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package org.eclipse.debug.internal.core;
/*
* Licensed Materials - Property of IBM,
* WebSphere Studio Workbench
* (c) Copyright IBM Corp 2000
*/
import org.eclipse.debug.core.ILauncher;
import org.eclipse.debug.core.model.ILauncherDelegate;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;
/**
* A handle to a launcher extension that instantiates the actual
* extension lazily.
*/
public class Launcher implements ILauncher {
/**
* The configuration element that defines this launcher handle
*/
protected IConfigurationElement fConfigElement = null;
/**
* The underlying launcher, which is <code>null</code> until the
* it needs to be instantiated.
*/
protected ILauncherDelegate fDelegate = null;
/**
* Cache of the modes this launcher supports
*/
protected Set fModes;
/**
* Constructs a handle for a launcher extension.
*/
public Launcher(IConfigurationElement element) {
fConfigElement = element;
}
/**
* @see ILauncher
*/
public String getIdentifier() {
return fConfigElement.getAttribute("id");
}
/**
* Returns the set of modes specified in the configuration data.
* The set contains "mode" constants defined in <code>ILaunchManager</code>
*/
public Set getModes() {
if (fModes == null) {
String modes= fConfigElement.getAttribute("modes");
if (modes == null) {
return null;
}
StringTokenizer tokenizer= new StringTokenizer(modes, ",");
fModes = new HashSet(tokenizer.countTokens());
while (tokenizer.hasMoreTokens()) {
fModes.add(tokenizer.nextToken().trim());
}
}
return fModes;
}
/**
* Returns the label specified in the configuration data.
*/
public String getLabel() {
return fConfigElement.getAttribute("label");
}
/**
* @see ILauncher
*/
public String getPerspectiveIdentifier() {
return fConfigElement.getAttribute("perspective");
}
/**
* Returns the launcher for this handle, instantiating it if required.
*/
public ILauncherDelegate getDelegate() {
if (fDelegate == null) {
try {
fDelegate = (ILauncherDelegate)fConfigElement.createExecutableExtension("class");
} catch (CoreException e) {
//status logged in the #createExecutableExtension code
}
}
return fDelegate;
}
/**
* @see ILauncher
*/
public boolean launch(Object[] elements, String mode) {
return getDelegate().launch(elements, mode, this);
}
/**
* Returns the configuration element for this extension
*/
public IConfigurationElement getConfigurationElement() {
return fConfigElement;
}
}
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