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High performance primitives and utility library.
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/*
* Copyright 2014-2024 Real Logic Limited.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.agrona.generation;
import javax.tools.FileObject;
import javax.tools.ForwardingJavaFileManager;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import java.security.SecureClassLoader;
import java.util.HashMap;
import java.util.Map;
/**
* {@link ForwardingJavaFileManager} for storing class files which can be looked up by name.
*
* @param the kind of file manager forwarded to by this object.
*/
public class ClassFileManager extends ForwardingJavaFileManager
{
private final Map classObjectByNameMap = new HashMap<>();
/**
* @param standardManager file manager.
*/
public ClassFileManager(final M standardManager)
{
super(standardManager);
}
/**
* {@inheritDoc}
*/
public ClassLoader getClassLoader(final Location location)
{
return new SecureClassLoader()
{
protected Class findClass(final String name)
{
final byte[] buffer = classObjectByNameMap.get(name).getBytes();
return super.defineClass(name, buffer, 0, buffer.length);
}
};
}
/**
* {@inheritDoc}
*/
public JavaFileObject getJavaFileForOutput(
final Location location, final String className, final JavaFileObject.Kind kind, final FileObject sibling)
{
final JavaClassObject javaClassObject = new JavaClassObject(className, kind);
classObjectByNameMap.put(className, javaClassObject);
return javaClassObject;
}
}