bundles/org.eclipse.e4.javascript/src/org/eclipse/e4/internal/javascript/JSBundleImpl.java - e4/org.eclipse.e4.languages - Git at Google

 /*******************************************************************************
  * Copyright (c) 2009 IBM Corporation and others
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.e4.internal.javascript;

 import java.io.*;
 import java.net.URL;
 import java.util.*;
 import org.eclipse.e4.javascript.Constants;
 import org.eclipse.e4.javascript.JSBundle;
 import org.mozilla.javascript.*;
 import org.osgi.framework.Version;

 public class JSBundleImpl implements JSBundle {
 	private static final String ACTIVATOR_STOP_METHOD = "stop"; //$NON-NLS-1$
 	private static final String ACTIVATOR_START_METHOD = "start"; //$NON-NLS-1$
 	private String symbolicName;
 	private Version version;
 	private List imports;
 	private List requires;
 	private List exports;
 	private boolean singleton = false;
 	private boolean markedStarted = false;

 	private int state;
 	Scriptable scope;
 	private JSFrameworkImpl framework;
 	private JSBundleData bundleData;
 	JSBundleContext bundleContext;
 	Scriptable activator;

 	public JSBundleImpl(JSFrameworkImpl framework, JSBundleData bundleData) {
 		this.framework = framework;
 		this.bundleData = bundleData;
 		state = INSTALLED;

 		Map headers = bundleData.getHeaders();
 		parseSymbolicName((String) headers.get(Constants.BUNDLE_SYMBOLIC_NAME_HEADER));
 		parseVersion((String) headers.get(Constants.BUNDLE_VERSION_HEADER));
 		parseImports((String) headers.get(Constants.IMPORTS_HEADER));
 		parseExports((String) headers.get(Constants.EXPORTS_HEADER));
 		parseRequires((String) headers.get(Constants.REQUIRES_HEADER));
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getSymbolicName()
 	 */
 	public String getSymbolicName() {
 		return symbolicName;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getVersion()
 	 */
 	public Version getVersion() {
 		return version;
 	}

 	public List getImports() {
 		return imports;
 	}

 	public List getRequires() {
 		return requires;
 	}

 	public List getExports() {
 		return exports;
 	}

 	public int hashCode() {
 		final int prime = 31;
 		int result = 1;
 		result = prime * result + ((symbolicName == null) ? 0 : symbolicName.hashCode());
 		result = prime * result + ((version == null) ? 0 : version.hashCode());
 		return result;
 	}

 	public boolean equals(Object obj) {
 		if (this == obj)
 			return true;
 		if (obj == null)
 			return false;
 		if (getClass() != obj.getClass())
 			return false;
 		JSBundleImpl other = (JSBundleImpl) obj;
 		if (symbolicName == null) {
 			if (other.symbolicName != null)
 				return false;
 		} else if (!symbolicName.equals(other.symbolicName))
 			return false;
 		if (version == null) {
 			if (other.version != null)
 				return false;
 		} else if (!version.equals(other.version))
 			return false;
 		return true;
 	}

 	private void parseSymbolicName(String symbolicNameHeader) {
 		StringTokenizer tokenizer = new StringTokenizer(symbolicNameHeader, Constants.PARAMETER_DELIMITER);
 		symbolicName = tokenizer.nextToken().trim();
 		while (tokenizer.hasMoreTokens()) {
 			String token = tokenizer.nextToken();
 			if (token.indexOf(Constants.ATTRIBUTE_EQUALS) != -1) {
 				int index = token.indexOf(Constants.ATTRIBUTE_EQUALS);
 				String attributeName = token.substring(0, index).trim();
 				if (attributeName.length() == 0)
 					throw new IllegalArgumentException("bad syntax: " + token + " in " + symbolicNameHeader); //$NON-NLS-1$//$NON-NLS-2$

 				if (!attributeName.equals(Constants.SINGLETON_ATTRIBUTE))
 					continue;
 				String value = token.substring(index + Constants.ATTRIBUTE_EQUALS.length()).trim();
 				if (value.equalsIgnoreCase(Boolean.TRUE.toString()))
 					singleton = true;
 			} else
 				throw new IllegalArgumentException("bad syntax: " + token + " in " + symbolicNameHeader); //$NON-NLS-1$//$NON-NLS-2$
 		}
 	}

