org.purplejrank.reflect.MethodCache Maven / Gradle / Ivy
package org.purplejrank.reflect;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* Simple cache for methods
* @author robin
*
*/
public class MethodCache {
private Map declared = new HashMap();
private Map found = new HashMap();
public Method declared(Class cls, String name, Class... parameterTypes) {
if(cls == null)
return null;
String key = cls.getName() + ":" + name + Arrays.toString(parameterTypes);
if(declared.containsKey(key))
return declared.get(key);
Method m = null;
try {
m = cls.getDeclaredMethod(name, parameterTypes);
m.setAccessible(true);
} catch(NoSuchMethodException e) {
}
declared.put(key, m);
return m;
}
public Method find(Class cls, String name, Class... parameterTypes) {
if(cls == null)
return null;
String key = cls.getName() + ":" + name + Arrays.toString(parameterTypes);
if(found.containsKey(key))
return found.get(key);
Method m = declared(cls, name, parameterTypes);
if(m == null)
m = find(cls.getSuperclass(), name, parameterTypes);
found.put(key, m);
return m;
}
}