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/***
 * 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:
 * 
 * 
    *
  • {@link #map(String)} - map type
  • *
  • {@link #mapFieldName(String, String, String)} - map field name
  • *
  • {@link #mapMethodName(String, String, String)} - map method name
  • *
* * @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; } /** * * @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. */ public String mapMethodName(String owner, String name, String desc) { return name; } /** * 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. */ public String map(String typeName) { return typeName; } }




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