 	private void parseVersion(String header) {
 		version = Version.parseVersion(header);
 	}

 	private void parseRequires(String header) {
 		if (header == null) {
 			requires = Collections.EMPTY_LIST;
 			return;
 		}

 		requires = new ArrayList();
 		StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
 		while (tokenizer.hasMoreTokens()) {
 			String token = tokenizer.nextToken();
 			JSRequire jsRequire = new JSRequire(token);
 			if (jsRequire != null)
 				requires.add(jsRequire);
 		}
 	}

 	private void parseExports(String header) {
 		if (header == null) {
 			exports = Collections.EMPTY_LIST;
 			return;
 		}
 		exports = new ArrayList();
 		StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
 		while (tokenizer.hasMoreTokens()) {
 			String token = tokenizer.nextToken();
 			JSExport jsExport = new JSExport(token, this);
 			if (jsExport != null)
 				exports.add(jsExport);
 		}
 	}

 	private void parseImports(String header) {
 		if (header == null) {
 			imports = Collections.EMPTY_LIST;
 			return;
 		}

 		imports = new ArrayList();
 		StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
 		while (tokenizer.hasMoreTokens()) {
 			String token = tokenizer.nextToken();
 			JSImport jsImport = new JSImport(token);
 			if (jsImport != null)
 				imports.add(jsImport);
 		}
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getBundleId()
 	 */
 	public int getBundleId() {
 		return bundleData.getBundleId();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getLocation()
 	 */
 	public String getLocation() {
 		return bundleData.getLocation();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getHeaders()
 	 */
 	public Map getHeaders() {
 		return bundleData.getHeaders();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getState()
 	 */
 	public int getState() {
 		return state;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#uninstall()
 	 */
 	public void uninstall() {
 		stop();
 		state = UNINSTALLED;
 	}

 	protected void resolve() {
 		if (state != INSTALLED)
 			return;

 		Map namedExports = new HashMap();

 		// process imports (first)
 		for (Iterator iterator = imports.iterator(); iterator.hasNext();) {
 			JSImport jsImport = (JSImport) iterator.next();
 			JSExport jsExport = jsImport.getWiredExport();
 			if (!namedExports.containsKey(jsExport.getName()))
 				namedExports.put(jsExport.getName(), jsExport);
 		}

 		// process requires
 		for (Iterator iterator = requires.iterator(); iterator.hasNext();) {
 			JSRequire jsRequire = (JSRequire) iterator.next();
 			JSBundleImpl wiredBundle = jsRequire.getWiredBundle();
 			List wiredBundleExports = wiredBundle.getExports();
 			for (Iterator exportIterator = wiredBundleExports.iterator(); exportIterator.hasNext();) {
 				JSExport jsExport = (JSExport) exportIterator.next();
 				if (!namedExports.containsKey(jsExport.getName()))
 					namedExports.put(jsExport.getName(), jsExport);
 			}
 		}

 		ArrayList names = new ArrayList(namedExports.keySet());
 		// this sorts the set of names we'll be importing alphabetically and
 		// perhaps more importantly will allow us to create the shorter/parent dotted entries first
 		Collections.sort(names);

 		Scriptable newScope = framework.createScope(bundleData.getContextClassLoader());
 		for (Iterator iterator = names.iterator(); iterator.hasNext();) {
 			String exportName = (String) iterator.next();
 			JSExport jsExport = (JSExport) namedExports.get(exportName);
 			jsExport.addToScope(newScope);
 		}

 		evalScript(newScope);
 		scope = newScope;
 		state = RESOLVED;
 	}

 	private void evalScript(Scriptable scriptScope) {
 		Context context = Context.getCurrentContext();

 		String scriptPath = (String) bundleData.getHeaders().get(Constants.SCRIPT_PATH_HEADER);
 		if (scriptPath == null)
 			scriptPath = Constants.SCRIPT_PATH_DOT;

