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/*******************************************************************************
* Copyright (c) 2004 Composent, Inc. 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: Composent, Inc. - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.core.identity;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.ecf.core.util.Trace;
import org.eclipse.ecf.internal.core.identity.Activator;
import org.eclipse.ecf.internal.core.identity.IdentityDebugOptions;
import org.eclipse.ecf.internal.core.identity.Messages;
import org.eclipse.osgi.util.NLS;
/**
* A factory class for creating ID instances. This is the factory for plugins to
* manufacture ID instances.
*
*/
public class IDFactory implements IIDFactory {
public static final String SECURITY_PROPERTY = IDFactory.class.getName() + ".security"; //$NON-NLS-1$
private static final int IDENTITY_CREATION_ERRORCODE = 2001;
private static Hashtable namespaces = new Hashtable();
private static boolean securityEnabled = false;
protected static IIDFactory instance = null;
static {
instance = new IDFactory();
addNamespace0(new StringID.StringIDNamespace());
addNamespace0(new GUID.GUIDNamespace());
addNamespace0(new LongID.LongNamespace());
}
protected IDFactory() {
}
public static IIDFactory getDefault() {
return instance;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#addNamespace(org.eclipse.ecf.core.identity.Namespace)
*/
public Namespace addNamespace(Namespace namespace) throws SecurityException {
if (namespace == null)
return null;
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "addNamespace", namespace); //$NON-NLS-1$
checkPermission(new NamespacePermission(namespace.toString(), NamespacePermission.ADD_NAMESPACE));
Namespace result = addNamespace0(namespace);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "addNamespace", result); //$NON-NLS-1$
return result;
}
protected final static Namespace addNamespace0(Namespace namespace) {
if (namespace == null)
return null;
return (Namespace) namespaces.put(namespace.getName(), namespace);
}
protected final static void checkPermission(NamespacePermission namespacepermission) throws SecurityException {
if (securityEnabled)
AccessController.checkPermission(namespacepermission);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#containsNamespace(org.eclipse.ecf.core.identity.Namespace)
*/
public boolean containsNamespace(Namespace namespace) throws SecurityException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "containsNamespace", namespace); //$NON-NLS-1$
if (namespace == null)
return false;
checkPermission(new NamespacePermission(namespace.toString(), NamespacePermission.CONTAINS_NAMESPACE));
boolean result = containsNamespace0(namespace);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "containsNamespace", new Boolean(result)); //$NON-NLS-1$
return result;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#getNamespaces()
*/
public List getNamespaces() {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "getNamespaces"); //$NON-NLS-1$
return new ArrayList(namespaces.values());
}
protected final static boolean containsNamespace0(Namespace n) {
if (n == null)
return false;
return namespaces.containsKey(n.getName());
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#getNamespace(org.eclipse.ecf.core.identity.Namespace)
*/
public Namespace getNamespace(Namespace namespace) throws SecurityException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "getNamespace", namespace); //$NON-NLS-1$
if (namespace == null)
return null;
checkPermission(new NamespacePermission(namespace.toString(), NamespacePermission.GET_NAMESPACE));
Namespace result = getNamespace0(namespace);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "getNamespace", result); //$NON-NLS-1$
return result;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#getNamespaceByName(java.lang.String)
*/
public Namespace getNamespaceByName(String name) throws SecurityException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "getNamespaceByName", name); //$NON-NLS-1$
Namespace result = getNamespace0(name);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "getNamespaceByName", result); //$NON-NLS-1$
return result;
}
protected final static Namespace getNamespace0(Namespace n) {
if (n == null)
return null;
return (Namespace) namespaces.get(n.getName());
}
protected final static Namespace getNamespace0(String name) {
if (name == null)
return null;
else
return (Namespace) namespaces.get(name);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createGUID()
*/
public ID createGUID() throws IDCreateException {
return createGUID(GUID.DEFAULT_BYTE_LENGTH);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createGUID(int)
*/
public ID createGUID(int length) throws IDCreateException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "createGUID", new Integer(length)); //$NON-NLS-1$
Namespace namespace = new GUID.GUIDNamespace();
ID result = createID(namespace, new Integer[] {new Integer(length)});
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "createGUID", result); //$NON-NLS-1$
return result;
}
protected static void logAndThrow(String s, Throwable t) throws IDCreateException {
IDCreateException e = null;
if (t != null) {
e = new IDCreateException(s + ": " + t.getClass().getName() + ": " //$NON-NLS-1$ //$NON-NLS-2$
+ t.getMessage(), t);
} else {
e = new IDCreateException(s);
}
Trace.throwing(Activator.PLUGIN_ID, IdentityDebugOptions.EXCEPTIONS_THROWING, IDFactory.class, "logAndThrow", e); //$NON-NLS-1$
Activator.getDefault().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, IDENTITY_CREATION_ERRORCODE, s, e));
throw e;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createID(org.eclipse.ecf.core.identity.Namespace,
* java.lang.Object[])
*/
public ID createID(Namespace n, Object[] args) throws IDCreateException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "createID", new Object[] {n, Trace.getArgumentsString(args)}); //$NON-NLS-1$
// Verify namespace is non-null
if (n == null)
logAndThrow(Messages.IDFactory_Namespace_Not_Null, null);
// Make sure that namespace is in table of known namespace. If not,
// throw...we don't create any instances that we don't know about!
Namespace ns = getNamespace0(n);
if (ns == null)
logAndThrow(NLS.bind(Messages.IDFactory_Namespace_Not_Found, n.getName()), null);
// We're OK, go ahead and setup array of classes for call to
// instantiator
// Ask instantiator to actually create instance
ID result = ns.createInstance(args);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "createID", result); //$NON-NLS-1$
return result;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createID(java.lang.String,
* java.lang.Object[])
*/
public ID createID(String namespaceName, Object[] args) throws IDCreateException {
Namespace n = getNamespaceByName(namespaceName);
if (n == null)
throw new IDCreateException(NLS.bind(Messages.IDFactory_Namespace_Not_Found, namespaceName));
return createID(n, args);
}
public ID createID(Namespace namespace, String uri) throws IDCreateException {
return createID(namespace, new Object[] {uri});
}
public ID createID(String namespace, String uri) throws IDCreateException {
return createID(namespace, new Object[] {uri});
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createStringID(java.lang.String)
*/
public ID createStringID(String idstring) throws IDCreateException {
if (idstring == null)
throw new IDCreateException(Messages.IDFactory_StringID_Not_Null);
Namespace n = new StringID.StringIDNamespace();
return createID(n, new String[] {idstring});
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#createLongID(long)
*/
public ID createLongID(long l) throws IDCreateException {
Namespace n = new LongID.LongNamespace();
return createID(n, new Long[] {new Long(l)});
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ecf.core.identity.IIDFactory#removeNamespace(org.eclipse.ecf.core.identity.Namespace)
*/
public Namespace removeNamespace(Namespace n) throws SecurityException {
Trace.entering(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_ENTERING, IDFactory.class, "removeNamespace", n); //$NON-NLS-1$
if (n == null)
return null;
checkPermission(new NamespacePermission(n.toString(), NamespacePermission.REMOVE_NAMESPACE));
Namespace result = removeNamespace0(n);
Trace.exiting(Activator.PLUGIN_ID, IdentityDebugOptions.METHODS_EXITING, IDFactory.class, "removeNamespace", result); //$NON-NLS-1$
return result;
}
protected final static Namespace removeNamespace0(Namespace n) {
if (n == null)
return null;
return (Namespace) namespaces.remove(n.getName());
}
}
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