/*******************************************************************************
 * Copyright (c) 2003, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM - Initial API and implementation
 *     ARM Ltd. - basic tooltip support
 *     James Blackburn (Broadcom Corp.)
 *     Petri Tuononen - [321040] Get Library Search Paths
 *     Baltasar Belyavsky (Texas Instruments) - [279633] Custom command-generator support
 *     cartu38 opendev (STMicroelectronics) - [514385] Custom defaultValue-generator support
 *******************************************************************************/
package org.eclipse.cdt.managedbuilder.core;

import org.eclipse.cdt.managedbuilder.macros.IOptionContextData;

/**
 * Basic Tool / Tool-chain Option type.
 *
 * @noextend This class is not intended to be subclassed by clients.
 * @noimplement This interface is not intended to be implemented by clients.
 */
public interface IOption extends IBuildObject {
	// Type for the value of the option
	public static final int BOOLEAN = 0;
	public static final int ENUMERATED = 1;
	public static final int STRING = 2;
	public static final int STRING_LIST = 3;
	public static final int INCLUDE_PATH = 4;
	public static final int PREPROCESSOR_SYMBOLS = 5;
	/**
	 * String list of library names to link against searched for
	 * via LIBRARY_PATHS by the linker. In the GNU
	 * tool-chain these correspond to -l{lib_name}. <br/>
	 * This option type is persisted / referenced by the name
	 * {@link IOption#TYPE_LIB}
	 */
	public static final int LIBRARIES = 6;
	public static final int OBJECTS = 7;
	public static final int INCLUDE_FILES = 8;
	/**
	 * String list of library search paths <br/>
	 * This option type is persisted / referenced by the name
	 * {@link IOption#TYPE_LIB_PATHS}
	 */
	public static final int LIBRARY_PATHS = 9;
	/**
	 * String list of absolute path to libraries.
	 * Not currently used by the GNU integration <br/>
	 * This option type is persisted / referenced by the name 'libFiles'
	 * {@link IOption#TYPE_LIB_FILES}
	 */
	public static final int LIBRARY_FILES = 10;
	public static final int MACRO_FILES = 11;

	/**
	 * Tree of items to select one from.
	 * @since 8.1
	 */
	public static final int TREE = 12;

	public static final int UNDEF_INCLUDE_PATH = -INCLUDE_PATH;
	public static final int UNDEF_PREPROCESSOR_SYMBOLS = -PREPROCESSOR_SYMBOLS;
	public static final int UNDEF_INCLUDE_FILES = -INCLUDE_FILES;
	public static final int UNDEF_LIBRARY_PATHS = -LIBRARY_PATHS;
	public static final int UNDEF_LIBRARY_FILES = -LIBRARY_FILES;
	public static final int UNDEF_MACRO_FILES = -MACRO_FILES;

	// Browse type
	public static final int BROWSE_NONE = 0;
	public static final String NONE = "none"; //$NON-NLS-1$
	public static final int BROWSE_FILE = 1;
	public static final String FILE = "file"; //$NON-NLS-1$
	public static final int BROWSE_DIR = 2;
	public static final String DIR = "directory"; //$NON-NLS-1$

	// Resource Filter type
	public static final int FILTER_ALL = 0;
	public static final String ALL = "all"; //$NON-NLS-1$
	public static final int FILTER_FILE = 1;
	public static final int FILTER_PROJECT = 2;
	public static final String PROJECT = "project"; //$NON-NLS-1$