 		StringTokenizer tokenizer = new StringTokenizer(scriptPath, Constants.SCRIPT_PATH_DELIMITER);
 		while (tokenizer.hasMoreTokens()) {
 			String token = tokenizer.nextToken().trim();
 			if (token.equals(Constants.SCRIPT_PATH_DOT)) {
 				String script = (String) bundleData.getHeaders().get(Constants.SCRIPT_HEADER);
 				if (script != null)
 					context.evaluateString(scriptScope, script, "script.js", 0, null); //$NON-NLS-1$
 				continue;
 			}

 			Reader reader = null;
 			try {
 				URL scriptURL = bundleData.getEntry(token);
 				reader = new InputStreamReader(scriptURL.openStream());
 				context.evaluateReader(scriptScope, reader, token, 0, null);
 			} catch (IOException e) {
 				throw new IllegalStateException("Error reading script for " + this.toString() + ": " + e.getMessage()); //$NON-NLS-1$ //$NON-NLS-2$
 			} finally {
 				try {
 					if (reader != null)
 						reader.close();
 				} catch (IOException e) {
 					// ignore
 				}
 			}
 		}
 	}

 	protected void unresolve() {
 		if (state == ACTIVE) {
 			stop();
 			markedStarted = true;
 		}
 		scope = null;

 		if (state == RESOLVED)
 			state = INSTALLED;
 	}

 	public String toString() {
 		return "JavaScriptBundle{symbolic-name=" + symbolicName + ", version=" + version.toString() + "}"; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#getScope()
 	 */
 	public Scriptable getScope() {
 		return scope;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#start()
 	 */
 	public void start() {
 		markedStarted = true;
 		if (state != RESOLVED)
 			return;

 		state = STARTING;
 		bundleContext = framework.getBundleContext(this);
 		activator = createActivatorInstance();
 		if (activator != null) {
 			final Callable startMethod = (Callable) activator.get(ACTIVATOR_START_METHOD, activator);
 			ContextFactory.getGlobal().call(new ContextAction() {
 				public Object run(Context cx) {
 					startMethod.call(cx, activator, activator, new Object[] {bundleContext});
 					return null;
 				}
 			});

 		}
 		state = ACTIVE;
 	}

 	private Scriptable createActivatorInstance() {
 		final String activatorName = (String) getHeaders().get(Constants.ACTIVATOR_HEADER);
 		if (activatorName == null)
 			return null;

 		Object value = lookup(activatorName);
 		if (!(value instanceof Function))
 			throw new IllegalStateException(activatorName + " is not a function."); //$NON-NLS-1$

 		final Function constructorFunction = (Function) value;
 		return (Scriptable) ContextFactory.getGlobal().call(new ContextAction() {
 			public Object run(Context cx) {
 				return constructorFunction.construct(cx, scope, null);
 			}
 		});
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.e4.internal.javascript.JSBundle#stop()
 	 */
 	public void stop() {
 		markedStarted = false;
 		if (state != ACTIVE)
 			return;

 		state = STOPPING;
 		if (activator != null) {
 			final Callable stopMethod = (Callable) activator.get(ACTIVATOR_STOP_METHOD, activator);
 			ContextFactory.getGlobal().call(new ContextAction() {
 				public Object run(Context cx) {
 					stopMethod.call(Context.getCurrentContext(), activator, activator, new Object[] {bundleContext});
 					return null;
 				}
 			});
 		}
 		state = RESOLVED;
 	}

 	public boolean isSingleton() {
 		return singleton;
 	}

 	public boolean isMarkedStarted() {
 		return markedStarted;
 	}

 	public Object call(final ContextAction action) {
 		final ClassLoader bundleClassLoader = bundleData.getContextClassLoader();
 		if (bundleClassLoader == null)
 			return ContextFactory.getGlobal().call(action);

 		return ContextFactory.getGlobal().call(new ContextAction() {
 			public Object run(Context context) {
 				ClassLoader current = context.getApplicationClassLoader();
 				context.setApplicationClassLoader(bundleClassLoader);
 				try {
 					return action.run(context);
 				} finally {
 					context.setApplicationClassLoader(current);
 				}
 			}
 		});
 	}

 	public Object lookup(String name) {
 		Scriptable currentScope = scope;
 		StringTokenizer tokenizer = new StringTokenizer(name, "."); //$NON-NLS-1$
 		while (true) {
 			String token = tokenizer.nextToken();
 			Object value = currentScope.get(token, currentScope);
 			if (!tokenizer.hasMoreTokens())
 				return value;

