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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file, and Oracle licenses the original version of this file under the BSD
 * license:
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/*
   Copyright 2009-2013 Attila Szegedi

   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
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     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
   * Neither the name of the copyright holder nor the names of
     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
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package jdk.dynalink.linker;

import jdk.dynalink.DynamicLinkerFactory;


Interface for objects that are used to transform one guarded invocation into another one. Typical usage is for implementing 
pre-link transformers. 
/**
 * Interface for objects that are used to transform one guarded invocation into
 * another one. Typical usage is for implementing
 * {@link DynamicLinkerFactory#setPrelinkTransformer(GuardedInvocationTransformer)
 * pre-link transformers}.
 */
@FunctionalInterface
public interface GuardedInvocationTransformer {
    
Given a guarded invocation, return either the same or potentially
different guarded invocation.

Params:
  • inv – the original guarded invocation.
  • linkRequest – the link request for which the invocation was
generated (usually by some linker).
  • linkerServices – the linker services that can be used during
creation of a new invocation.
Throws:
  • NullPointerException – is allowed to be thrown by implementations
if any of the passed arguments is null.
Returns:either the passed guarded invocation or a different one, with the difference usually determined based on information in the link request and the differing invocation created with the assistance of the linker services. Whether or not null is an accepted return value is dependent on the user of the filter.
/**
     * Given a guarded invocation, return either the same or potentially
     * different guarded invocation.
     * @param inv the original guarded invocation.
     * @param linkRequest the link request for which the invocation was
     * generated (usually by some linker).
     * @param linkerServices the linker services that can be used during
     * creation of a new invocation.
     * @return either the passed guarded invocation or a different one, with
     * the difference usually determined based on information in the link
     * request and the differing invocation created with the assistance of the
     * linker services. Whether or not {@code null} is an accepted return value
     * is dependent on the user of the filter.
     * @throws NullPointerException is allowed to be thrown by implementations
     * if any of the passed arguments is null.
     */
    public GuardedInvocation filter(GuardedInvocation inv, LinkRequest linkRequest, LinkerServices linkerServices);
}