// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
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// 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.
//
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package net.bytebuddy.jar.asm.signature;
import net.bytebuddy.jar.asm.
Opcodes;
/**
* A visitor to visit a generic signature. The methods of this interface must be called in one of
* the three following orders (the last one is the only valid order for a {@link SignatureVisitor}
* that is returned by a method of this interface):
*
* <ul>
* <li><i>ClassSignature</i> = ( <tt>visitFormalTypeParameter</tt> <tt>visitClassBound</tt>?
* <tt>visitInterfaceBound</tt>* )* ( <tt>visitSuperclass</tt> <tt>visitInterface</tt>* )
* <li><i>MethodSignature</i> = ( <tt>visitFormalTypeParameter</tt> <tt>visitClassBound</tt>?
* <tt>visitInterfaceBound</tt>* )* ( <tt>visitParameterType</tt>* <tt>visitReturnType</tt>
* <tt>visitExceptionType</tt>* )
* <li><i>TypeSignature</i> = <tt>visitBaseType</tt> | <tt>visitTypeVariable</tt> |
* <tt>visitArrayType</tt> | ( <tt>visitClassType</tt> <tt>visitTypeArgument</tt>* (
* <tt>visitInnerClassType</tt> <tt>visitTypeArgument</tt>* )* <tt>visitEnd</tt> ) )
* </ul>
*
* @author Thomas Hallgren
* @author Eric Bruneton
*/
public abstract class
SignatureVisitor {
/** Wildcard for an "extends" type argument. */
public static final char
EXTENDS = '+';
/** Wildcard for a "super" type argument. */
public static final char
SUPER = '-';
/** Wildcard for a normal type argument. */
public static final char
INSTANCEOF = '=';
/**
* The ASM API version implemented by this visitor. The value of this field must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7_EXPERIMENTAL}.
*/
protected final int
api;
/**
* Constructs a new {@link SignatureVisitor}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link
* Opcodes#ASM7_EXPERIMENTAL}.
*/
public
SignatureVisitor(final int
api) {
if (
api !=
Opcodes.
ASM6
&&
api !=
Opcodes.
ASM5
&&
api !=
Opcodes.
ASM4
&&
api !=
Opcodes.
ASM7_EXPERIMENTAL) {
throw new
IllegalArgumentException();
}
this.
api =
api;
}
/**
* Visits a formal type parameter.
*
* @param name the name of the formal parameter.
*/
public void
visitFormalTypeParameter(final
String name) {}
/**
* Visits the class bound of the last visited formal type parameter.
*
* @return a non null visitor to visit the signature of the class bound.
*/
public
SignatureVisitor visitClassBound() {
return this;
}
/**
* Visits an interface bound of the last visited formal type parameter.
*
* @return a non null visitor to visit the signature of the interface bound.
*/
public
SignatureVisitor visitInterfaceBound() {
return this;
}
/**
* Visits the type of the super class.
*
* @return a non null visitor to visit the signature of the super class type.
*/
public
SignatureVisitor visitSuperclass() {
return this;
}
/**
* Visits the type of an interface implemented by the class.
*
* @return a non null visitor to visit the signature of the interface type.
*/
public
SignatureVisitor visitInterface() {
return this;
}
/**
* Visits the type of a method parameter.
*
* @return a non null visitor to visit the signature of the parameter type.
*/
public
SignatureVisitor visitParameterType() {
return this;
}
/**
* Visits the return type of the method.
*
* @return a non null visitor to visit the signature of the return type.
*/
public
SignatureVisitor visitReturnType() {
return this;
}
/**
* Visits the type of a method exception.
*
* @return a non null visitor to visit the signature of the exception type.
*/
public
SignatureVisitor visitExceptionType() {
return this;
}
/**
* Visits a signature corresponding to a primitive type.
*
* @param descriptor the descriptor of the primitive type, or 'V' for <tt>void</tt> .
*/
public void
visitBaseType(final char
descriptor) {}
/**
* Visits a signature corresponding to a type variable.
*
* @param name the name of the type variable.
*/
public void
visitTypeVariable(final
String name) {}
/**
* Visits a signature corresponding to an array type.
*
* @return a non null visitor to visit the signature of the array element type.
*/
public
SignatureVisitor visitArrayType() {
return this;
}
/**
* Starts the visit of a signature corresponding to a class or interface type.
*
* @param name the internal name of the class or interface.
*/
public void
visitClassType(final
String name) {}
/**
* Visits an inner class.
*
* @param name the local name of the inner class in its enclosing class.
*/
public void
visitInnerClassType(final
String name) {}
/** Visits an unbounded type argument of the last visited class or inner class type. */
public void
visitTypeArgument() {}
/**
* Visits a type argument of the last visited class or inner class type.
*
* @param wildcard '+', '-' or '='.
* @return a non null visitor to visit the signature of the type argument.
*/
public
SignatureVisitor visitTypeArgument(final char
wildcard) {
return this;
}
/** Ends the visit of a signature corresponding to a class or interface type. */
public void
visitEnd() {}
}