	// Schema attribute names for option elements
	public static final String BROWSE_TYPE = "browseType"; //$NON-NLS-1$
	/** @since 7.0 */
	public static final String BROWSE_FILTER_PATH = "browseFilterPath"; //$NON-NLS-1$
	/** @since 7.0 */
	public static final String BROWSE_FILTER_EXTENSIONS = "browseFilterExtensions"; //$NON-NLS-1$
	public static final String CATEGORY = "category"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String ICON = "icon"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String ORDER = "order"; //$NON-NLS-1$
	public static final String COMMAND = "command"; //$NON-NLS-1$
	public static final String COMMAND_FALSE = "commandFalse"; //$NON-NLS-1$
	/** @since 8.3 */
	public static final String USE_BY_SCANNER_DISCOVERY = "useByScannerDiscovery"; //$NON-NLS-1$
	/** @since 8.0 */
	public static final String COMMAND_GENERATOR = "commandGenerator"; //$NON-NLS-1$
	public static final String TOOL_TIP = "tip"; //$NON-NLS-1$
	public static final String CONTEXT_ID = "contextId"; //$NON-NLS-1$
	public static final String DEFAULT_VALUE = "defaultValue"; //$NON-NLS-1$
	/**
	 * @since 8.5
	 */
	public static final String DEFAULTVALUE_GENERATOR = "defaultValueGenerator"; //$NON-NLS-1$
	public static final String ENUM_VALUE = "enumeratedOptionValue"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String TREE_ROOT = "treeOptionRoot"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String SELECT_LEAF_ONLY = "selectLeafOnly"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String TREE_VALUE = "treeOption"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String DESCRIPTION = "description"; //$NON-NLS-1$
	public static final String IS_DEFAULT = "isDefault"; //$NON-NLS-1$
	public static final String LIST_VALUE = "listOptionValue"; //$NON-NLS-1$
	public static final String RESOURCE_FILTER = "resourceFilter"; //$NON-NLS-1$
	public static final String APPLICABILITY_CALCULATOR = "applicabilityCalculator"; //$NON-NLS-1$
	public static final String TYPE_BOOL = "boolean"; //$NON-NLS-1$
	public static final String TYPE_ENUM = "enumerated"; //$NON-NLS-1$
	public static final String TYPE_INC_PATH = "includePath"; //$NON-NLS-1$
	public static final String TYPE_LIB = "libs"; //$NON-NLS-1$
	public static final String TYPE_STRING = "string"; //$NON-NLS-1$
	public static final String TYPE_STR_LIST = "stringList"; //$NON-NLS-1$
	public static final String TYPE_USER_OBJS = "userObjs"; //$NON-NLS-1$
	public static final String TYPE_DEFINED_SYMBOLS = "definedSymbols"; //$NON-NLS-1$
	public static final String TYPE_LIB_PATHS = "libPaths"; //$NON-NLS-1$
	public static final String TYPE_LIB_FILES = "libFiles"; //$NON-NLS-1$
	public static final String TYPE_INC_FILES = "includeFiles"; //$NON-NLS-1$
	public static final String TYPE_SYMBOL_FILES = "symbolFiles"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_INC_PATH = "undefIncludePath"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_DEFINED_SYMBOLS = "undefDefinedSymbols"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_LIB_PATHS = "undefLibPaths"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_LIB_FILES = "undefLibFiles"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_INC_FILES = "undefIncludeFiles"; //$NON-NLS-1$
	public static final String TYPE_UNDEF_SYMBOL_FILES = "undefSymbolFiles"; //$NON-NLS-1$
	/**
	 * @since 8.1
	 */
	public static final String TYPE_TREE = "tree"; //$NON-NLS-1$

	public static final String VALUE = "value"; //$NON-NLS-1$
	public static final String VALUE_TYPE = "valueType"; //$NON-NLS-1$
	public static final String VALUE_HANDLER = "valueHandler"; //$NON-NLS-1$
	public static final String VALUE_HANDLER_EXTRA_ARGUMENT = "valueHandlerExtraArgument"; //$NON-NLS-1$

	/** @since 8.0 */
	public static final String FIELD_EDITOR_ID = "fieldEditor"; //$NON-NLS-1$
	/** @since 8.0 */
	public static final String FIELD_EDITOR_EXTRA_ARGUMENT = "fieldEditorExtraArgument"; //$NON-NLS-1$

	// Schema attribute names for listOptionValue elements
	public static final String LIST_ITEM_VALUE = "value"; //$NON-NLS-1$
	public static final String LIST_ITEM_BUILTIN = "builtIn"; //$NON-NLS-1$

	/**
	 * @return the parent of this option. This is an object implementing ITool
	 * or IToolChain.
	 *
	 * @since 3.0 - changed return type from ITool to IBuildObject. The method returns
	 * the same object as getOptionHolder().  It is included as a convenience for clients.
	 */
	public IBuildObject getParent();