 			if (value instanceof Scriptable)
 				currentScope = (Scriptable) value;
 			else
 				throw new RuntimeException("Not Found: " + name + " in " + this.toString()); //$NON-NLS-1$//$NON-NLS-2$
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2009 IBM Corporation and others
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.e4.internal.javascript;

	import java.io.*;
	import java.net.URL;
	import java.util.*;
	import org.eclipse.e4.javascript.Constants;
	import org.eclipse.e4.javascript.JSBundle;
	import org.mozilla.javascript.*;
	import org.osgi.framework.Version;

	public class JSBundleImpl implements JSBundle {
	private static final String ACTIVATOR_STOP_METHOD = "stop"; //$NON-NLS-1$
	private static final String ACTIVATOR_START_METHOD = "start"; //$NON-NLS-1$
	private String symbolicName;
	private Version version;
	private List imports;
	private List requires;
	private List exports;
	private boolean singleton = false;
	private boolean markedStarted = false;

	private int state;
	Scriptable scope;
	private JSFrameworkImpl framework;
	private JSBundleData bundleData;
	JSBundleContext bundleContext;
	Scriptable activator;

	public JSBundleImpl(JSFrameworkImpl framework, JSBundleData bundleData) {
	this.framework = framework;
	this.bundleData = bundleData;
	state = INSTALLED;

	Map headers = bundleData.getHeaders();
	parseSymbolicName((String) headers.get(Constants.BUNDLE_SYMBOLIC_NAME_HEADER));
	parseVersion((String) headers.get(Constants.BUNDLE_VERSION_HEADER));
	parseImports((String) headers.get(Constants.IMPORTS_HEADER));
	parseExports((String) headers.get(Constants.EXPORTS_HEADER));
	parseRequires((String) headers.get(Constants.REQUIRES_HEADER));
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getSymbolicName()
	*/
	public String getSymbolicName() {
	return symbolicName;
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getVersion()
	*/
	public Version getVersion() {
	return version;
	}

	public List getImports() {
	return imports;
	}

	public List getRequires() {
	return requires;
	}

	public List getExports() {
	return exports;
	}

	public int hashCode() {
	final int prime = 31;
	int result = 1;
	result = prime * result + ((symbolicName == null) ? 0 : symbolicName.hashCode());
	result = prime * result + ((version == null) ? 0 : version.hashCode());
	return result;
	}

	public boolean equals(Object obj) {
	if (this == obj)
	return true;
	if (obj == null)
	return false;
	if (getClass() != obj.getClass())
	return false;
	JSBundleImpl other = (JSBundleImpl) obj;
	if (symbolicName == null) {
	if (other.symbolicName != null)
	return false;
	} else if (!symbolicName.equals(other.symbolicName))
	return false;
	if (version == null) {
	if (other.version != null)
	return false;
	} else if (!version.equals(other.version))
	return false;
	return true;
	}

	private void parseSymbolicName(String symbolicNameHeader) {
	StringTokenizer tokenizer = new StringTokenizer(symbolicNameHeader, Constants.PARAMETER_DELIMITER);
	symbolicName = tokenizer.nextToken().trim();
	while (tokenizer.hasMoreTokens()) {
	String token = tokenizer.nextToken();
	if (token.indexOf(Constants.ATTRIBUTE_EQUALS) != -1) {
	int index = token.indexOf(Constants.ATTRIBUTE_EQUALS);
	String attributeName = token.substring(0, index).trim();
	if (attributeName.length() == 0)
	throw new IllegalArgumentException("bad syntax: " + token + " in " + symbolicNameHeader); //$NON-NLS-1$//$NON-NLS-2$

	if (!attributeName.equals(Constants.SINGLETON_ATTRIBUTE))
	continue;
	String value = token.substring(index + Constants.ATTRIBUTE_EQUALS.length()).trim();
	if (value.equalsIgnoreCase(Boolean.TRUE.toString()))
	singleton = true;
	} else
	throw new IllegalArgumentException("bad syntax: " + token + " in " + symbolicNameHeader); //$NON-NLS-1$//$NON-NLS-2$
	}
	}

