/*
* Copyright (c) 2016, 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 jdk.internal.jshell.tool;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Set;
import javax.lang.model.SourceVersion;
import javax.tools.Tool;
import jdk.jshell.tool.JavaShellToolBuilder;
/**
* Provider for launching the jshell tool.
*/
public class JShellToolProvider implements Tool {
/**
* Returns the name of this Java shell tool provider.
*
* @return the name of this tool provider
*/
@Override
public String name() {
return "jshell";
}
/**
* Run the jshell tool. The streams {@code out} and {@code err} are
* converted to {@code PrintStream} if they are not already.
* Any {@code Exception} is caught, printed and results in a non-zero return.
*
* @param in command line input (snippets and commands), and execution
* "standard" input; use System.in if null
* @param out command line output, feedback including errors, and execution
* "standard" output; use System.out if null
* @param err start-up errors and execution "standard" error; use System.err
* if null
* @param arguments arguments to pass to the tool
* @return the exit status with which the tool explicitly exited (if any),
* otherwise 0 for success or 1 for failure
* @throws NullPointerException if the array of arguments contains
* any {@code null} elements.
*/
@Override
public int run(InputStream in, OutputStream out, OutputStream err, String... arguments) {
InputStream xin =
(in == null)
? System.in
: in;
PrintStream xout =
(out == null)
? System.out
: (out instanceof PrintStream)
? (PrintStream) out
: new PrintStream(out);
PrintStream xerr =
(err == null)
? System.err
: (err instanceof PrintStream)
? (PrintStream) err
: new PrintStream(err);
try {
return JavaShellToolBuilder
.builder()
.in(xin, null)
.out(xout)
.err(xerr)
.start(arguments);
} catch (Throwable ex) {
xerr.println(ex.getMessage());
return 1;
}
}
/**
* Returns the source versions of the jshell tool.
* @return a set of supported source versions
*/
@Override
public Set<SourceVersion> getSourceVersions() {
return Collections.unmodifiableSet(
/**代码未完, 请加载全部代码(NowJava.com).**/