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# autoimports script requires -scripting mode
/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* It is tedious to import Java classes used in a script. Sometimes it is easier
* use simple names of java classes and have a script auto import Java classes.
* You can load this script at the start of an interactive jjs session or at the
* start of your script. This script defines a __noSuchProperty__ hook to auto
* import Java classes as needed and when they are referred to for the first time
* in your script. You can also call the "autoimports" function to print script
* statements that you need to use in your script, i.e., have the function generate
* a script to import Java classes used by your script so far. After running your
* script, you can call autoimports to get the exact Java imports you need and replace
* the autoimports load with the generated import statements (to avoid costly init of
* the autoimports script).
*/
(function() {
var ArrayList = Java.type("java.util.ArrayList");
var HashMap = Java.type("java.util.HashMap");
var JarFile = Java.type("java.util.jar.JarFile");
var File = Java.type("java.io.File");
var Files = Java.type("java.nio.file.Files");
var FileSystems = Java.type("java.nio.file.FileSystems");
var System = Java.type("java.lang.System");
var URI = Java.type("java.net.URI");
// initialize a class to package map by iterating all
// classes available in the system by walking through "jrt fs"
var clsToPkg = new HashMap();
// locate rt.jar from sun.boot.class.path
function findRtJar() {
var paths = System.getProperty("sun.boot.class.path").split(File.pathSeparator);
for each (var p in paths) {
if (p.endsWith("rt.jar") && new File(p).exists()) {
return p;
}
}
}
function addToClsToPkg(c, p) {
if (clsToPkg.containsKey(c)) {
var val = clsToPkg.get(c);
if (val instanceof ArrayList) {
val.add(p);
} else {
var al = new ArrayList();
al.add(val);
al.add(p);
clsToPkg.put(c, al);
}
} else {
clsToPkg.put(c, p);
}
}
// handle collision and allow user to choose package
function getPkgOfCls(c) {
var val = clsToPkg.get(c);
if (val instanceof ArrayList) {
var count = 1;
print("Multiple matches for " + c + ", choose package:");
for each (var v in val) {
print(count + ". " + v);
count++;
}
var choice = parseInt(readLine());
if (isNaN(choice) || choice < 1 || choice > val.size()) {
print("invalid choice: " + choice);
return undefined;
}
return val.get(choice - 1);
} else {
return val;
}
}
var rtJar = findRtJar();
var stream = new JarFile(rtJar).stream();
try {
stream.forEach(
function(entry) {
var str = entry.name;
if (str.endsWith(".class")) {
if (str.startsWith("java") ||
str.startsWith("javax") ||
str.startsWith("org")) {
var lastIdx = str.lastIndexOf('/');
if (lastIdx != -1) {
var pkg = str.substring(0, lastIdx).replaceAll('/', '.');
var cls = str.substring(lastIdx + 1, str.lastIndexOf(".class"));
addToClsToPkg(cls, pkg);
}
}
}
});
} finally {
stream.close();
}
var imports = new ArrayList();
var global = this;
var oldNoSuchProp = global.__noSuchProperty__;
this.__noSuchProperty__ = function(name) {
'use strict';
if (clsToPkg.containsKey(name)) {
var pkg = getPkgOfCls(name);
if (pkg) {
var clsName = pkg + "." + name;
imports.add("var " + name + " = Java.type('" + clsName + "');");
return global[name] = Java.type(clsName);
}
} else if (typeof oldNoSuchProp == 'function') {
return oldNoSuchProp.call(this, name);
}
if (typeof this == 'undefined') {
throw new ReferenceError(name);
} else {
return undefined;
}
}
this.autoimports = function() {
for each (var im in imports) {
print(im);
}
}
})();
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