org.objectweb.asm.commons.SimpleRemapper.java Source code

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Here is the source code for org.objectweb.asm.commons.SimpleRemapper.java

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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
//    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 TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package org.objectweb.asm.commons;

import java.util.Collections;
import java.util.Map;

/**
 * A {@link Remapper} using a {@link Map} to define its mapping.
 *
 * @author Eugene Kuleshov
 */
public class SimpleRemapper extends Remapper {

    private final Map<String, String> mapping;

    /**
     * Constructs a new {@link SimpleRemapper} with the given mapping.
     *
     * @param mapping a map specifying a remapping as follows:
     *     <ul>
     *       <li>for method names, the key is the owner, name and descriptor of the method (in the
     *           form &lt;owner&gt;.&lt;name&gt;&lt;descriptor&gt;), and the value is the new method
     *           name.
     *       <li>for invokedynamic method names, the key is the name and descriptor of the method (in
     *           the form .&lt;name&gt;&lt;descriptor&gt;), and the value is the new method name.
     *       <li>for field names, the key is the owner and name of the field (in the form
     *           &lt;owner&gt;.&lt;name&gt;), and the value is the new field name.
     *       <li>for internal names, the key is the old internal name, and the value is the new
     *           internal name.
     *     </ul>
     */
    public SimpleRemapper(final Map<String, String> mapping) {
        this.mapping = mapping;
    }

    /**
     * Constructs a new {@link SimpleRemapper} with the given mapping.
     *
     * @param oldName the key corresponding to a method, field or internal name (see {@link
     *     #SimpleRemapper(Map)} for the format of these keys).
     * @param newName the new method, field or internal name.
     */
    public SimpleRemapper(final String oldName, final String newName) {
        this.mapping = Collections.singletonMap(oldName, newName);
    }

    @Override
    public String mapMethodName(final String owner, final String name, final String descriptor) {
        String remappedName = map(owner + '.' + name + descriptor);
        return remappedName == null ? name : remappedName;
    }

    @Override
    public String mapInvokeDynamicMethodName(final String name, final String descriptor) {
        String remappedName = map('.' + name + descriptor);
        return remappedName == null ? name : remappedName;
    }

    @Override
    public String mapFieldName(final String owner, final String name, final String descriptor) {
        String remappedName = map(owner + '.' + name);
        return remappedName == null ? name : remappedName;
    }

    @Override
    public String map(final String key) {
        return mapping.get(key);
    }
}