net.sf.cglib.core.DefaultNamingPolicy Maven / Gradle / Ivy
/*
* Copyright 2003,2004 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
*
* http://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 net.sf.cglib.core;
import java.util.Set;
/**
* The default policy used by {@link AbstractClassGenerator}.
* Generates names such as
* net.sf.cglib.Foo$$EnhancerByCGLIB$$38272841
* This is composed of a prefix based on the name of the superclass, a fixed
* string incorporating the CGLIB class responsible for generation, and a
* hashcode derived from the parameters used to create the object. If the same
* name has been previously been used in the same ClassLoader, a
* suffix is added to ensure uniqueness.
*/
public class DefaultNamingPolicy implements NamingPolicy {
public static final DefaultNamingPolicy INSTANCE = new DefaultNamingPolicy();
/**
* This allows to test collisions of {@code key.hashCode()}.
*/
private final static boolean STRESS_HASH_CODE = Boolean.getBoolean("net.sf.cglib.test.stressHashCodes");
public String getClassName(String prefix, String source, Object key, Predicate names) {
if (prefix == null) {
prefix = "net.sf.cglib.empty.Object";
} else if (prefix.startsWith("java")) {
prefix = "$" + prefix;
}
String base =
prefix + "$$" +
source.substring(source.lastIndexOf('.') + 1) +
getTag() + "$$" +
Integer.toHexString(STRESS_HASH_CODE ? 0 : key.hashCode());
String attempt = base;
int index = 2;
while (names.evaluate(attempt))
attempt = base + "_" + index++;
return attempt;
}
/**
* Returns a string which is incorporated into every generated class name.
* By default returns "ByCGLIB"
*/
protected String getTag() {
return "ByCGLIB";
}
public int hashCode() {
return getTag().hashCode();
}
public boolean equals(Object o) {
return (o instanceof DefaultNamingPolicy) && ((DefaultNamingPolicy) o).getTag().equals(getTag());
}
}