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/*
* Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation
package org.eclipse.persistence.asm.internal;
import org.eclipse.persistence.asm.ASMFactory;
import org.eclipse.persistence.exceptions.ValidationException;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.VarHandle;
import java.util.Map;
public final class Util {
//java.lang.invoke.VarHandle >= JDK 9
private Util() {
// no instance
}
public static Object getFieldValue(Map targetNames, String name, Class type) {
String asmService = ASMFactory.getAsmService();
try {
MethodHandles.Lookup lookup = MethodHandles.lookup();
String className = targetNames.get(asmService);
if (className == null) {
throw ValidationException.incorrectASMServiceProvided();
}
Class clazz = Class.forName(className);
VarHandle field = lookup.findStaticVarHandle(clazz, name, type);
return field.get();
} catch (ClassNotFoundException | IllegalAccessException | NoSuchFieldException e) {
throw ValidationException.notAvailableASMService();
}
}
}