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There is a newer version: 6.1.6

/*
 * Copyright 2003 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.cglib.core;

import org.springframework.asm.Type;

/**
 * A representation of a method signature, containing the method name,
 * return type, and parameter types.
 */
public class Signature {
    private String name;
    private String desc;

    public Signature(String name, String desc) {
        // TODO: better error checking
        if (name.indexOf('(') >= 0) {
            throw new IllegalArgumentException("Name '" + name + "' is invalid");
        }
        this.name = name;
        this.desc = desc;
    }

    public Signature(String name, Type returnType, Type[] argumentTypes) {
        this(name, Type.getMethodDescriptor(returnType, argumentTypes));
    }

    public String getName() {
        return name;
    }

    public String getDescriptor() {
        return desc;
    }

    public Type getReturnType() {
        return Type.getReturnType(desc);
    }

    public Type[] getArgumentTypes() {
        return Type.getArgumentTypes(desc);
    }

    public String toString() {
        return name + desc;
    }

    public boolean equals(Object o) {
        if (o == null)
            return false;
        if (!(o instanceof Signature))
            return false;
        Signature other = (Signature)o;
        return name.equals(other.name) && desc.equals(other.desc);
    }

    public int hashCode() {
        return name.hashCode() ^ desc.hashCode();
    }
}