	/**
	 * @return the holder (parent) of this option. This may be an object
	 * implementing ITool or IToolChain, which both extend IHoldsOptions
	 *
	 * @since 3.0
	 */
	public IHoldsOptions getOptionHolder();

	/**
	 * @return the <code>IOption</code> that is the superclass of this
	 * option, or <code>null</code> if the attribute was not specified.
	 */
	public IOption getSuperClass();

	/**
	 * @param holder - the actual option-holder for the context-data. This holder
	 * is usually a subclass of this option's {@link #getOptionHolder() holder}.
	 * @return the option context-data to be used for macro resolution.
	 * @since 7.0
	 */
	public IOptionContextData getOptionContextData(IHoldsOptions holder);

	/**
	 * @return If this option is defined as an enumeration, this function returns
	 * the list of possible values for that enum.
	 *
	 * If this option is not defined as an enumeration, it returns <code>null</code>.
	 */
	public String[] getApplicableValues();

	/**
	 * @return the value for a boolean option.
	 */
	public boolean getBooleanValue() throws BuildException;

	/**
	 * @return the setting of the browseType attribute
	 */
	public int getBrowseType();

	/**
	 * Sets the browseType attribute.
	 *
	 * @param type - browseType attribute
	 */
	public void setBrowseType(int type);

	/**
	 * @return the setting of the browseFilterPath attribute. For options of {@link #BROWSE_FILE} and {@link #BROWSE_DIR} types.
	 * @since 7.0
	 */
	public String getBrowseFilterPath();

	/**
	 * Sets the browseFilterPath attribute. For options of {@link #BROWSE_FILE} and {@link #BROWSE_DIR} types.
	 * @param path - default filter-path for the underlying browse dialog
	 * @since 7.0
	 */
	public void setBrowseFilterPath(String path);

	/**
	 * @return the setting of the browseFilterExtensions attribute. For options of {@link #BROWSE_FILE} type.
	 * @since 7.0
	 */
	public String[] getBrowseFilterExtensions();

	/**
	 * Sets the browseFilterExtensions attribute. For options of {@link #BROWSE_FILE} type.
	 * @param extensions - file extensions to show in browse files dialog
	 *
	 * @since 7.0
	 */
	public void setBrowseFilterExtensions(String[] extensions);

	/**
	 * @return the setting of the resourceFilter attribute
	 */
	public int getResourceFilter();

	/**
	 * Sets the resourceFilter attribute.
	 *
	 * @param filter - resourceFilter attribute
	 */
	public void setResourceFilter(int filter);

	/**
	 * @return an instance of the class that calculates whether the option is visible,
	 * enabled, and used in command line generation
	 */
	public IOptionApplicability getApplicabilityCalculator();

	/**
	 * @return an array of strings containing the built-in values
	 * defined for a stringList, includePaths, definedSymbols, or libs
	 * option. If none have been defined, the array will be empty but
	 * never <code>null</code>.
	 */
	public String[] getBuiltIns();

	/**
	 * @return the category for this option.
	 */
	public IOptionCategory getCategory();

	/**
	 * Sets the category for this option.
	 */
	public void setCategory(IOptionCategory category);

	/**
	 * @return a <code>String</code> containing the actual command line
	 * option associated with the option
	 */
	public String getCommand();

	/**
	 * @return an instance of the class that overrides the default command generation for the option
	 * @since 8.0
	 */
	public IOptionCommandGenerator getCommandGenerator();

	/**
	 * Sets a <code>String</code> containing the actual command line
	 * option associated with the option
	 *
	 * @param command - the actual command line option
	 */
	public void setCommand(String command);

	/**
	 * @return {@code String} containing the actual command line
	 * option associated with a Boolean option when the value is {@code false}
	 */
	public String getCommandFalse();

	/**
	 * Sets a <code>String</code> containing the actual command line
	 * option associated with a Boolean option when the value is {@code false}
	 *
	 * @param commandFalse - the actual command line option associated
	 * with a Boolean option when the value is {@code false}
	 */
	public void setCommandFalse(String commandFalse);

