/*
 * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.tools;

import java.util.Set;
import java.io.InputStream;
import java.io.OutputStream;
import javax.lang.model.SourceVersion;

Common interface for tools that can be invoked from a program. A tool is traditionally a command line program such as a compiler. The set of tools available with a platform is defined by the vendor.

Tools can be located using ServiceLoader.load(Class<Object>).

Author:Neal M Gafter, Peter von der Ahé, Jonathan Gibbons
Since:1.6
/** * Common interface for tools that can be invoked from a program. * A tool is traditionally a command line program such as a compiler. * The set of tools available with a platform is defined by the * vendor. * * <p>Tools can be located using {@link * java.util.ServiceLoader#load(Class)}. * * @author Neal M Gafter * @author Peter von der Ah&eacute; * @author Jonathan Gibbons * @since 1.6 */
public interface Tool {
Returns the name of this tool, or an empty string if no name is provided.
API Note:It is recommended that the name be the same as would be used on the command line: for example, "javac", "jar", "jlink".
Implementation Note:This implementation returns an empty string.
Returns:the name of this tool
Since:9
/** * Returns the name of this tool, or an empty string if no name is provided. * * @apiNote It is recommended that the name be the same as would be * used on the command line: for example, "javac", "jar", "jlink". * @implNote This implementation returns an empty string. * * @return the name of this tool * @since 9 */
default String name() { return ""; }
Run the tool with the given I/O channels and arguments. By convention a tool returns 0 for success and nonzero for errors. Any diagnostics generated will be written to either out or err in some unspecified format.
Params:
  • in – "standard" input; use System.in if null
  • out – "standard" output; use System.out if null
  • err – "standard" error; use System.err if null
  • arguments – arguments to pass to the tool
Throws:
Returns:0 for success; nonzero otherwise
/** * Run the tool with the given I/O channels and arguments. By * convention a tool returns 0 for success and nonzero for errors. * Any diagnostics generated will be written to either {@code out} * or {@code err} in some unspecified format. * * @param in "standard" input; use System.in if null * @param out "standard" output; use System.out if null * @param err "standard" error; use System.err if null * @param arguments arguments to pass to the tool * @return 0 for success; nonzero otherwise * @throws NullPointerException if the array of arguments contains * any {@code null} elements. */
int run(InputStream in, OutputStream out, OutputStream err, String... arguments);
Returns the source versions of the Java programming language supported by this tool.
Returns:a set of supported source versions
/** * Returns the source versions of the Java programming language * supported by this tool. * @return a set of supported source versions */
Set<SourceVersion> getSourceVersions(); }