ICommand.java

/*******************************************************************************
 *  Copyright (c) 2000, 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.core.resources;

import java.util.Map;
import org.eclipse.core.runtime.IProgressMonitor;

/**
 * A builder command names a builder and supplies a table of name-value argument pairs.
 * <p>
 * Changes to a command will only take effect if the modified command is installed into a project
 * description via {@link IProjectDescription#setBuildSpec(ICommand[])}.
 * </p>
 * 
 * @see IProjectDescription
 * @noimplement This interface is not intended to be implemented by clients.
 * @noextend This interface is not intended to be extended by clients.
 */
public interface ICommand {

	/**
	 * Returns a table of the arguments for this command, or <code>null</code> if there are no
	 * arguments. The argument names and values are both strings.
	 * 
	 * @return a table of command arguments (key type : <code>String</code> value type :
	 *         <code>String</code>), or <code>null</code>
	 * @see #setArguments(Map)
	 */
	public Map getArguments();

	/**
	 * Returns the name of the builder to run for this command, or <code>null</code> if the name has
	 * not been set.
	 * 
	 * @return the name of the builder, or <code>null</code> if not set
	 * @see #setBuilderName(String)
	 */
	public String getBuilderName();

	/**
	 * Returns whether this build command responds to the given kind of build.
	 * <p>
	 * By default, build commands respond to all kinds of builds.
	 * </p>
	 * 
	 * @param kind One of the <tt>*_BUILD</code> constants defined
	 * on <code>IncrementalProjectBuilder</code>
	 * @return <code>true</code> if this build command responds to the specified kind of build, and
	 *         <code>false</code> otherwise.
	 * @see #setBuilding(int, boolean)
	 * @since 3.1
	 */
	public boolean isBuilding(int kind);

	/**
	 * Returns whether this command allows configuring of what kinds of builds it responds to. By
	 * default, commands are only configurable if the corresponding builder defines the
	 * {@link #isConfigurable} attribute in its builder extension declaration. A command that is not
	 * configurable will always respond to all kinds of builds.
	 * 
	 * @return <code>true</code> If this command allows configuration of what kinds of builds it
	 *         responds to, and <code>false</code> otherwise.
	 * @see #setBuilding(int, boolean)
	 * @since 3.1
	 */
	public boolean isConfigurable();

	/**
	 * Sets this command's arguments to be the given table of name-values pairs, or to
	 * <code>null</code> if there are no arguments. The argument names and values are both strings.
	 * <p>
	 * Individual builders specify their argument expectations.
	 * </p>
	 * <p>
	 * Note that modifications to the arguments of a command being used in a running builder may
	 * affect the run of that builder but will not affect any subsequent runs. To change a command
	 * permanently you must install the command into the relevant project build spec using
	 * {@link IProjectDescription#setBuildSpec(ICommand[])}.
	 * </p>
	 * 
	 * @param args a table of command arguments (keys and values must both be of type
	 *            <code>String</code>), or <code>null</code>
	 * @see #getArguments()
	 */
	public void setArguments(Map args);

	/**
	 * Sets the name of the builder to run for this command.
	 * <p>
	 * The builder name comes from the extension that plugs in to the standard
	 * <code>org.eclipse.core.resources.builders</code> extension point.
	 * </p>
	 * 
	 * @param builderName the name of the builder
	 * @see #getBuilderName()
	 */
	public void setBuilderName(String builderName);

	/**
	 * Specifies whether this build command responds to the provided kind of build.
	 * <p>
	 * When a command is configured to not respond to a given kind of build, the builder instance
	 * will not be called when a build of that kind is initiated.
	 * </p>
	 * <p>
	 * This method has no effect if this build command does not allow its build kinds to be
	 * configured.
	 * </p>
	 * 
	 * @param kind One of the <tt>*_BUILD</code> constants defined
	 * 		on <code>IncrementalProjectBuilder</code>
	 * @param value <code>true</code> if this build command responds to the specified kind of build,
	 *            and <code>false</code> otherwise.
	 * @see #isBuilding(int)
	 * @see #isConfigurable()
	 * @see IWorkspace#build(int, IProgressMonitor)
	 * @see IProject#build(int, IProgressMonitor)
	 * @since 3.1
	 */
	public void setBuilding(int kind, boolean value);
}