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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.core;
import java.text.MessageFormat;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.ILaunchConfigurationDelegate;
/**
* A placeholder for a launch delegate contributed for a launch mode for an
* existing launch configuration type.
*/
public class ContributedDelegate {
/**
* The configuration element of the extension.
*/
private IConfigurationElement fElement;
/**
* Modes this delegate supports.
*/
private Set fModes;
/**
* Delegate, or <code>null</code> if not yet instantiated.
*/
private ILaunchConfigurationDelegate fDelegate;
/**
* Constructs a new contributed delegate on the
* given configuration element.
*
* @param element configuration element
*/
protected ContributedDelegate(IConfigurationElement element) {
setConfigurationElement(element);
}
/**
* Sets this delegate's configuration element.
*
* @param element this delegate's configuration element
*/
private void setConfigurationElement(IConfigurationElement element) {
fElement = element;
}
/**
* Returns this delegate's configuration element.
*
* @return this delegate's configuration element
*/
protected IConfigurationElement getConfigurationElement() {
return fElement;
}
/**
* Returns the set of modes specified in the configuration data.
*
* @return the set of modes specified in the configuration data
*/
protected Set getModes() {
if (fModes == null) {
String modes= getConfigurationElement().getAttribute("modes"); //$NON-NLS-1$
if (modes == null) {
return new HashSet(0);
}
String[] strings = modes.split(","); //$NON-NLS-1$
fModes = new HashSet(3);
for (int i = 0; i < strings.length; i++) {
String string = strings[i];
fModes.add(string.trim());
}
}
return fModes;
}
/**
* Returns the type identifier of launch configuration type this delegate is
* contributed to.
*/
protected String getLaunchConfigurationType() {
return getConfigurationElement().getAttribute("type"); //$NON-NLS-1$
}
protected ILaunchConfigurationDelegate getDelegate() throws CoreException {
if (fDelegate == null) {
Object object = getConfigurationElement().createExecutableExtension("delegate"); //$NON-NLS-1$
if (object instanceof ILaunchConfigurationDelegate) {
fDelegate = (ILaunchConfigurationDelegate)object;
} else {
throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.INTERNAL_ERROR, MessageFormat.format(DebugCoreMessages.getString("LaunchConfigurationType.Launch_delegate_for_{0}_does_not_implement_required_interface_ILaunchConfigurationDelegate._1"), new String[]{getIdentifier()}), null)); //$NON-NLS-1$
}
}
return fDelegate;
}
/**
* Returns the identifier of this extension point.
*/
protected String getIdentifier() {
return getConfigurationElement().getAttribute("id"); //$NON-NLS-1$
}
}
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