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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 jodd.asm7.signature;
import jodd.asm7.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):
*
*
*
* @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}.
*/
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}.
*/
public SignatureVisitor(final int api) {
if (api != Opcodes.ASM6 && api != Opcodes.ASM5 && api != Opcodes.ASM4 && api != Opcodes.ASM7) {
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 {@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.
*/
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() {}
}
