Mercurial > projects > dwt-addons
view dwtx/core/commands/common/HandleObjectManager.d @ 3:6518c18a01f7
eclipse.core package without osgi dependencies
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Wed, 26 Mar 2008 00:57:19 +0100 |
parents | |
children | 04b47443bb01 |
line wrap: on
line source
/******************************************************************************* * Copyright (c) 2005, 2006 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.core.commands.common.HandleObjectManager; import dwtx.core.commands.common.HandleObject; import dwtx.core.commands.common.EventManager; import dwt.dwthelper.utils; import tango.util.collection.HashSet; import tango.util.collection.HashMap; import tango.util.collection.model.Set; import tango.util.collection.model.Map; // import java.util.HashMap; // import java.util.HashSet; // import java.util.Iterator; // import java.util.Map; // import java.util.Set; /** * <p> * A manager of {@link HandleObject} instances. This has some common behaviour * which is shared between all such managers. * </p> * <p> * Clients may extend. * </p> * * @since 3.2 */ public abstract class HandleObjectManager : EventManager { /** * The set of handle objects that are defined. This value may be empty, but * it is never <code>null</code>. */ protected const Set!(Object) definedHandleObjects; /** * The map of identifiers (<code>String</code>) to handle objects ( * <code>HandleObject</code>). This collection may be empty, but it is * never <code>null</code>. */ protected const Map!( String, Object ) handleObjectsById; public this(){ definedHandleObjects = new HashSet!(Object)(); handleObjectsById = new HashMap!( String, Object )(); } /** * Verifies that the identifier is valid. Exceptions will be thrown if the * identifier is invalid in some way. * * @param id * The identifier to validate; may be anything. */ protected final void checkId(String id) { if (id is null) { throw new NullPointerException( "A handle object may not have a null identifier"); //$NON-NLS-1$ } if (id.length < 1) { throw new IllegalArgumentException( "The handle object must not have a zero-length identifier"); //$NON-NLS-1$ } } /** * Returns the set of identifiers for those handle objects that are defined. * * @return The set of defined handle object identifiers; this value may be * empty, but it is never <code>null</code>. */ protected final HashSet!(String) getDefinedHandleObjectIds() { HashSet!(String) definedHandleObjectIds = new HashSet!(String)(/+definedHandleObjects .size()+/); foreach ( v; definedHandleObjects.elements() ) { auto handleObject = cast(HandleObject)v; String id = handleObject.getId(); definedHandleObjectIds.add(id); } return definedHandleObjectIds; } }