	/**
	 * @return a <code>String</code> containing the tooltip
	 * associated with the option
	 */
	public String getToolTip();

	/**
	 * Sets a <code>String</code> containing the tooltip associated with the option
	 *
	 * @param tooltip - the tooltip associated with the option
	 */
	public void setToolTip(String tooltip);

	/**
	 * @return a <code>String</code> containing the contextId
	 * associated with the option
	 */
	public String getContextId();

	/**
	 * Sets a <code>String</code> containing the contextId associated with the option
	 *
	 * @param id - the contextId associated with the option
	 */
	public void setContextId(String id);

	/**
	 * @return the user-defined preprocessor symbols.
	 */
	public String[] getDefinedSymbols() throws BuildException;

	/**
	 *
	 * @param id - enumeration id
	 * @return the command associated with the enumeration id. For
	 * example, if the enumeration id was <code>gnu.debug.level.default</code>
	 * for the debug level option of the Gnu compiler, and the plugin
	 * manifest defined that as -g, then the return value would be the
	 * String "-g"
	 */
	public String getEnumCommand(String id) throws BuildException;

	/**
	 * Returns the command associated with the child of this option
	 * with the given id. Applies to options of types that has children
	 * for example {@link #TREE} or {@link #ENUMERATED}
	 *
	 * @param id - child id
	 * @return the command associated with the child id. For
	 * example, if the child id was <code>gnu.debug.level.default</code>
	 * for the debug level option of the Gnu compiler, and the plugin
	 * manifest defined that as -g, then the return value would be the
	 * String "-g"
	 *
	 * @throws BuildException if this option is not of type {@link #TREE} or {@link #ENUMERATED}
	 * @since 8.1
	 */
	public String getCommand(String id) throws BuildException;

	/**
	 * @param id - enumeration id
	 * @return the "name" associated with the enumeration id.
	 */
	public String getEnumName(String id) throws BuildException;

	/**
	 * Returns the name associated with the child of this option
	 * with the given id. Applies to options of types that has children
	 * for example {@link #TREE} or {@link #ENUMERATED}
	 *
	 * @param id The id to look for
	 * @return Name of the child with the passed id or <code>null</code> if not found.
	 * @throws BuildException if any issue happened while searching.
	 * @since 8.1
	 */
	public abstract String getName(String id) throws BuildException;

	/**
	 * @param name - a "name" associated with enumeration id
	 * @return enumeration id
	 */
	public String getEnumeratedId(String name) throws BuildException;

	/**
	 * Returns the id associated with the child of this option
	 * with the given name. Applies to options of types that has children
	 * for example {@link #TREE} or {@link #ENUMERATED}
	 *
	 * @param name the name of the child to look for.
	 * @return The id of the found child or <code>null</code> if not found.
	 * @throws BuildException if any error happened while searching
	 * @since 8.1
	 */
	public abstract String getId(String name) throws BuildException;

	/**
	 * @return an array of <code>String</code> containing the includes paths
	 * defined in the build model.
	 */
	public String[] getIncludePaths() throws BuildException;

	/**
	 * @return an array or <code>String</code>s containing the libraries
	 * that must be linked into the project.
	 */
	public String[] getLibraries() throws BuildException;

	/**
	 * @return an array or <code>String</code>s containing the library files
	 * that must be linked into the project.
	 *
	 * @since 7.0
	 */
	public String[] getLibraryFiles() throws BuildException;

	/**
	 * @return an array or <code>String</code>s containing the library paths
	 * passed to the linker.
	 *
	 * @throws BuildException if the option isn't of type IOption#LIBRARY_PATHS
	 * @since 8.0
	 */
	public String[] getLibraryPaths() throws BuildException;

	/**
	 * @return a <code>String</code> containing the unique ID of the selected
	 * enumeration in an enumerated option. For an option that has not been
	 * changed by the user, the receiver will answer with the default defined
	 * in the plugin manifest. If the user has modified the selection, the
	 * receiver will answer with the overridden selection.
	 *
	 * @throws BuildException if the option type is not an enumeration
	 */
	public String getSelectedEnum() throws BuildException;

	/**
	 * @return the current value for this option if it is a List of Strings.
	 */
	public String[] getStringListValue() throws BuildException;

