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Ehcache is an open source, standards-based cache used to boost performance,
offload the database and simplify scalability. Ehcache is robust, proven and full-featured and
this has made it the most widely-used Java-based cache.
/**
* Copyright Terracotta, Inc.
*
* 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.ehcache.constructs.nonstop.util;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* A utility class to check whether one class overrides all methods of its superclass or an interface that it implements
*
* @author Abhishek Sanoujam
*
*/
public final class OverrideCheck {
/**
* private constructor
*/
private OverrideCheck() {
//
}
/**
* Method to check a subclass overrides all methods in its superclass or the interface it implements
*
* @param parent
* @param subClass
*/
public static void check(Class parent, Class subClass) {
boolean excludeSuper = parent.isAssignableFrom(subClass);
Set superMethods = methodsFor(parent, false);
Set subMethods = methodsFor(subClass, excludeSuper);
List missing = new ArrayList();
for (String method : superMethods) {
if (!subMethods.contains(method)) {
// This class should be overriding all methods on the super class
missing.add(method);
}
}
if (!missing.isEmpty()) {
throw new RuntimeException(subClass.getName() + " is missing overrides (defined in " + parent.getName() + "):\n" + missing);
}
}
private static Set methodsFor(final Class klass, final boolean excludeSuper) {
Set set = new HashSet();
Class currClass = klass;
while (currClass != null && currClass != Object.class) {
Method[] methods = currClass.isInterface() ? currClass.getMethods() : currClass.getDeclaredMethods();
for (Method m : methods) {
int access = m.getModifiers();
if (Modifier.isStatic(access) || Modifier.isPrivate(access)) {
continue;
}
StringBuilder sb = new StringBuilder();
sb.append(m.getName()).append('(');
Class[] parameterTypes = m.getParameterTypes();
for (int j = 0; j < parameterTypes.length; j++) {
sb.append(parameterTypes[j].getName());
if (j < (parameterTypes.length - 1)) {
sb.append(',');
}
}
sb.append(')');
set.add(sb.toString());
}
if (excludeSuper) {
return set;
}
currClass = currClass.getSuperclass();
}
return set;
}
}