/*
* Copyright (c) 2014, 2018, 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
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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.
*/
class Util {
/**
* The package name of all wrapper classes.
*/
static final String REPL_PACKAGE = "REPL";
/**
* The prefix for all wrapper class names.
*/
static final String REPL_CLASS_PREFIX = "$JShell$";
/**
* The name of the invoke method.
*/
static final String DOIT_METHOD_NAME = "do_it$";
/**
* The prefix for all anonymous classes upgraded to member classes.
*/
static final String JSHELL_ANONYMOUS = "$JShell$anonymous$";
/**
* A pattern matching the full or simple class name of a wrapper class.
*/
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.
*
* @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) {
/**代码未完, 请加载全部代码(NowJava.com).**/