	/**
	 * @return the current value for this option if it is a String
	 */
	public String getStringValue() throws BuildException;

	/**
	 * @return all of the user-defined object files that must be linked with
	 * the final build target.
	 */
	public String[] getUserObjects() throws BuildException;

	/**
	 * @return the raw value of this option which is the Object that contains the raw value of the option.
	 *         The type of Object is specific to the option type.
	 */
	public Object getValue();

	/**
	 * @return the raw default value of this option which is the Object that contains the raw default value of the option.
	 *          The type of Object is specific to the option type.
	 */
	public Object getDefaultValue();

	/**
	 * @return an instance of the class that overrides the default defaultValue generation for the option
	 * @since 8.5
	 */
	public IOptionDefaultValueGenerator getDefaultValueGenerator();

	/**
	 * @return the type for the value of the option.
	 */
	public int getValueType() throws BuildException;

	/**
	 * Sets the boolean value of the receiver to the value specified in the argument.
	 * If the receiver is not a reference to a boolean option, method will throw an
	 * exception.
	 */
	public void setValue(boolean value) throws BuildException;

	/**
	 * Sets the string value of the receiver to the value specified in the argument.
	 */
	public void setValue(String value) throws BuildException;

	/**
	 * Sets the value of the receiver to be an array of strings.
	 *
	 * @param value An array of strings to place in the option reference.
	 */
	public void setValue(String[] value) throws BuildException;

	/**
	 * Sets the raw value of this option.
	 *
	 * @param v The Object that contains the raw value of the option.  The type
	 *          of Object is specific to the option type.
	 */
	public void setValue(Object v);

	/**
	 * Sets the default value of this option.
	 *
	 * @param v The Object that contains the default value of the option.  The type
	 *          of Object is specific to the option type.
	 */
	public void setDefaultValue(Object v);

	/**
	 * Sets the value-type of this option.  Use with care.
	 */
	public void setValueType(int type);

	/**
	 * @return the value handler specified for this tool.
	 * @since 3.0
	 */
	public IManagedOptionValueHandler getValueHandler();

	/**
	 * @return the value handlers extra argument specified for this tool
	 * @since 3.0
	 */
	public String getValueHandlerExtraArgument();

	/**
	 * Sets the value handlers extra argument specified for this tool
	 * @since 3.0
	 */
	public void setValueHandlerExtraArgument(String extraArgument);

	/**
	 * @return the custom field-editor ID for this build-option. This ID should match a custom-field editor
	 * 			contributed through the {@code <fieldEditor>} element of the
	 * 			{@code org.eclipse.cdt.managedbuilder.ui.buildDefinitionsUI} extension-point.
	 * @since 8.0
	 */
	public String getFieldEditorId();

	/**
	 * @return an optional extra argument for the {@link #getFieldEditorId() field-editor}.
	 * @since 8.0
	 */
	public String getFieldEditorExtraArgument();

	/**
	 * Sets the optional extra argument for the field-editor.
	 * @param extraArgument free-form extra argument to be interpreted by the {@link #getFieldEditorId() field-editor}
	 * @since 8.0
	 */
	public void setFieldEditorExtraArgument(String extraArgument);

	/**
	 * @return <code>true</code> if this option was loaded from a manifest file,
	 * and <code>false</code> if it was loaded from a project (.cdtbuild) file.
	 */
	public boolean isExtensionElement();

	/**
	 * @return <code>true</code> if this option is valid and <code>false</code>
	 * if the option cannot be safely used due to an error in the MBS grammar.
	 *
	 * @since 3.0
	 *
	 * @pre Can only be used after Ids in MBS grammar have been resolved by pointers.
	 */
	public boolean isValid();

