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/*
* Copyright (c) 2024, 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.
*
* 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 compiler.lib.compile_framework;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
/**
* Build a ClassLoader that loads from classpath and {@code classesDir}.
* Helper class that generates a ClassLoader which allows loading classes
* from the classpath (see {@link Utils#getClassPaths()}) and {@code classesDir}.
* <p>
* The CompileFramework compiles all its classes to a specific {@code classesDir},
* and this generated ClassLoader thus can be used to load those classes.
*/
class ClassLoaderBuilder {
/**
* Build a ClassLoader that loads from classpath and {@code classesDir}.
*/
public static ClassLoader build(Path classesDir) {
ClassLoader sysLoader = ClassLoader.getSystemClassLoader();
try {
// Classpath for all included classes (e.g. IR Framework).
// Get all class paths, convert to URLs.
List<URL> urls = new ArrayList<>();
for (String path : Utils.getClassPaths()) {
urls.add(new File(path).toURI().toURL());
}
// And add in the compiled classes from this instance of CompileFramework.
urls.add(new File(classesDir.toString()).toURI().toURL());
return URLClassLoader.newInstance(urls.toArray(URL[]::new), sysLoader);
} catch (IOException e) {
throw new CompileFrameworkException("IOException while creating ClassLoader", e);
}
}
}
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