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/*
* Copyright (c) 2012, 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 org.openjdk.tests.separate;
import java.util.HashMap;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
class DirectedClassLoader extends ClassLoader {
private HashMap<String,File> loadLocations;
private File defaultLocation;
private ClassFilePreprocessor[] preprocessors;
public DirectedClassLoader(
HashMap<String,File> locations, File fallback,
ClassFilePreprocessor ... preprocessors) {
loadLocations = new HashMap<>(locations);
defaultLocation = fallback;
this.preprocessors = preprocessors;
}
public DirectedClassLoader(
File fallback, ClassFilePreprocessor ... preprocessors) {
loadLocations = new HashMap<>();
defaultLocation = fallback;
this.preprocessors = preprocessors;
}
public DirectedClassLoader(ClassFilePreprocessor ... preprocessors) {
this((File)null, preprocessors);
}
public void setDefaultLocation(File dir) { this.defaultLocation = dir; }
public void setLocationFor(String name, File dir) {
loadLocations.put(name, dir);
}
@Override
protected Class<?> findClass(String name) {
String path = name.replace(".", File.separator) + ".class";
File location = loadLocations.get(name);
if (location == null || !(new File(location, path)).exists()) {
File def = new File(defaultLocation, path);
if (def.exists()) {
return defineFrom(name, new File(location, path));
}
} else {
return defineFrom(name, new File(location, path));
}
return null;
}
private Class<?> defineFrom(String name, File file) {
FileInputStream fis = null;
try {
try {
fis = new FileInputStream(file);
byte[] bytes = new byte[fis.available()];
int read = fis.read(bytes);
if (read != bytes.length) {
return null;
}
if (preprocessors != null) {
for (ClassFilePreprocessor cfp : preprocessors) {
bytes = cfp.preprocess(name, bytes);
}
}
return defineClass(name, bytes, 0, bytes.length);
} finally {
fis.close();
}
} catch (IOException e) {}
return null;
}
}
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