	/**
	 * @return the type of the option value, i.e. whether it is string, boolean,
	 * string list or enumeration. As opposed to the getValueType() method,
	 * the returned type does not specifies the "sense" of the value, e.g. whether it represents the list of includes or not.
	 *
	 * <br/> Possible return values:
	 *  <li/>{@link IOption#BOOLEAN}
	 *  <li/>{@link IOption#STRING}
	 *  <li/>{@link IOption#ENUMERATED}
	 *  <li/>{@link IOption#TREE}
	 *  <li/>{@link IOption#STRING_LIST} - corresponds to
	 *    {@link IOption#INCLUDE_PATH}, {@link IOption#PREPROCESSOR_SYMBOLS}, {@link IOption#LIBRARIES},
	 *    {@link IOption#OBJECTS}, {@link IOption#INCLUDE_FILES}, {@link IOption#LIBRARY_PATHS},
	 *    {@link IOption#LIBRARY_FILES}, {@link IOption#MACRO_FILES}
	 */
	int getBasicValueType() throws BuildException;

	/**
	 * @return in case the option basic value type is STRING_LIST, returns the String list value,
	 * throws BuildException otherwise
	 */
	String[] getBasicStringListValue() throws BuildException;

	public OptionStringValue[] getBasicStringListValueElements() throws BuildException;

	/**
	 * Flag to indicate whether the option is also used by scanner discovery.
	 * @return {@code true} if the option is intended to be passed to scanner discovery command
	 *    or {@code false} otherwise.
	 *
	 * @since 8.3
	 */
	public boolean isForScannerDiscovery();

	/**
	 * Returns the tree root of this option if it is of type {@link #TREE}
	 * @return tree root of this option or <code>null</code> if not found.
	 * @throws BuildException if this option is not of type {@link #TREE}
	 * @since 8.1
	 */
	public ITreeRoot getTreeRoot() throws BuildException;

	/**
	 * Represents the root of the tree of values in options of
	 * type {@link IOption#TREE}
	 * @author mhussein
	 * @since 8.1
	 *
	 */
	public interface ITreeRoot extends ITreeOption {
		/**
		 * Determines whether this tree allows selecting leaf nodes
		 * only or any nodes.
		 * @return <code>true</code> if only leaf nodes are allowed.
		 *         <code>false</code> if all child nodes could be selected.
		 * @see ITreeOption#isContainer()
		 */
		boolean isSelectLeafsOnly();

		/**
		 * Locates the node with the given id anywhere in the tree.
		 * @param id the id to search for
		 * @return the found child or <code>null</code> if not found.
		 */
		ITreeOption findNode(String id);

		/**
		 * Adds a new node to the tree.
		 * @param id The id of the new child.
		 * @param name The name of the new child.
		 * @param category The category of the new child.category is a '.'
		 * 				   separated string representing hierarchical path
		 * 				   of the child from the root of the tree.
		 * 				   can cause other nodes to be created to construct the
		 * 				   full path to the new child.
		 * @param order    The order of the newly created node among its peers.
		 *                 see {@link ITreeOption#getOrder()} for more information.
		 *                 Note: this order will apply to any parents auto-created
		 *                 according to the passed category.
		 *                 if <code>null</code> the {@link ITreeOption#DEFAULT_ORDER}
		 *                 will be used.
		 * @return the newly added node.
		 */
		ITreeOption addNode(String id, String name, String category, Integer order);
	}

	/**
	 * Represents a one of the possible values for options of type
	 * {@link IOption#TREE}
	 * @author mhussein
	 * @since 8.1
	 *
	 */
	public interface ITreeOption {
		/**
		 * The default order for tree nodes without order specified.
		 * Tree options with Orders smaller than this should appear above
		 * tree options with no order specified and vice versa.
		 */
		public static final int DEFAULT_ORDER = 1000;

		String getName();

		String getID();

		String getDescription();

		/**
		 * The order that determines UI appearance of the tree node,
		 * not necessarily its position in {@link #getChildren()}
		 * @return The order of this tree option relative to its peers.
		 * Smaller number means it should appear above peers.
		 * @see #DEFAULT_ORDER
		 */
		int getOrder();

		void setOrder(int order);

		ITreeOption[] getChildren();

		ITreeOption getParent();

		boolean isContainer();

		String getCommand();

		ITreeOption getChild(String name);

		/**
		 * Adds a new child directly under this node.
		 * @param id The id of the new child.
		 * @param name The name of the new child.
		 * @return The added child.
		 */
		ITreeOption addChild(String id, String name);

		void remove();

		String getIcon();
	}
}
