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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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package jdk.jshell;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import javax.lang.model.element.Name;

Assorted shared utilities and constants.
/** * Assorted shared utilities and constants. */
class Util {
The package name of all wrapper classes.
/** * The package name of all wrapper classes. */
static final String REPL_PACKAGE = "REPL";
The prefix for all wrapper class names.
/** * The prefix for all wrapper class names. */
static final String REPL_CLASS_PREFIX = "$JShell$";
The name of the invoke method.
/** * The name of the invoke method. */
static final String DOIT_METHOD_NAME = "do_it$";
The prefix for all anonymous classes upgraded to member classes.
/** * The prefix for all anonymous classes upgraded to member classes. */
static final String JSHELL_ANONYMOUS = "$JShell$anonymous$";
A pattern matching the full or simple class name of a wrapper class.
/** * A pattern matching the full or simple class name of a wrapper class. */
static final Pattern PREFIX_PATTERN = Pattern.compile( "(" + REPL_PACKAGE + "\\.)?" + "(?<class>" + Pattern.quote(REPL_CLASS_PREFIX) + "\\w+" + ")" + "[\\$\\.]?"); static final String REPL_DOESNOTMATTER_CLASS_NAME = REPL_CLASS_PREFIX + "DOESNOTMATTER"; static final Locale PARSED_LOCALE = Locale.ROOT; static boolean isDoIt(Name name) { return isDoIt(name.toString()); } static boolean isDoIt(String sname) { return sname.equals(DOIT_METHOD_NAME); } static String expunge(String s) { StringBuilder sb = new StringBuilder(); for (String comp : PREFIX_PATTERN.split(s)) { sb.append(comp); } return sb.toString(); }
Check if this is the name of something in JShell.
Params:
  • s – the name of the class, method, variable, ...
Returns:true if it is, or is within a JShell defined wrapper class
/** * Check if this is the name of something in JShell. * * @param s the name of the class, method, variable, ... * @return true if it is, or is within a JShell defined wrapper class */
static boolean isInJShellClass(String s) { Matcher m = PREFIX_PATTERN.matcher(s); return m.find() && m.start() == 0; } static String asLetters(int i) { if (i == 0) { return ""; } char buf[] = new char[33]; int charPos = 32; i = -i; while (i <= -26) { buf[charPos--] = (char) ('A'-(i % 26)); i = i / 26; } buf[charPos] = (char) ('A'-i); return new String(buf, charPos, (33 - charPos)); } static String trimEnd(String s) { int last = s.length() - 1; int i = last; while (i >= 0 && Character.isWhitespace(s.charAt(i))) { --i; } if (i != last) { return s.substring(0, i + 1); } else { return s; } } static <T> Stream<T> stream(Iterable<T> iterable) { return StreamSupport.stream(iterable.spliterator(), false); } static String[] join(String[] a1, String[] a2) { List<String> result = new ArrayList<>(); result.addAll(Arrays.asList(a1)); result.addAll(Arrays.asList(a2)); return result.toArray(new String[0]); } static class Pair<T, U> { final T first; final U second; Pair(T first, U second) { this.first = first; this.second = second; } } }