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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2014-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
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* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.hk2.utilities.reflection.internal;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Set;
import org.glassfish.hk2.utilities.cache.Computable;
import org.glassfish.hk2.utilities.cache.HybridCacheEntry;
import org.glassfish.hk2.utilities.cache.LRUHybridCache;
import org.glassfish.hk2.utilities.reflection.ClassReflectionHelper;
import org.glassfish.hk2.utilities.reflection.MethodWrapper;
/**
* @author jwells
*
*/
public class ClassReflectionHelperImpl implements ClassReflectionHelper {
private final int MAX_CACHE_SIZE = 20000;
private final LRUHybridCache postConstructCache =
new LRUHybridCache(MAX_CACHE_SIZE, new Computable>() {
@Override
public HybridCacheEntry compute(LifecycleKey key) {
return postConstructCache.createCacheEntry(key, getPostConstructMethod(key.clazz, key.matchingClass), false);
}
});
private final LRUHybridCache preDestroyCache =
new LRUHybridCache(MAX_CACHE_SIZE, new Computable>() {
@Override
public HybridCacheEntry compute(LifecycleKey key) {
return preDestroyCache.createCacheEntry(key, getPreDestroyMethod(key.clazz, key.matchingClass), false);
}
});
private final LRUHybridCache, Set> methodCache =
new LRUHybridCache, Set>(MAX_CACHE_SIZE, new Computable, HybridCacheEntry>>() {
@Override
public HybridCacheEntry> compute(Class key) {
return methodCache.createCacheEntry(key, ClassReflectionHelperUtilities.getAllMethodWrappers(key), false);
}
});
private final LRUHybridCache, Set> fieldCache =
new LRUHybridCache, Set>(MAX_CACHE_SIZE, new Computable, HybridCacheEntry>>() {
@Override
public HybridCacheEntry> compute(Class key) {
return fieldCache.createCacheEntry(key, ClassReflectionHelperUtilities.getAllFieldWrappers(key), false);
}
});
public ClassReflectionHelperImpl() {
}
/* (non-Javadoc)
* @see org.glassfish.hk2.utilities.reflection.ClassReflectionHelper#getAllMethods(java.lang.Class)
*/
@Override
public Set getAllMethods(final Class clazz) {
return methodCache.compute(clazz).getValue();
}
@Override
public Set getAllFields(final Class clazz) {
return fieldCache.compute(clazz).getValue();
}
@Override
public Method findPostConstruct(final Class clazz, Class matchingClass)
throws IllegalArgumentException {
return postConstructCache.compute(new LifecycleKey(clazz, matchingClass)).getValue();
}
@Override
public Method findPreDestroy(final Class clazz, Class matchingClass)
throws IllegalArgumentException {
return preDestroyCache.compute(new LifecycleKey(clazz, matchingClass)).getValue();
}
@Override
public void clean(Class clazz) {
while ((clazz != null) && !Object.class.equals(clazz)) {
postConstructCache.remove(new LifecycleKey(clazz, null));
preDestroyCache.remove(new LifecycleKey(clazz, null));
methodCache.remove(clazz);
fieldCache.remove(clazz);
clazz = clazz.getSuperclass();
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.utilities.reflection.ClassReflectionHelper#createMethodWrapper(java.lang.reflect.Method)
*/
@Override
public MethodWrapper createMethodWrapper(Method m) {
return new MethodWrapperImpl(m);
}
@Override
public void dispose() {
postConstructCache.clear();
preDestroyCache.clear();
methodCache.clear();
fieldCache.clear();
}
/* (non-Javadoc)
* @see org.glassfish.hk2.utilities.reflection.ClassReflectionHelper#size()
*/
@Override
public int size() {
return postConstructCache.size() +
preDestroyCache.size() +
methodCache.size() +
fieldCache.size();
}
private Method getPostConstructMethod(Class clazz, Class matchingClass) {
if (clazz == null || Object.class.equals(clazz)) return null;
if (matchingClass.isAssignableFrom(clazz)) {
// A little performance optimization
Method retVal;
try {
retVal = clazz.getMethod(ClassReflectionHelperUtilities.CONVENTION_POST_CONSTRUCT, new Class[0]);
}
catch (NoSuchMethodException e) {
retVal = null;
}
return retVal;
}
for (MethodWrapper wrapper : getAllMethods(clazz)) {
Method m = wrapper.getMethod();
if (ClassReflectionHelperUtilities.isPostConstruct(m)) return m;
}
return null;
}
private Method getPreDestroyMethod(Class clazz, Class matchingClass) {
if (clazz == null || Object.class.equals(clazz)) return null;
if (matchingClass.isAssignableFrom(clazz)) {
// A little performance optimization
Method retVal;
try {
retVal = clazz.getMethod(ClassReflectionHelperUtilities.CONVENTION_PRE_DESTROY, new Class[0]);
}
catch (NoSuchMethodException e) {
retVal = null;
}
return retVal;
}
for (MethodWrapper wrapper : getAllMethods(clazz)) {
Method m = wrapper.getMethod();
if (ClassReflectionHelperUtilities.isPreDestroy(m)) return m;
}
return null;
}
@Override
public String toString() {
return "ClassReflectionHelperImpl(" + System.identityHashCode(this) + ")";
}
private final static class LifecycleKey {
private final Class clazz;
private final Class matchingClass;
private final int hash;
private LifecycleKey(Class clazz, Class matchingClass) {
this.clazz = clazz;
this.matchingClass = matchingClass;
hash = clazz.hashCode();
}
@Override
public int hashCode() { return hash; }
@Override
public boolean equals(Object o) {
if (o == null) return false;
if (!(o instanceof LifecycleKey)) return false;
return clazz.equals(((LifecycleKey) o).clazz);
}
}
}
