jodd.introspector.AccessibleIntrospector Maven / Gradle / Ivy
// Copyright (c) 2003-2011, Jodd Team (jodd.org). All Rights Reserved.
package jodd.introspector;
import java.util.HashMap;
import java.util.Map;
/**
* Default {@link jodd.introspector.Introspector introspector} caches all class descriptors.
* Only accessible methods and fields are examined.
*
* It does not provide any more subtle logic behind, therefore, it should not be used
* in environments with dynamic class re-loading.
*
* todo: add optional max value for total number of class descriptors stored in cache
* @see SupportedIntrospector
*/
public class AccessibleIntrospector implements Introspector {
protected final Map cache = new HashMap();
/**
* {@inheritDoc}
*/
public ClassDescriptor lookup(Class type) {
ClassDescriptor cd = cache.get(type);
if (cd != null) {
cd.increaseUsageCount();
return cd;
}
cd = describeClass(type);
cache.put(type, cd);
return cd;
}
/**
* {@inheritDoc}
*/
public ClassDescriptor register(Class type) {
ClassDescriptor cd = describeClass(type);
cache.put(type, cd);
return cd;
}
/**
* Describes a class by creating a new instance of {@link ClassDescriptor}
* that examines all accessible methods and fields.
*/
protected ClassDescriptor describeClass(Class type) {
return new ClassDescriptor(type, true);
}
/**
* {@inheritDoc}
*/
public void reset() {
cache.clear();
}
/**
* {@inheritDoc}
*/
public String getStatistics() {
StringBuilder stat = new StringBuilder();
stat.append("Total classes: ").append(cache.size()).append('\n');
for (Map.Entry entry : cache.entrySet()) {
ClassDescriptor bcd = entry.getValue();
stat.append('\t').append(entry.getKey().getName()).append(" (");
stat.append(bcd.getUsageCount()).append(" uses)").append('\n');
}
return stat.toString();
}
}