Bug 121709 [Commands] parameters: Add types
I'm going to attach a patch that adds support for typed command parameters. This addresses several issues: - parameter values are strings, but handlers may want to work on objects - multiple handlers of a command should have a consistent way of converting string parameter values to objects - tooling to construct parameterized commands that starts with object parameter values needs a way of producing string parameter values that will work when the command is executed - there should be a way to classify commands by their object parameter types so, given an object, a set of commands that may work with it can be suggested To address these issues, the patch allows parameter types to be declared in the extension-point XML. The example below defines a command for negating integers and a parameter type that works with it. <extension point="org.eclipse.ui.commands"> <command id="org.example.commands.negateInteger" defaultHandler="org.example.commands.NegateIntegerHandler" name="Negate an Integer"> <commandParameter id="param" name="the param" optional="false" typeId="org.example.commands.Integer"/> </command> <commandParameterType id="org.example.commands.Integer" converter="org.example.commands.IntegerConverter" type="java.lang.Integer"/> </extension> In addition to extending the schema for org.eclipse.ui.commands, code has been added to a number of plugins (primarily org.eclipse.core.commands) to support the notion of typed parameters.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/CommandManager.java
}
			fireCommandManagerChanged(new CommandManagerEvent(this, null,
					false, false, categoryId, categoryIdAdded, true));
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.commands.ICommandListener#commandChanged(org.eclipse.commands.CommandEvent)
	 */
	public final void commandChanged(final CommandEvent commandEvent) {
		if (commandEvent.isDefinedChanged()) {
			final Command command = commandEvent.getCommand();
			final String commandId = command.getId();
			final boolean commandIdAdded = command.isDefined();
			if (commandIdAdded) {
				definedHandleObjects.add(command);
			} else {
				definedHandleObjects.remove(command);
			}
			fireCommandManagerChanged(new CommandManagerEvent(this, commandId,
					commandIdAdded, true, null, false, false));
		}
	}
	/**
	 * Sets the name and description of the category for uncategorized commands.
	 * This is the category that will be returned if
	 * {@link #getCategory(String)} is called with <code>null</code>.
	 * 
	 * @param name