	private void parseVersion(String header) {
	version = Version.parseVersion(header);
	}

	private void parseRequires(String header) {
	if (header == null) {
	requires = Collections.EMPTY_LIST;
	return;
	}

	requires = new ArrayList();
	StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
	while (tokenizer.hasMoreTokens()) {
	String token = tokenizer.nextToken();
	JSRequire jsRequire = new JSRequire(token);
	if (jsRequire != null)
	requires.add(jsRequire);
	}
	}

	private void parseExports(String header) {
	if (header == null) {
	exports = Collections.EMPTY_LIST;
	return;
	}
	exports = new ArrayList();
	StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
	while (tokenizer.hasMoreTokens()) {
	String token = tokenizer.nextToken();
	JSExport jsExport = new JSExport(token, this);
	if (jsExport != null)
	exports.add(jsExport);
	}
	}

	private void parseImports(String header) {
	if (header == null) {
	imports = Collections.EMPTY_LIST;
	return;
	}

	imports = new ArrayList();
	StringTokenizer tokenizer = new StringTokenizer(header, Constants.CLAUSE_DELIMITER);
	while (tokenizer.hasMoreTokens()) {
	String token = tokenizer.nextToken();
	JSImport jsImport = new JSImport(token);
	if (jsImport != null)
	imports.add(jsImport);
	}
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getBundleId()
	*/
	public int getBundleId() {
	return bundleData.getBundleId();
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getLocation()
	*/
	public String getLocation() {
	return bundleData.getLocation();
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getHeaders()
	*/
	public Map getHeaders() {
	return bundleData.getHeaders();
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getState()
	*/
	public int getState() {
	return state;
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#uninstall()
	*/
	public void uninstall() {
	stop();
	state = UNINSTALLED;
	}

	protected void resolve() {
	if (state != INSTALLED)
	return;

	Map namedExports = new HashMap();

	// process imports (first)
	for (Iterator iterator = imports.iterator(); iterator.hasNext();) {
	JSImport jsImport = (JSImport) iterator.next();
	JSExport jsExport = jsImport.getWiredExport();
	if (!namedExports.containsKey(jsExport.getName()))
	namedExports.put(jsExport.getName(), jsExport);
	}

	// process requires
	for (Iterator iterator = requires.iterator(); iterator.hasNext();) {
	JSRequire jsRequire = (JSRequire) iterator.next();
	JSBundleImpl wiredBundle = jsRequire.getWiredBundle();
	List wiredBundleExports = wiredBundle.getExports();
	for (Iterator exportIterator = wiredBundleExports.iterator(); exportIterator.hasNext();) {
	JSExport jsExport = (JSExport) exportIterator.next();
	if (!namedExports.containsKey(jsExport.getName()))
	namedExports.put(jsExport.getName(), jsExport);
	}
	}

	ArrayList names = new ArrayList(namedExports.keySet());
	// this sorts the set of names we'll be importing alphabetically and
	// perhaps more importantly will allow us to create the shorter/parent dotted entries first
	Collections.sort(names);

	Scriptable newScope = framework.createScope(bundleData.getContextClassLoader());
	for (Iterator iterator = names.iterator(); iterator.hasNext();) {
	String exportName = (String) iterator.next();
	JSExport jsExport = (JSExport) namedExports.get(exportName);
	jsExport.addToScope(newScope);
	}

	evalScript(newScope);
	scope = newScope;
	state = RESOLVED;
	}

	private void evalScript(Scriptable scriptScope) {
	Context context = Context.getCurrentContext();

	String scriptPath = (String) bundleData.getHeaders().get(Constants.SCRIPT_PATH_HEADER);
	if (scriptPath == null)
	scriptPath = Constants.SCRIPT_PATH_DOT;

	StringTokenizer tokenizer = new StringTokenizer(scriptPath, Constants.SCRIPT_PATH_DELIMITER);
	while (tokenizer.hasMoreTokens()) {
	String token = tokenizer.nextToken().trim();
	if (token.equals(Constants.SCRIPT_PATH_DOT)) {
	String script = (String) bundleData.getHeaders().get(Constants.SCRIPT_HEADER);
	if (script != null)
	context.evaluateString(scriptScope, script, "script.js", 0, null); //$NON-NLS-1$
	continue;
	}

