName, int defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public List getAttribute(String attributeName, List defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public Set getAttribute(String attributeName, Set defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public Map getAttribute(String attributeName, Map defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public String getAttribute(String attributeName, String defaultValue) throws CoreException {
+		return lc.getAttribute(attributeName, defaultValue);
+	}
+
+	@Override
+	public Map getAttributes() throws CoreException {
+		return lc.getAttributes();
+	}
+
+	@Override
+	public String getCategory() throws CoreException {
+		return lc.getCategory();
+	}
+
+	@Override
+	public IFile getFile() {
+		return lc.getFile();
+	}
+
+	@Override
+	public IPath getLocation() {
+		return lc.getLocation();
+	}
+
+	@Override
+	public IResource[] getMappedResources() throws CoreException {
+		return lc.getMappedResources();
+	}
+
+	@Override
+	public String getMemento() throws CoreException {
+		return lc.getMemento();
+	}
+
+	@Override
+	public String getName() {
+		return lc.getName();
+	}
+
+	@Override
+	public Set getModes() throws CoreException {
+		return lc.getModes();
+	}
+
+	@Override
+	public ILaunchDelegate getPreferredDelegate(Set modes) throws CoreException {
+		return lc.getPreferredDelegate(modes);
+	}
+
+	@Override
+	public ILaunchConfigurationType getType() throws CoreException {
+		return lc.getType();
+	}
+
+	@Override
+	public ILaunchConfigurationWorkingCopy getWorkingCopy() throws CoreException {
+		return lc.getWorkingCopy();
+	}
+
+	@Override
+	public boolean hasAttribute(String attributeName) throws CoreException {
+		return lc.hasAttribute(attributeName);
+	}
+
+	@Override
+	public boolean isLocal() {
+		return lc.isLocal();
+	}
+
+	@Override
+	public boolean isMigrationCandidate() throws CoreException {
+		return lc.isMigrationCandidate();
+	}
+
+	@Override
+	public boolean isWorkingCopy() {
+		return lc.isWorkingCopy();
+	}
+
+	@Override
+	public ILaunch launch(String mode, IProgressMonitor monitor) throws CoreException {
+		return lc.launch(mode, monitor);
+	}
+
+	@Override
+	public ILaunch launch(String mode, IProgressMonitor monitor, boolean build)
+			throws CoreException {
+		return lc.launch(mode, monitor, build);
+	}
+
+	@Override
+	public ILaunch launch(String mode, IProgressMonitor monitor, boolean build, boolean register)
+			throws CoreException {
+		return lc.launch(mode, monitor, build, register);
+	}
+
+	@Override
+	public void migrate() throws CoreException {
+		lc.migrate();
+	}
+
+	@Override
+	public boolean supportsMode(String mode) throws CoreException {
+		return lc.supportsMode(mode);
+	}
+
+	@Override
+	public boolean isReadOnly() {
+		return lc.isReadOnly();
+	}
+
+}