https://github.com/eclipse-ee4j/orb-gmbal-pfl/pfl-asm: GMBAL- Java EE Primative Function Library (Eclipse Foundation)
  • Russell Gold 
ASM: a very small and fast Java bytecode manipulation framework
Copyright (c) 2000-2007 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
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.

/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2007 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
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.glassfish.pfl.objectweb.asm.commons;

import org.glassfish.pfl.objectweb.asm.Type;
import org.glassfish.pfl.objectweb.asm.signature.SignatureReader;
import org.glassfish.pfl.objectweb.asm.signature.SignatureVisitor;
import org.glassfish.pfl.objectweb.asm.signature.SignatureWriter;


A class responsible for remapping types and names.
Subclasses can override the following methods:


Author:Eugene Kuleshov
/**
 * A class responsible for remapping types and names.
 * Subclasses can override the following methods:
 * 
 * <ul>
 * <li>{@link #map(String)} - map type</li>
 * <li>{@link #mapFieldName(String, String, String)} - map field name</li>
 * <li>{@link #mapMethodName(String, String, String)} - map method name</li>
 * </ul>
 * 
 * @author Eugene Kuleshov
 */
public abstract class Remapper {

    public String mapDesc(String desc) {
        Type t = Type.getType(desc);
        switch (t.getSort()) {
            case Type.ARRAY:
                String s = mapDesc(t.getElementType().getDescriptor());
                for (int i = 0; i < t.getDimensions(); ++i) {
                    s = '[' + s;
                }
                return s;
            case Type.OBJECT:
                String newType = map(t.getInternalName());
                if (newType != null) {
                    return 'L' + newType + ';';
                }
        }
        return desc;
    }

    private Type mapType(Type t) {
        switch (t.getSort()) {
            case Type.ARRAY:
                String s = mapDesc(t.getElementType().getDescriptor());
                for (int i = 0; i < t.getDimensions(); ++i) {
                    s = '[' + s;
                }
                return Type.getType(s);
            case Type.OBJECT:
                s = map(t.getInternalName());
                if(s != null) {
                    return Type.getObjectType(s);
                }
        }
        return t;
    }

    public String mapType(String type) {
        if (type == null) {
            return null;
        }
        return mapType(Type.getObjectType(type)).getInternalName();
    }

    public String[] mapTypes(String[] types) {
        String[] newTypes = null;
        boolean needMapping = false;
        for (int i = 0; i < types.length; i++) {
            String type = types[i];
            String newType = map(type);
            if (newType != null && newTypes == null) {
                newTypes = new String[types.length];
                if (i > 0) {
                    System.arraycopy(types, 0, newTypes, 0, i);
                }
                needMapping = true;
            }
            if (needMapping) {
                newTypes[i] = newType == null 
                    ? type 
                    : newType;
            }
        }
        return needMapping 
           ? newTypes 
           : types;
    }

    public String mapMethodDesc(String desc) {
        if("()V".equals(desc)) {
            return desc;
        }
        
        Type[] args = Type.getArgumentTypes(desc);
        String s = "(";
        for (int i = 0; i < args.length; i++) {
            s += mapDesc(args[i].getDescriptor());
        }
        Type returnType = Type.getReturnType(desc);
        if(returnType == Type.VOID_TYPE) {
            return s + ")V";
        }
        return s + ')' + mapDesc(returnType.getDescriptor());
    }

    public Object mapValue(Object value) {
        return value instanceof Type ? mapType((Type) value) : value;
    }

    
Params:
  • typeSignature – true if signature is a FieldTypeSignature, such as
       the signature parameter of the ClassVisitor.visitField or
       MethodVisitor.visitLocalVariable methods
/**
     * 
     * @param typeSignature true if signature is a FieldTypeSignature, such as
     *        the signature parameter of the ClassVisitor.visitField or
     *        MethodVisitor.visitLocalVariable methods
     */
    public String mapSignature(String signature, boolean typeSignature) {
        if (signature == null) {
            return null;
        }
        SignatureReader r = new SignatureReader(signature);
        SignatureWriter w = new SignatureWriter();
        SignatureVisitor a = createRemappingSignatureAdapter(w);
        if (typeSignature) {
            r.acceptType(a);
        } else {
            r.accept(a);
        }
        return w.toString();
    }

    protected SignatureVisitor createRemappingSignatureAdapter(
        SignatureVisitor v)
    {
        return new RemappingSignatureAdapter(v, this);
    }
    
    
Map method name to the new name. Subclasses can override. 

/**
     * Map method name to the new name. Subclasses can override. 
     */
    public String mapMethodName(String owner, String name, String desc) {
        return name;
    }

    
Map field name to the new name. Subclasses can override. 

/**
     * Map field name to the new name. Subclasses can override. 
     */
    public String mapFieldName(String owner, String name, String desc) {
        return name;
    }
    
    
Map type name to the new name. Subclasses can override. 

/**
     * Map type name to the new name. Subclasses can override. 
     */
    public String map(String typeName) {
        return typeName;
    }

}