	Reader reader = null;
	try {
	URL scriptURL = bundleData.getEntry(token);
	reader = new InputStreamReader(scriptURL.openStream());
	context.evaluateReader(scriptScope, reader, token, 0, null);
	} catch (IOException e) {
	throw new IllegalStateException("Error reading script for " + this.toString() + ": " + e.getMessage()); //$NON-NLS-1$ //$NON-NLS-2$
	} finally {
	try {
	if (reader != null)
	reader.close();
	} catch (IOException e) {
	// ignore
	}
	}
	}
	}

	protected void unresolve() {
	if (state == ACTIVE) {
	stop();
	markedStarted = true;
	}
	scope = null;

	if (state == RESOLVED)
	state = INSTALLED;
	}

	public String toString() {
	return "JavaScriptBundle{symbolic-name=" + symbolicName + ", version=" + version.toString() + "}"; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#getScope()
	*/
	public Scriptable getScope() {
	return scope;
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#start()
	*/
	public void start() {
	markedStarted = true;
	if (state != RESOLVED)
	return;

	state = STARTING;
	bundleContext = framework.getBundleContext(this);
	activator = createActivatorInstance();
	if (activator != null) {
	final Callable startMethod = (Callable) activator.get(ACTIVATOR_START_METHOD, activator);
	ContextFactory.getGlobal().call(new ContextAction() {
	public Object run(Context cx) {
	startMethod.call(cx, activator, activator, new Object[] {bundleContext});
	return null;
	}
	});

	}
	state = ACTIVE;
	}

	private Scriptable createActivatorInstance() {
	final String activatorName = (String) getHeaders().get(Constants.ACTIVATOR_HEADER);
	if (activatorName == null)
	return null;

	Object value = lookup(activatorName);
	if (!(value instanceof Function))
	throw new IllegalStateException(activatorName + " is not a function."); //$NON-NLS-1$

	final Function constructorFunction = (Function) value;
	return (Scriptable) ContextFactory.getGlobal().call(new ContextAction() {
	public Object run(Context cx) {
	return constructorFunction.construct(cx, scope, null);
	}
	});
	}

	/* (non-Javadoc)
	* @see org.eclipse.e4.internal.javascript.JSBundle#stop()
	*/
	public void stop() {
	markedStarted = false;
	if (state != ACTIVE)
	return;

	state = STOPPING;
	if (activator != null) {
	final Callable stopMethod = (Callable) activator.get(ACTIVATOR_STOP_METHOD, activator);
	ContextFactory.getGlobal().call(new ContextAction() {
	public Object run(Context cx) {
	stopMethod.call(Context.getCurrentContext(), activator, activator, new Object[] {bundleContext});
	return null;
	}
	});
	}
	state = RESOLVED;
	}

	public boolean isSingleton() {
	return singleton;
	}

	public boolean isMarkedStarted() {
	return markedStarted;
	}

	public Object call(final ContextAction action) {
	final ClassLoader bundleClassLoader = bundleData.getContextClassLoader();
	if (bundleClassLoader == null)
	return ContextFactory.getGlobal().call(action);

	return ContextFactory.getGlobal().call(new ContextAction() {
	public Object run(Context context) {
	ClassLoader current = context.getApplicationClassLoader();
	context.setApplicationClassLoader(bundleClassLoader);
	try {
	return action.run(context);
	} finally {
	context.setApplicationClassLoader(current);
	}
	}
	});
	}

	public Object lookup(String name) {
	Scriptable currentScope = scope;
	StringTokenizer tokenizer = new StringTokenizer(name, "."); //$NON-NLS-1$
	while (true) {
	String token = tokenizer.nextToken();
	Object value = currentScope.get(token, currentScope);
	if (!tokenizer.hasMoreTokens())
	return value;

	if (value instanceof Scriptable)
	currentScope = (Scriptable) value;
	else
	throw new RuntimeException("Not Found: " + name + " in " + this.toString()); //$NON-NLS-1$//$NON-NLS-2$
	}
	}
	}