com.fasterxml.jackson.databind.introspect.MemberKey Maven / Gradle / Ivy
package com.fasterxml.jackson.databind.introspect;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
/**
* Helper class needed to be able to efficiently access class
* member functions ({@link Method}s and {@link Constructor}s)
* in {@link java.util.Map}s.
*/
public final class MemberKey
{
final static Class[] NO_CLASSES = new Class[0];
final String _name;
final Class[] _argTypes;
public MemberKey(Method m)
{
this(m.getName(), m.getParameterTypes());
}
public MemberKey(Constructor ctor)
{
this("", ctor.getParameterTypes());
}
public MemberKey(String name, Class[] argTypes)
{
_name = name;
_argTypes = (argTypes == null) ? NO_CLASSES : argTypes;
}
public String getName() {
return _name;
}
public int argCount() {
return _argTypes.length;
}
@Override
public String toString() {
return _name + "(" + _argTypes.length+"-args)";
}
@Override
public int hashCode() {
return _name.hashCode() + _argTypes.length;
}
@Override
public boolean equals(Object o)
{
if (o == this) return true;
if (o == null) return false;
if (o.getClass() != getClass()) {
return false;
}
MemberKey other = (MemberKey) o;
if (!_name.equals(other._name)) {
return false;
}
Class[] otherArgs = other._argTypes;
int len = _argTypes.length;
if (otherArgs.length != len) {
return false;
}
for (int i = 0; i < len; ++i) {
Class type1 = otherArgs[i];
Class type2 = _argTypes[i];
if (type1 == type2) {
continue;
}
/* 23-Feb-2009, tatu: Are there any cases where we would have to
* consider some narrowing conversions or such? For now let's
* assume exact type match is enough
*/
/* 07-Apr-2009, tatu: Indeed there are (see [JACKSON-97]).
* This happens with generics when a bound is specified.
* I hope this works; check here must be transitive
*/
/* 14-Oct-2014, tatu: No, doing that is wrong. Conflicts may (and will) be
* handled at a later point; trying to change definition of equality
* will just cause problems like [jackson-core#158]
*/
/*
if (type1.isAssignableFrom(type2) || type2.isAssignableFrom(type1)) {
continue;
}
*/
return false;
}
return true;
}
}