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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
// 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 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):
 *
 * 
    *
  • ClassSignature = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code * visitInterfaceBound}* )* ({@code visitSuperclass} {@code visitInterface}* ) *
  • MethodSignature = ( {@code visitFormalTypeParameter} {@code visitClassBound}? {@code * visitInterfaceBound}* )* ({@code visitParameterType}* {@code visitReturnType} {@code * visitExceptionType}* ) *
  • TypeSignature = {@code visitBaseType} | {@code visitTypeVariable} | {@code * visitArrayType} | ( {@code visitClassType} {@code visitTypeArgument}* ( {@code * visitInnerClassType} {@code visitTypeArgument}* )* {@code visitEnd} ) ) *
* * @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 the * {@code ASM}x values in {@link Opcodes}. */ protected final int api; /** * Constructs a new {@link SignatureVisitor}. * * @param api the ASM API version implemented by this visitor. Must be one of the {@code * ASM}x values in {@link Opcodes}. */ protected SignatureVisitor(final int api) { if (api != Opcodes.ASM9 && api != Opcodes.ASM8 && api != Opcodes.ASM7 && api != Opcodes.ASM6 && api != Opcodes.ASM5 && api != Opcodes.ASM4 && api != Opcodes.ASM10_EXPERIMENTAL) { throw new IllegalArgumentException("Unsupported api " + api); } 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 {@code void} . */ 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 (see {@link * net.bytebuddy.jar.asm.Type#getInternalName()}). */ 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() {} }




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